postgresql

mirror of https://git.postgresql.org/git/postgresql.git synced 2024-08-27 10:07:20 +02:00

History

Tom Lane f0811a74b3 Merge the last few variable.c configuration variables into the generic GUC support. It's now possible to set datestyle, timezone, and client_encoding from postgresql.conf and per-database or per-user settings. Also, implement rollback of SET commands that occur in a transaction that later fails. Create a SET LOCAL var = value syntax that sets the variable only for the duration of the current transaction. All per previous discussions in pghackers.		2002-05-17 01:19:19 +00:00
..
.cvsignore	Add .cvsignore file so cvs doesn't complain if you have lex/yacc	1999-03-21 02:43:58 +00:00
analyze.c	First pass at set-returning-functions in FROM, by Joe Conway with	2002-05-12 20:10:05 +00:00
gram.y	Merge the last few variable.c configuration variables into the generic	2002-05-17 01:19:19 +00:00
keywords.c	Retire xlateSqlType/xlateSqlFunc; all type name translations are now	2002-05-03 00:32:19 +00:00
Makefile	Scanner performance improvements	2002-04-20 21:56:15 +00:00
parse_agg.c	Restructure representation of aggregate functions so that they have pg_proc	2002-04-11 20:00:18 +00:00
parse_clause.c	Get rid of long-since-vestigial Iter node type, in favor of adding a	2002-05-12 23:43:04 +00:00
parse_coerce.c	Get rid of long-since-vestigial Iter node type, in favor of adding a	2002-05-12 23:43:04 +00:00
parse_expr.c	Get rid of long-since-vestigial Iter node type, in favor of adding a	2002-05-12 23:43:04 +00:00
parse_func.c	Get rid of long-since-vestigial Iter node type, in favor of adding a	2002-05-12 23:43:04 +00:00
parse_node.c	Get rid of long-since-vestigial Iter node type, in favor of adding a	2002-05-12 23:43:04 +00:00
parse_oper.c	Give left_oper() and right_oper() noError parameters like oper() (the	2002-05-01 19:26:08 +00:00
parse_relation.c	First pass at set-returning-functions in FROM, by Joe Conway with	2002-05-12 20:10:05 +00:00
parse_target.c	Restructure representation of aggregate functions so that they have pg_proc	2002-04-11 20:00:18 +00:00
parse_type.c	First pass at set-returning-functions in FROM, by Joe Conway with	2002-05-12 20:10:05 +00:00
parser.c	Scanner performance improvements	2002-04-20 21:56:15 +00:00
README	cleanup	1998-08-23 14:43:46 +00:00
scan.l	Tweak scanner/grammar interface so that the keyword-as-identifier rules	2002-05-02 18:44:11 +00:00
scansup.c	pgindent run on all C files. Java run to follow. initdb/regression	2001-10-25 05:50:21 +00:00

README

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

parser.c	things start here
scan.l		break query into tokens
scansup.c	handle escapes in input
keywords.c	turn keywords into specific tokens
gram.y		parse the tokens and fill query-type-specific structures
analyze.c	handle post-parse processing for each query type
parse_clause.c	handle clauses like WHERE, ORDER BY, GROUP BY, ...
parse_coerce.c	used for coercing expressions of different types
parse_expr.c	handle expressions like col, col + 3, x = 3 or x = 4
parse_oper.c	handle operations in expressions
parse_agg.c	handle aggregates, like SUM(col1),  AVG(col2), ...
parse_func.c	handle functions, table.column and column identifiers
parse_node.c	create nodes for various structures
parse_target.c	handle the result list of the query
parse_relation.c support routines for tables and column handling
parse_type.c	support routines for type handling