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Per-column collation support

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This adds collation support for columns and domains, a COLLATE clause
to override it per expression, and B-tree index support.

Peter Eisentraut
reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
This commit is contained in:
Peter Eisentraut
2011-02-08 23:04:18 +02:00
parent 1703f0e8da
commit 414c5a2ea6
156 changed files with 4519 additions and 582 deletions
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16
src/backend/utils/adt/like.c
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@ -39,7 +39,7 @@ static int UTF8_MatchText(char *t, int tlen, char *p, int plen);
static int SB_IMatchText(char *t, int tlen, char *p, int plen);
static int GenericMatchText(char *s, int slen, char *p, int plen);
static int Generic_Text_IC_like(text *str, text *pat);
static int Generic_Text_IC_like(text *str, text *pat, Oid collation);
/*--------------------
* Support routine for MatchText. Compares given multibyte streams
@ -133,7 +133,7 @@ GenericMatchText(char *s, int slen, char *p, int plen)
}
static inline int
Generic_Text_IC_like(text *str, text *pat)
Generic_Text_IC_like(text *str, text *pat, Oid collation)
{
char *s,
*p;
@ -149,10 +149,10 @@ Generic_Text_IC_like(text *str, text *pat)
if (pg_database_encoding_max_length() > 1)
{
/* lower's result is never packed, so OK to use old macros here */
pat = DatumGetTextP(DirectFunctionCall1(lower, PointerGetDatum(pat)));
pat = DatumGetTextP(DirectFunctionCall1WithCollation(lower, collation, PointerGetDatum(pat)));
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
str = DatumGetTextP(DirectFunctionCall1(lower, PointerGetDatum(str)));
str = DatumGetTextP(DirectFunctionCall1WithCollation(lower, collation, PointerGetDatum(str)));
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
if (GetDatabaseEncoding() == PG_UTF8)
@ -314,7 +314,7 @@ nameiclike(PG_FUNCTION_ARGS)
strtext = DatumGetTextP(DirectFunctionCall1(name_text,
NameGetDatum(str)));
result = (Generic_Text_IC_like(strtext, pat) == LIKE_TRUE);
result = (Generic_Text_IC_like(strtext, pat, PG_GET_COLLATION()) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
@ -329,7 +329,7 @@ nameicnlike(PG_FUNCTION_ARGS)
strtext = DatumGetTextP(DirectFunctionCall1(name_text,
NameGetDatum(str)));
result = (Generic_Text_IC_like(strtext, pat) != LIKE_TRUE);
result = (Generic_Text_IC_like(strtext, pat, PG_GET_COLLATION()) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
@ -341,7 +341,7 @@ texticlike(PG_FUNCTION_ARGS)
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
result = (Generic_Text_IC_like(str, pat) == LIKE_TRUE);
result = (Generic_Text_IC_like(str, pat, PG_GET_COLLATION()) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
@ -353,7 +353,7 @@ texticnlike(PG_FUNCTION_ARGS)
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
result = (Generic_Text_IC_like(str, pat) != LIKE_TRUE);
result = (Generic_Text_IC_like(str, pat, PG_GET_COLLATION()) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}