Datum
jsquery_gt(PG_FUNCTION_ARGS)
{
JsQuery *jq1 = PG_GETARG_JSQUERY(0);
JsQuery *jq2 = PG_GETARG_JSQUERY(1);
int32 res;
res = compareJsQuery(VARDATA(jq1), 0, VARDATA(jq2), 0);
PG_FREE_IF_COPY(jq1, 0);
PG_FREE_IF_COPY(jq2, 1);
PG_RETURN_BOOL(res > 0);
}
Datum
jsquery_gt(PG_FUNCTION_ARGS)
{
JsQuery *jq1 = PG_GETARG_JSQUERY(0);
JsQuery *jq2 = PG_GETARG_JSQUERY(1);
int32 res;
JsQueryItem v1, v2;
jsqInit(&v1, jq1);
jsqInit(&v2, jq2);
res = compareJsQuery(&v1, &v2);
PG_FREE_IF_COPY(jq1, 0);
PG_FREE_IF_COPY(jq2, 1);
PG_RETURN_BOOL(res > 0);
}
static int
compareJsQuery(JsQueryItem *v1, JsQueryItem *v2)
{
JsQueryItem elem1, elem2;
int32 res = 0;
check_stack_depth();
if (v1->type != v2->type)
return (v1->type > v2->type) ? 1 : -1;
switch(v1->type)
{
case jqiNull:
case jqiCurrent:
case jqiLength:
case jqiAny:
case jqiAnyArray:
case jqiAnyKey:
case jqiAll:
case jqiAllArray:
case jqiAllKey:
break;
case jqiKey:
case jqiString:
{
int32 len1, len2;
char *s1, *s2;
s1 = jsqGetString(v1, &len1);
s2 = jsqGetString(v2, &len2);
if (len1 != len2)
res = (len1 > len2) ? 1 : -1;
else
res = memcmp(s1, s2, len1);
}
break;
case jqiNumeric:
res = compareNumeric(jsqGetNumeric(v1), jsqGetNumeric(v2));
break;
case jqiBool:
if (jsqGetBool(v1) != jsqGetBool(v2))
res = (jsqGetBool(v1) > jsqGetBool(v2)) ? 1 : -1;
break;
case jqiArray:
if (v1->array.nelems != v2->array.nelems)
res = (v1->array.nelems > v2->array.nelems) ? 1 : -1;
while(res == 0 && jsqIterateArray(v1, &elem1) && jsqIterateArray(v2, &elem2))
res = compareJsQuery(&elem1, &elem2);
break;
case jqiAnd:
case jqiOr:
jsqGetLeftArg(v1, &elem1);
jsqGetLeftArg(v2, &elem2);
res = compareJsQuery(&elem1, &elem2);
if (res == 0)
{
jsqGetRightArg(v1, &elem1);
jsqGetRightArg(v2, &elem2);
res = compareJsQuery(&elem1, &elem2);
}
break;
case jqiEqual:
case jqiIn:
case jqiLess:
case jqiGreater:
case jqiLessOrEqual:
case jqiGreaterOrEqual:
case jqiContains:
case jqiContained:
case jqiOverlap:
case jqiNot:
jsqGetArg(v1, &elem1);
jsqGetArg(v2, &elem2);
res = compareJsQuery(&elem1, &elem2);
break;
default:
elog(ERROR, "Unknown JsQueryItem type: %d", v1->type);
}
if (res == 0)
{
if (jsqGetNext(v1, &elem1))
{
if (jsqGetNext(v2, &elem2))
res = compareJsQuery(&elem1, &elem2);
else
res = 1;
}
else if (jsqGetNext(v2, &elem2))
{
res = -1;
}
}
return res;
}
static int
compareJsQuery(char *base1, int32 pos1, char *base2, int32 pos2)
{
int32 type1,
nextPos1,
type2,
nextPos2;
int32 res = 0;
check_stack_depth();
pos1 = readJsQueryHeader(base1, pos1, &type1, &nextPos1);
pos2 = readJsQueryHeader(base2, pos2, &type2, &nextPos2);
if (type1 != type2)
return (type1 > type2) ? 1 : -1;
switch(type1)
{
case jqiNull:
case jqiAny:
case jqiAnyArray:
break;
case jqiKey:
case jqiString:
{
int32 len1, len2;
read_int32(len1, base1, pos1);
read_int32(len2, base2, pos2);
if (len1 != len2)
res = (len1 > len2) ? 1 : -1;
else
res = memcmp(base1 + pos1, base2 + pos2, len1);
}
break;
case jqiNumeric:
res = compareNumeric((Numeric)(base1 + pos1), (Numeric)(base2 + pos2));
break;
case jqiBool:
{
bool v1, v2;
read_byte(v1, base1, pos1);
read_byte(v2, base2, pos2);
if (v1 != v2)
res = (v1 > v2) ? 1 : -1;
}
break;
case jqiArray:
{
int32 i;
int32 nelems1, *arrayPos1,
nelems2, *arrayPos2;
read_int32(nelems1, base1, pos1);
arrayPos1 = (int32*)(base1 + pos1);
read_int32(nelems2, base2, pos2);
arrayPos2 = (int32*)(base2 + pos2);
if (nelems1 != nelems2)
res = (nelems1 > nelems2) ? 1 : -1;
for(i=0; i<nelems1 && res == 0; i++)
res = compareJsQuery(base1, arrayPos1[i], base2, arrayPos2[i]);
}
break;
case jqiAnd:
case jqiOr:
{
int32 left1, right1,
left2, right2;
read_int32(left1, base1, pos1);
read_int32(right1, base1, pos1);
read_int32(left2, base2, pos2);
read_int32(right2, base2, pos2);
res = compareJsQuery(base1, left1, base2, left2);
if (res == 0)
res = compareJsQuery(base1, right1, base2, right2);
}
break;
case jqiEqual:
case jqiIn:
case jqiLess:
case jqiGreater:
case jqiLessOrEqual:
case jqiGreaterOrEqual:
case jqiContains:
case jqiContained:
case jqiOverlap:
case jqiNot:
{
int32 arg1, arg2;
read_int32(arg1, base1, pos1);
read_int32(arg2, base2, pos2);
res = compareJsQuery(base1, arg1, base2, arg2);
}
break;
default:
elog(ERROR, "Unknown JsQueryItem type: %d", type1);
}
if (res == 0 && !(nextPos2 == 0 && nextPos1 == 0))
{
if (nextPos1 == 0 || nextPos2 == 0)
res = (nextPos1 > nextPos2) ? 1 : -1;
else
res = compareJsQuery(base1, nextPos1, base2, nextPos2);
}
return res;
}
