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1 Minimize memory allocation for void (but not null) value.

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2 Add silly ordering for ts_vector to aim grouping, union, except etc. Don't use BTree opclass (tsvector_ops).
This commit is contained in:
Teodor Sigaev
2004-03-25 16:56:10 +00:00
parent 457ad3925d
commit eebdfcdbe6
4 changed files with 722 additions and 0 deletions
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90
contrib/tsearch2/tsvector.c
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@ -451,6 +451,8 @@ tsvector_in(PG_FUNCTION_ARGS)
if (len > 0)
len = uniqueentry(arr, len, tmpbuf, &buflen);
else
buflen=0;
totallen = CALCDATASIZE(len, buflen);
in = (tsvector *) palloc(totallen);
memset(in, 0, totallen);
@ -932,3 +934,91 @@ tsearch2(PG_FUNCTION_ARGS)
return PointerGetDatum(rettuple);
}
static int
silly_cmp_tsvector(const tsvector *a, const tsvector *b) {
if ( a->len < b->len )
return -1;
else if ( a->len > b->len )
return 1;
else if ( a->size < b->size )
return -1;
else if ( a->size > b->size )
return 1;
else {
unsigned char *aptr=(unsigned char *)(a->data) + DATAHDRSIZE;
unsigned char *bptr=(unsigned char *)(b->data) + DATAHDRSIZE;
while( aptr - ( (unsigned char *)(a->data) ) < a->len ) {
if ( *aptr != *bptr )
return ( *aptr < *bptr ) ? -1 : 1;
aptr++; bptr++;
}
}
return 0;
}
PG_FUNCTION_INFO_V1(tsvector_cmp);
PG_FUNCTION_INFO_V1(tsvector_lt);
PG_FUNCTION_INFO_V1(tsvector_le);
PG_FUNCTION_INFO_V1(tsvector_eq);
PG_FUNCTION_INFO_V1(tsvector_ne);
PG_FUNCTION_INFO_V1(tsvector_ge);
PG_FUNCTION_INFO_V1(tsvector_gt);
Datum tsvector_cmp(PG_FUNCTION_ARGS);
Datum tsvector_lt(PG_FUNCTION_ARGS);
Datum tsvector_le(PG_FUNCTION_ARGS);
Datum tsvector_eq(PG_FUNCTION_ARGS);
Datum tsvector_ne(PG_FUNCTION_ARGS);
Datum tsvector_ge(PG_FUNCTION_ARGS);
Datum tsvector_gt(PG_FUNCTION_ARGS);
#define RUNCMP \
tsvector *a = (tsvector *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(0)));\
tsvector *b = (tsvector *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(1)));\
int res = silly_cmp_tsvector(a,b); \
PG_FREE_IF_COPY(a,0); \
PG_FREE_IF_COPY(b,1); \
Datum
tsvector_cmp(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_INT32(res);
}
Datum
tsvector_lt(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res < 0) ? true : false);
}
Datum
tsvector_le(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res <= 0) ? true : false);
}
Datum
tsvector_eq(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res == 0) ? true : false);
}
Datum
tsvector_ge(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res >= 0) ? true : false);
}
Datum
tsvector_gt(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res > 0) ? true : false);
}
Datum
tsvector_ne(PG_FUNCTION_ARGS) {
RUNCMP
PG_RETURN_BOOL((res != 0) ? true : false);
}