postgresql

History

Robert Haas 5f7b58fad8 Generalize concept of temporary relations to "relation persistence". This commit replaces pg_class.relistemp with pg_class.relpersistence; and also modifies the RangeVar node type to carry relpersistence rather than istemp. It also removes removes rd_istemp from RelationData and instead performs the correct computation based on relpersistence. For clarity, we add three new macros: RelationNeedsWAL(), RelationUsesLocalBuffers(), and RelationUsesTempNamespace(), so that we can clarify the purpose of each check that previous depended on rd_istemp. This is intended as infrastructure for the upcoming unlogged tables patch, as well as for future possible work on global temporary tables.		2010-12-13 12:34:26 -05:00
..
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
Makefile	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
README	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
analyze.c	Provide hashing support for arrays.	2010-10-30 21:56:11 -04:00
gram.y	Generalize concept of temporary relations to "relation persistence".	2010-12-13 12:34:26 -05:00
keywords.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
kwlookup.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
parse_agg.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
parse_clause.c	Provide hashing support for arrays.	2010-10-30 21:56:11 -04:00
parse_coerce.c	Improve handling of domains over arrays.	2010-10-21 16:07:17 -04:00
parse_cte.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
parse_expr.c	Refactor typenameTypeId()	2010-10-25 21:44:49 +03:00
parse_func.c	Prevent invoking I/O conversion casts via functional/attribute notation.	2010-11-07 13:03:19 -05:00
parse_node.c	Improve handling of domains over arrays.	2010-10-21 16:07:17 -04:00
parse_oper.c	Provide hashing support for arrays.	2010-10-30 21:56:11 -04:00
parse_param.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
parse_relation.c	Refactor typenameTypeId()	2010-10-25 21:44:49 +03:00
parse_target.c	Improve handling of domains over arrays.	2010-10-21 16:07:17 -04:00
parse_type.c	Refactor typenameTypeId()	2010-10-25 21:44:49 +03:00
parse_utilcmd.c	Generalize concept of temporary relations to "relation persistence".	2010-12-13 12:34:26 -05:00
parser.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
scan.l	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
scansup.c	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00

README

src/backend/parser/README

Parser
======

This directory does more than tokenize and parse SQL queries.  It also
creates Query structures for the various complex queries that are passed
to the optimizer and then executor.

parser.c	things start here
scan.l		break query into tokens
scansup.c	handle escapes in input strings
kwlookup.c	turn keywords into specific tokens
keywords.c	table of standard keywords (passed to kwlookup.c)
gram.y		parse the tokens and produce a "raw" parse tree
analyze.c	top level of parse analysis for optimizable queries
parse_agg.c	handle aggregates, like SUM(col1),  AVG(col2), ...
parse_clause.c	handle clauses like WHERE, ORDER BY, GROUP BY, ...
parse_coerce.c	handle coercing expressions to different data types
parse_cte.c	handle Common Table Expressions (WITH clauses)
parse_expr.c	handle expressions like col, col + 3, x = 3 or x = 4
parse_func.c	handle functions, table.column and column identifiers
parse_node.c	create nodes for various structures
parse_oper.c	handle operators in expressions
parse_param.c	handle Params (for the cases used in the core backend)
parse_relation.c support routines for tables and column handling
parse_target.c	handle the result list of the query
parse_type.c	support routines for data type handling
parse_utilcmd.c	parse analysis for utility commands (done at execution time)