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Tom Lane 784e762e88 Support multi-argument UNNEST(), and TABLE() syntax for multiple functions. ... This patch adds the ability to write TABLE( function1(), function2(), ...) as a single FROM-clause entry. The result is the concatenation of the first row from each function, followed by the second row from each function, etc; with NULLs inserted if any function produces fewer rows than others. This is believed to be a much more useful behavior than what Postgres currently does with multiple SRFs in a SELECT list. This syntax also provides a reasonable way to combine use of column definition lists with WITH ORDINALITY: put the column definition list inside TABLE(), where it's clear that it doesn't control the ordinality column as well. Also implement SQL-compliant multiple-argument UNNEST(), by turning UNNEST(a,b,c) into TABLE(unnest(a), unnest(b), unnest(c)). The SQL standard specifies TABLE() with only a single function, not multiple functions, and it seems to require an implicit UNNEST() which is not what this patch does. There may be something wrong with that reading of the spec, though, because if it's right then the spec's TABLE() is just a pointless alternative spelling of UNNEST(). After further review of that, we might choose to adopt a different syntax for what this patch does, but in any case this functionality seems clearly worthwhile. Andrew Gierth, reviewed by Zoltán Böszörményi and Heikki Linnakangas, and significantly revised by me		12 years ago
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.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	16 years ago
analyze.h	Fix crash in error report of invalid tuple lock	13 years ago
gramparse.h	Update copyrights for 2013	13 years ago
keywords.h	Update copyrights for 2013	13 years ago
kwlist.h	Add SQL Standard WITH ORDINALITY support for UNNEST (and any other SRF)	13 years ago
parse_agg.h	Allow aggregate functions to be VARIADIC.	13 years ago
parse_clause.h	Clean up the mess around EXPLAIN and materialized views.	13 years ago
parse_coerce.h	Update copyrights for 2013	13 years ago
parse_collate.h	Update copyrights for 2013	13 years ago
parse_cte.h	Update copyrights for 2013	13 years ago
parse_expr.h	Update copyrights for 2013	13 years ago
parse_func.h	Move checking an explicit VARIADIC "any" argument into the parser.	13 years ago
parse_node.h	Implement the FILTER clause for aggregate function calls.	13 years ago
parse_oper.h	Update copyrights for 2013	13 years ago
parse_param.h	Clean up the mess around EXPLAIN and materialized views.	13 years ago
parse_relation.h	Support multi-argument UNNEST(), and TABLE() syntax for multiple functions.	12 years ago
parse_target.h	Update copyrights for 2013	13 years ago
parse_type.h	Update copyrights for 2013	13 years ago
parse_utilcmd.h	Update copyrights for 2013	13 years ago
parser.h	Update copyrights for 2013	13 years ago
parsetree.h	Update copyrights for 2013	13 years ago
scanner.h	Update copyrights for 2013	13 years ago
scansup.h	Update copyrights for 2013	13 years ago