database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-17 06:41:09 +03:00
Code Activity

Extend pg_cast castimplicit column to a three-way value; this allows us

Browse Source 
to be flexible about assignment casts without introducing ambiguity in
operator/function resolution.  Introduce a well-defined promotion hierarchy
for numeric datatypes (int2->int4->int8->numeric->float4->float8).
Change make_const to initially label numeric literals as int4, int8, or
numeric (never float8 anymore).
Explicitly mark Func and RelabelType nodes to indicate whether they came
from a function call, explicit cast, or implicit cast; use this to do
reverse-listing more accurately and without so many heuristics.
Explicit casts to char, varchar, bit, varbit will truncate or pad without
raising an error (the pre-7.2 behavior), while assigning to a column without
any explicit cast will still raise an error for wrong-length data like 7.3.
This more nearly follows the SQL spec than 7.2 behavior (we should be
reporting a 'completion condition' in the explicit-cast cases, but we have
no mechanism for that, so just do silent truncation).
Fix some problems with enforcement of typmod for array elements;
it didn't work at all in 'UPDATE ... SET array[n] = foo', for example.
Provide a generalized array_length_coerce() function to replace the
specialized per-array-type functions that used to be needed (and were
missing for NUMERIC as well as all the datetime types).
Add missing conversions int8<->float4, text<->numeric, oid<->int8.
initdb forced.
This commit is contained in:
Tom Lane
2002-09-18 21:35:25 +00:00
parent cc70ba2e4d
commit b26dfb9522
70 changed files with 1642 additions and 1528 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/backend/optimizer/path/pathkeys.c
View File

@ -11,7 +11,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/pathkeys.c,v 1.40 2002/09/04 20:31:20 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/pathkeys.c,v 1.41 2002/09/18 21:35:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -520,6 +520,7 @@ build_index_pathkeys(Query *root,
funcnode->funcid = index->indproc;
funcnode->funcresulttype = get_func_rettype(index->indproc);
funcnode->funcretset = false; /* can never be a set */
funcnode->funcformat = COERCE_DONTCARE; /* to match any user expr */
funcnode->func_fcache = NULL;
while (*indexkeys != 0)