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postgresql/src/backend/parser
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Tom Lane 8acdb8bf9c Split CollateClause into separate raw and analyzed node types. 
CollateClause is now used only in raw grammar output, and CollateExpr after
parse analysis.  This is for clarity and to avoid carrying collation names
in post-analysis parse trees: that's both wasteful and possibly misleading,
since the collation's name could be changed while the parsetree still
exists.

Also, clean up assorted infelicities and omissions in processing of the
node type.
 		2011-03-11 16:28:18 -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 Support data-modifying commands (INSERT/UPDATE/DELETE) in WITH. 2011-02-25 18:58:02 -05:00
gram.y Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
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 Per-column collation support 2011-02-08 23:04:18 +02:00
parse_clause.c Support data-modifying commands (INSERT/UPDATE/DELETE) in WITH. 2011-02-25 18:58:02 -05:00
parse_coerce.c Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
parse_cte.c Support data-modifying commands (INSERT/UPDATE/DELETE) in WITH. 2011-02-25 18:58:02 -05:00
parse_expr.c Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
parse_func.c Remove collation information from TypeName, where it does not belong. 2011-03-09 22:39:20 -05:00
parse_node.c Per-column collation support 2011-02-08 23:04:18 +02:00
parse_oper.c Per-column collation support 2011-02-08 23:04:18 +02:00
parse_param.c Per-column collation support 2011-02-08 23:04:18 +02:00
parse_relation.c Remove collation information from TypeName, where it does not belong. 2011-03-09 22:39:20 -05:00
parse_target.c Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
parse_type.c Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
parse_utilcmd.c Split CollateClause into separate raw and analyzed node types. 2011-03-11 16:28:18 -05:00
parser.c Stamp copyrights for year 2011. 2011-01-01 13:18:15 -05:00
scan.l Stamp copyrights for year 2011. 2011-01-01 13:18:15 -05:00
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_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)