postgresql

History

Tom Lane 5ec6b7f1b8 Improve generated column names for cases involving sub-SELECTs. We'll now use "exists" for EXISTS(SELECT ...), "array" for ARRAY(SELECT ...), or the sub-select's own result column name for a simple expression sub-select. Previously, you usually got "?column?" in such cases. Marti Raudsepp, reviewed by Kyotaro Horiugchi		2011-10-01 14:01:46 -04:00
..
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
Makefile	Add makefile rules to check for backtracking in backend and psql lexers.	2011-08-25 14:44:17 -04:00
README	Revise collation derivation method and expression-tree representation.	2011-03-19 20:30:08 -04:00
analyze.c	Pgindent run before 9.1 beta2.	2011-06-09 14:32:50 -04:00
gram.y	Allow per-column foreign data wrapper options.	2011-08-05 13:24:03 -04:00
keywords.c	Stamp copyrights for year 2011.	2011-01-01 13:18:15 -05:00
kwlookup.c	Stamp copyrights for year 2011.	2011-01-01 13:18:15 -05:00
parse_agg.c	Remove unnecessary #include references, per pgrminclude script.	2011-09-01 10:04:27 -04:00
parse_clause.c	Clean up the #include mess a little.	2011-09-04 01:13:16 -04:00
parse_coerce.c	Remove unnecessary #include references, per pgrminclude script.	2011-09-01 10:04:27 -04:00
parse_collate.c	pgindent run before PG 9.1 beta 1.	2011-04-10 11:42:00 -04:00
parse_cte.c	Make a code-cleanup pass over the collations patch.	2011-04-22 17:43:18 -04:00
parse_expr.c	Remove assumptions that not-equals operators cannot be in any opclass.	2011-07-06 14:53:16 -04:00
parse_func.c	pgindent run before PG 9.1 beta 1.	2011-04-10 11:42:00 -04:00
parse_node.c	Move Timestamp/Interval typedefs and basic macros into datatype/timestamp.h.	2011-09-09 13:23:41 -04:00
parse_oper.c	Remove unnecessary #include references, per pgrminclude script.	2011-09-01 10:04:27 -04:00
parse_param.c	pgindent run before PG 9.1 beta 1.	2011-04-10 11:42:00 -04:00
parse_relation.c	Remove unnecessary #include references, per pgrminclude script.	2011-09-01 10:04:27 -04:00
parse_target.c	Improve generated column names for cases involving sub-SELECTs.	2011-10-01 14:01:46 -04:00
parse_type.c	Try to acquire relation locks in RangeVarGetRelid.	2011-07-08 22:19:30 -04:00
parse_utilcmd.c	Remove unnecessary #include references, per pgrminclude script.	2011-09-01 10:04:27 -04:00
parser.c	Stamp copyrights for year 2011.	2011-01-01 13:18:15 -05:00
scan.l	Add makefile rules to check for backtracking in backend and psql lexers.	2011-08-25 14:44:17 -04:00
scansup.c	Stamp copyrights for year 2011.	2011-01-01 13:18:15 -05:00

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_collate.c	assign collation information in completed expressions
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)