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postgresql/src/backend/parser
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Tom Lane a19002d4e5 Adjust collation determination rules as per discussion. 
Remove crude hack that tried to propagate collation through a
function-returning-record, ie, from the function's arguments to individual
fields selected from its result record.  That is just plain inconsistent,
because the function result is composite and cannot have a collation;
and there's no hope of making this kind of action-at-a-distance work
consistently.  Adjust regression test cases that expected this to happen.

Meanwhile, the behavior of casting to a domain with a declared collation
stays the same as it was, since that seemed to be the consensus.
 		2011-04-09 14:40:09 -04:00
..
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
Makefile Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
README Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
analyze.c Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
gram.y Support comments on FOREIGN DATA WRAPPER and SERVER objects. 2011-04-01 11:28:28 -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 Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
parse_clause.c Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
parse_coerce.c Avoid an unnecessary syscache lookup in parse_coerce.c. 2011-04-08 16:11:41 -04:00
parse_collate.c Adjust collation determination rules as per discussion. 2011-04-09 14:40:09 -04:00
parse_cte.c Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
parse_expr.c Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
parse_func.c Adjust collation determination rules as per discussion. 2011-04-09 14:40:09 -04:00
parse_node.c Pass collation to makeConst() instead of looking it up internally. 2011-03-25 20:10:42 -04:00
parse_oper.c Revise collation derivation method and expression-tree representation. 2011-03-19 20:30:08 -04:00
parse_param.c Fix handling of collation in SQL-language functions. 2011-03-24 20:30:23 -04:00
parse_relation.c More collations cleanup, from trawling for missed collation assignments. 2011-03-26 16:35:25 -04:00
parse_target.c Adjust collation determination rules as per discussion. 2011-04-09 14:40:09 -04:00
parse_type.c Avoid an unnecessary syscache lookup in parse_coerce.c. 2011-04-08 16:11:41 -04:00
parse_utilcmd.c Fix collations when we call transformWhereClause from outside the parser. 2011-04-07 02:34:57 -04:00
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_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)