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2ff501590b
Also performed an initial run through of upgrading our Copyright date to extend to 2005 ... first run here was very simple ... change everything where: grep 1996-2004 && the word 'Copyright' ... scanned through the generated list with 'less' first, and after, to make sure that I only picked up the right entries ...
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* tuplestore.h
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* Generalized routines for temporary tuple storage.
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*
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* This module handles temporary storage of tuples for purposes such
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* as Materialize nodes, hashjoin batch files, etc. It is essentially
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* a dumbed-down version of tuplesort.c; it does no sorting of tuples
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* but can only store and regurgitate a sequence of tuples. However,
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* because no sort is required, it is allowed to start reading the sequence
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* before it has all been written. This is particularly useful for cursors,
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* because it allows random access within the already-scanned portion of
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* a query without having to process the underlying scan to completion.
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* A temporary file is used to handle the data if it exceeds the
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* space limit specified by the caller.
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/tuplestore.h,v 1.16 2004/12/31 22:03:46 pgsql Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef TUPLESTORE_H
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#define TUPLESTORE_H
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#include "access/htup.h"
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/* Tuplestorestate is an opaque type whose details are not known outside
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* tuplestore.c.
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*/
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typedef struct Tuplestorestate Tuplestorestate;
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/*
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* Currently we only need to store HeapTuples, but it would be easy
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* to support the same behavior for IndexTuples and/or bare Datums.
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*/
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extern Tuplestorestate *tuplestore_begin_heap(bool randomAccess,
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bool interXact,
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int maxKBytes);
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extern void tuplestore_puttuple(Tuplestorestate *state, void *tuple);
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/* tuplestore_donestoring() used to be required, but is no longer used */
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#define tuplestore_donestoring(state) ((void) 0)
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/* backwards scan is only allowed if randomAccess was specified 'true' */
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extern void *tuplestore_gettuple(Tuplestorestate *state, bool forward,
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bool *should_free);
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#define tuplestore_getheaptuple(state, forward, should_free) \
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((HeapTuple) tuplestore_gettuple(state, forward, should_free))
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extern void tuplestore_end(Tuplestorestate *state);
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extern bool tuplestore_ateof(Tuplestorestate *state);
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extern void tuplestore_rescan(Tuplestorestate *state);
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extern void tuplestore_markpos(Tuplestorestate *state);
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extern void tuplestore_restorepos(Tuplestorestate *state);
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#endif /* TUPLESTORE_H */
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