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Copy collencoding in CREATE COLLATION / FROM

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This command used to compute the collencoding entry like when a
completely new collation is created.  But for example when copying the
"C" collation, this would then result in a collation that has a
collencoding entry for the current database encoding rather than -1,
thus not making an exact copy.  This has probably no practical impact,
but making this change keeps the catalog contents neat.

Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
This commit is contained in:
Peter Eisentraut 2017-06-30 08:50:39 -04:00
parent 08aed6604d
commit 54baa48139
1 changed files with 10 additions and 6 deletions
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16
src/backend/commands/collationcmds.c
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@ -64,7 +64,7 @@ DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_e
char *collcollate = NULL;
char *collctype = NULL;
char *collproviderstr = NULL;
int collencoding;
int collencoding = 0;
char collprovider = 0;
char *collversion = NULL;
Oid newoid;
@ -126,6 +126,7 @@ DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_e
collcollate = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collcollate));
collctype = pstrdup(NameStr(((Form_pg_collation) GETSTRUCT(tp))->collctype));
collprovider = ((Form_pg_collation) GETSTRUCT(tp))->collprovider;
collencoding = ((Form_pg_collation) GETSTRUCT(tp))->collencoding;
ReleaseSysCache(tp);
@ -185,12 +186,15 @@ DefineCollation(ParseState *pstate, List *names, List *parameters, bool if_not_e
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("parameter \"lc_ctype\" must be specified")));
if (collprovider == COLLPROVIDER_ICU)
collencoding = -1;
else
if (!fromEl)
{
collencoding = GetDatabaseEncoding();
check_encoding_locale_matches(collencoding, collcollate, collctype);
if (collprovider == COLLPROVIDER_ICU)
collencoding = -1;
else
{
collencoding = GetDatabaseEncoding();
check_encoding_locale_matches(collencoding, collcollate, collctype);
}
}
if (!collversion)