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openGauss-server/contrib/hstore/hstore_op.cpp

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/*
* contrib/hstore/hstore_op.c
*/
#include "postgres.h"
#include "knl/knl_variable.h"
#include "access/hash.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "utils/builtins.h"
#include "utils/memutils.h"
#include "hstore.h"
/* old names for C functions */
HSTORE_POLLUTE(hstore_fetchval, fetchval);
HSTORE_POLLUTE(hstore_exists, exists);
HSTORE_POLLUTE(hstore_defined, defined);
HSTORE_POLLUTE(hstore_delete, hs_delete);
HSTORE_POLLUTE(hstore_concat, hs_concat);
HSTORE_POLLUTE(hstore_contains, hs_contains);
HSTORE_POLLUTE(hstore_contained, hs_contained);
HSTORE_POLLUTE(hstore_akeys, akeys);
HSTORE_POLLUTE(hstore_avals, avals);
HSTORE_POLLUTE(hstore_skeys, skeys);
HSTORE_POLLUTE(hstore_svals, svals);
HSTORE_POLLUTE(hstore_each, each);
/*
* We're often finding a sequence of keys in ascending order. The
* "lowbound" parameter is used to cache lower bounds of searches
* between calls, based on this assumption. Pass NULL for it for
* one-off or unordered searches.
*/
int hstoreFindKey(HStore* hs, int* lowbound, const char* key, uint32 keylen)
{
NOT_NULL_HS(hs);
HEntry* entries = ARRPTR(hs);
int stopLow = lowbound ? *lowbound : 0;
int stopHigh = HS_COUNT(hs);
int stopMiddle;
char* base = STRPTR(hs);
while (stopLow < stopHigh) {
int difference;
stopMiddle = stopLow + (stopHigh - stopLow) / 2;
if (HS_KEYLEN(entries, stopMiddle) == keylen)
difference = memcmp(HS_KEY(entries, base, stopMiddle), key, keylen);
else
difference = (HS_KEYLEN(entries, stopMiddle) > keylen) ? 1 : -1;
if (difference == 0) {
if (lowbound != NULL)
*lowbound = stopMiddle + 1;
return stopMiddle;
} else if (difference < 0)
stopLow = stopMiddle + 1;
else
stopHigh = stopMiddle;
}
if (lowbound != NULL)
*lowbound = stopLow;
return -1;
}
Pairs* hstoreArrayToPairs(ArrayType* a, int* npairs)
{
Datum* key_datums = NULL;
bool* key_nulls = NULL;
int key_count;
Pairs* key_pairs = NULL;
int bufsiz;
int i, j;
deconstruct_array(a, TEXTOID, -1, false, 'i', &key_datums, &key_nulls, &key_count);
if (key_count == 0) {
*npairs = 0;
return NULL;
}
/*
* A text array uses at least eight bytes per element, so any overflow in
* "key_count * sizeof(Pairs)" is small enough for palloc() to catch.
* However, credible improvements to the array format could invalidate
* that assumption. Therefore, use an explicit check rather than relying
* on palloc() to complain.
*/
if (key_count > int(MaxAllocSize / sizeof(Pairs)))
ereport(ERROR,
(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
errmsg("number of pairs (%d) exceeds the maximum allowed (%d)",
key_count,
(int)(MaxAllocSize / sizeof(Pairs)))));
key_pairs = (Pairs*)palloc(sizeof(Pairs) * key_count);
for (i = 0, j = 0; i < key_count; i++) {
if (!key_nulls[i]) {
key_pairs[j].key = VARDATA(key_datums[i]);
key_pairs[j].keylen = VARSIZE(key_datums[i]) - VARHDRSZ;
key_pairs[j].val = NULL;
key_pairs[j].vallen = 0;
key_pairs[j].needfree = 0;
key_pairs[j].isnull = 1;
j++;
}
}
*npairs = hstoreUniquePairs(key_pairs, j, &bufsiz);
return key_pairs;
}
PG_FUNCTION_INFO_V1(hstore_fetchval);
extern "C" Datum hstore_fetchval(PG_FUNCTION_ARGS);
Datum hstore_fetchval(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
text* key = PG_GETARG_TEXT_PP(1);
HEntry* entries = ARRPTR(hs);
text* out = NULL;
int idx = hstoreFindKey(hs, NULL, VARDATA_ANY(key), VARSIZE_ANY_EXHDR(key));
if (idx < 0 || HS_VALISNULL(entries, idx))
PG_RETURN_NULL();
out = cstring_to_text_with_len(HS_VAL(entries, STRPTR(hs), idx), HS_VALLEN(entries, idx));
PG_RETURN_TEXT_P(out);
}
PG_FUNCTION_INFO_V1(hstore_exists);
extern "C" Datum hstore_exists(PG_FUNCTION_ARGS);
Datum hstore_exists(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
text* key = PG_GETARG_TEXT_PP(1);
int idx = hstoreFindKey(hs, NULL, VARDATA_ANY(key), VARSIZE_ANY_EXHDR(key));
PG_RETURN_BOOL(idx >= 0);
}
PG_FUNCTION_INFO_V1(hstore_exists_any);
extern "C" Datum hstore_exists_any(PG_FUNCTION_ARGS);
Datum hstore_exists_any(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
ArrayType* keys = PG_GETARG_ARRAYTYPE_P(1);
int nkeys;
Pairs* key_pairs = hstoreArrayToPairs(keys, &nkeys);
int i;
int lowbound = 0;
bool res = false;
/*
* we exploit the fact that the pairs list is already sorted into strictly
* increasing order to narrow the hstoreFindKey search; each search can
* start one entry past the previous "found" entry, or at the lower bound
* of the last search.
*/
for (i = 0; i < nkeys; i++) {
int idx = hstoreFindKey(hs, &lowbound, key_pairs[i].key, key_pairs[i].keylen);
if (idx >= 0) {
res = true;
break;
}
}
PG_RETURN_BOOL(res);
}
PG_FUNCTION_INFO_V1(hstore_exists_all);
extern "C" Datum hstore_exists_all(PG_FUNCTION_ARGS);
Datum hstore_exists_all(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
ArrayType* keys = PG_GETARG_ARRAYTYPE_P(1);
int nkeys;
Pairs* key_pairs = hstoreArrayToPairs(keys, &nkeys);
int i;
int lowbound = 0;
bool res = true;
/*
* we exploit the fact that the pairs list is already sorted into strictly
* increasing order to narrow the hstoreFindKey search; each search can
* start one entry past the previous "found" entry, or at the lower bound
* of the last search.
*/
for (i = 0; i < nkeys; i++) {
int idx = hstoreFindKey(hs, &lowbound, key_pairs[i].key, key_pairs[i].keylen);
if (idx < 0) {
res = false;
break;
}
}
PG_RETURN_BOOL(res);
}
PG_FUNCTION_INFO_V1(hstore_defined);
extern "C" Datum hstore_defined(PG_FUNCTION_ARGS);
Datum hstore_defined(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
text* key = PG_GETARG_TEXT_PP(1);
HEntry* entries = ARRPTR(hs);
int idx = hstoreFindKey(hs, NULL, VARDATA_ANY(key), VARSIZE_ANY_EXHDR(key));
bool res = (idx >= 0 && !HS_VALISNULL(entries, idx));
PG_RETURN_BOOL(res);
}
PG_FUNCTION_INFO_V1(hstore_delete);
extern "C" Datum hstore_delete(PG_FUNCTION_ARGS);
Datum hstore_delete(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
text* key = PG_GETARG_TEXT_PP(1);
char* keyptr = VARDATA_ANY(key);
int keylen = VARSIZE_ANY_EXHDR(key);
HStore* out = (HStore*)palloc(VARSIZE(hs));
char *bufs = NULL, *bufd = NULL, *ptrd = NULL;
HEntry *es = NULL, *ed = NULL;
int i;
int count = HS_COUNT(hs);
uint32 outcount = 0;
SET_VARSIZE(out, VARSIZE(hs));
HS_SETCOUNT(out, count); /* temporary! */
bufs = STRPTR(hs);
es = ARRPTR(hs);
bufd = ptrd = STRPTR(out);
ed = ARRPTR(out);
uint32 dlen = VARSIZE(hs) - HS_COUNT((HStore*)(out)) * 2;
for (i = 0; i < count; ++i) {
int len = HS_KEYLEN(es, i);
char* ptrs = HS_KEY(es, bufs, i);
if (!(len == keylen && memcmp(ptrs, keyptr, keylen) == 0)) {
int vallen = HS_VALLEN(es, i);
HS_COPYITEM(ed, bufd, ptrd, dlen, ptrs, len, vallen, HS_VALISNULL(es, i));
++outcount;
}
}
HS_FINALIZE(out, VARSIZE(hs), outcount, bufd, ptrd);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_delete_array);
extern "C" Datum hstore_delete_array(PG_FUNCTION_ARGS);
Datum hstore_delete_array(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
HStore* out = (HStore*)palloc(VARSIZE(hs));
int hs_count = HS_COUNT(hs);
char *ps = NULL, *bufd = NULL, *pd = NULL;
HEntry *es = NULL, *ed = NULL;
int i, j;
uint32 outcount = 0;
ArrayType* key_array = PG_GETARG_ARRAYTYPE_P(1);
int nkeys;
Pairs* key_pairs = hstoreArrayToPairs(key_array, &nkeys);
SET_VARSIZE(out, VARSIZE(hs));
HS_SETCOUNT(out, hs_count); /* temporary! */
ps = STRPTR(hs);
es = ARRPTR(hs);
bufd = pd = STRPTR(out);
ed = ARRPTR(out);
if (nkeys == 0) {
/* return a copy of the input, unchanged */
errno_t rc = memcpy_s(out, VARSIZE(hs), hs, VARSIZE(hs));
securec_check(rc, "", "");
HS_FIXSIZE(out, hs_count);
HS_SETCOUNT(out, hs_count);
PG_RETURN_POINTER(out);
}
/*
* this is in effect a merge between hs and key_pairs, both of which are
* already sorted by (keylen,key); we take keys from hs only
*/
uint32 dlen = VARSIZE(hs) - HS_COUNT((HStore*)(out)) * 2;
for (i = j = 0; i < hs_count;) {
int difference;
if (j >= nkeys)
difference = -1;
else {
uint32 skeylen = HS_KEYLEN(es, i);
if (skeylen == key_pairs[j].keylen)
difference = memcmp(HS_KEY(es, ps, i), key_pairs[j].key, key_pairs[j].keylen);
else
difference = (skeylen > key_pairs[j].keylen) ? 1 : -1;
}
if (difference > 0)
++j;
else if (difference == 0)
++i, ++j;
else {
HS_COPYITEM(ed, bufd, pd, dlen, HS_KEY(es, ps, i), HS_KEYLEN(es, i), HS_VALLEN(es, i), HS_VALISNULL(es, i));
++outcount;
++i;
}
}
HS_FINALIZE(out, VARSIZE(hs), outcount, bufd, pd);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_delete_hstore);
extern "C" Datum hstore_delete_hstore(PG_FUNCTION_ARGS);
Datum hstore_delete_hstore(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
HStore* hs2 = PG_GETARG_HS(1);
NOT_NULL_HS(hs);
NOT_NULL_HS(hs2);
HStore* out = (HStore*)palloc(VARSIZE(hs));
int hs_count = HS_COUNT(hs);
int hs2_count = HS_COUNT(hs2);
char *ps = NULL, *ps2 = NULL, *bufd = NULL, *pd = NULL;
HEntry *es = NULL, *es2 = NULL, *ed = NULL;
int i, j;
uint32 outcount = 0;
SET_VARSIZE(out, VARSIZE(hs));
HS_SETCOUNT(out, hs_count); /* temporary! */
ps = STRPTR(hs);
es = ARRPTR(hs);
ps2 = STRPTR(hs2);
es2 = ARRPTR(hs2);
bufd = pd = STRPTR(out);
ed = ARRPTR(out);
if (hs2_count == 0) {
/* return a copy of the input, unchanged */
errno_t rc = memcpy_s(out, VARSIZE(hs), hs, VARSIZE(hs));
securec_check(rc, "", "");
HS_FIXSIZE(out, hs_count);
HS_SETCOUNT(out, hs_count);
PG_RETURN_POINTER(out);
}
/*
* this is in effect a merge between hs and hs2, both of which are already
* sorted by (keylen,key); we take keys from hs only; for equal keys, we
* take the value from hs unless the values are equal
*/
uint32 dlen = VARSIZE(hs) - HS_COUNT((HStore*)(out)) * 2;
for (i = j = 0; i < hs_count;) {
int difference;
if (j >= hs2_count)
difference = -1;
else {
int skeylen = HS_KEYLEN(es, i);
int s2keylen = HS_KEYLEN(es2, j);
if (skeylen == s2keylen)
difference = memcmp(HS_KEY(es, ps, i), HS_KEY(es2, ps2, j), skeylen);
else
difference = (skeylen > s2keylen) ? 1 : -1;
}
if (difference > 0)
++j;
else if (difference == 0) {
uint32 svallen = HS_VALLEN(es, i);
int snullval = HS_VALISNULL(es, i);
if (snullval != HS_VALISNULL(es2, j) ||
(!snullval &&
(svallen != HS_VALLEN(es2, j) || memcmp(HS_VAL(es, ps, i), HS_VAL(es2, ps2, j), svallen) != 0))) {
HS_COPYITEM(ed, bufd, pd, dlen, HS_KEY(es, ps, i), HS_KEYLEN(es, i), svallen, snullval);
++outcount;
}
++i, ++j;
} else {
HS_COPYITEM(ed, bufd, pd, dlen, HS_KEY(es, ps, i), HS_KEYLEN(es, i), HS_VALLEN(es, i), HS_VALISNULL(es, i));
++outcount;
++i;
}
}
HS_FINALIZE(out, VARSIZE(hs), outcount, bufd, pd);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_concat);
extern "C" Datum hstore_concat(PG_FUNCTION_ARGS);
Datum hstore_concat(PG_FUNCTION_ARGS)
{
HStore* s1 = PG_GETARG_HS(0);
HStore* s2 = PG_GETARG_HS(1);
if (NULL == s1 && NULL == s2) {
PG_RETURN_NULL();
}
if (NULL == s1) {
PG_RETURN_POINTER(s2);
}
if (NULL == s2) {
PG_RETURN_POINTER(s1);
}
HStore* out = (HStore*)palloc(VARSIZE(s1) + VARSIZE(s2));
char *ps1 = NULL, *ps2 = NULL, *bufd = NULL, *pd = NULL;
HEntry *es1 = NULL, *es2 = NULL, *ed = NULL;
int s1idx;
int s2idx;
int s1count = HS_COUNT(s1);
int s2count = HS_COUNT(s2);
uint32 outcount = 0;
int rc = 0;
SET_VARSIZE(out, VARSIZE(s1) + VARSIZE(s2) - HSHRDSIZE);
HS_SETCOUNT(out, s1count + s2count);
if (s1count == 0) {
/* return a copy of the input, unchanged */
rc = memcpy_s(out, VARSIZE(out), s2, VARSIZE(s2));
securec_check(rc, "", "");
HS_FIXSIZE(out, s2count);
HS_SETCOUNT(out, s2count);
PG_RETURN_POINTER(out);
}
if (s2count == 0) {
/* return a copy of the input, unchanged */
rc = memcpy_s(out, VARSIZE(out), s1, VARSIZE(s1));
securec_check(rc, "", "");
HS_FIXSIZE(out, s1count);
HS_SETCOUNT(out, s1count);
PG_RETURN_POINTER(out);
}
ps1 = STRPTR(s1);
ps2 = STRPTR(s2);
bufd = pd = STRPTR(out);
es1 = ARRPTR(s1);
es2 = ARRPTR(s2);
ed = ARRPTR(out);
/*
* this is in effect a merge between s1 and s2, both of which are already
* sorted by (keylen,key); we take s2 for equal keys
*/
uint32 dlen = VARSIZE(s1) + VARSIZE(s2) - HSHRDSIZE - HS_COUNT((HStore*)(out)) * 2;
for (s1idx = s2idx = 0; s1idx < s1count || s2idx < s2count; ++outcount) {
int difference;
if (s1idx >= s1count)
difference = 1;
else if (s2idx >= s2count)
difference = -1;
else {
int s1keylen = HS_KEYLEN(es1, s1idx);
int s2keylen = HS_KEYLEN(es2, s2idx);
if (s1keylen == s2keylen)
difference = memcmp(HS_KEY(es1, ps1, s1idx), HS_KEY(es2, ps2, s2idx), s1keylen);
else
difference = (s1keylen > s2keylen) ? 1 : -1;
}
if (difference >= 0) {
HS_COPYITEM(ed,
bufd,
pd,
dlen,
HS_KEY(es2, ps2, s2idx),
HS_KEYLEN(es2, s2idx),
HS_VALLEN(es2, s2idx),
HS_VALISNULL(es2, s2idx));
++s2idx;
if (difference == 0)
++s1idx;
} else {
HS_COPYITEM(ed,
bufd,
pd,
dlen,
HS_KEY(es1, ps1, s1idx),
HS_KEYLEN(es1, s1idx),
HS_VALLEN(es1, s1idx),
HS_VALISNULL(es1, s1idx));
++s1idx;
}
}
HS_FINALIZE(out, VARSIZE(s1) + VARSIZE(s2) - HSHRDSIZE, outcount, bufd, pd);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_slice_to_array);
extern "C" Datum hstore_slice_to_array(PG_FUNCTION_ARGS);
Datum hstore_slice_to_array(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
HEntry* entries = ARRPTR(hs);
char* ptr = STRPTR(hs);
ArrayType* key_array = PG_GETARG_ARRAYTYPE_P(1);
ArrayType* aout = NULL;
Datum* key_datums = NULL;
bool* key_nulls = NULL;
Datum* out_datums = NULL;
bool* out_nulls = NULL;
int key_count;
int i;
deconstruct_array(key_array, TEXTOID, -1, false, 'i', &key_datums, &key_nulls, &key_count);
if (key_count == 0) {
aout = construct_empty_array(TEXTOID);
PG_RETURN_POINTER(aout);
}
out_datums = (Datum*)palloc(sizeof(Datum) * key_count);
out_nulls = (bool*)palloc(sizeof(bool) * key_count);
for (i = 0; i < key_count; ++i) {
text* key = (text*)DatumGetPointer(key_datums[i]);
int idx;
if (key_nulls[i])
idx = -1;
else
idx = hstoreFindKey(hs, NULL, VARDATA(key), VARSIZE(key) - VARHDRSZ);
if (idx < 0 || HS_VALISNULL(entries, idx)) {
out_nulls[i] = true;
out_datums[i] = (Datum)0;
} else {
out_datums[i] =
PointerGetDatum(cstring_to_text_with_len(HS_VAL(entries, ptr, idx), HS_VALLEN(entries, idx)));
out_nulls[i] = false;
}
}
aout = construct_md_array(out_datums,
out_nulls,
ARR_NDIM(key_array),
ARR_DIMS(key_array),
ARR_LBOUND(key_array),
TEXTOID,
-1,
false,
'i');
PG_RETURN_POINTER(aout);
}
PG_FUNCTION_INFO_V1(hstore_slice_to_hstore);
extern "C" Datum hstore_slice_to_hstore(PG_FUNCTION_ARGS);
Datum hstore_slice_to_hstore(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
HEntry* entries = ARRPTR(hs);
char* ptr = STRPTR(hs);
ArrayType* key_array = PG_GETARG_ARRAYTYPE_P(1);
HStore* out = NULL;
int nkeys;
Pairs* key_pairs = hstoreArrayToPairs(key_array, &nkeys);
Pairs* out_pairs = NULL;
int bufsiz;
int lastidx = 0;
int i;
int out_count = 0;
if (nkeys == 0) {
out = hstorePairs(NULL, 0, 0);
PG_RETURN_POINTER(out);
}
/* hstoreArrayToPairs() checked overflow */
out_pairs = (Pairs*)palloc(sizeof(Pairs) * nkeys);
bufsiz = 0;
/*
* we exploit the fact that the pairs list is already sorted into strictly
* increasing order to narrow the hstoreFindKey search; each search can
* start one entry past the previous "found" entry, or at the lower bound
* of the last search.
*/
for (i = 0; i < nkeys; ++i) {
int idx = hstoreFindKey(hs, &lastidx, key_pairs[i].key, key_pairs[i].keylen);
if (idx >= 0) {
out_pairs[out_count].key = key_pairs[i].key;
bufsiz += (out_pairs[out_count].keylen = key_pairs[i].keylen);
out_pairs[out_count].val = HS_VAL(entries, ptr, idx);
bufsiz += (out_pairs[out_count].vallen = HS_VALLEN(entries, idx));
out_pairs[out_count].isnull = HS_VALISNULL(entries, idx);
out_pairs[out_count].needfree = false;
++out_count;
}
}
/*
* we don't use uniquePairs here because we know that the pairs list is
* already sorted and uniq'ed.
*/
out = hstorePairs(out_pairs, out_count, bufsiz);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_akeys);
extern "C" Datum hstore_akeys(PG_FUNCTION_ARGS);
Datum hstore_akeys(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
Datum* d = NULL;
ArrayType* a = NULL;
HEntry* entries = ARRPTR(hs);
char* base = STRPTR(hs);
int count = HS_COUNT(hs);
int i;
if (count == 0) {
a = construct_empty_array(TEXTOID);
PG_RETURN_POINTER(a);
}
d = (Datum*)palloc(sizeof(Datum) * count);
for (i = 0; i < count; ++i) {
text* item = cstring_to_text_with_len(HS_KEY(entries, base, i), HS_KEYLEN(entries, i));
d[i] = PointerGetDatum(item);
}
a = construct_array(d, count, TEXTOID, -1, false, 'i');
PG_RETURN_POINTER(a);
}
PG_FUNCTION_INFO_V1(hstore_avals);
extern "C" Datum hstore_avals(PG_FUNCTION_ARGS);
Datum hstore_avals(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
Datum* d = NULL;
bool* nulls = NULL;
ArrayType* a = NULL;
HEntry* entries = ARRPTR(hs);
char* base = STRPTR(hs);
int count = HS_COUNT(hs);
int lb = 1;
int i;
if (count == 0) {
a = construct_empty_array(TEXTOID);
PG_RETURN_POINTER(a);
}
d = (Datum*)palloc(sizeof(Datum) * count);
nulls = (bool*)palloc(sizeof(bool) * count);
for (i = 0; i < count; ++i) {
if (HS_VALISNULL(entries, i)) {
d[i] = (Datum)0;
nulls[i] = true;
} else {
text* item = cstring_to_text_with_len(HS_VAL(entries, base, i), HS_VALLEN(entries, i));
d[i] = PointerGetDatum(item);
nulls[i] = false;
}
}
a = construct_md_array(d, nulls, 1, &count, &lb, TEXTOID, -1, false, 'i');
PG_RETURN_POINTER(a);
}
static ArrayType* hstore_to_array_internal(HStore* hs, int ndims)
{
NOT_NULL_HS(hs);
HEntry* entries = ARRPTR(hs);
char* base = STRPTR(hs);
int count = HS_COUNT(hs);
int out_size[2] = {0, 2};
int lb[2] = {1, 1};
Datum* out_datums = NULL;
bool* out_nulls = NULL;
int i;
Assert(ndims < 3);
if (count == 0 || ndims == 0)
return construct_empty_array(TEXTOID);
out_size[0] = count * 2 / ndims;
out_datums = (Datum*)palloc(sizeof(Datum) * count * 2);
out_nulls = (bool*)palloc(sizeof(bool) * count * 2);
for (i = 0; i < count; ++i) {
text* key = cstring_to_text_with_len(HS_KEY(entries, base, i), HS_KEYLEN(entries, i));
out_datums[i * 2] = PointerGetDatum(key);
out_nulls[i * 2] = false;
if (HS_VALISNULL(entries, i)) {
out_datums[i * 2 + 1] = (Datum)0;
out_nulls[i * 2 + 1] = true;
} else {
text* item = cstring_to_text_with_len(HS_VAL(entries, base, i), HS_VALLEN(entries, i));
out_datums[i * 2 + 1] = PointerGetDatum(item);
out_nulls[i * 2 + 1] = false;
}
}
return construct_md_array(out_datums, out_nulls, ndims, out_size, lb, TEXTOID, -1, false, 'i');
}
PG_FUNCTION_INFO_V1(hstore_to_array);
extern "C" Datum hstore_to_array(PG_FUNCTION_ARGS);
Datum hstore_to_array(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
ArrayType* out = hstore_to_array_internal(hs, 1);
PG_RETURN_POINTER(out);
}
PG_FUNCTION_INFO_V1(hstore_to_matrix);
extern "C" Datum hstore_to_matrix(PG_FUNCTION_ARGS);
Datum hstore_to_matrix(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
ArrayType* out = hstore_to_array_internal(hs, 2);
PG_RETURN_POINTER(out);
}
/*
* Common initialization function for the various set-returning
* funcs. fcinfo is only passed if the function is to return a
* composite; it will be used to look up the return tupledesc.
* we stash a copy of the hstore in the multi-call context in
* case it was originally toasted. (At least I assume that's why;
* there was no explanatory comment in the original code. --AG)
*/
static void setup_firstcall(FuncCallContext* funcctx, HStore* hs, FunctionCallInfoData* fcinfo)
{
MemoryContext oldcontext;
HStore* st = NULL;
NOT_NULL_HS(hs);
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
st = (HStore*)palloc(VARSIZE(hs));
errno_t rc = memcpy_s(st, VARSIZE(hs), hs, VARSIZE(hs));
securec_check(rc, "", "");
funcctx->user_fctx = (void*)st;
if (fcinfo != NULL) {
TupleDesc tupdesc;
/* Build a tuple descriptor for our result type */
if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
elog(ERROR, "return type must be a row type");
funcctx->tuple_desc = BlessTupleDesc(tupdesc);
}
MemoryContextSwitchTo(oldcontext);
}
PG_FUNCTION_INFO_V1(hstore_skeys);
extern "C" Datum hstore_skeys(PG_FUNCTION_ARGS);
Datum hstore_skeys(PG_FUNCTION_ARGS)
{
FuncCallContext* funcctx = NULL;
HStore* hs = NULL;
uint32 i;
if (SRF_IS_FIRSTCALL()) {
hs = PG_GETARG_HS(0);
funcctx = SRF_FIRSTCALL_INIT();
setup_firstcall(funcctx, hs, NULL);
}
funcctx = SRF_PERCALL_SETUP();
hs = (HStore*)funcctx->user_fctx;
i = funcctx->call_cntr;
if (i < HS_COUNT(hs)) {
HEntry* entries = ARRPTR(hs);
text* item = NULL;
item = cstring_to_text_with_len(HS_KEY(entries, STRPTR(hs), i), HS_KEYLEN(entries, i));
SRF_RETURN_NEXT(funcctx, PointerGetDatum(item));
}
SRF_RETURN_DONE(funcctx);
}
PG_FUNCTION_INFO_V1(hstore_svals);
extern "C" Datum hstore_svals(PG_FUNCTION_ARGS);
Datum hstore_svals(PG_FUNCTION_ARGS)
{
FuncCallContext* funcctx = NULL;
HStore* hs = NULL;
uint32 i;
if (SRF_IS_FIRSTCALL()) {
hs = PG_GETARG_HS(0);
funcctx = SRF_FIRSTCALL_INIT();
setup_firstcall(funcctx, hs, NULL);
}
funcctx = SRF_PERCALL_SETUP();
hs = (HStore*)funcctx->user_fctx;
i = funcctx->call_cntr;
if (i < HS_COUNT(hs)) {
HEntry* entries = ARRPTR(hs);
if (HS_VALISNULL(entries, i)) {
ReturnSetInfo* rsi = NULL;
/* ugly ugly ugly. why no macro for this? */
(funcctx)->call_cntr++;
rsi = (ReturnSetInfo*)fcinfo->resultinfo;
rsi->isDone = ExprMultipleResult;
PG_RETURN_NULL();
} else {
text* item = NULL;
item = cstring_to_text_with_len(HS_VAL(entries, STRPTR(hs), i), HS_VALLEN(entries, i));
SRF_RETURN_NEXT(funcctx, PointerGetDatum(item));
}
}
SRF_RETURN_DONE(funcctx);
}
PG_FUNCTION_INFO_V1(hstore_contains);
extern "C" Datum hstore_contains(PG_FUNCTION_ARGS);
Datum hstore_contains(PG_FUNCTION_ARGS)
{
HStore* val = PG_GETARG_HS(0);
HStore* tmpl = PG_GETARG_HS(1);
NOT_NULL_HS(val);
NOT_NULL_HS(tmpl);
bool res = true;
HEntry* te = ARRPTR(tmpl);
char* tstr = STRPTR(tmpl);
HEntry* ve = ARRPTR(val);
char* vstr = STRPTR(val);
int tcount = HS_COUNT(tmpl);
int lastidx = 0;
int i;
/*
* we exploit the fact that keys in "tmpl" are in strictly increasing
* order to narrow the hstoreFindKey search; each search can start one
* entry past the previous "found" entry, or at the lower bound of the
* search
*/
for (i = 0; res && i < tcount; ++i) {
int idx = hstoreFindKey(val, &lastidx, HS_KEY(te, tstr, i), HS_KEYLEN(te, i));
if (idx >= 0) {
bool nullval = HS_VALISNULL(te, i);
uint32 vallen = HS_VALLEN(te, i);
if (nullval != HS_VALISNULL(ve, idx) ||
(!nullval &&
(vallen != HS_VALLEN(ve, idx) || memcmp(HS_VAL(te, tstr, i), HS_VAL(ve, vstr, idx), vallen))))
res = false;
} else
res = false;
}
PG_RETURN_BOOL(res);
}
PG_FUNCTION_INFO_V1(hstore_contained);
extern "C" Datum hstore_contained(PG_FUNCTION_ARGS);
Datum hstore_contained(PG_FUNCTION_ARGS)
{
PG_RETURN_DATUM(DirectFunctionCall2(hstore_contains, PG_GETARG_DATUM(1), PG_GETARG_DATUM(0)));
}
PG_FUNCTION_INFO_V1(hstore_each);
extern "C" Datum hstore_each(PG_FUNCTION_ARGS);
Datum hstore_each(PG_FUNCTION_ARGS)
{
FuncCallContext* funcctx = NULL;
HStore* hs = NULL;
uint32 i;
if (SRF_IS_FIRSTCALL()) {
hs = PG_GETARG_HS(0);
funcctx = SRF_FIRSTCALL_INIT();
setup_firstcall(funcctx, hs, fcinfo);
}
funcctx = SRF_PERCALL_SETUP();
hs = (HStore*)funcctx->user_fctx;
i = funcctx->call_cntr;
if (i < HS_COUNT(hs)) {
HEntry* entries = ARRPTR(hs);
char* ptr = STRPTR(hs);
Datum res, dvalues[2];
bool nulls[2] = {false, false};
text* item = NULL;
HeapTuple tuple;
item = cstring_to_text_with_len(HS_KEY(entries, ptr, i), HS_KEYLEN(entries, i));
dvalues[0] = PointerGetDatum(item);
if (HS_VALISNULL(entries, i)) {
dvalues[1] = (Datum)0;
nulls[1] = true;
} else {
item = cstring_to_text_with_len(HS_VAL(entries, ptr, i), HS_VALLEN(entries, i));
dvalues[1] = PointerGetDatum(item);
}
tuple = heap_form_tuple(funcctx->tuple_desc, dvalues, nulls);
res = HeapTupleGetDatum(tuple);
SRF_RETURN_NEXT(funcctx, PointerGetDatum(res));
}
SRF_RETURN_DONE(funcctx);
}
/*
* btree sort order for hstores isn't intended to be useful; we really only
* care about equality versus non-equality. we compare the entire string
* buffer first, then the entry pos array.
*/
PG_FUNCTION_INFO_V1(hstore_cmp);
extern "C" Datum hstore_cmp(PG_FUNCTION_ARGS);
Datum hstore_cmp(PG_FUNCTION_ARGS)
{
HStore* hs1 = PG_GETARG_HS(0);
HStore* hs2 = PG_GETARG_HS(1);
NOT_NULL_HS(hs1);
NOT_NULL_HS(hs2);
int hcount1 = HS_COUNT(hs1);
int hcount2 = HS_COUNT(hs2);
int res = 0;
if (hcount1 == 0 || hcount2 == 0) {
/*
* if either operand is empty, and the other is nonempty, the nonempty
* one is larger. If both are empty they are equal.
*/
if (hcount1 > 0)
res = 1;
else if (hcount2 > 0)
res = -1;
} else {
/* here we know both operands are nonempty */
char* str1 = STRPTR(hs1);
char* str2 = STRPTR(hs2);
HEntry* ent1 = ARRPTR(hs1);
HEntry* ent2 = ARRPTR(hs2);
size_t len1 = HSE_ENDPOS(ent1[2 * hcount1 - 1]);
size_t len2 = HSE_ENDPOS(ent2[2 * hcount2 - 1]);
res = memcmp(str1, str2, Min(len1, len2));
if (res == 0) {
if (len1 > len2)
res = 1;
else if (len1 < len2)
res = -1;
else if (hcount1 > hcount2)
res = 1;
else if (hcount2 > hcount1)
res = -1;
else {
int count = hcount1 * 2;
int i;
for (i = 0; i < count; ++i)
if (HSE_ENDPOS(ent1[i]) != HSE_ENDPOS(ent2[i]) || HSE_ISNULL(ent1[i]) != HSE_ISNULL(ent2[i]))
break;
if (i < count) {
if (HSE_ENDPOS(ent1[i]) < HSE_ENDPOS(ent2[i]))
res = -1;
else if (HSE_ENDPOS(ent1[i]) > HSE_ENDPOS(ent2[i]))
res = 1;
else if (HSE_ISNULL(ent1[i]))
res = 1;
else if (HSE_ISNULL(ent2[i]))
res = -1;
}
}
} else {
res = (res > 0) ? 1 : -1;
}
}
/*
* this is a btree support function; this is one of the few places where
* memory needs to be explicitly freed.
*/
PG_FREE_IF_COPY(hs1, 0);
PG_FREE_IF_COPY(hs2, 1);
PG_RETURN_INT32(res);
}
PG_FUNCTION_INFO_V1(hstore_eq);
extern "C" Datum hstore_eq(PG_FUNCTION_ARGS);
Datum hstore_eq(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res == 0);
}
PG_FUNCTION_INFO_V1(hstore_ne);
extern "C" Datum hstore_ne(PG_FUNCTION_ARGS);
Datum hstore_ne(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res != 0);
}
PG_FUNCTION_INFO_V1(hstore_gt);
extern "C" Datum hstore_gt(PG_FUNCTION_ARGS);
Datum hstore_gt(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res > 0);
}
PG_FUNCTION_INFO_V1(hstore_ge);
extern "C" Datum hstore_ge(PG_FUNCTION_ARGS);
Datum hstore_ge(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res >= 0);
}
PG_FUNCTION_INFO_V1(hstore_lt);
extern "C" Datum hstore_lt(PG_FUNCTION_ARGS);
Datum hstore_lt(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res < 0);
}
PG_FUNCTION_INFO_V1(hstore_le);
extern "C" Datum hstore_le(PG_FUNCTION_ARGS);
Datum hstore_le(PG_FUNCTION_ARGS)
{
int res = DatumGetInt32(DirectFunctionCall2(hstore_cmp, PG_GETARG_DATUM(0), PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res <= 0);
}
PG_FUNCTION_INFO_V1(hstore_hash);
extern "C" Datum hstore_hash(PG_FUNCTION_ARGS);
Datum hstore_hash(PG_FUNCTION_ARGS)
{
HStore* hs = PG_GETARG_HS(0);
NOT_NULL_HS(hs);
Datum hval = hash_any((unsigned char*)VARDATA(hs), VARSIZE(hs) - VARHDRSZ);
/*
* this is the only place in the code that cares whether the overall
* varlena size exactly matches the true data size; this assertion should
* be maintained by all the other code, but we make it explicit here.
*/
Assert(VARSIZE(hs) ==
((HS_COUNT(hs) != 0) ? CALCDATASIZE(HS_COUNT(hs), HSE_ENDPOS(ARRPTR(hs)[2 * HS_COUNT(hs) - 1])) : HSHRDSIZE));
PG_FREE_IF_COPY(hs, 0);
PG_RETURN_DATUM(hval);
}
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