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postgresql/src/backend/parser
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Tom Lane 10a3471bed Add a RESTART (without parameter) option to ALTER SEQUENCE, allowing a 
sequence to be reset to its original starting value.  This requires adding the
original start value to the set of parameters (columns) of a sequence object,
which is a user-visible change with potential compatibility implications;
it also forces initdb.

Also add hopefully-SQL-compatible RESTART/CONTINUE IDENTITY options to
TRUNCATE TABLE.  RESTART IDENTITY executes ALTER SEQUENCE RESTART for all
sequences "owned by" any of the truncated relations.  CONTINUE IDENTITY is
a no-op option.

Zoltan Boszormenyi
 		2008-05-16 23:36:05 +00:00
..
.cvsignore Add .cvsignore file so cvs doesn't complain if you have lex/yacc 1999-03-21 02:43:58 +00:00
Makefile Refactor backend makefiles to remove lots of duplicate code 2008-02-19 10:30:09 +00:00
README Small wording improvements for source code READMEs. 2008-04-09 01:00:46 +00:00
analyze.c Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
gram.y Add a RESTART (without parameter) option to ALTER SEQUENCE, allowing a 2008-05-16 23:36:05 +00:00
keywords.c Add a RESTART (without parameter) option to ALTER SEQUENCE, allowing a 2008-05-16 23:36:05 +00:00
parse_agg.c Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
parse_clause.c Remove ancient restriction that LIMIT/OFFSET can't contain a sub-select. 2008-02-15 17:19:46 +00:00
parse_coerce.c The original implementation of polymorphic aggregates didn't really get the 2008-01-11 18:39:41 +00:00
parse_expr.c Remove typename from A_Const. 2008-04-29 14:59:17 +00:00
parse_func.c Move the HTSU_Result enum definition into snapshot.h, to avoid including 2008-03-26 21:10:39 +00:00
parse_node.c Allow float8, int8, and related datatypes to be passed by value on machines 2008-04-21 00:26:47 +00:00
parse_oper.c Issue explicit error messages for attempts to use "shell" operators in 2008-04-22 01:34:34 +00:00
parse_relation.c Restructure some header files a bit, in particular heapam.h, by removing some 2008-05-12 00:00:54 +00:00
parse_target.c Remove typename from A_Const. 2008-04-29 14:59:17 +00:00
parse_type.c Some minor further cleanup around A_Const. Don't attach a typecast in 2008-04-29 20:44:49 +00:00
parse_utilcmd.c Remove typename from A_Const. 2008-04-29 14:59:17 +00:00
parser.c Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
scan.l Add "%option noinput" to the scanners to avoid compiler warnings. GCC 4.3 2008-05-09 15:36:31 +00:00
scansup.c Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00

README 

$PostgreSQL: pgsql/src/backend/parser/README,v 1.10 2008/04/09 01:00:46 momjian Exp $

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
keywords.c	turn keywords into specific tokens
gram.y		parse the tokens and fill query-type-specific structures
analyze.c	top level of parse analysis for optimizable queries
parse_clause.c	handle clauses like WHERE, ORDER BY, GROUP BY, ...
parse_coerce.c	handle coercing expressions to different data types
parse_expr.c	handle expressions like col, col + 3, x = 3 or x = 4
parse_oper.c	handle operators 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 data type handling
parse_utilcmd.c	parse analysis for utility commands (done at execution time)