1996-07-09 08:22:35 +02:00
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/*-------------------------------------------------------------------------
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*
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1999-02-14 00:22:53 +01:00
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* xact.c
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1997-09-07 07:04:48 +02:00
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* top level transaction system support routines
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1996-07-09 08:22:35 +02:00
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*
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2000-01-26 06:58:53 +01:00
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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1996-07-09 08:22:35 +02:00
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*
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*
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* IDENTIFICATION
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2000-12-28 14:00:29 +01:00
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* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.91 2000/12/28 13:00:08 vadim Exp $
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1997-09-07 07:04:48 +02:00
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*
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1996-07-09 08:22:35 +02:00
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* NOTES
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1997-09-07 07:04:48 +02:00
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* Transaction aborts can now occur two ways:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* 1) system dies from some internal cause (Assert, etc..)
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* 2) user types abort
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* These two cases used to be treated identically, but now
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* we need to distinguish them. Why? consider the following
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2000-06-28 05:33:33 +02:00
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* two situations:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* case 1 case 2
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* ------ ------
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* 1) user types BEGIN 1) user types BEGIN
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* 2) user does something 2) user does something
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* 3) user does not like what 3) system aborts for some reason
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2000-06-28 05:33:33 +02:00
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* she sees and types ABORT
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* In case 1, we want to abort the transaction and return to the
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* default state. In case 2, there may be more commands coming
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* our way which are part of the same transaction block and we have
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* to ignore these commands until we see an END transaction.
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* (or an ABORT! --djm)
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* Internal aborts are now handled by AbortTransactionBlock(), just as
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* they always have been, and user aborts are now handled by
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* UserAbortTransactionBlock(). Both of them rely on AbortTransaction()
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* to do all the real work. The only difference is what state we
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2000-01-05 19:23:54 +01:00
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* enter after AbortTransaction() does its work:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* * AbortTransactionBlock() leaves us in TBLOCK_ABORT and
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* * UserAbortTransactionBlock() leaves us in TBLOCK_ENDABORT
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1996-07-09 08:22:35 +02:00
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*
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2000-06-28 05:33:33 +02:00
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* Low-level transaction abort handling is divided into two phases:
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* * AbortTransaction() executes as soon as we realize the transaction
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* has failed. It should release all shared resources (locks etc)
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* so that we do not delay other backends unnecessarily.
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* * CleanupTransaction() executes when we finally see a user COMMIT
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* or ROLLBACK command; it cleans things up and gets us out of
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* the transaction internally. In particular, we mustn't destroy
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* TransactionCommandContext until this point.
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*
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1997-09-07 07:04:48 +02:00
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* NOTES
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* This file is an attempt at a redesign of the upper layer
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* of the V1 transaction system which was too poorly thought
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* out to describe. This new system hopes to be both simpler
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* in design, simpler to extend and needs to contain added
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* functionality to solve problems beyond the scope of the V1
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* system. (In particuler, communication of transaction
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* information between parallel backends has to be supported)
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* The essential aspects of the transaction system are:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* o transaction id generation
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* o transaction log updating
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* o memory cleanup
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* o cache invalidation
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* o lock cleanup
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* Hence, the functional division of the transaction code is
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* based on what of the above things need to be done during
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* a start/commit/abort transaction. For instance, the
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* routine AtCommit_Memory() takes care of all the memory
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* cleanup stuff done at commit time.
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* The code is layered as follows:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* StartTransaction
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* CommitTransaction
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* AbortTransaction
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2000-06-28 05:33:33 +02:00
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* CleanupTransaction
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* are provided to do the lower level work like recording
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* the transaction status in the log and doing memory cleanup.
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* above these routines are another set of functions:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* StartTransactionCommand
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* CommitTransactionCommand
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* AbortCurrentTransaction
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* These are the routines used in the postgres main processing
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* loop. They are sensitive to the current transaction block state
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* and make calls to the lower level routines appropriately.
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*
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* Support for transaction blocks is provided via the functions:
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*
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* StartTransactionBlock
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* CommitTransactionBlock
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* AbortTransactionBlock
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* These are invoked only in responce to a user "BEGIN", "END",
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* or "ABORT" command. The tricky part about these functions
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* is that they are called within the postgres main loop, in between
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* the StartTransactionCommand() and CommitTransactionCommand().
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* For example, consider the following sequence of user commands:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* 1) begin
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* 2) retrieve (foo.all)
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* 3) append foo (bar = baz)
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* 4) end
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* in the main processing loop, this results in the following
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* transaction sequence:
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* / StartTransactionCommand();
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* 1) / ProcessUtility(); << begin
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* \ StartTransactionBlock();
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* \ CommitTransactionCommand();
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* / StartTransactionCommand();
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* 2) < ProcessQuery(); << retrieve (foo.all)
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* \ CommitTransactionCommand();
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* / StartTransactionCommand();
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* 3) < ProcessQuery(); << append foo (bar = baz)
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* \ CommitTransactionCommand();
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* / StartTransactionCommand();
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* 4) / ProcessUtility(); << end
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* \ CommitTransactionBlock();
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* \ CommitTransactionCommand();
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* The point of this example is to demonstrate the need for
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* StartTransactionCommand() and CommitTransactionCommand() to
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* be state smart -- they should do nothing in between the calls
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* to StartTransactionBlock() and EndTransactionBlock() and
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* outside these calls they need to do normal start/commit
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* processing.
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* Furthermore, suppose the "retrieve (foo.all)" caused an abort
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* condition. We would then want to abort the transaction and
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* ignore all subsequent commands up to the "end".
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* -cim 3/23/90
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1996-07-09 08:22:35 +02:00
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*
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*-------------------------------------------------------------------------
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*/
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1996-10-21 09:15:18 +02:00
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1998-07-21 06:17:30 +02:00
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/*
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* Large object clean up added in CommitTransaction() to prevent buffer leaks.
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* [PA, 7/17/98]
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* [PA] is Pascal Andr<EFBFBD> <andre@via.ecp.fr>
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*/
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1999-07-16 01:04:24 +02:00
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#include "postgres.h"
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1996-10-21 09:15:18 +02:00
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2000-10-20 13:01:21 +02:00
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#include <sys/time.h>
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1999-08-08 22:12:52 +02:00
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#include "access/nbtree.h"
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1999-07-16 01:04:24 +02:00
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#include "catalog/heap.h"
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2000-02-18 10:30:20 +01:00
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#include "catalog/index.h"
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1999-07-16 01:04:24 +02:00
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#include "commands/async.h"
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#include "commands/sequence.h"
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1999-09-29 18:06:40 +02:00
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#include "commands/trigger.h"
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2000-06-28 05:33:33 +02:00
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#include "executor/spi.h"
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1999-07-16 01:04:24 +02:00
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#include "libpq/be-fsstubs.h"
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2000-09-27 12:41:55 +02:00
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#include "miscadmin.h"
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1999-07-16 07:00:38 +02:00
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#include "storage/proc.h"
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1999-09-24 02:25:33 +02:00
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#include "storage/sinval.h"
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2000-11-08 23:10:03 +01:00
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#include "storage/smgr.h"
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1999-07-16 07:00:38 +02:00
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#include "utils/inval.h"
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2000-06-28 05:33:33 +02:00
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#include "utils/memutils.h"
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1999-07-16 07:00:38 +02:00
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#include "utils/portal.h"
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2000-08-06 06:17:47 +02:00
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#include "utils/catcache.h"
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1999-07-16 07:00:38 +02:00
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#include "utils/relcache.h"
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2000-06-28 05:33:33 +02:00
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#include "utils/temprel.h"
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1998-07-21 06:17:30 +02:00
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2000-04-12 19:17:23 +02:00
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extern bool SharedBufferChanged;
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1999-06-29 06:54:49 +02:00
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2000-10-28 18:21:00 +02:00
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void RecordTransactionCommit(void);
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1997-09-08 04:41:22 +02:00
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static void AbortTransaction(void);
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static void AtAbort_Cache(void);
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static void AtAbort_Locks(void);
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static void AtAbort_Memory(void);
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2000-06-28 05:33:33 +02:00
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static void AtCleanup_Memory(void);
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1997-09-08 04:41:22 +02:00
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static void AtCommit_Cache(void);
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2000-01-10 07:30:56 +01:00
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static void AtCommit_LocalCache(void);
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1997-09-08 04:41:22 +02:00
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static void AtCommit_Locks(void);
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static void AtCommit_Memory(void);
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static void AtStart_Cache(void);
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static void AtStart_Locks(void);
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static void AtStart_Memory(void);
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2000-06-28 05:33:33 +02:00
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static void CleanupTransaction(void);
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1997-09-08 04:41:22 +02:00
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static void CommitTransaction(void);
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static void RecordTransactionAbort(void);
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static void StartTransaction(void);
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1997-08-19 23:40:56 +02:00
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1996-07-09 08:22:35 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* global variables holding the current transaction state.
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* Note: when we are running several slave processes, the
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* current transaction state data is copied into shared memory
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* and the CurrentTransactionState pointer changed to
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* point to the shared copy. All this occurrs in slaves.c
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1996-07-09 08:22:35 +02:00
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* ----------------
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*/
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TransactionStateData CurrentTransactionStateData = {
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1997-09-07 07:04:48 +02:00
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0, /* transaction id */
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FirstCommandId, /* command id */
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2000-03-17 03:36:41 +01:00
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0, /* scan command id */
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1997-09-07 07:04:48 +02:00
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0x0, /* start time */
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TRANS_DEFAULT, /* transaction state */
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TBLOCK_DEFAULT /* transaction block state */
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};
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1996-07-09 08:22:35 +02:00
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1999-02-03 22:18:02 +01:00
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TransactionState CurrentTransactionState = &CurrentTransactionStateData;
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1996-07-09 08:22:35 +02:00
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1999-05-25 18:15:34 +02:00
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int DefaultXactIsoLevel = XACT_READ_COMMITTED;
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int XactIsoLevel;
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1998-12-15 13:47:01 +01:00
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2000-10-20 13:01:21 +02:00
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#include "access/xlogutils.h"
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2000-11-30 02:47:33 +01:00
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int CommitDelay = 5; /* 1/200000 sec */
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2000-10-20 13:01:21 +02:00
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static void (*_RollbackFunc)(void*) = NULL;
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static void *_RollbackData = NULL;
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1996-07-09 08:22:35 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* info returned when the system is disabled
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1997-03-15 00:21:12 +01:00
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*
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* Apparently a lot of this code is inherited from other prototype systems.
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* For DisabledStartTime, use a symbolic value to make the relationships clearer.
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* The old value of 1073741823 corresponds to a date in y2004, which is coming closer
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1997-09-07 07:04:48 +02:00
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* every day. It appears that if we return a value guaranteed larger than
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* any real time associated with a transaction then comparisons in other
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* modules will still be correct. Let's use BIG_ABSTIME for this. tgl 2/14/97
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1996-07-09 08:22:35 +02:00
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*
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1997-09-07 07:04:48 +02:00
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* Note: I have no idea what the significance of the
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* 1073741823 in DisabledStartTime.. I just carried
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* this over when converting things from the old
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* V1 transaction system. -cim 3/18/90
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1996-07-09 08:22:35 +02:00
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* ----------------
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*/
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1997-09-08 23:56:23 +02:00
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TransactionId DisabledTransactionId = (TransactionId) -1;
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1997-09-07 07:04:48 +02:00
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1997-09-08 23:56:23 +02:00
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CommandId DisabledCommandId = (CommandId) -1;
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1997-09-07 07:04:48 +02:00
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|
|
|
1997-09-08 04:41:22 +02:00
|
|
|
|
AbsoluteTime DisabledStartTime = (AbsoluteTime) BIG_ABSTIME; /* 1073741823; */
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* overflow flag
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-08 04:41:22 +02:00
|
|
|
|
bool CommandIdCounterOverflowFlag;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* catalog creation transaction bootstrapping flag.
|
|
|
|
|
* This should be eliminated and added to the transaction
|
|
|
|
|
* state stuff. -cim 3/19/90
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-08 04:41:22 +02:00
|
|
|
|
bool AMI_OVERRIDE = false;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* transaction state accessors
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* TranactionFlushEnabled()
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* SetTransactionFlushEnabled()
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* These are used to test and set the "TransactionFlushState"
|
|
|
|
|
* varable. If this variable is true (the default), then
|
|
|
|
|
* the system will flush all dirty buffers to disk at the end
|
|
|
|
|
* of each transaction. If false then we are assuming the
|
|
|
|
|
* buffer pool resides in stable main memory, in which case we
|
|
|
|
|
* only do writes as necessary.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-09-08 04:41:22 +02:00
|
|
|
|
static int TransactionFlushState = 1;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
int
|
1996-11-10 04:06:38 +01:00
|
|
|
|
TransactionFlushEnabled(void)
|
1997-09-07 07:04:48 +02:00
|
|
|
|
{
|
|
|
|
|
return TransactionFlushState;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
1997-08-19 23:40:56 +02:00
|
|
|
|
#ifdef NOT_USED
|
1996-07-09 08:22:35 +02:00
|
|
|
|
void
|
|
|
|
|
SetTransactionFlushEnabled(bool state)
|
1997-09-07 07:04:48 +02:00
|
|
|
|
{
|
|
|
|
|
TransactionFlushState = (state == true);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* IsTransactionState
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* This returns true if we are currently running a query
|
|
|
|
|
* within an executing transaction.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
bool
|
1996-11-10 04:06:38 +01:00
|
|
|
|
IsTransactionState(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
switch (s->state)
|
|
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
|
case TRANS_DEFAULT:
|
|
|
|
|
return false;
|
|
|
|
|
case TRANS_START:
|
|
|
|
|
return true;
|
|
|
|
|
case TRANS_INPROGRESS:
|
|
|
|
|
return true;
|
|
|
|
|
case TRANS_COMMIT:
|
|
|
|
|
return true;
|
|
|
|
|
case TRANS_ABORT:
|
|
|
|
|
return true;
|
|
|
|
|
case TRANS_DISABLED:
|
|
|
|
|
return false;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Shouldn't get here, but lint is not happy with this...
|
|
|
|
|
*/
|
1998-09-01 05:29:17 +02:00
|
|
|
|
return false;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
1999-05-25 18:15:34 +02:00
|
|
|
|
|
1998-10-08 20:30:52 +02:00
|
|
|
|
#endif
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* IsAbortedTransactionBlockState
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* This returns true if we are currently running a query
|
|
|
|
|
* within an aborted transaction block.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
bool
|
2000-10-24 22:06:39 +02:00
|
|
|
|
IsAbortedTransactionBlockState(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_ABORT)
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
|
|
return false;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* OverrideTransactionSystem
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* This is used to temporarily disable the transaction
|
|
|
|
|
* processing system in order to do initialization of
|
|
|
|
|
* the transaction system data structures and relations
|
|
|
|
|
* themselves.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-09-08 04:41:22 +02:00
|
|
|
|
int SavedTransactionState;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
OverrideTransactionSystem(bool flag)
|
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (flag == true)
|
|
|
|
|
{
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
SavedTransactionState = s->state;
|
|
|
|
|
s->state = TRANS_DISABLED;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
if (s->state != TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
s->state = SavedTransactionState;
|
|
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* GetCurrentTransactionId
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* This returns the id of the current transaction, or
|
|
|
|
|
* the id of the "disabled" transaction.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
TransactionId
|
2000-10-24 22:06:39 +02:00
|
|
|
|
GetCurrentTransactionId(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* if the transaction system is disabled, we return
|
|
|
|
|
* the special "disabled" transaction id.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return (TransactionId) DisabledTransactionId;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* otherwise return the current transaction id.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
return (TransactionId) s->transactionIdData;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* GetCurrentCommandId
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
CommandId
|
2000-10-24 22:06:39 +02:00
|
|
|
|
GetCurrentCommandId(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* if the transaction system is disabled, we return
|
|
|
|
|
* the special "disabled" command id.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return (CommandId) DisabledCommandId;
|
|
|
|
|
|
|
|
|
|
return s->commandId;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
1997-08-29 11:05:25 +02:00
|
|
|
|
CommandId
|
2000-10-24 22:06:39 +02:00
|
|
|
|
GetScanCommandId(void)
|
1997-08-29 11:05:25 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* if the transaction system is disabled, we return
|
|
|
|
|
* the special "disabled" command id.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return (CommandId) DisabledCommandId;
|
|
|
|
|
|
|
|
|
|
return s->scanCommandId;
|
1997-08-29 11:05:25 +02:00
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* GetCurrentTransactionStartTime
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
AbsoluteTime
|
2000-10-24 22:06:39 +02:00
|
|
|
|
GetCurrentTransactionStartTime(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* if the transaction system is disabled, we return
|
|
|
|
|
* the special "disabled" starting time.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return (AbsoluteTime) DisabledStartTime;
|
|
|
|
|
|
|
|
|
|
return s->startTime;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* TransactionIdIsCurrentTransactionId
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
bool
|
|
|
|
|
TransactionIdIsCurrentTransactionId(TransactionId xid)
|
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (AMI_OVERRIDE)
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return (bool)
|
|
|
|
|
TransactionIdEquals(xid, s->transactionIdData);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* CommandIdIsCurrentCommandId
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
bool
|
|
|
|
|
CommandIdIsCurrentCommandId(CommandId cid)
|
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (AMI_OVERRIDE)
|
|
|
|
|
return false;
|
|
|
|
|
|
1999-02-03 22:18:02 +01:00
|
|
|
|
return (cid == s->commandId) ? true : false;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
1997-08-29 11:05:25 +02:00
|
|
|
|
bool
|
|
|
|
|
CommandIdGEScanCommandId(CommandId cid)
|
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (AMI_OVERRIDE)
|
|
|
|
|
return false;
|
|
|
|
|
|
1999-02-03 22:18:02 +01:00
|
|
|
|
return (cid >= s->scanCommandId) ? true : false;
|
1997-08-29 11:05:25 +02:00
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ClearCommandIdCounterOverflowFlag
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
#ifdef NOT_USED
|
1996-07-09 08:22:35 +02:00
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
ClearCommandIdCounterOverflowFlag(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
CommandIdCounterOverflowFlag = false;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1997-08-19 23:40:56 +02:00
|
|
|
|
#endif
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* CommandCounterIncrement
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
CommandCounterIncrement(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
CurrentTransactionStateData.commandId += 1;
|
|
|
|
|
if (CurrentTransactionStateData.commandId == FirstCommandId)
|
|
|
|
|
{
|
|
|
|
|
CommandIdCounterOverflowFlag = true;
|
1998-01-07 22:07:04 +01:00
|
|
|
|
elog(ERROR, "You may only have 2^32-1 commands per transaction");
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-03 22:18:02 +01:00
|
|
|
|
CurrentTransactionStateData.scanCommandId = CurrentTransactionStateData.commandId;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
2000-01-10 07:30:56 +01:00
|
|
|
|
/*
|
2000-04-12 19:17:23 +02:00
|
|
|
|
* make cache changes visible to me. AtCommit_LocalCache() instead of
|
|
|
|
|
* AtCommit_Cache() is called here.
|
2000-01-10 07:30:56 +01:00
|
|
|
|
*/
|
|
|
|
|
AtCommit_LocalCache();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtStart_Cache();
|
1998-12-16 12:53:55 +01:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
void
|
|
|
|
|
SetScanCommandId(CommandId savedId)
|
1997-08-29 11:05:25 +02:00
|
|
|
|
{
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
CurrentTransactionStateData.scanCommandId = savedId;
|
|
|
|
|
|
1997-08-29 11:05:25 +02:00
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* initialization stuff
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
InitializeTransactionSystem(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
InitializeTransactionLog();
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* StartTransaction stuff
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtStart_Cache
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtStart_Cache(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
DiscardInvalid();
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtStart_Locks
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtStart_Locks(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* at present, it is unknown to me what belongs here -cim 3/18/90
|
|
|
|
|
*
|
|
|
|
|
* There isn't anything to do at the start of a xact for locks. -mer
|
|
|
|
|
* 5/24/92
|
|
|
|
|
*/
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtStart_Memory
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtStart_Memory(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
2000-06-28 05:33:33 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* We shouldn't have any transaction contexts already.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
Assert(TopTransactionContext == NULL);
|
|
|
|
|
Assert(TransactionCommandContext == NULL);
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* Create a toplevel context for the transaction.
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-06-28 05:33:33 +02:00
|
|
|
|
TopTransactionContext =
|
|
|
|
|
AllocSetContextCreate(TopMemoryContext,
|
|
|
|
|
"TopTransactionContext",
|
|
|
|
|
ALLOCSET_DEFAULT_MINSIZE,
|
|
|
|
|
ALLOCSET_DEFAULT_INITSIZE,
|
|
|
|
|
ALLOCSET_DEFAULT_MAXSIZE);
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* Create a statement-level context and make it active.
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-06-28 05:33:33 +02:00
|
|
|
|
TransactionCommandContext =
|
|
|
|
|
AllocSetContextCreate(TopTransactionContext,
|
|
|
|
|
"TransactionCommandContext",
|
|
|
|
|
ALLOCSET_DEFAULT_MINSIZE,
|
|
|
|
|
ALLOCSET_DEFAULT_INITSIZE,
|
|
|
|
|
ALLOCSET_DEFAULT_MAXSIZE);
|
|
|
|
|
MemoryContextSwitchTo(TransactionCommandContext);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* CommitTransaction stuff
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* RecordTransactionCommit
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* Note: the two calls to BufferManagerFlush() exist to ensure
|
|
|
|
|
* that data pages are written before log pages. These
|
|
|
|
|
* explicit calls should be replaced by a more efficient
|
|
|
|
|
* ordered page write scheme in the buffer manager
|
|
|
|
|
* -cim 3/18/90
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
2000-10-28 18:21:00 +02:00
|
|
|
|
void
|
|
|
|
|
RecordTransactionCommit()
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
|
TransactionId xid;
|
|
|
|
|
int leak;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
|
|
xid = GetCurrentTransactionId();
|
|
|
|
|
|
|
|
|
|
leak = BufferPoolCheckLeak();
|
|
|
|
|
|
2000-11-05 23:50:21 +01:00
|
|
|
|
if (MyLastRecPtr.xrecoff != 0)
|
2000-10-24 11:56:23 +02:00
|
|
|
|
{
|
2000-12-28 14:00:29 +01:00
|
|
|
|
XLogRecData rdata;
|
2000-10-24 11:56:23 +02:00
|
|
|
|
xl_xact_commit xlrec;
|
|
|
|
|
struct timeval delay;
|
|
|
|
|
XLogRecPtr recptr;
|
|
|
|
|
|
2000-10-28 18:21:00 +02:00
|
|
|
|
BufmgrCommit();
|
|
|
|
|
|
2000-10-24 11:56:23 +02:00
|
|
|
|
xlrec.xtime = time(NULL);
|
2000-12-28 14:00:29 +01:00
|
|
|
|
rdata.buffer = InvalidBuffer;
|
|
|
|
|
rdata.data = (char *)(&xlrec);
|
|
|
|
|
rdata.len = SizeOfXactCommit;
|
|
|
|
|
rdata.next = NULL;
|
|
|
|
|
|
2000-12-03 11:27:29 +01:00
|
|
|
|
START_CRIT_CODE;
|
2000-10-24 11:56:23 +02:00
|
|
|
|
/*
|
2000-11-30 09:46:26 +01:00
|
|
|
|
* SHOULD SAVE ARRAY OF RELFILENODE-s TO DROP
|
2000-10-24 11:56:23 +02:00
|
|
|
|
*/
|
2000-12-28 14:00:29 +01:00
|
|
|
|
recptr = XLogInsert(RM_XACT_ID, XLOG_XACT_COMMIT, &rdata);
|
2000-10-24 11:56:23 +02:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Sleep before commit! So we can flush more than one
|
|
|
|
|
* commit records per single fsync.
|
|
|
|
|
*/
|
|
|
|
|
delay.tv_sec = 0;
|
|
|
|
|
delay.tv_usec = CommitDelay;
|
|
|
|
|
(void) select(0, NULL, NULL, NULL, &delay);
|
|
|
|
|
XLogFlush(recptr);
|
|
|
|
|
MyLastRecPtr.xrecoff = 0;
|
|
|
|
|
|
|
|
|
|
TransactionIdCommit(xid);
|
|
|
|
|
|
|
|
|
|
MyProc->logRec.xrecoff = 0;
|
2000-12-03 11:27:29 +01:00
|
|
|
|
END_CRIT_CODE;
|
2000-10-24 11:56:23 +02:00
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
|
|
|
|
if (leak)
|
2000-04-09 06:43:20 +02:00
|
|
|
|
ResetBufferPool(true);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtCommit_Cache
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtCommit_Cache(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
2000-01-10 07:30:56 +01:00
|
|
|
|
* Make catalog changes visible to all backend.
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
RegisterInvalid(true);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
2000-01-10 07:30:56 +01:00
|
|
|
|
/* --------------------------------
|
|
|
|
|
* AtCommit_LocalCache
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtCommit_LocalCache(void)
|
2000-01-10 07:30:56 +01:00
|
|
|
|
{
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Make catalog changes visible to me for the next command.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
ImmediateLocalInvalidation(true);
|
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtCommit_Locks
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtCommit_Locks(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* XXX What if ProcReleaseLocks fails? (race condition?)
|
|
|
|
|
*
|
|
|
|
|
* Then you're up a creek! -mer 5/24/92
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-12-22 01:51:54 +01:00
|
|
|
|
ProcReleaseLocks(true);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtCommit_Memory
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtCommit_Memory(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* Now that we're "out" of a transaction, have the
|
|
|
|
|
* system allocate things in the top memory context instead
|
|
|
|
|
* of per-transaction contexts.
|
1999-05-13 02:34:57 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-06-28 05:33:33 +02:00
|
|
|
|
MemoryContextSwitchTo(TopMemoryContext);
|
1999-05-13 02:34:57 +02:00
|
|
|
|
|
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* Release all transaction-local memory.
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-07-02 04:28:38 +02:00
|
|
|
|
Assert(TopTransactionContext != NULL);
|
2000-06-28 05:33:33 +02:00
|
|
|
|
MemoryContextDelete(TopTransactionContext);
|
|
|
|
|
TopTransactionContext = NULL;
|
|
|
|
|
TransactionCommandContext = NULL;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AbortTransaction stuff
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* RecordTransactionAbort
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
RecordTransactionAbort(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
2000-11-30 09:46:26 +01:00
|
|
|
|
TransactionId xid = GetCurrentTransactionId();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
2000-12-07 11:03:46 +01:00
|
|
|
|
if (MyLastRecPtr.xrecoff != 0 && !TransactionIdDidCommit(xid))
|
2000-10-20 13:01:21 +02:00
|
|
|
|
{
|
2000-12-28 14:00:29 +01:00
|
|
|
|
XLogRecData rdata;
|
2000-10-20 13:01:21 +02:00
|
|
|
|
xl_xact_abort xlrec;
|
|
|
|
|
XLogRecPtr recptr;
|
|
|
|
|
|
|
|
|
|
xlrec.xtime = time(NULL);
|
2000-12-28 14:00:29 +01:00
|
|
|
|
rdata.buffer = InvalidBuffer;
|
|
|
|
|
rdata.data = (char *)(&xlrec);
|
|
|
|
|
rdata.len = SizeOfXactAbort;
|
|
|
|
|
rdata.next = NULL;
|
|
|
|
|
|
2000-12-03 11:27:29 +01:00
|
|
|
|
START_CRIT_CODE;
|
2000-12-28 14:00:29 +01:00
|
|
|
|
recptr = XLogInsert(RM_XACT_ID, XLOG_XACT_ABORT, &rdata);
|
2000-11-05 23:50:21 +01:00
|
|
|
|
|
2000-11-30 09:46:26 +01:00
|
|
|
|
TransactionIdAbort(xid);
|
2000-11-05 23:50:21 +01:00
|
|
|
|
MyProc->logRec.xrecoff = 0;
|
2000-12-03 11:27:29 +01:00
|
|
|
|
END_CRIT_CODE;
|
2000-10-20 13:01:21 +02:00
|
|
|
|
}
|
|
|
|
|
|
2000-04-09 06:43:20 +02:00
|
|
|
|
/*
|
|
|
|
|
* Tell bufmgr and smgr to release resources.
|
|
|
|
|
*/
|
|
|
|
|
ResetBufferPool(false); /* false -> is abort */
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtAbort_Cache
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtAbort_Cache(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1999-09-04 20:42:15 +02:00
|
|
|
|
RelationCacheAbort();
|
1999-09-24 02:25:33 +02:00
|
|
|
|
RegisterInvalid(false);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtAbort_Locks
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtAbort_Locks(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* XXX What if ProcReleaseLocks() fails? (race condition?)
|
|
|
|
|
*
|
|
|
|
|
* Then you're up a creek without a paddle! -mer
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-12-22 01:51:54 +01:00
|
|
|
|
ProcReleaseLocks(false);
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AtAbort_Memory
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtAbort_Memory(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
2000-06-28 05:33:33 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* Make sure we are in a valid context (not a child of
|
2000-07-02 04:28:38 +02:00
|
|
|
|
* TransactionCommandContext...). Note that it is possible
|
|
|
|
|
* for this code to be called when we aren't in a transaction
|
|
|
|
|
* at all; go directly to TopMemoryContext in that case.
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-07-02 04:28:38 +02:00
|
|
|
|
if (TransactionCommandContext != NULL)
|
|
|
|
|
{
|
|
|
|
|
MemoryContextSwitchTo(TransactionCommandContext);
|
1999-05-13 02:34:57 +02:00
|
|
|
|
|
2000-07-02 04:28:38 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* We do not want to destroy transaction contexts yet,
|
|
|
|
|
* but it should be OK to delete any command-local memory.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
MemoryContextResetAndDeleteChildren(TransactionCommandContext);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
MemoryContextSwitchTo(TopMemoryContext);
|
|
|
|
|
}
|
2000-06-28 05:33:33 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
|
|
|
* CleanupTransaction stuff
|
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
1999-05-13 02:34:57 +02:00
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
/* --------------------------------
|
|
|
|
|
* AtCleanup_Memory
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AtCleanup_Memory(void)
|
2000-06-28 05:33:33 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
1999-05-13 02:34:57 +02:00
|
|
|
|
* Now that we're "out" of a transaction, have the
|
|
|
|
|
* system allocate things in the top memory context instead
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* of per-transaction contexts.
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
MemoryContextSwitchTo(TopMemoryContext);
|
2000-06-28 05:33:33 +02:00
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Release all transaction-local memory.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-07-02 04:28:38 +02:00
|
|
|
|
if (TopTransactionContext != NULL)
|
|
|
|
|
MemoryContextDelete(TopTransactionContext);
|
2000-06-28 05:33:33 +02:00
|
|
|
|
TopTransactionContext = NULL;
|
|
|
|
|
TransactionCommandContext = NULL;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------------------------------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* interface routines
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* StartTransaction
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
StartTransaction(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
1998-12-16 12:53:55 +01:00
|
|
|
|
FreeXactSnapshot();
|
1998-12-18 10:10:39 +01:00
|
|
|
|
XactIsoLevel = DefaultXactIsoLevel;
|
1998-12-16 12:53:55 +01:00
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* Check the current transaction state. If the transaction system
|
|
|
|
|
* is switched off, or if we're already in a transaction, do nothing.
|
|
|
|
|
* We're already in a transaction when the monitor sends a null
|
|
|
|
|
* command to the backend to flush the comm channel. This is a
|
|
|
|
|
* hacky fix to a communications problem, and we keep having to
|
|
|
|
|
* deal with it here. We should fix the comm channel code. mao 080891
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state == TRANS_DISABLED || s->state == TRANS_INPROGRESS)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* set the current transaction state information
|
|
|
|
|
* appropriately during start processing
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->state = TRANS_START;
|
|
|
|
|
|
2000-02-18 10:30:20 +01:00
|
|
|
|
SetReindexProcessing(false);
|
2000-06-28 05:33:33 +02:00
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* generate a new transaction id
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
GetNewTransactionId(&(s->transactionIdData));
|
|
|
|
|
|
1998-12-15 13:47:01 +01:00
|
|
|
|
XactLockTableInsert(s->transactionIdData);
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* initialize current transaction state fields
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->commandId = FirstCommandId;
|
|
|
|
|
s->scanCommandId = FirstCommandId;
|
|
|
|
|
s->startTime = GetCurrentAbsoluteTime();
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* initialize the various transaction subsystems
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-06-28 05:33:33 +02:00
|
|
|
|
AtStart_Memory();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtStart_Cache();
|
|
|
|
|
AtStart_Locks();
|
|
|
|
|
|
1999-09-29 18:06:40 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* Tell the trigger manager to we're starting a transaction
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
DeferredTriggerBeginXact();
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* done with start processing, set current transaction
|
|
|
|
|
* state to "in progress"
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->state = TRANS_INPROGRESS;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
2000-06-09 00:38:00 +02:00
|
|
|
|
#ifdef NOT_USED
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ---------------
|
|
|
|
|
* Tell me if we are currently in progress
|
|
|
|
|
* ---------------
|
|
|
|
|
*/
|
|
|
|
|
bool
|
2000-10-24 22:06:39 +02:00
|
|
|
|
CurrentXactInProgress(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1998-09-01 05:29:17 +02:00
|
|
|
|
return CurrentTransactionState->state == TRANS_INPROGRESS;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
2000-06-09 00:38:00 +02:00
|
|
|
|
#endif
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* CommitTransaction
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
CommitTransaction(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (s->state != TRANS_INPROGRESS)
|
|
|
|
|
elog(NOTICE, "CommitTransaction and not in in-progress state ");
|
|
|
|
|
|
1999-09-29 18:06:40 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* Tell the trigger manager that this transaction is about to be
|
|
|
|
|
* committed. He'll invoke all trigger deferred until XACT before
|
2000-04-12 19:17:23 +02:00
|
|
|
|
* we really start on committing the transaction.
|
1999-09-29 18:06:40 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
DeferredTriggerEndXact();
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* set the current transaction state information
|
|
|
|
|
* appropriately during the abort processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->state = TRANS_COMMIT;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* do commit processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1998-07-21 06:17:30 +02:00
|
|
|
|
|
1998-09-01 06:40:42 +02:00
|
|
|
|
/* handle commit for large objects [ PA, 7/17/98 ] */
|
1999-06-01 00:53:59 +02:00
|
|
|
|
lo_commit(true);
|
1998-07-21 06:17:30 +02:00
|
|
|
|
|
1998-10-06 04:40:09 +02:00
|
|
|
|
/* NOTIFY commit must also come before lower-level cleanup */
|
|
|
|
|
AtCommit_Notify();
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
CloseSequences();
|
|
|
|
|
AtEOXact_portals();
|
|
|
|
|
RecordTransactionCommit();
|
1999-06-03 15:33:13 +02:00
|
|
|
|
|
|
|
|
|
/*
|
2000-04-12 19:17:23 +02:00
|
|
|
|
* Let others know about no transaction in progress by me. Note that
|
|
|
|
|
* this must be done _before_ releasing locks we hold and
|
|
|
|
|
* SpinAcquire(SInvalLock) is required: UPDATE with xid 0 is blocked
|
|
|
|
|
* by xid 1' UPDATE, xid 1 is doing commit while xid 2 gets snapshot -
|
|
|
|
|
* if xid 2' GetSnapshotData sees xid 1 as running then it must see
|
|
|
|
|
* xid 0 as running as well or it will see two tuple versions - one
|
|
|
|
|
* deleted by xid 1 and one inserted by xid 0.
|
1999-06-03 15:33:13 +02:00
|
|
|
|
*/
|
|
|
|
|
if (MyProc != (PROC *) NULL)
|
|
|
|
|
{
|
1999-09-24 02:25:33 +02:00
|
|
|
|
/* Lock SInvalLock because that's what GetSnapshotData uses. */
|
|
|
|
|
SpinAcquire(SInvalLock);
|
1999-06-03 15:33:13 +02:00
|
|
|
|
MyProc->xid = InvalidTransactionId;
|
|
|
|
|
MyProc->xmin = InvalidTransactionId;
|
1999-09-24 02:25:33 +02:00
|
|
|
|
SpinRelease(SInvalLock);
|
1999-06-03 15:33:13 +02:00
|
|
|
|
}
|
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
RelationPurgeLocalRelation(true);
|
2000-11-08 23:10:03 +01:00
|
|
|
|
AtEOXact_temp_relations(true);
|
|
|
|
|
smgrDoPendingDeletes(true);
|
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
AtEOXact_SPI();
|
1999-08-08 22:12:52 +02:00
|
|
|
|
AtEOXact_nbtree();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtCommit_Cache();
|
|
|
|
|
AtCommit_Locks();
|
2000-11-16 23:30:52 +01:00
|
|
|
|
AtEOXact_CatCache(true);
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtCommit_Memory();
|
1999-05-09 02:52:08 +02:00
|
|
|
|
AtEOXact_Files();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
SharedBufferChanged = false; /* safest place to do it */
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* done with commit processing, set current transaction
|
|
|
|
|
* state back to default
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->state = TRANS_DEFAULT;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AbortTransaction
|
|
|
|
|
*
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AbortTransaction(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Let others to know about no transaction in progress - vadim
|
|
|
|
|
* 11/26/96
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (MyProc != (PROC *) NULL)
|
1999-03-28 22:32:42 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
MyProc->xid = InvalidTransactionId;
|
1999-03-28 22:32:42 +02:00
|
|
|
|
MyProc->xmin = InvalidTransactionId;
|
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
2000-12-18 01:44:50 +01:00
|
|
|
|
/*
|
|
|
|
|
* Release any spinlocks or buffer context locks we might be holding
|
|
|
|
|
* as quickly as possible. (Real locks, however, must be held till
|
|
|
|
|
* we finish aborting.) Releasing spinlocks is critical since we
|
|
|
|
|
* might try to grab them again while cleaning up!
|
|
|
|
|
*/
|
|
|
|
|
ProcReleaseSpins(NULL);
|
|
|
|
|
UnlockBuffers();
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (s->state != TRANS_INPROGRESS)
|
2000-06-28 05:33:33 +02:00
|
|
|
|
elog(NOTICE, "AbortTransaction and not in in-progress state");
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* set the current transaction state information
|
|
|
|
|
* appropriately during the abort processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->state = TRANS_ABORT;
|
|
|
|
|
|
2000-12-18 01:44:50 +01:00
|
|
|
|
/*
|
|
|
|
|
* Reset user id which might have been changed transiently
|
|
|
|
|
*/
|
|
|
|
|
SetUserId(GetSessionUserId());
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* do abort processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-12-18 01:44:50 +01:00
|
|
|
|
DeferredTriggerAbortXact();
|
1999-06-01 00:53:59 +02:00
|
|
|
|
lo_commit(false); /* 'false' means it's abort */
|
1998-10-06 04:40:09 +02:00
|
|
|
|
AtAbort_Notify();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
CloseSequences();
|
|
|
|
|
AtEOXact_portals();
|
|
|
|
|
RecordTransactionAbort();
|
2000-11-08 23:10:03 +01:00
|
|
|
|
|
1997-09-07 07:04:48 +02:00
|
|
|
|
RelationPurgeLocalRelation(false);
|
2000-11-08 23:10:03 +01:00
|
|
|
|
AtEOXact_temp_relations(false);
|
|
|
|
|
smgrDoPendingDeletes(false);
|
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
AtEOXact_SPI();
|
1999-08-08 22:12:52 +02:00
|
|
|
|
AtEOXact_nbtree();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtAbort_Cache();
|
2000-11-16 23:30:52 +01:00
|
|
|
|
AtEOXact_CatCache(false);
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AtAbort_Memory();
|
1999-05-09 02:52:08 +02:00
|
|
|
|
AtEOXact_Files();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
2000-10-20 13:01:21 +02:00
|
|
|
|
/* Here we'll rollback xaction changes */
|
2000-10-21 17:43:36 +02:00
|
|
|
|
MyLastRecPtr.xrecoff = 0;
|
2000-10-20 13:01:21 +02:00
|
|
|
|
|
|
|
|
|
AtAbort_Locks();
|
|
|
|
|
|
2000-06-28 05:33:33 +02:00
|
|
|
|
SharedBufferChanged = false; /* safest place to do it */
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* State remains TRANS_ABORT until CleanupTransaction().
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
|
|
|
|
* CleanupTransaction
|
|
|
|
|
*
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
static void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
CleanupTransaction(void)
|
2000-06-28 05:33:33 +02:00
|
|
|
|
{
|
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* State should still be TRANS_ABORT from AbortTransaction().
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
if (s->state != TRANS_ABORT)
|
|
|
|
|
elog(FATAL, "CleanupTransaction and not in abort state");
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* do abort cleanup processing
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
AtCleanup_Memory();
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* done with abort processing, set current transaction
|
|
|
|
|
* state back to default
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->state = TRANS_DEFAULT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
|
|
|
|
* StartTransactionCommand
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
StartTransactionCommand(void)
|
1997-09-07 07:04:48 +02:00
|
|
|
|
{
|
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
switch (s->blockState)
|
|
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* if we aren't in a transaction block, we
|
|
|
|
|
* just do our usual start transaction.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_DEFAULT:
|
|
|
|
|
StartTransaction();
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* We should never experience this -- if we do it
|
|
|
|
|
* means the BEGIN state was not changed in the previous
|
|
|
|
|
* CommitTransactionCommand(). If we get it, we print
|
|
|
|
|
* a warning and change to the in-progress state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_BEGIN:
|
|
|
|
|
elog(NOTICE, "StartTransactionCommand: unexpected TBLOCK_BEGIN");
|
|
|
|
|
s->blockState = TBLOCK_INPROGRESS;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This is the case when are somewhere in a transaction
|
|
|
|
|
* block and about to start a new command. For now we
|
|
|
|
|
* do nothing but someday we may do command-local resource
|
|
|
|
|
* initialization.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_INPROGRESS:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
1999-05-25 18:15:34 +02:00
|
|
|
|
* As with BEGIN, we should never experience this
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* if we do it means the END state was not changed in the
|
|
|
|
|
* previous CommitTransactionCommand(). If we get it, we
|
|
|
|
|
* print a warning, commit the transaction, start a new
|
|
|
|
|
* transaction and change to the default state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_END:
|
|
|
|
|
elog(NOTICE, "StartTransactionCommand: unexpected TBLOCK_END");
|
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
|
|
|
|
CommitTransaction();
|
|
|
|
|
StartTransaction();
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here we are in the middle of a transaction block but
|
|
|
|
|
* one of the commands caused an abort so we do nothing
|
|
|
|
|
* but remain in the abort state. Eventually we will get
|
|
|
|
|
* to the "END TRANSACTION" which will set things straight.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ABORT:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This means we somehow aborted and the last call to
|
|
|
|
|
* CommitTransactionCommand() didn't clear the state so
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* we remain in the ENDABORT state and maybe next time
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* we get to CommitTransactionCommand() the state will
|
|
|
|
|
* get reset to default.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ENDABORT:
|
|
|
|
|
elog(NOTICE, "StartTransactionCommand: unexpected TBLOCK_ENDABORT");
|
|
|
|
|
break;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
2000-06-28 05:33:33 +02:00
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* We must switch to TransactionCommandContext before returning.
|
|
|
|
|
* This is already done if we called StartTransaction, otherwise not.
|
|
|
|
|
*/
|
|
|
|
|
Assert(TransactionCommandContext != NULL);
|
|
|
|
|
MemoryContextSwitchTo(TransactionCommandContext);
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
|
|
|
|
* CommitTransactionCommand
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
CommitTransactionCommand(void)
|
1997-09-07 07:04:48 +02:00
|
|
|
|
{
|
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
switch (s->blockState)
|
|
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* if we aren't in a transaction block, we
|
|
|
|
|
* just do our usual transaction commit
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_DEFAULT:
|
|
|
|
|
CommitTransaction();
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This is the case right after we get a "BEGIN TRANSACTION"
|
|
|
|
|
* command, but the user hasn't done anything else yet, so
|
|
|
|
|
* we change to the "transaction block in progress" state
|
|
|
|
|
* and return.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_BEGIN:
|
|
|
|
|
s->blockState = TBLOCK_INPROGRESS;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This is the case when we have finished executing a command
|
|
|
|
|
* someplace within a transaction block. We increment the
|
|
|
|
|
* command counter and return. Someday we may free resources
|
|
|
|
|
* local to the command.
|
|
|
|
|
*
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* That someday is today, at least for memory allocated in
|
|
|
|
|
* TransactionCommandContext.
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* - vadim 03/25/97
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_INPROGRESS:
|
|
|
|
|
CommandCounterIncrement();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
MemoryContextResetAndDeleteChildren(TransactionCommandContext);
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This is the case when we just got the "END TRANSACTION"
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* statement, so we commit the transaction and go back to
|
|
|
|
|
* the default state.
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_END:
|
|
|
|
|
CommitTransaction();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here we are in the middle of a transaction block but
|
|
|
|
|
* one of the commands caused an abort so we do nothing
|
|
|
|
|
* but remain in the abort state. Eventually we will get
|
|
|
|
|
* to the "END TRANSACTION" which will set things straight.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ABORT:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here we were in an aborted transaction block which
|
|
|
|
|
* just processed the "END TRANSACTION" command from the
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* user, so clean up and return to the default state.
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ENDABORT:
|
2000-06-28 05:33:33 +02:00
|
|
|
|
CleanupTransaction();
|
1997-09-08 04:41:22 +02:00
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
|
|
|
|
break;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AbortCurrentTransaction
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AbortCurrentTransaction(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
switch (s->blockState)
|
|
|
|
|
{
|
1997-09-08 04:41:22 +02:00
|
|
|
|
/* ----------------
|
|
|
|
|
* if we aren't in a transaction block, we
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* just do the basic abort & cleanup transaction.
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_DEFAULT:
|
|
|
|
|
AbortTransaction();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
CleanupTransaction();
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* If we are in the TBLOCK_BEGIN it means something
|
|
|
|
|
* screwed up right after reading "BEGIN TRANSACTION"
|
|
|
|
|
* so we enter the abort state. Eventually an "END
|
|
|
|
|
* TRANSACTION" will fix things.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_BEGIN:
|
|
|
|
|
s->blockState = TBLOCK_ABORT;
|
|
|
|
|
AbortTransaction();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
/* CleanupTransaction happens when we exit TBLOCK_ABORT */
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* This is the case when are somewhere in a transaction
|
|
|
|
|
* block which aborted so we abort the transaction and
|
|
|
|
|
* set the ABORT state. Eventually an "END TRANSACTION"
|
|
|
|
|
* will fix things and restore us to a normal state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_INPROGRESS:
|
|
|
|
|
s->blockState = TBLOCK_ABORT;
|
|
|
|
|
AbortTransaction();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
/* CleanupTransaction happens when we exit TBLOCK_ABORT */
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here, the system was fouled up just after the
|
|
|
|
|
* user wanted to end the transaction block so we
|
|
|
|
|
* abort the transaction and put us back into the
|
|
|
|
|
* default state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_END:
|
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
|
|
|
|
AbortTransaction();
|
2000-06-28 05:33:33 +02:00
|
|
|
|
CleanupTransaction();
|
1997-09-08 04:41:22 +02:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here, we are already in an aborted transaction
|
|
|
|
|
* state and are waiting for an "END TRANSACTION" to
|
|
|
|
|
* come along and lo and behold, we abort again!
|
|
|
|
|
* So we just remain in the abort state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ABORT:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* ----------------
|
|
|
|
|
* Here we were in an aborted transaction block which
|
|
|
|
|
* just processed the "END TRANSACTION" command but somehow
|
|
|
|
|
* aborted again.. since we must have done the abort
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* processing, we clean up and return to the default state.
|
1997-09-08 04:41:22 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
case TBLOCK_ENDABORT:
|
2000-06-28 05:33:33 +02:00
|
|
|
|
CleanupTransaction();
|
1997-09-08 04:41:22 +02:00
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
|
|
|
|
break;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
|
|
|
* transaction block support
|
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
/* --------------------------------
|
|
|
|
|
* BeginTransactionBlock
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
|
|
|
|
BeginTransactionBlock(void)
|
|
|
|
|
{
|
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (s->blockState != TBLOCK_DEFAULT)
|
2000-01-29 17:58:54 +01:00
|
|
|
|
elog(NOTICE, "BEGIN: already a transaction in progress");
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* set the current transaction block state information
|
|
|
|
|
* appropriately during begin processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->blockState = TBLOCK_BEGIN;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* do begin processing
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* done with begin processing, set block state to inprogress
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->blockState = TBLOCK_INPROGRESS;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* EndTransactionBlock
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
1996-11-10 04:06:38 +01:00
|
|
|
|
EndTransactionBlock(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_INPROGRESS)
|
|
|
|
|
{
|
|
|
|
|
/* ----------------
|
|
|
|
|
* here we are in a transaction block which should commit
|
|
|
|
|
* when we get to the upcoming CommitTransactionCommand()
|
|
|
|
|
* so we set the state to "END". CommitTransactionCommand()
|
|
|
|
|
* will recognize this and commit the transaction and return
|
|
|
|
|
* us to the default state
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->blockState = TBLOCK_END;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_ABORT)
|
|
|
|
|
{
|
|
|
|
|
/* ----------------
|
|
|
|
|
* here, we are in a transaction block which aborted
|
|
|
|
|
* and since the AbortTransaction() was already done,
|
|
|
|
|
* we do whatever is needed and change to the special
|
|
|
|
|
* "END ABORT" state. The upcoming CommitTransactionCommand()
|
|
|
|
|
* will recognise this and then put us back in the default
|
|
|
|
|
* state.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* here, the user issued COMMIT when not inside a transaction.
|
|
|
|
|
* Issue a notice and go to abort state. The upcoming call to
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* CommitTransactionCommand() will then put us back into the
|
|
|
|
|
* default state.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-01-29 17:58:54 +01:00
|
|
|
|
elog(NOTICE, "COMMIT: no transaction in progress");
|
2000-06-28 05:33:33 +02:00
|
|
|
|
AbortTransaction();
|
1996-07-09 08:22:35 +02:00
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* AbortTransactionBlock
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
1997-08-19 23:40:56 +02:00
|
|
|
|
#ifdef NOT_USED
|
|
|
|
|
static void
|
1996-11-10 04:06:38 +01:00
|
|
|
|
AbortTransactionBlock(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_INPROGRESS)
|
|
|
|
|
{
|
|
|
|
|
/* ----------------
|
|
|
|
|
* here we were inside a transaction block something
|
|
|
|
|
* screwed up inside the system so we enter the abort state,
|
|
|
|
|
* do the abort processing and then return.
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* We remain in the abort state until we see an
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* END TRANSACTION command.
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->blockState = TBLOCK_ABORT;
|
|
|
|
|
AbortTransaction();
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* here, the user issued ABORT when not inside a transaction.
|
|
|
|
|
* Issue a notice and go to abort state. The upcoming call to
|
|
|
|
|
* CommitTransactionCommand() will then put us back into the
|
|
|
|
|
* default state.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-06-28 05:33:33 +02:00
|
|
|
|
elog(NOTICE, "ROLLBACK: no transaction in progress");
|
1996-07-09 08:22:35 +02:00
|
|
|
|
AbortTransaction();
|
1997-09-07 07:04:48 +02:00
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1997-08-19 23:40:56 +02:00
|
|
|
|
#endif
|
1996-07-09 08:22:35 +02:00
|
|
|
|
|
|
|
|
|
/* --------------------------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* UserAbortTransactionBlock
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
UserAbortTransactionBlock(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
1997-09-07 07:04:48 +02:00
|
|
|
|
* check the current transaction state
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->state == TRANS_DISABLED)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* if the transaction has already been automatically aborted with an
|
|
|
|
|
* error, and the user subsequently types 'abort', allow it. (the
|
|
|
|
|
* behavior is the same as if they had typed 'end'.)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
if (s->blockState == TBLOCK_ABORT)
|
|
|
|
|
{
|
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_INPROGRESS)
|
|
|
|
|
{
|
|
|
|
|
/* ----------------
|
|
|
|
|
* here we were inside a transaction block and we
|
|
|
|
|
* got an abort command from the user, so we move to
|
|
|
|
|
* the abort state, do the abort processing and
|
|
|
|
|
* then change to the ENDABORT state so we will end up
|
|
|
|
|
* in the default state after the upcoming
|
|
|
|
|
* CommitTransactionCommand().
|
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
|
|
|
|
s->blockState = TBLOCK_ABORT;
|
|
|
|
|
AbortTransaction();
|
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
/* ----------------
|
2000-06-28 05:33:33 +02:00
|
|
|
|
* here, the user issued ABORT when not inside a transaction.
|
|
|
|
|
* Issue a notice and go to abort state. The upcoming call to
|
|
|
|
|
* CommitTransactionCommand() will then put us back into the
|
|
|
|
|
* default state.
|
1996-07-09 08:22:35 +02:00
|
|
|
|
* ----------------
|
|
|
|
|
*/
|
2000-01-29 17:58:54 +01:00
|
|
|
|
elog(NOTICE, "ROLLBACK: no transaction in progress");
|
1997-09-07 07:04:48 +02:00
|
|
|
|
AbortTransaction();
|
1996-07-09 08:22:35 +02:00
|
|
|
|
s->blockState = TBLOCK_ENDABORT;
|
|
|
|
|
}
|
|
|
|
|
|
1998-10-06 04:40:09 +02:00
|
|
|
|
/* --------------------------------
|
|
|
|
|
* AbortOutOfAnyTransaction
|
|
|
|
|
*
|
|
|
|
|
* This routine is provided for error recovery purposes. It aborts any
|
|
|
|
|
* active transaction or transaction block, leaving the system in a known
|
|
|
|
|
* idle state.
|
|
|
|
|
* --------------------------------
|
|
|
|
|
*/
|
|
|
|
|
void
|
2000-10-24 22:06:39 +02:00
|
|
|
|
AbortOutOfAnyTransaction(void)
|
1998-10-06 04:40:09 +02:00
|
|
|
|
{
|
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Get out of any low-level transaction
|
|
|
|
|
*/
|
2000-10-24 22:06:39 +02:00
|
|
|
|
switch (s->state)
|
2000-06-28 05:33:33 +02:00
|
|
|
|
{
|
2000-10-24 22:06:39 +02:00
|
|
|
|
case TRANS_START:
|
|
|
|
|
case TRANS_INPROGRESS:
|
|
|
|
|
case TRANS_COMMIT:
|
|
|
|
|
/* In a transaction, so clean up */
|
|
|
|
|
AbortTransaction();
|
|
|
|
|
CleanupTransaction();
|
|
|
|
|
break;
|
|
|
|
|
case TRANS_ABORT:
|
|
|
|
|
/* AbortTransaction already done, still need Cleanup */
|
|
|
|
|
CleanupTransaction();
|
|
|
|
|
break;
|
|
|
|
|
case TRANS_DEFAULT:
|
|
|
|
|
case TRANS_DISABLED:
|
|
|
|
|
/* Not in a transaction, do nothing */
|
|
|
|
|
break;
|
2000-06-28 05:33:33 +02:00
|
|
|
|
}
|
1999-05-25 18:15:34 +02:00
|
|
|
|
|
1998-10-06 04:40:09 +02:00
|
|
|
|
/*
|
|
|
|
|
* Now reset the high-level state
|
|
|
|
|
*/
|
|
|
|
|
s->blockState = TBLOCK_DEFAULT;
|
|
|
|
|
}
|
|
|
|
|
|
1996-07-09 08:22:35 +02:00
|
|
|
|
bool
|
2000-10-24 22:06:39 +02:00
|
|
|
|
IsTransactionBlock(void)
|
1996-07-09 08:22:35 +02:00
|
|
|
|
{
|
1997-09-07 07:04:48 +02:00
|
|
|
|
TransactionState s = CurrentTransactionState;
|
|
|
|
|
|
|
|
|
|
if (s->blockState == TBLOCK_INPROGRESS
|
1999-09-05 19:12:34 +02:00
|
|
|
|
|| s->blockState == TBLOCK_ABORT
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|| s->blockState == TBLOCK_ENDABORT)
|
1998-09-01 05:29:17 +02:00
|
|
|
|
return true;
|
1997-09-07 07:04:48 +02:00
|
|
|
|
|
1998-09-01 05:29:17 +02:00
|
|
|
|
return false;
|
1996-07-09 08:22:35 +02:00
|
|
|
|
}
|
2000-10-20 13:01:21 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
xact_redo(XLogRecPtr lsn, XLogRecord *record)
|
|
|
|
|
{
|
|
|
|
|
uint8 info = record->xl_info & ~XLR_INFO_MASK;
|
|
|
|
|
|
|
|
|
|
if (info == XLOG_XACT_COMMIT)
|
|
|
|
|
{
|
|
|
|
|
xl_xact_commit *xlrec = (xl_xact_commit*) XLogRecGetData(record);
|
|
|
|
|
|
2000-10-24 11:56:23 +02:00
|
|
|
|
TransactionIdCommit(record->xl_xid);
|
2000-11-30 09:46:26 +01:00
|
|
|
|
/* SHOULD REMOVE FILES OF ALL DROPPED RELATIONS */
|
2000-10-20 13:01:21 +02:00
|
|
|
|
}
|
|
|
|
|
else if (info == XLOG_XACT_ABORT)
|
|
|
|
|
{
|
2000-10-24 11:56:23 +02:00
|
|
|
|
TransactionIdAbort(record->xl_xid);
|
2000-10-20 13:01:21 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
elog(STOP, "xact_redo: unknown op code %u", info);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
xact_undo(XLogRecPtr lsn, XLogRecord *record)
|
|
|
|
|
{
|
|
|
|
|
uint8 info = record->xl_info & ~XLR_INFO_MASK;
|
|
|
|
|
|
|
|
|
|
if (info == XLOG_XACT_COMMIT) /* shouldn't be called by XLOG */
|
|
|
|
|
elog(STOP, "xact_undo: can't undo committed xaction");
|
|
|
|
|
else if (info != XLOG_XACT_ABORT)
|
|
|
|
|
elog(STOP, "xact_redo: unknown op code %u", info);
|
|
|
|
|
}
|
2000-10-21 17:43:36 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
xact_desc(char *buf, uint8 xl_info, char* rec)
|
|
|
|
|
{
|
|
|
|
|
uint8 info = xl_info & ~XLR_INFO_MASK;
|
|
|
|
|
|
|
|
|
|
if (info == XLOG_XACT_COMMIT)
|
|
|
|
|
{
|
|
|
|
|
xl_xact_commit *xlrec = (xl_xact_commit*) rec;
|
|
|
|
|
struct tm *tm = localtime(&xlrec->xtime);
|
|
|
|
|
|
|
|
|
|
sprintf(buf + strlen(buf), "commit: %04u-%02u-%02u %02u:%02u:%02u",
|
|
|
|
|
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
|
|
|
|
|
tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|
|
|
|
}
|
|
|
|
|
else if (info == XLOG_XACT_ABORT)
|
|
|
|
|
{
|
|
|
|
|
xl_xact_abort *xlrec = (xl_xact_abort*) rec;
|
|
|
|
|
struct tm *tm = localtime(&xlrec->xtime);
|
|
|
|
|
|
|
|
|
|
sprintf(buf + strlen(buf), "abort: %04u-%02u-%02u %02u:%02u:%02u",
|
|
|
|
|
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
|
|
|
|
|
tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
strcat(buf, "UNKNOWN");
|
|
|
|
|
}
|
2000-10-20 13:01:21 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
XactPushRollback(void (*func) (void *), void* data)
|
|
|
|
|
{
|
2000-10-29 19:33:41 +01:00
|
|
|
|
#ifdef XLOG_II
|
2000-10-20 13:01:21 +02:00
|
|
|
|
if (_RollbackFunc != NULL)
|
|
|
|
|
elog(STOP, "XactPushRollback: already installed");
|
2000-10-29 19:33:41 +01:00
|
|
|
|
#endif
|
2000-10-20 13:01:21 +02:00
|
|
|
|
|
|
|
|
|
_RollbackFunc = func;
|
|
|
|
|
_RollbackData = data;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
XactPopRollback(void)
|
|
|
|
|
{
|
|
|
|
|
_RollbackFunc = NULL;
|
|
|
|
|
}
|