mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-11-27 07:21:09 +08:00
9f652d430f
ways. I'm not totally sure that I caught everything, but at least now they pass their regression tests with VARSIZE/SET_VARSIZE defined to reverse byte order.
550 lines
11 KiB
C
550 lines
11 KiB
C
#include "postgres.h"
|
|
#include "executor/spi.h"
|
|
|
|
#include "query_util.h"
|
|
|
|
MemoryContext AggregateContext = NULL;
|
|
|
|
static int
|
|
addone(int *counters, int last, int total)
|
|
{
|
|
counters[last]++;
|
|
if (counters[last] >= total)
|
|
{
|
|
if (last == 0)
|
|
return 0;
|
|
if (addone(counters, last - 1, total - 1) == 0)
|
|
return 0;
|
|
counters[last] = counters[last - 1] + 1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static QTNode *
|
|
findeq(QTNode * node, QTNode * ex, MemoryType memtype, QTNode * subs, bool *isfind)
|
|
{
|
|
|
|
if ((node->sign & ex->sign) != ex->sign || node->valnode->type != ex->valnode->type || node->valnode->val != ex->valnode->val)
|
|
return node;
|
|
|
|
if (node->flags & QTN_NOCHANGE)
|
|
return node;
|
|
|
|
if (node->valnode->type == OPR)
|
|
{
|
|
if (node->nchild == ex->nchild)
|
|
{
|
|
if (QTNEq(node, ex))
|
|
{
|
|
QTNFree(node);
|
|
if (subs)
|
|
{
|
|
node = QTNCopy(subs, memtype);
|
|
node->flags |= QTN_NOCHANGE;
|
|
}
|
|
else
|
|
node = NULL;
|
|
*isfind = true;
|
|
}
|
|
}
|
|
else if (node->nchild > ex->nchild)
|
|
{
|
|
int *counters = (int *) palloc(sizeof(int) * node->nchild);
|
|
int i;
|
|
QTNode *tnode = (QTNode *) MEMALLOC(memtype, sizeof(QTNode));
|
|
|
|
memset(tnode, 0, sizeof(QTNode));
|
|
tnode->child = (QTNode **) MEMALLOC(memtype, sizeof(QTNode *) * ex->nchild);
|
|
tnode->nchild = ex->nchild;
|
|
tnode->valnode = (ITEM *) MEMALLOC(memtype, sizeof(ITEM));
|
|
*(tnode->valnode) = *(ex->valnode);
|
|
|
|
for (i = 0; i < ex->nchild; i++)
|
|
counters[i] = i;
|
|
|
|
do
|
|
{
|
|
tnode->sign = 0;
|
|
for (i = 0; i < ex->nchild; i++)
|
|
{
|
|
tnode->child[i] = node->child[counters[i]];
|
|
tnode->sign |= tnode->child[i]->sign;
|
|
}
|
|
|
|
if (QTNEq(tnode, ex))
|
|
{
|
|
int j = 0;
|
|
|
|
MEMFREE(memtype, tnode->valnode);
|
|
MEMFREE(memtype, tnode->child);
|
|
MEMFREE(memtype, tnode);
|
|
if (subs)
|
|
{
|
|
tnode = QTNCopy(subs, memtype);
|
|
tnode->flags = QTN_NOCHANGE | QTN_NEEDFREE;
|
|
}
|
|
else
|
|
tnode = NULL;
|
|
|
|
node->child[counters[0]] = tnode;
|
|
|
|
for (i = 1; i < ex->nchild; i++)
|
|
node->child[counters[i]] = NULL;
|
|
for (i = 0; i < node->nchild; i++)
|
|
{
|
|
if (node->child[i])
|
|
{
|
|
node->child[j] = node->child[i];
|
|
j++;
|
|
}
|
|
}
|
|
|
|
node->nchild = j;
|
|
|
|
*isfind = true;
|
|
|
|
break;
|
|
}
|
|
} while (addone(counters, ex->nchild - 1, node->nchild));
|
|
if (tnode && (tnode->flags & QTN_NOCHANGE) == 0)
|
|
{
|
|
MEMFREE(memtype, tnode->valnode);
|
|
MEMFREE(memtype, tnode->child);
|
|
MEMFREE(memtype, tnode);
|
|
}
|
|
else
|
|
QTNSort(node);
|
|
pfree(counters);
|
|
}
|
|
}
|
|
else if (QTNEq(node, ex))
|
|
{
|
|
QTNFree(node);
|
|
if (subs)
|
|
{
|
|
node = QTNCopy(subs, memtype);
|
|
node->flags |= QTN_NOCHANGE;
|
|
}
|
|
else
|
|
{
|
|
node = NULL;
|
|
}
|
|
*isfind = true;
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
static QTNode *
|
|
dofindsubquery(QTNode * root, QTNode * ex, MemoryType memtype, QTNode * subs, bool *isfind)
|
|
{
|
|
root = findeq(root, ex, memtype, subs, isfind);
|
|
|
|
if (root && (root->flags & QTN_NOCHANGE) == 0 && root->valnode->type == OPR)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < root->nchild; i++)
|
|
root->child[i] = dofindsubquery(root->child[i], ex, memtype, subs, isfind);
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
static QTNode *
|
|
dropvoidsubtree(QTNode * root)
|
|
{
|
|
|
|
if (!root)
|
|
return NULL;
|
|
|
|
if (root->valnode->type == OPR)
|
|
{
|
|
int i,
|
|
j = 0;
|
|
|
|
for (i = 0; i < root->nchild; i++)
|
|
{
|
|
if (root->child[i])
|
|
{
|
|
root->child[j] = root->child[i];
|
|
j++;
|
|
}
|
|
}
|
|
|
|
root->nchild = j;
|
|
|
|
if (root->valnode->val == (int4) '!' && root->nchild == 0)
|
|
{
|
|
QTNFree(root);
|
|
root = NULL;
|
|
}
|
|
else if (root->nchild == 1)
|
|
{
|
|
QTNode *nroot = root->child[0];
|
|
|
|
pfree(root);
|
|
root = nroot;
|
|
}
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
static QTNode *
|
|
findsubquery(QTNode * root, QTNode * ex, MemoryType memtype, QTNode * subs, bool *isfind)
|
|
{
|
|
bool DidFind = false;
|
|
|
|
root = dofindsubquery(root, ex, memtype, subs, &DidFind);
|
|
|
|
if (!subs && DidFind)
|
|
root = dropvoidsubtree(root);
|
|
|
|
if (isfind)
|
|
*isfind = DidFind;
|
|
|
|
return root;
|
|
}
|
|
|
|
static Oid tsqOid = InvalidOid;
|
|
static void
|
|
get_tsq_Oid(void)
|
|
{
|
|
int ret;
|
|
bool isnull;
|
|
|
|
if ((ret = SPI_exec("select oid from pg_type where typname='tsquery'", 1)) < 0)
|
|
/* internal error */
|
|
elog(ERROR, "SPI_exec to get tsquery oid returns %d", ret);
|
|
|
|
if (SPI_processed < 1)
|
|
/* internal error */
|
|
elog(ERROR, "there is no tsvector type");
|
|
tsqOid = DatumGetObjectId(SPI_getbinval(SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1, &isnull));
|
|
if (tsqOid == InvalidOid)
|
|
/* internal error */
|
|
elog(ERROR, "tsquery type has InvalidOid");
|
|
}
|
|
|
|
|
|
PG_FUNCTION_INFO_V1(tsquery_rewrite);
|
|
PG_FUNCTION_INFO_V1(rewrite_accum);
|
|
Datum rewrite_accum(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
rewrite_accum(PG_FUNCTION_ARGS)
|
|
{
|
|
QUERYTYPE *acc = (QUERYTYPE *) PG_GETARG_POINTER(0);
|
|
ArrayType *qa = (ArrayType *) DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(1)));
|
|
QUERYTYPE *q;
|
|
QTNode *qex,
|
|
*subs = NULL,
|
|
*acctree;
|
|
bool isfind = false;
|
|
Datum *elemsp;
|
|
int nelemsp;
|
|
|
|
AggregateContext = ((AggState *) fcinfo->context)->aggcontext;
|
|
|
|
if (acc == NULL || PG_ARGISNULL(0))
|
|
{
|
|
acc = (QUERYTYPE *) MEMALLOC(AggMemory, sizeof(QUERYTYPE));
|
|
SET_VARSIZE(acc, HDRSIZEQT);
|
|
acc->size = 0;
|
|
}
|
|
|
|
if (qa == NULL || PG_ARGISNULL(1))
|
|
{
|
|
PG_FREE_IF_COPY(qa, 1);
|
|
PG_RETURN_POINTER(acc);
|
|
}
|
|
|
|
if (ARR_NDIM(qa) != 1)
|
|
elog(ERROR, "array must be one-dimensional, not %d dimension", ARR_NDIM(qa));
|
|
|
|
if (ArrayGetNItems(ARR_NDIM(qa), ARR_DIMS(qa)) != 3)
|
|
elog(ERROR, "array should have only three elements");
|
|
|
|
if (tsqOid == InvalidOid)
|
|
{
|
|
SPI_connect();
|
|
get_tsq_Oid();
|
|
SPI_finish();
|
|
}
|
|
|
|
if (ARR_ELEMTYPE(qa) != tsqOid)
|
|
elog(ERROR, "array should contain tsquery type");
|
|
|
|
deconstruct_array(qa, tsqOid, -1, false, 'i', &elemsp, NULL, &nelemsp);
|
|
|
|
q = (QUERYTYPE *) DatumGetPointer(elemsp[0]);
|
|
if (q->size == 0)
|
|
{
|
|
pfree(elemsp);
|
|
PG_RETURN_POINTER(acc);
|
|
}
|
|
|
|
if (!acc->size)
|
|
{
|
|
if (VARSIZE(acc) > HDRSIZEQT)
|
|
{
|
|
pfree(elemsp);
|
|
PG_RETURN_POINTER(acc);
|
|
}
|
|
else
|
|
acctree = QT2QTN(GETQUERY(q), GETOPERAND(q));
|
|
}
|
|
else
|
|
acctree = QT2QTN(GETQUERY(acc), GETOPERAND(acc));
|
|
|
|
QTNTernary(acctree);
|
|
QTNSort(acctree);
|
|
|
|
q = (QUERYTYPE *) DatumGetPointer(elemsp[1]);
|
|
if (q->size == 0)
|
|
{
|
|
pfree(elemsp);
|
|
PG_RETURN_POINTER(acc);
|
|
}
|
|
qex = QT2QTN(GETQUERY(q), GETOPERAND(q));
|
|
QTNTernary(qex);
|
|
QTNSort(qex);
|
|
|
|
q = (QUERYTYPE *) DatumGetPointer(elemsp[2]);
|
|
if (q->size)
|
|
subs = QT2QTN(GETQUERY(q), GETOPERAND(q));
|
|
|
|
acctree = findsubquery(acctree, qex, PlainMemory, subs, &isfind);
|
|
|
|
if (isfind || !acc->size)
|
|
{
|
|
/* pfree( acc ); do not pfree(p), because nodeAgg.c will */
|
|
if (acctree)
|
|
{
|
|
QTNBinary(acctree);
|
|
acc = QTN2QT(acctree, AggMemory);
|
|
}
|
|
else
|
|
{
|
|
acc = (QUERYTYPE *) MEMALLOC(AggMemory, HDRSIZEQT * 2);
|
|
SET_VARSIZE(acc, HDRSIZEQT * 2);
|
|
acc->size = 0;
|
|
}
|
|
}
|
|
|
|
pfree(elemsp);
|
|
QTNFree(qex);
|
|
QTNFree(subs);
|
|
QTNFree(acctree);
|
|
|
|
PG_RETURN_POINTER(acc);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(rewrite_finish);
|
|
Datum rewrite_finish(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
rewrite_finish(PG_FUNCTION_ARGS)
|
|
{
|
|
QUERYTYPE *acc = (QUERYTYPE *) PG_GETARG_POINTER(0);
|
|
QUERYTYPE *rewrited;
|
|
|
|
if (acc == NULL || PG_ARGISNULL(0) || acc->size == 0)
|
|
{
|
|
acc = (QUERYTYPE *) palloc(sizeof(QUERYTYPE));
|
|
SET_VARSIZE(acc, HDRSIZEQT);
|
|
acc->size = 0;
|
|
}
|
|
|
|
rewrited = (QUERYTYPE *) palloc(VARSIZE(acc));
|
|
memcpy(rewrited, acc, VARSIZE(acc));
|
|
pfree(acc);
|
|
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|
|
|
|
Datum tsquery_rewrite(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
tsquery_rewrite(PG_FUNCTION_ARGS)
|
|
{
|
|
QUERYTYPE *query = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(0)));
|
|
text *in = PG_GETARG_TEXT_P(1);
|
|
QUERYTYPE *rewrited = query;
|
|
QTNode *tree;
|
|
char *buf;
|
|
void *plan;
|
|
Portal portal;
|
|
bool isnull;
|
|
int i;
|
|
|
|
if (query->size == 0)
|
|
{
|
|
PG_FREE_IF_COPY(in, 1);
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|
|
|
|
tree = QT2QTN(GETQUERY(query), GETOPERAND(query));
|
|
QTNTernary(tree);
|
|
QTNSort(tree);
|
|
|
|
buf = (char *) palloc(VARSIZE(in));
|
|
memcpy(buf, VARDATA(in), VARSIZE(in) - VARHDRSZ);
|
|
buf[VARSIZE(in) - VARHDRSZ] = '\0';
|
|
|
|
SPI_connect();
|
|
|
|
if (tsqOid == InvalidOid)
|
|
get_tsq_Oid();
|
|
|
|
if ((plan = SPI_prepare(buf, 0, NULL)) == NULL)
|
|
elog(ERROR, "SPI_prepare('%s') returns NULL", buf);
|
|
|
|
if ((portal = SPI_cursor_open(NULL, plan, NULL, NULL, false)) == NULL)
|
|
elog(ERROR, "SPI_cursor_open('%s') returns NULL", buf);
|
|
|
|
SPI_cursor_fetch(portal, true, 100);
|
|
|
|
if (SPI_tuptable->tupdesc->natts != 2)
|
|
elog(ERROR, "number of fields doesn't equal to 2");
|
|
|
|
if (SPI_gettypeid(SPI_tuptable->tupdesc, 1) != tsqOid)
|
|
elog(ERROR, "column #1 isn't of tsquery type");
|
|
|
|
if (SPI_gettypeid(SPI_tuptable->tupdesc, 2) != tsqOid)
|
|
elog(ERROR, "column #2 isn't of tsquery type");
|
|
|
|
while (SPI_processed > 0 && tree)
|
|
{
|
|
for (i = 0; i < SPI_processed && tree; i++)
|
|
{
|
|
Datum qdata = SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 1, &isnull);
|
|
Datum sdata;
|
|
|
|
if (isnull)
|
|
continue;
|
|
|
|
sdata = SPI_getbinval(SPI_tuptable->vals[i], SPI_tuptable->tupdesc, 2, &isnull);
|
|
|
|
if (!isnull)
|
|
{
|
|
QUERYTYPE *qtex = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM(qdata));
|
|
QUERYTYPE *qtsubs = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM(sdata));
|
|
QTNode *qex,
|
|
*qsubs = NULL;
|
|
|
|
if (qtex->size == 0)
|
|
{
|
|
if (qtex != (QUERYTYPE *) DatumGetPointer(qdata))
|
|
pfree(qtex);
|
|
if (qtsubs != (QUERYTYPE *) DatumGetPointer(sdata))
|
|
pfree(qtsubs);
|
|
continue;
|
|
}
|
|
|
|
qex = QT2QTN(GETQUERY(qtex), GETOPERAND(qtex));
|
|
|
|
QTNTernary(qex);
|
|
QTNSort(qex);
|
|
|
|
if (qtsubs->size)
|
|
qsubs = QT2QTN(GETQUERY(qtsubs), GETOPERAND(qtsubs));
|
|
|
|
tree = findsubquery(tree, qex, SPIMemory, qsubs, NULL);
|
|
|
|
QTNFree(qex);
|
|
if (qtex != (QUERYTYPE *) DatumGetPointer(qdata))
|
|
pfree(qtex);
|
|
QTNFree(qsubs);
|
|
if (qtsubs != (QUERYTYPE *) DatumGetPointer(sdata))
|
|
pfree(qtsubs);
|
|
}
|
|
}
|
|
|
|
SPI_freetuptable(SPI_tuptable);
|
|
SPI_cursor_fetch(portal, true, 100);
|
|
}
|
|
|
|
SPI_freetuptable(SPI_tuptable);
|
|
SPI_cursor_close(portal);
|
|
SPI_freeplan(plan);
|
|
SPI_finish();
|
|
|
|
|
|
if (tree)
|
|
{
|
|
QTNBinary(tree);
|
|
rewrited = QTN2QT(tree, PlainMemory);
|
|
QTNFree(tree);
|
|
PG_FREE_IF_COPY(query, 0);
|
|
}
|
|
else
|
|
{
|
|
SET_VARSIZE(rewrited, HDRSIZEQT);
|
|
rewrited->size = 0;
|
|
}
|
|
|
|
pfree(buf);
|
|
PG_FREE_IF_COPY(in, 1);
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|
|
|
|
|
|
PG_FUNCTION_INFO_V1(tsquery_rewrite_query);
|
|
Datum tsquery_rewrite_query(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
tsquery_rewrite_query(PG_FUNCTION_ARGS)
|
|
{
|
|
QUERYTYPE *query = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(0)));
|
|
QUERYTYPE *ex = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(1)));
|
|
QUERYTYPE *subst = (QUERYTYPE *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(2)));
|
|
QUERYTYPE *rewrited = query;
|
|
QTNode *tree,
|
|
*qex,
|
|
*subs = NULL;
|
|
|
|
if (query->size == 0 || ex->size == 0)
|
|
{
|
|
PG_FREE_IF_COPY(ex, 1);
|
|
PG_FREE_IF_COPY(subst, 2);
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|
|
|
|
tree = QT2QTN(GETQUERY(query), GETOPERAND(query));
|
|
QTNTernary(tree);
|
|
QTNSort(tree);
|
|
|
|
qex = QT2QTN(GETQUERY(ex), GETOPERAND(ex));
|
|
QTNTernary(qex);
|
|
QTNSort(qex);
|
|
|
|
if (subst->size)
|
|
subs = QT2QTN(GETQUERY(subst), GETOPERAND(subst));
|
|
|
|
tree = findsubquery(tree, qex, PlainMemory, subs, NULL);
|
|
QTNFree(qex);
|
|
QTNFree(subs);
|
|
|
|
if (!tree)
|
|
{
|
|
SET_VARSIZE(rewrited, HDRSIZEQT);
|
|
rewrited->size = 0;
|
|
PG_FREE_IF_COPY(ex, 1);
|
|
PG_FREE_IF_COPY(subst, 2);
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|
|
else
|
|
{
|
|
QTNBinary(tree);
|
|
rewrited = QTN2QT(tree, PlainMemory);
|
|
QTNFree(tree);
|
|
}
|
|
|
|
PG_FREE_IF_COPY(query, 0);
|
|
PG_FREE_IF_COPY(ex, 1);
|
|
PG_FREE_IF_COPY(subst, 2);
|
|
PG_RETURN_POINTER(rewrited);
|
|
}
|