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postgresql/src/backend/parser
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Tatsuo Ishii eb335a034b I have committed many support files for CREATE CONVERSION. Default 
conversion procs and conversions are added in initdb. Currently
supported conversions are:

UTF-8(UNICODE) <--> SQL_ASCII, ISO-8859-1 to 16, EUC_JP, EUC_KR,
		    EUC_CN, EUC_TW, SJIS, BIG5, GBK, GB18030, UHC,
		    JOHAB, TCVN

EUC_JP <--> SJIS
EUC_TW <--> BIG5
MULE_INTERNAL <--> EUC_JP, SJIS, EUC_TW, BIG5

Note that initial contents of pg_conversion system catalog are created
in the initdb process. So doing initdb required is ideal, it's
possible to add them to your databases by hand, however. To accomplish
this:

psql -f your_postgresql_install_path/share/conversion_create.sql your_database

So I did not bump up the version in cataversion.h.

TODO:
Add more conversion procs
Add [CASCADE|RESTRICT] to DROP CONVERSION
Add tuples to pg_depend
Add regression tests
Write docs
Add SQL99 CONVERT command?
--
Tatsuo Ishii
2002-07-18 02:02:30 +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 Add more dependency insertions --- this completes the basic pg_depend 2002-07-16 22:12:20 +00:00
gram.y I have committed many support files for CREATE CONVERSION. Default 2002-07-18 02:02:30 +00:00
keywords.c Add new CREATE CONVERSION/DROP CONVERSION command. 2002-07-11 07:39:28 +00:00
Makefile Scanner performance improvements 2002-04-20 21:56:15 +00:00
parse_agg.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_clause.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_coerce.c Oops, proper initialization for domainTypMod was none at all, not 0. 2002-07-09 13:52:14 +00:00
parse_expr.c I've fixed up the way domain constraints (not null and type length) 2002-07-06 20:16:36 +00:00
parse_func.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_node.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_oper.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_relation.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_target.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
parse_type.c I've fixed up the way domain constraints (not null and type length) 2002-07-06 20:16:36 +00:00
parser.c Update copyright to 2002. 2002-06-20 20:29:54 +00:00
README cleanup 1998-08-23 14:43:46 +00:00
scan.l Implement SQL99 CREATE CAST and DROP CAST statements. 2002-06-22 02:04:55 +00:00
scansup.c Update copyright to 2002. 2002-06-20 20:29:54 +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