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Implement the basic form of UNNEST, ie unnest(anyarray) returns setof

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anyelement.  This lacks the WITH ORDINALITY option, as well as the multiple
input arrays option added in the most recent SQL specs.  But it's still a
pretty useful subset of the spec's functionality, and it is enough to
allow obsoleting contrib/intagg.
This commit is contained in:
Tom Lane
2008-11-14 00:51:47 +00:00
parent 5b9453bcd3
commit c889ebce0a
7 changed files with 193 additions and 6 deletions
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3
src/include/utils/array.h
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@ -49,7 +49,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/array.h,v 1.71 2008/11/13 15:59:50 petere Exp $
* $PostgreSQL: pgsql/src/include/utils/array.h,v 1.72 2008/11/14 00:51:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -206,6 +206,7 @@ extern Datum generate_subscripts(PG_FUNCTION_ARGS);
extern Datum generate_subscripts_nodir(PG_FUNCTION_ARGS);
extern Datum array_fill(PG_FUNCTION_ARGS);
extern Datum array_fill_with_lower_bounds(PG_FUNCTION_ARGS);
extern Datum array_unnest(PG_FUNCTION_ARGS);
extern Datum array_ref(ArrayType *array, int nSubscripts, int *indx,
int arraytyplen, int elmlen, bool elmbyval, char elmalign,