database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-30 21:42:05 +03:00
Code Activity

Create real array comparison functions (that use the element datatype's

Browse Source 
comparison functions), replacing the highly bogus bitwise array_eq.  Create
a btree index opclass for ANYARRAY --- it is now possible to create indexes
on array columns.
Arrange to cache the results of catalog lookups across multiple array
operations, instead of repeating the lookups on every call.
Add string_to_array and array_to_string functions.
Remove singleton_array, array_accum, array_assign, and array_subscript
functions, since these were for proof-of-concept and not intended to become
supported functions.
Minor adjustments to behavior in some corner cases with empty or
zero-dimensional arrays.

Joe Conway (with some editorializing by Tom Lane).
This commit is contained in:
Tom Lane
2003-06-27 00:33:26 +00:00
parent 0c985ab5a8
commit b3c0551eda
28 changed files with 1731 additions and 557 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/backend/parser/parse_coerce.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_coerce.c,v 2.100 2003/06/25 21:30:31 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_coerce.c,v 2.101 2003/06/27 00:33:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1145,7 +1145,8 @@ IsPreferredType(CATEGORY category, Oid type)
* invokable, no-function-needed pg_cast entry. Also, a domain is always
* binary-coercible to its base type, though *not* vice versa (in the other
* direction, one must apply domain constraint checks before accepting the
* value as legitimate).
* value as legitimate). We also need to special-case the polymorphic
* ANYARRAY type.
*
* This function replaces IsBinaryCompatible(), which was an inherently
* symmetric test. Since the pg_cast entries aren't necessarily symmetric,
@ -1170,6 +1171,11 @@ IsBinaryCoercible(Oid srctype, Oid targettype)
if (srctype == targettype)
return true;
/* Also accept any array type as coercible to ANYARRAY */
if (targettype == ANYARRAYOID)
if (get_element_type(srctype) != InvalidOid)
return true;
/* Else look in pg_cast */
tuple = SearchSysCache(CASTSOURCETARGET,
ObjectIdGetDatum(srctype),