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postgresql/src/backend/parser
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Alvaro Herrera 0d83138974 Rationalize vacuuming options and parameters 
We were involving the parser too much in setting up initial vacuuming
parameters.  This patch moves that responsibility elsewhere to simplify
code, and also to make future additions easier.  To do this, create a
new struct VacuumParams which is filled just prior to vacuum execution,
instead of at parse time; for user-invoked vacuuming this is set up in a
new function ExecVacuum, while autovacuum sets it up by itself.

While at it, add a new member VACOPT_SKIPTOAST to enum VacuumOption,
only set by autovacuum, which is used to disable vacuuming of the toast
table instead of the old do_toast parameter; this relieves the argument
list of vacuum() and some callees a bit.  This partially makes up for
having added more arguments in an effort to avoid having autovacuum from
constructing a VacuumStmt parse node.

Author: Michael Paquier. Some tweaks by Álvaro
Reviewed by: Robert Haas, Stephen Frost, Álvaro Herrera
 		2015-03-18 11:52:33 -03:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
Makefile Refactor flex and bison make rules 2012-10-11 06:57:04 -04:00
README Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
analyze.c Improve representation of PlanRowMark. 2015-03-15 18:41:47 -04:00
check_keywords.pl Update copyright for 2015 2015-01-06 11:43:47 -05:00
gram.y Rationalize vacuuming options and parameters 2015-03-18 11:52:33 -03:00
keywords.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
kwlookup.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_agg.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_clause.c Get rid of multiple applications of transformExpr() to the same tree. 2015-02-22 13:59:09 -05:00
parse_coerce.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_collate.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_cte.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_expr.c Make operator precedence follow the SQL standard more closely. 2015-03-11 13:22:52 -04:00
parse_func.c Suggest to the user the column they may have meant to reference. 2015-03-11 10:44:04 -04:00
parse_node.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_oper.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_param.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_relation.c Require non-NULL pstate for all addRangeTableEntryFor* functions. 2015-03-11 15:26:43 -04:00
parse_target.c Make operator precedence follow the SQL standard more closely. 2015-03-11 13:22:52 -04:00
parse_type.c Update copyright for 2015 2015-01-06 11:43:47 -05:00
parse_utilcmd.c Allow CURRENT/SESSION_USER to be used in certain commands 2015-03-09 15:41:54 -03:00
parser.c Make operator precedence follow the SQL standard more closely. 2015-03-11 13:22:52 -04:00
scan.l Make operator precedence follow the SQL standard more closely. 2015-03-11 13:22:52 -04:00
scansup.c Update copyright for 2015 2015-01-06 11:43:47 -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)