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xpu_textlib.cu
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/*
* xpu_textlib.cu
*
* Collection of text functions and operators for both of GPU and DPU
* ----
* Copyright 2011-2023 (C) KaiGai Kohei <[email protected]>
* Copyright 2014-2023 (C) PG-Strom Developers Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the PostgreSQL License.
*
*/
#include "xpu_common.h"
/*
* Arrow handlers
*/
STATIC_FUNCTION(bool)
__xpu_varlena_datum_arrow_ref(kern_context *kcxt,
const kern_data_store *kds,
const kern_colmeta *cmeta,
uint32_t kds_index,
int *p_length,
const char **p_value)
{
uint32_t unitsz;
switch (cmeta->attopts.tag)
{
case ArrowType__FixedSizeBinary:
unitsz = cmeta->attopts.fixed_size_binary.byteWidth;
*p_value = (const char *)
KDS_ARROW_REF_SIMPLE_DATUM(kds, cmeta, kds_index, unitsz);
*p_length = unitsz;
break;
case ArrowType__Utf8:
case ArrowType__Binary:
*p_value = (const char *)
KDS_ARROW_REF_VARLENA32_DATUM(kds, cmeta, kds_index, p_length);
break;
case ArrowType__LargeUtf8:
case ArrowType__LargeBinary:
*p_value = (const char *)
KDS_ARROW_REF_VARLENA64_DATUM(kds, cmeta, kds_index, p_length);
break;
default:
STROM_ELOG(kcxt, "not a mappable Arrow data type");
return false;
}
return true;
}
/*
* bpchar type handlers
*/
INLINE_FUNCTION(int)
bpchar_truelen(const char *s, int len)
{
int i;
for (i = len - 1; i >= 0; i--)
{
if (s[i] != ' ')
break;
}
return i + 1;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_heap_read(kern_context *kcxt,
const void *addr,
xpu_datum_t *__result)
{
xpu_bpchar_t *result = (xpu_bpchar_t *)__result;
if (VARATT_IS_EXTERNAL(addr) || VARATT_IS_COMPRESSED(addr))
{
result->value = (const char *)addr;
result->length = -1;
}
else
{
result->value = VARDATA_ANY(addr);
result->length = bpchar_truelen(result->value, VARSIZE_ANY_EXHDR(addr));
}
result->expr_ops = &xpu_bpchar_ops;
return true;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_arrow_read(kern_context *kcxt,
const kern_data_store *kds,
const kern_colmeta *cmeta,
uint32_t kds_index,
xpu_datum_t *__result)
{
xpu_bpchar_t *result = (xpu_bpchar_t *)__result;
if (!__xpu_varlena_datum_arrow_ref(kcxt, kds, cmeta,
kds_index,
&result->length,
&result->value))
return false;
result->expr_ops = (result->value ? &xpu_bpchar_ops : NULL);
return true;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_kvec_load(kern_context *kcxt,
const kvec_datum_t *__kvecs,
uint32_t kvecs_id,
xpu_datum_t *__result)
{
const kvec_bpchar_t *kvecs = (const kvec_bpchar_t *)__kvecs;
xpu_bpchar_t *result = (xpu_bpchar_t *)__result;
result->expr_ops = &xpu_bpchar_ops;
result->length = kvecs->length[kvecs_id];
result->value = kvecs->values[kvecs_id];
return true;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_kvec_save(kern_context *kcxt,
const xpu_datum_t *__xdatum,
kvec_datum_t *__kvecs,
uint32_t kvecs_id)
{
const xpu_bpchar_t *xdatum = (const xpu_bpchar_t *)__xdatum;
kvec_bpchar_t *kvecs = (kvec_bpchar_t *)__kvecs;
kvecs->length[kvecs_id] = xdatum->length;
kvecs->values[kvecs_id] = xdatum->value;
return true;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_kvec_copy(kern_context *kcxt,
const kvec_datum_t *__kvecs_src,
uint32_t kvecs_src_id,
kvec_datum_t *__kvecs_dst,
uint32_t kvecs_dst_id)
{
const kvec_bpchar_t *kvecs_src = (const kvec_bpchar_t *)__kvecs_src;
kvec_bpchar_t *kvecs_dst = (kvec_bpchar_t *)__kvecs_dst;
kvecs_dst->length[kvecs_dst_id] = kvecs_src->length[kvecs_src_id];
kvecs_dst->values[kvecs_dst_id] = kvecs_src->values[kvecs_src_id];
return true;
}
STATIC_FUNCTION(int)
xpu_bpchar_datum_write(kern_context *kcxt,
char *buffer,
const kern_colmeta *cmeta,
const xpu_datum_t *__arg)
{
const xpu_bpchar_t *arg = (const xpu_bpchar_t *)__arg;
int nbytes;
if (arg->length < 0)
{
nbytes = VARSIZE_ANY(arg->value);
if (buffer)
memcpy(buffer, arg->value, nbytes);
}
else
{
int sz = VARHDRSZ + arg->length;
nbytes = Max(sz, cmeta->atttypmod);
if (buffer)
{
memcpy(buffer+VARHDRSZ, arg->value, arg->length);
if (sz < cmeta->atttypmod)
memset(buffer+sz, ' ', cmeta->atttypmod - sz);
SET_VARSIZE(buffer, nbytes);
}
}
return nbytes;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_hash(kern_context*kcxt,
uint32_t *p_hash,
xpu_datum_t *__arg)
{
xpu_bpchar_t *arg = (xpu_bpchar_t *)__arg;
if (XPU_DATUM_ISNULL(arg))
*p_hash = 0;
else if (xpu_bpchar_is_valid(kcxt, arg))
*p_hash = pg_hash_any(arg->value, arg->length);
else
return false;
return true;
}
STATIC_FUNCTION(bool)
xpu_bpchar_datum_comp(kern_context *kcxt,
int *p_comp,
xpu_datum_t *__str1,
xpu_datum_t *__str2)
{
xpu_bpchar_t *str1 = (xpu_bpchar_t *)__str1;
xpu_bpchar_t *str2 = (xpu_bpchar_t *)__str2;
int sz1, sz2;
int comp;
if (!xpu_bpchar_is_valid(kcxt, str1) ||
!xpu_bpchar_is_valid(kcxt, str2))
return false;
sz1 = bpchar_truelen(str1->value, str1->length);
sz2 = bpchar_truelen(str2->value, str2->length);
comp = __memcmp(str1->value, str2->value, Min(sz1, sz2));
if (comp == 0)
{
if (sz1 < sz2)
comp = -1;
else if (sz1 > sz2)
comp = 1;
}
*p_comp = comp;
return true;
}
PGSTROM_SQLTYPE_OPERATORS(bpchar, false, 4, -1);
/*
* xpu_text_t device type handler
*/
STATIC_FUNCTION(bool)
xpu_text_datum_heap_read(kern_context *kcxt,
const void *addr,
xpu_datum_t *__result)
{
xpu_text_t *result = (xpu_text_t *)__result;
if (VARATT_IS_EXTERNAL(addr) || VARATT_IS_COMPRESSED(addr))
{
result->value = (const char *)addr;
result->length = -1;
}
else
{
result->value = VARDATA_ANY(addr);
result->length = VARSIZE_ANY_EXHDR(addr);
}
result->expr_ops = &xpu_text_ops;
return true;
}
STATIC_FUNCTION(bool)
xpu_text_datum_arrow_read(kern_context *kcxt,
const kern_data_store *kds,
const kern_colmeta *cmeta,
uint32_t kds_index,
xpu_datum_t *__result)
{
xpu_text_t *result = (xpu_text_t *)__result;
if (!__xpu_varlena_datum_arrow_ref(kcxt, kds, cmeta,
kds_index,
&result->length,
&result->value))
return false;
result->expr_ops = (result->value ? &xpu_text_ops : NULL);
return true;
}
STATIC_FUNCTION(bool)
xpu_text_datum_kvec_load(kern_context *kcxt,
const kvec_datum_t *__kvecs,
uint32_t kvecs_id,
xpu_datum_t *__result)
{
const kvec_text_t *kvecs = (const kvec_text_t *)__kvecs;
xpu_text_t *result = (xpu_text_t *)__result;
result->expr_ops = &xpu_text_ops;
result->length = kvecs->length[kvecs_id];
result->value = kvecs->values[kvecs_id];
return true;
}
STATIC_FUNCTION(bool)
xpu_text_datum_kvec_save(kern_context *kcxt,
const xpu_datum_t *__xdatum,
kvec_datum_t *__kvecs,
uint32_t kvecs_id)
{
const xpu_text_t *xdatum = (const xpu_text_t *)__xdatum;
kvec_text_t *kvecs = (kvec_text_t *)__kvecs;
kvecs->length[kvecs_id] = xdatum->length;
kvecs->values[kvecs_id] = xdatum->value;
return true;
}
STATIC_FUNCTION(bool)
xpu_text_datum_kvec_copy(kern_context *kcxt,
const kvec_datum_t *__kvecs_src,
uint32_t kvecs_src_id,
kvec_datum_t *__kvecs_dst,
uint32_t kvecs_dst_id)
{
const kvec_text_t *kvecs_src = (const kvec_text_t *)__kvecs_src;
kvec_text_t *kvecs_dst = (kvec_text_t *)__kvecs_dst;
kvecs_dst->length[kvecs_dst_id] = kvecs_src->length[kvecs_src_id];
kvecs_dst->values[kvecs_dst_id] = kvecs_src->values[kvecs_src_id];
return true;
}
STATIC_FUNCTION(int)
xpu_text_datum_write(kern_context *kcxt,
char *buffer,
const kern_colmeta *cmeta,
const xpu_datum_t *__arg)
{
const xpu_text_t *arg = (const xpu_text_t *)__arg;
int nbytes;
if (arg->length < 0)
{
nbytes = VARSIZE_ANY(arg->value);
if (buffer)
memcpy(buffer, arg->value, nbytes);
}
else
{
nbytes = VARHDRSZ + arg->length;
if (buffer)
{
memcpy(buffer+VARHDRSZ, arg->value, arg->length);
SET_VARSIZE(buffer, nbytes);
}
}
return nbytes;
}
STATIC_FUNCTION(bool)
xpu_text_datum_hash(kern_context *kcxt,
uint32_t *p_hash,
xpu_datum_t *__arg)
{
xpu_text_t *arg = (xpu_text_t *)__arg;
if (XPU_DATUM_ISNULL(arg))
*p_hash = 0;
else if (xpu_text_is_valid(kcxt, arg))
*p_hash = pg_hash_any(arg->value, arg->length);
else
return false;
return true;
}
STATIC_FUNCTION(bool)
xpu_text_datum_comp(kern_context *kcxt,
int *p_comp,
xpu_datum_t *__str1,
xpu_datum_t *__str2)
{
xpu_text_t *str1 = (xpu_text_t *)__str1;
xpu_text_t *str2 = (xpu_text_t *)__str2;
int comp;
if (!xpu_text_is_valid(kcxt, str1) ||
!xpu_text_is_valid(kcxt, str2))
return false;
comp = __memcmp(str1->value, str2->value,
Min(str1->length, str2->length));
if (comp == 0)
{
if (str1->length < str2->length)
comp = -1;
if (str1->length > str2->length)
comp = 1;
}
*p_comp = comp;
return true;
}
PGSTROM_SQLTYPE_OPERATORS(text, false, 4, -1);
/*
* xpu_bytea_t device type handler
*/
STATIC_FUNCTION(bool)
xpu_bytea_datum_heap_read(kern_context *kcxt,
const void *addr,
xpu_datum_t *__result)
{
xpu_bytea_t *result = (xpu_bytea_t *)__result;
if (VARATT_IS_EXTERNAL(addr) || VARATT_IS_COMPRESSED(addr))
{
result->value = (const char *)addr;
result->length = -1;
}
else
{
result->value = VARDATA_ANY(addr);
result->length = VARSIZE_ANY_EXHDR(addr);
}
result->expr_ops = &xpu_bytea_ops;
return true;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_arrow_read(kern_context *kcxt,
const kern_data_store *kds,
const kern_colmeta *cmeta,
uint32_t kds_index,
xpu_datum_t *__result)
{
xpu_bytea_t *result = (xpu_bytea_t *)__result;
if (!__xpu_varlena_datum_arrow_ref(kcxt, kds, cmeta,
kds_index,
&result->length,
&result->value))
return false;
result->expr_ops = (result->value ? &xpu_bytea_ops : NULL);
return true;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_kvec_load(kern_context *kcxt,
const kvec_datum_t *__kvecs,
uint32_t kvecs_id,
xpu_datum_t *__result)
{
const kvec_bytea_t *kvecs = (const kvec_bytea_t *)__kvecs;
xpu_bytea_t *result = (xpu_bytea_t *)__result;
result->expr_ops = &xpu_bytea_ops;
result->length = kvecs->length[kvecs_id];
result->value = kvecs->values[kvecs_id];
return true;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_kvec_save(kern_context *kcxt,
const xpu_datum_t *__xdatum,
kvec_datum_t *__kvecs,
uint32_t kvecs_id)
{
const xpu_bytea_t *xdatum = (const xpu_bytea_t *)__xdatum;
kvec_bytea_t *kvecs = (kvec_bytea_t *)__kvecs;
kvecs->length[kvecs_id] = xdatum->length;
kvecs->values[kvecs_id] = xdatum->value;
return true;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_kvec_copy(kern_context *kcxt,
const kvec_datum_t *__kvecs_src,
uint32_t kvecs_src_id,
kvec_datum_t *__kvecs_dst,
uint32_t kvecs_dst_id)
{
const kvec_bytea_t *kvecs_src = (const kvec_bytea_t *)__kvecs_src;
kvec_bytea_t *kvecs_dst = (kvec_bytea_t *)__kvecs_dst;
kvecs_dst->length[kvecs_dst_id] = kvecs_src->length[kvecs_src_id];
kvecs_dst->values[kvecs_dst_id] = kvecs_src->values[kvecs_src_id];
return true;
}
STATIC_FUNCTION(int)
xpu_bytea_datum_write(kern_context *kcxt,
char *buffer,
const kern_colmeta *cmeta,
const xpu_datum_t *__arg)
{
const xpu_bytea_t *arg = (const xpu_bytea_t *)__arg;
int nbytes;
if (XPU_DATUM_ISNULL(arg))
return 0;
if (arg->length < 0)
{
nbytes = VARSIZE_ANY(arg->value);
if (buffer)
memcpy(buffer, arg->value, nbytes);
}
else
{
nbytes = VARHDRSZ + arg->length;
if (buffer)
{
memcpy(buffer+VARHDRSZ, arg->value, arg->length);
SET_VARSIZE(buffer, nbytes);
}
}
return nbytes;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_hash(kern_context *kcxt,
uint32_t *p_hash,
xpu_datum_t *__arg)
{
xpu_bytea_t *arg = (xpu_bytea_t *)__arg;
if (XPU_DATUM_ISNULL(arg))
*p_hash = 0;
else if (xpu_bytea_is_valid(kcxt, arg))
*p_hash = pg_hash_any(arg->value, arg->length);
else
return false;
return true;
}
STATIC_FUNCTION(bool)
xpu_bytea_datum_comp(kern_context *kcxt,
int *p_comp,
xpu_datum_t *__a,
xpu_datum_t *__b)
{
xpu_bytea_t *a = (xpu_bytea_t *)__a;
xpu_bytea_t *b = (xpu_bytea_t *)__b;
int comp;
assert(!XPU_DATUM_ISNULL(a) && !XPU_DATUM_ISNULL(b));
if (!xpu_bytea_is_valid(kcxt, a) || !xpu_bytea_is_valid(kcxt, b))
return false;
comp = __memcmp(a->value, b->value,
Min(a->length, b->length));
if (comp == 0)
{
if (a->length < b->length)
comp = -1;
else if (a->length > b->length)
comp = 1;
}
*p_comp = comp;
return true;
}
PGSTROM_SQLTYPE_OPERATORS(bytea, false, 4, -1);
/*
* Bpchar functions
*/
#define PG_BPCHAR_COMPARE_TEMPLATE(NAME,OPER) \
PUBLIC_FUNCTION(bool) \
pgfn_bpchar##NAME(XPU_PGFUNCTION_ARGS) \
{ \
KEXP_PROCESS_ARGS2(bool, bpchar, datum_a, bpchar, datum_b); \
\
if (XPU_DATUM_ISNULL(&datum_a) || XPU_DATUM_ISNULL(&datum_b)) \
{ \
__pg_simple_nullcomp_##NAME(&datum_a, &datum_b); \
} \
else \
{ \
int comp; \
\
if (!xpu_bpchar_datum_comp(kcxt, &comp, \
(xpu_datum_t *)&datum_a, \
(xpu_datum_t *)&datum_b)) \
return false; \
result->value = (comp OPER 0); \
result->expr_ops = &xpu_bool_ops; \
} \
return true; \
}
PG_BPCHAR_COMPARE_TEMPLATE(eq, ==)
PG_BPCHAR_COMPARE_TEMPLATE(ne, !=)
PG_BPCHAR_COMPARE_TEMPLATE(lt, <)
PG_BPCHAR_COMPARE_TEMPLATE(le, <=)
PG_BPCHAR_COMPARE_TEMPLATE(gt, >)
PG_BPCHAR_COMPARE_TEMPLATE(ge, >=)
PUBLIC_FUNCTION(bool)
pgfn_bpcharlen(XPU_PGFUNCTION_ARGS)
{
KEXP_PROCESS_ARGS1(int4, bpchar, datum);
if (XPU_DATUM_ISNULL(&datum))
result->expr_ops = NULL;
else if (!xpu_bpchar_is_valid(kcxt, &datum))
return false;
else
{
xpu_encode_info *encode = SESSION_ENCODE(kcxt->session);
if (!encode)
{
STROM_ELOG(kcxt, "No encoding info was supplied");
return false;
}
if (encode->enc_maxlen == 1)
result->value = datum.length;
else
{
const char *mbstr = datum.value;
int len = datum.length;
int sz = 0;
while (len > 0 && *mbstr)
{
int n = encode->enc_mblen(mbstr);
len -= n;
mbstr += n;
sz++;
}
result->value = sz;
}
result->expr_ops = &xpu_int4_ops;
}
return true;
}
/*
* Text functions
*/
#define PG_TEXT_COMPARE_TEMPLATE(NAME,OPER) \
PUBLIC_FUNCTION(bool) \
pgfn_text_##NAME(XPU_PGFUNCTION_ARGS) \
{ \
KEXP_PROCESS_ARGS2(bool, text, datum_a, text, datum_b); \
\
if (XPU_DATUM_ISNULL(&datum_a) || XPU_DATUM_ISNULL(&datum_b)) \
{ \
__pg_simple_nullcomp_##NAME(&datum_a, &datum_b); \
} \
else \
{ \
int comp; \
\
if (!xpu_text_datum_comp(kcxt, &comp, \
(xpu_datum_t *)&datum_a, \
(xpu_datum_t *)&datum_b)) \
return false; \
result->value = (comp OPER 0); \
result->expr_ops = &xpu_bool_ops; \
} \
return true; \
}
PG_TEXT_COMPARE_TEMPLATE(eq, ==)
PG_TEXT_COMPARE_TEMPLATE(ne, !=)
PG_TEXT_COMPARE_TEMPLATE(lt, <)
PG_TEXT_COMPARE_TEMPLATE(le, <=)
PG_TEXT_COMPARE_TEMPLATE(gt, >)
PG_TEXT_COMPARE_TEMPLATE(ge, >=)
PUBLIC_FUNCTION(bool)
pgfn_textlen(XPU_PGFUNCTION_ARGS)
{
KEXP_PROCESS_ARGS1(int4, text, datum);
if (XPU_DATUM_ISNULL(&datum))
result->expr_ops = NULL;
else
{
xpu_encode_info *encode = SESSION_ENCODE(kcxt->session);
int len = datum.length;
if (!encode)
{
STROM_ELOG(kcxt, "No encoding info was supplied");
return false;
}
else if (encode->enc_maxlen == 1)
{
/*
* in case of enc_maxlen == 1, byte-length is identical with
* number of characters. So, we can handle compressed or
* external varlena without decompression or de-toasting.
*/
if (len < 0)
{
if (VARATT_IS_COMPRESSED(datum.value))
{
toast_compress_header c_hdr;
memcpy(&c_hdr, VARDATA(datum.value),
sizeof(toast_compress_header));
len = TOAST_COMPRESS_EXTSIZE(&c_hdr);
}
else if (VARATT_IS_EXTERNAL(datum.value))
{
varatt_external e_hdr;
memcpy(&e_hdr, VARDATA_1B_E(datum.value),
sizeof(varatt_external));
len = (e_hdr.va_extinfo & VARLENA_EXTSIZE_MASK);
}
else
{
STROM_ELOG(kcxt, "unknown varlena format");
return false;
}
}
}
else if (len >= 0)
{
const char *mbstr = datum.value;
int sz = 0;
while (len > 0 && *mbstr)
{
int n = encode->enc_mblen(mbstr);
len -= n;
mbstr += n;
sz++;
}
len = sz;
}
else
{
STROM_ELOG(kcxt, "unable to count compressed/external text under multi-bytes encoding");
return false;
}
result->value = len;
result->expr_ops = &xpu_int4_ops;
}
return true;
}
/* ----------------------------------------------------------------
*
* Fundamental Encoding Catalog
*
* ---------------------------------------------------------------- */
STATIC_FUNCTION(int)
pg_latin_mblen(const char *s)
{
return 1;
}
STATIC_FUNCTION(int)
pg_euc_mblen(const char *s)
{
unsigned char c = *s;
if (c == 0x8e)
return 2;
if (c == 0x8f)
return 3;
if (c & 0x80)
return 2;
return 1;
}
STATIC_FUNCTION(int)
pg_euc_cn_mblen(const char *s)
{
unsigned char c = *s;
return ((c & 0x80) ? 2 : 1);
}
STATIC_FUNCTION(int)
pg_utf8_mblen(const char *s)
{
unsigned char c = *s;
if ((c & 0x80) == 0)
return 1;
if ((c & 0xe0) == 0xc0)
return 2;
if ((c & 0xf0) == 0xe0)
return 3;
if ((c & 0xf8) == 0xf0)
return 4;
return 1;
}
STATIC_FUNCTION(int)
pg_mule_mblen(const char *s)
{
unsigned char c = *s;
if (c >= 0x81 && c <= 0x8d)
return 2;
if (c == 0x9a || c == 0x9b)
return 3;
if (c >= 0x90 && c <= 0x99)
return 2;
if (c == 0x9c || c == 0x9d)
return 4;
return 1;
}
STATIC_FUNCTION(int)
pg_sjis_mblen(const char *s)
{
unsigned char c = *s;
if (c >= 0xa1 && c <= 0xdf)
return 1; /* 1 byte kana? */
if (c & 0x80)
return 2;
return 1;
}
STATIC_FUNCTION(int)
pg_big5_mblen(const char *s)
{
unsigned char c = *s;
return ((c & 0x80) ? 2 : 1);
}
STATIC_FUNCTION(int)
pg_gbk_mblen(const char *s)
{
unsigned char c = *s;
return ((c & 0x80) ? 2 : 1);
}
STATIC_FUNCTION(int)
pg_uhc_mblen(const char *s)
{
unsigned char c = *s;
return ((c & 0x80) ? 2 : 1);
}
STATIC_FUNCTION(int)
pg_gb18030_mblen(const char *s)
{
unsigned char c1 = *s;
unsigned char c2;
if ((c1 & 0x80) == 0)
return 1; /* ascii */
c2 = s[1];
if (c2 >= 0x30 && c2 <= 0x39)
return 4;
return 2;
}
#define DATABASE_SB_ENCODE(NAME) { #NAME, 1, pg_latin_mblen }
#define DATABASE_MB_ENCODE(NAME,MAXLEN,FN_MBLEN) { #NAME, MAXLEN, FN_MBLEN }
PUBLIC_DATA xpu_encode_info xpu_encode_catalog[] = {
DATABASE_SB_ENCODE(SQL_ASCII),
DATABASE_MB_ENCODE(EUC_JP, 3, pg_euc_mblen),
DATABASE_MB_ENCODE(EUC_CN, 2, pg_euc_cn_mblen),
DATABASE_MB_ENCODE(EUC_KR, 3, pg_euc_mblen),
DATABASE_MB_ENCODE(EUC_TW, 4, pg_euc_mblen),
DATABASE_MB_ENCODE(EUC_JIS_2004, 3, pg_euc_mblen),
DATABASE_MB_ENCODE(UTF8, 4, pg_utf8_mblen),
DATABASE_MB_ENCODE(MULE_INTERNAL, 4, pg_mule_mblen),
DATABASE_SB_ENCODE(LATIN1),
DATABASE_SB_ENCODE(LATIN2),
DATABASE_SB_ENCODE(LATIN3),
DATABASE_SB_ENCODE(LATIN4),
DATABASE_SB_ENCODE(LATIN5),
DATABASE_SB_ENCODE(LATIN6),
DATABASE_SB_ENCODE(LATIN7),
DATABASE_SB_ENCODE(LATIN8),
DATABASE_SB_ENCODE(LATIN9),
DATABASE_SB_ENCODE(LATIN10),
DATABASE_SB_ENCODE(WIN1256),
DATABASE_SB_ENCODE(WIN1258),
DATABASE_SB_ENCODE(WIN866),
DATABASE_SB_ENCODE(WIN874),
DATABASE_SB_ENCODE(KOI8R),
DATABASE_SB_ENCODE(WIN1251),
DATABASE_SB_ENCODE(WIN1252),
DATABASE_SB_ENCODE(ISO_8859_5),
DATABASE_SB_ENCODE(ISO_8859_6),
DATABASE_SB_ENCODE(ISO_8859_7),
DATABASE_SB_ENCODE(ISO_8859_8),
DATABASE_SB_ENCODE(WIN1250),
DATABASE_SB_ENCODE(WIN1253),
DATABASE_SB_ENCODE(WIN1254),
DATABASE_SB_ENCODE(WIN1255),
DATABASE_SB_ENCODE(WIN1257),
DATABASE_SB_ENCODE(KOI8U),
DATABASE_MB_ENCODE(SJIS, 2, pg_sjis_mblen),
DATABASE_MB_ENCODE(BIG5, 2, pg_big5_mblen),
DATABASE_MB_ENCODE(GBK, 2, pg_gbk_mblen),
DATABASE_MB_ENCODE(UHC, 2, pg_uhc_mblen),
DATABASE_MB_ENCODE(GB18030, 4, pg_gb18030_mblen),
DATABASE_MB_ENCODE(JOHAB, 3, pg_euc_mblen),
DATABASE_MB_ENCODE(SHIFT_JIS_2004, 2, pg_sjis_mblen),
{ "__LAST__", -1, NULL },
};
/* ----------------------------------------------------------------
*
* Routines to support LIKE and ILIKE
*
* ---------------------------------------------------------------- */
#define LIKE_TRUE 1
#define LIKE_FALSE 0
#define LIKE_ABORT (-1)
#define LIKE_EXCEPTION (-255)
#define NextByte(p, plen) \
do { (p)++; (plen)--; } while(0)
#define NextChar(p, plen) \
do { int __len = encode->enc_mblen(p); \
(p) += __len; (plen) -= __len; } while(0)
#define GetChar(c) (c)
#define GetCharUpper(c) (((c) >= 'a' && (c) <= 'z') ? c + ('A' - 'a') : c)
#define GENERIC_MATCH_TEXT_TEMPLATE(FUNCNAME, GETCHAR) \
STATIC_FUNCTION(int) \
FUNCNAME(kern_context *kcxt, \
const char *t, int tlen, \
const char *p, int plen, \
int depth) \
{ \
xpu_encode_info *encode = SESSION_ENCODE(kcxt->session); \
\
/* Fast path for match-everything pattern */ \
if (plen == 1 && *p == '%') \
return LIKE_TRUE; \
/* this function is recursive */ \
if (depth > 10) \
{ \
STROM_ELOG(kcxt, "like recursion too deep"); \
return LIKE_EXCEPTION; \
} \
/* \
* In this loop, we advance by char when matching wildcards \
* (and thus on recursive entry to this function we are \
* properly char-synced). On other occasions it is safe to \
* advance by byte,as the text and pattern will be in lockstep. \
* This allows us to perform all comparisons between the \
* text and pattern on a byte by byte basis, even for \
* multi-byte encodings. \
*/ \
while (tlen > 0 && plen > 0) \
{ \
if (*p == '\\') \
{ \
/* Next pattern byte must match literally, \
* whatever it is */ \
NextByte(p, plen); \
/* ... and there had better be one, per SQL standard */ \
if (plen <= 0) \
{ \
STROM_ELOG(kcxt, "invalid escape in LIKE pattern"); \
return LIKE_EXCEPTION; \
} \
if (GETCHAR(*p) != GETCHAR(*t)) \
return LIKE_FALSE; \
} \
else if (*p == '%') \
{ \
char firstpat; \
\
/* \
* % processing is essentially a search for a text \
* position at which the remainder of the text matches \
* the remainder of the pattern, using a recursive call \
* to check each potential match. \
* \
* If there are wildcards immediately following the %, \
* we can skip over them first, using the idea that any \
* sequence of N _'s and one or more %'s is equivalent \
* to N _'s and one % (ie, it will \
* match any sequence of at least N text characters). \
* In this way we will always run the recursive search \
* loop using a pattern fragment that begins with \
* a literal character-to-match, thereby not recursing \
* more than we have to. \
*/ \
NextByte(p, plen); \
\
while (plen > 0) \
{ \
if (*p == '%') \
NextByte(p, plen); \
else if (*p == '_') \
{ \
/* If not enough text left to match \
*the pattern, ABORT */ \
if (tlen <= 0) \
return LIKE_ABORT; \
NextChar(t, tlen); \
NextByte(p, plen); \
} \
else \
break; /* A non-wildcard pattern char */ \
} \
/* \
* If we're at end of pattern, match: we have \
* a trailing a trailing % which matches any remaining \
* text string. \
*/ \
if (plen <= 0) \