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openGauss-server/src/common/backend/utils/adt/varchar.cpp

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/* -------------------------------------------------------------------------
*
* varchar.c
* Functions for the built-in types char(n) and varchar(n).
*
* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/utils/adt/varchar.c
*
* -------------------------------------------------------------------------
*/
#include "postgres.h"
#include "knl/knl_variable.h"
#include "access/hash.h"
#include "access/tuptoaster.h"
#include "libpq/pqformat.h"
#include "nodes/nodeFuncs.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "mb/pg_wchar.h"
#include "utils/sortsupport.h"
#include "vecexecutor/vectorbatch.h"
#include "miscadmin.h"
#define NOT_NULL_ARG(n) \
do { \
if (PG_GETARG_POINTER(n) == NULL) { \
ereport(ERROR, \
(errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED), \
errmsg("null value not allowed"), \
errhint("%dth argument is NULL.", n + 1))); \
} \
} while (0)
/* common code for bpchartypmodin and varchartypmodin */
static int32 anychar_typmodin(ArrayType* ta, const char* typname)
{
int32 typmod;
int32* tl = NULL;
int n;
tl = ArrayGetIntegerTypmods(ta, &n);
/*
* we're not too tense about good error message here because grammar
* shouldn't allow wrong number of modifiers for CHAR
*/
if (n != 1)
ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("invalid type modifier")));
if (*tl < 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("length for type %s must be at least 1", typname)));
if (*tl > MaxAttrSize)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("length for type %s cannot exceed %d", typname, MaxAttrSize)));
/*
* For largely historical reasons, the typmod is VARHDRSZ plus the number
* of characters; there is enough client-side code that knows about that
* that we'd better not change it.
*/
typmod = VARHDRSZ + *tl;
return typmod;
}
/* common code for bpchartypmodout and varchartypmodout */
static char* anychar_typmodout(int32 typmod)
{
const size_t buffer_len = 64;
char* res = (char*)palloc(buffer_len);
errno_t ss_rc = 0;
if (typmod > VARHDRSZ) {
ss_rc = snprintf_s(res, buffer_len, buffer_len - 1, "(%d)", (int)(typmod - VARHDRSZ));
securec_check_ss(ss_rc, "\0", "\0");
} else {
*res = '\0';
}
return res;
}
/*
* CHAR() and VARCHAR() types are part of the SQL standard. CHAR()
* is for blank-padded string whose length is specified in CREATE TABLE.
* VARCHAR is for storing string whose length is at most the length specified
* at CREATE TABLE time.
*
* It's hard to implement these types because we cannot figure out
* the length of the type from the type itself. I changed (hopefully all) the
* fmgr calls that invoke input functions of a data type to supply the
* length also. (eg. in INSERTs, we have the tupleDescriptor which contains
* the length of the attributes and hence the exact length of the char() or
* varchar(). We pass this to bpcharin() or varcharin().) In the case where
* we cannot determine the length, we pass in -1 instead and the input
* converter does not enforce any length check.
*
* We actually implement this as a varlena so that we don't have to pass in
* the length for the comparison functions. (The difference between these
* types and "text" is that we truncate and possibly blank-pad the string
* at insertion time.)
*
* - ay 6/95
*/
/*
* bpchar_input -- common guts of bpcharin and bpcharrecv
*
* s is the input text of length len (may not be null-terminated)
* atttypmod is the typmod value to apply
*
* Note that atttypmod is measured in characters, which
* is not necessarily the same as the number of bytes.
*
* If the input string is too long, raise an error, unless the extra
* characters are spaces, in which case they're truncated. (per SQL)
*/
static BpChar* bpchar_input(const char* s, size_t len, int32 atttypmod)
{
BpChar* result = NULL;
char* r = NULL;
size_t max_len;
errno_t ss_rc = 0;
/* If typmod is -1 (or invalid), use the actual string length */
if (atttypmod < (int32)VARHDRSZ) {
max_len = len;
} else {
max_len = atttypmod - VARHDRSZ;
if (len > max_len) {
/* Verify that extra characters are spaces, and clip them off */
size_t mb_max_len = pg_mbcharcliplen(s, len, max_len);
size_t j;
/*
* at this point, len is the actual BYTE length of the input
* string, max_len is the max number of CHARACTERS allowed for this
* bpchar type, mb_max_len is the length in BYTES of those chars.
*/
for (j = mb_max_len; j < len; j++) {
if (s[j] != ' ')
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type character(%d)", (int)max_len)));
}
/*
* Now we set max_len to the necessary byte length, not the number
* of CHARACTERS!
*/
max_len = len = mb_max_len;
}
}
result = (BpChar*)palloc(max_len + VARHDRSZ);
SET_VARSIZE(result, max_len + VARHDRSZ);
r = VARDATA(result);
if (len > 0) {
ss_rc = memcpy_s(r, len, s, len);
securec_check(ss_rc, "\0", "\0");
}
/* blank pad the string if necessary */
if (max_len > len) {
ss_rc = memset_s(r + len, max_len - len, ' ', max_len - len);
securec_check(ss_rc, "\0", "\0");
}
return result;
}
/*
* Convert a C string to CHARACTER internal representation. atttypmod
* is the declared length of the type plus VARHDRSZ.
*/
Datum bpcharin(PG_FUNCTION_ARGS)
{
char* s = PG_GETARG_CSTRING(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
BpChar* result = NULL;
result = bpchar_input(s, strlen(s), atttypmod);
PG_RETURN_BPCHAR_P(result);
}
/*
* Convert a CHARACTER value to a C string.
*
* Uses the text conversion functions, which is only appropriate if BpChar
* and text are equivalent types.
*/
Datum bpcharout(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
PG_RETURN_CSTRING(TextDatumGetCString(txt));
}
/*
* bpcharrecv - converts external binary format to bpchar
*/
Datum bpcharrecv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
BpChar* result = NULL;
char* str = NULL;
int nbytes;
str = pq_getmsgtext(buf, buf->len - buf->cursor, &nbytes);
result = bpchar_input(str, nbytes, atttypmod);
pfree_ext(str);
PG_RETURN_BPCHAR_P(result);
}
/*
* bpcharsend - converts bpchar to binary format
*/
Datum bpcharsend(PG_FUNCTION_ARGS)
{
/* Exactly the same as textsend, so share code */
return textsend(fcinfo);
}
/*
* Converts a CHARACTER type to the specified size.
*
* maxlen is the typmod, ie, declared length plus VARHDRSZ bytes.
* isExplicit is true if this is for an explicit cast to char(N).
*
* Truncation rules: for an explicit cast, silently truncate to the given
* length; for an implicit cast, raise error unless extra characters are
* all spaces. (This is sort-of per SQL: the spec would actually have us
* raise a "completion condition" for the explicit cast case, but Postgres
* hasn't got such a concept.)
*/
Datum bpchar(PG_FUNCTION_ARGS)
{
BpChar* source = PG_GETARG_BPCHAR_PP(0);
int32 max_len = PG_GETARG_INT32(1);
bool is_explicit = PG_GETARG_BOOL(2);
BpChar* result = NULL;
int32 len;
char* r = NULL;
char* s = NULL;
int i;
errno_t ss_rc = 0;
/* No work if typmod is invalid */
if (max_len < (int32)VARHDRSZ)
PG_RETURN_BPCHAR_P(source);
max_len -= VARHDRSZ;
len = VARSIZE_ANY_EXHDR(source);
s = VARDATA_ANY(source);
/* No work if supplied data matches typmod already */
if (len == max_len)
PG_RETURN_BPCHAR_P(source);
if (len > max_len) {
/* Verify that extra characters are spaces, and clip them off */
size_t maxmblen;
maxmblen = pg_mbcharcliplen(s, len, max_len);
if (!is_explicit) {
for (i = maxmblen; i < len; i++)
if (s[i] != ' ') {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type character(%d)", max_len)));
}
}
len = maxmblen;
/*
* At this point, max_len is the necessary byte length, not the number
* of CHARACTERS!
*
* Now, only explicit cast char type data should pad blank space.
*/
if (!is_explicit)
max_len = len;
}
Assert(max_len >= len);
result = (BpChar*)palloc(max_len + VARHDRSZ);
SET_VARSIZE(result, max_len + VARHDRSZ);
r = VARDATA(result);
if (len > 0) {
ss_rc = memcpy_s(r, len, s, len);
securec_check(ss_rc, "\0", "\0");
}
/* blank pad the string if necessary */
if (max_len > len) {
ss_rc = memset_s(r + len, max_len - len, ' ', max_len - len);
securec_check(ss_rc, "\0", "\0");
}
PG_RETURN_BPCHAR_P(result);
}
/*
* Convert char to bpchar(1).
*/
Datum char_bpchar(PG_FUNCTION_ARGS)
{
char c = PG_GETARG_CHAR(0);
BpChar* result = NULL;
result = (BpChar*)palloc(VARHDRSZ + 1);
SET_VARSIZE(result, VARHDRSZ + 1);
*(VARDATA(result)) = c;
PG_RETURN_BPCHAR_P(result);
}
/*
* Converts a bpchar() type to a NameData type.
*/
Datum bpchar_name(PG_FUNCTION_ARGS)
{
BpChar* s = PG_GETARG_BPCHAR_PP(0);
char* s_data = NULL;
Name result;
int len;
errno_t ss_rc = 0;
len = VARSIZE_ANY_EXHDR(s);
s_data = VARDATA_ANY(s);
/* Truncate oversize input */
if (len >= NAMEDATALEN) {
len = pg_mbcliplen(s_data, len, NAMEDATALEN - 1);
}
/* Remove trailing blanks */
while (len > 0) {
if (s_data[len - 1] != ' ') {
break;
}
len--;
}
/* We use palloc0 here to ensure result is zero-padded */
result = (Name)palloc0(NAMEDATALEN);
if (len > 0) {
ss_rc = memcpy_s(NameStr(*result), len, s_data, len);
securec_check(ss_rc, "\0", "\0");
}
PG_RETURN_NAME(result);
}
/*
* Converts a NameData type to a bpchar type.
*
* Uses the text conversion functions, which is only appropriate if BpChar
* and text are equivalent types.
*/
Datum name_bpchar(PG_FUNCTION_ARGS)
{
Name s = PG_GETARG_NAME(0);
BpChar* result = NULL;
result = (BpChar*)cstring_to_text(NameStr(*s));
PG_RETURN_BPCHAR_P(result);
}
Datum bpchartypmodin(PG_FUNCTION_ARGS)
{
ArrayType* ta = PG_GETARG_ARRAYTYPE_P(0);
PG_RETURN_INT32(anychar_typmodin(ta, "char"));
}
Datum bpchartypmodout(PG_FUNCTION_ARGS)
{
int32 typmod = PG_GETARG_INT32(0);
PG_RETURN_CSTRING(anychar_typmodout(typmod));
}
/*
* varchar_input -- common guts of varcharin and varcharrecv
*
* s is the input text of length len (may not be null-terminated)
* atttypmod is the typmod value to apply
*
* Note that atttypmod is measured in characters, which
* is not necessarily the same as the number of bytes.
*
* If the input string is too long, raise an error, unless the extra
* characters are spaces, in which case they're truncated. (per SQL)
*
* Uses the C string to text conversion function, which is only appropriate
* if VarChar and text are equivalent types.
*/
static VarChar* varchar_input(const char* s, size_t len, int32 atttypmod)
{
VarChar* result = NULL;
size_t max_len;
max_len = atttypmod - VARHDRSZ;
if (atttypmod >= (int32)VARHDRSZ && len > max_len) {
/* Verify that extra characters are spaces, and clip them off */
size_t mbmaxlen = pg_mbcharcliplen(s, len, max_len);
size_t j;
for (j = mbmaxlen; j < len; j++) {
if (s[j] != ' ') {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type character varying(%d)", (int)max_len)));
}
}
len = mbmaxlen;
}
result = (VarChar*)cstring_to_text_with_len(s, len);
return result;
}
/*
* Convert a C string to VARCHAR internal representation. atttypmod
* is the declared length of the type plus VARHDRSZ.
*/
Datum varcharin(PG_FUNCTION_ARGS)
{
char* s = PG_GETARG_CSTRING(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
VarChar* result = NULL;
result = varchar_input(s, strlen(s), atttypmod);
PG_RETURN_VARCHAR_P(result);
}
/*
* Convert a VARCHAR value to a C string.
*
* Uses the text to C string conversion function, which is only appropriate
* if VarChar and text are equivalent types.
*/
Datum varcharout(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
PG_RETURN_CSTRING(TextDatumGetCString(txt));
}
/*
* varcharrecv - converts external binary format to varchar
*/
Datum varcharrecv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
VarChar* result = NULL;
char* str = NULL;
int nbytes;
str = pq_getmsgtext(buf, buf->len - buf->cursor, &nbytes);
result = varchar_input(str, nbytes, atttypmod);
pfree_ext(str);
PG_RETURN_VARCHAR_P(result);
}
/*
* varcharsend - converts varchar to binary format
*/
Datum varcharsend(PG_FUNCTION_ARGS)
{
/* Exactly the same as textsend, so share code */
return textsend(fcinfo);
}
/*
* Flatten calls to varchar's length coercion function that set the new maximum
* length >= the previous maximum length. We can ignore the isExplicit
* argument, since that only affects truncation cases.
*/
Datum varchar_transform(PG_FUNCTION_ARGS)
{
FuncExpr* expr = (FuncExpr*)PG_GETARG_POINTER(0);
Node* ret = NULL;
Node* typmod = NULL;
Assert(IsA(expr, FuncExpr));
Assert(list_length(expr->args) >= 2);
typmod = (Node*)lsecond(expr->args);
if (IsA(typmod, Const) && !((Const*)typmod)->constisnull) {
Node* source = (Node*)linitial(expr->args);
int32 old_typmod = exprTypmod(source);
int32 new_typmod = DatumGetInt32(((Const*)typmod)->constvalue);
int32 old_max = old_typmod - VARHDRSZ;
int32 new_max = new_typmod - VARHDRSZ;
if (new_typmod < 0 || (old_typmod >= 0 && old_max <= new_max)) {
ret = relabel_to_typmod(source, new_typmod);
}
}
PG_RETURN_POINTER(ret);
}
/*
* Converts a VARCHAR type to the specified size.
*
* maxlen is the typmod, ie, declared length plus VARHDRSZ bytes.
* isExplicit is true if this is for an explicit cast to varchar(N).
*
* Truncation rules: for an explicit cast, silently truncate to the given
* length; for an implicit cast, raise error unless extra characters are
* all spaces. (This is sort-of per SQL: the spec would actually have us
* raise a "completion condition" for the explicit cast case, but Postgres
* hasn't got such a concept.)
*/
Datum varchar(PG_FUNCTION_ARGS)
{
VarChar* source = PG_GETARG_VARCHAR_PP(0);
int32 typmod = PG_GETARG_INT32(1);
bool is_explicit = PG_GETARG_BOOL(2);
int32 len;
int32 max_len;
size_t max_mb_len;
int i;
char* s_data = NULL;
len = VARSIZE_ANY_EXHDR(source);
s_data = VARDATA_ANY(source);
max_len = typmod - VARHDRSZ;
/* No work if typmod is invalid or supplied data fits it already */
if (max_len < 0 || len <= max_len) {
PG_RETURN_VARCHAR_P(source);
}
/* only reach here if string is too long... */
if (len > MaxAttrSize) {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type character varying maxlen(%d) input_len(%d)", MaxAttrSize, len)));
}
/* truncate multibyte string preserving multibyte boundary */
max_mb_len = pg_mbcharcliplen(s_data, len, max_len);
if (!is_explicit) {
for (i = max_mb_len; i < len; i++) {
if (s_data[i] != ' ') {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type character varying(%d)", max_len)));
}
}
}
PG_RETURN_VARCHAR_P((VarChar*)cstring_to_text_with_len(s_data, max_mb_len));
}
Datum varchartypmodin(PG_FUNCTION_ARGS)
{
ArrayType* ta = PG_GETARG_ARRAYTYPE_P(0);
PG_RETURN_INT32(anychar_typmodin(ta, "varchar"));
}
Datum varchartypmodout(PG_FUNCTION_ARGS)
{
int32 typmod = PG_GETARG_INT32(0);
PG_RETURN_CSTRING(anychar_typmodout(typmod));
}
/* "True" length (not counting trailing blanks) of a BpChar */
int bcTruelen(BpChar* arg)
{
char* s = VARDATA_ANY(arg);
int i;
int len;
len = VARSIZE_ANY_EXHDR(arg);
for (i = len - 1; i >= 0; i--) {
if (s[i] != ' ') {
break;
}
}
return i + 1;
}
/*
* len stands for the length of char, we can use bpchartruelen
* to get the ture length of bpchar faster.
*/
int bpchartruelen(const char* s, int len)
{
int i;
/*
* Note that we rely on the assumption that ' ' is a singleton unit on
* every supported multibyte server encoding.
*/
for (i = len - 1; i >= 0; i--) {
if (s[i] != ' ') {
break;
}
}
return i + 1;
}
// return number of char in a char(n) type string.
// when calculating the length,we do not ignoring the trailing
// spaces, which is different with pg9.2
Datum bpcharlen(PG_FUNCTION_ARGS)
{
BpChar* arg = PG_GETARG_BPCHAR_PP(0);
int len;
/* get number of bytes, ignoring trailing spaces */
len = VARSIZE_ANY_EXHDR(arg);
/* in multibyte encoding, convert to number of characters */
if (pg_database_encoding_max_length() != 1) {
len = pg_mbstrlen_with_len(VARDATA_ANY(arg), len);
}
PG_RETURN_INT32(len);
}
// return number of byte in a char(n) type string.
// when calculating the length,we do not ignoring the trailing spaces.
Datum bpcharlenb(PG_FUNCTION_ARGS)
{
BpChar* arg = PG_GETARG_BPCHAR_PP(0);
int len;
/* get number of bytes, not ignoring trailing spaces */
len = VARSIZE_ANY_EXHDR(arg);
PG_RETURN_INT32(len);
}
Datum bpcharoctetlen(PG_FUNCTION_ARGS)
{
Datum arg = PG_GETARG_DATUM(0);
/* We need not detoast the input at all */
PG_RETURN_INT32(toast_raw_datum_size(arg) - VARHDRSZ);
}
/*****************************************************************************
* Comparison Functions used for bpchar
*
* Note: btree indexes need these routines not to leak memory; therefore,
* be careful to free working copies of toasted datums. Most places don't
* need to be so careful.
*****************************************************************************/
Datum bpchareq(PG_FUNCTION_ARGS)
{
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int len1;
int len2;
bool result = false;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
/*
* Since we only care about equality or not-equality, we can avoid all the
* expense of strcoll() here, and just do bitwise comparison.
*/
if (len1 != len2) {
result = false;
} else {
result = (memcmp(VARDATA_ANY(arg1), VARDATA_ANY(arg2), len1) == 0);
}
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result);
}
Datum bpcharne(PG_FUNCTION_ARGS)
{
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int len1, len2;
bool result = false;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
/*
* Since we only care about equality or not-equality, we can avoid all the
* expense of strcoll() here, and just do bitwise comparison.
*/
if (len1 != len2) {
result = true;
} else {
result = (memcmp(VARDATA_ANY(arg1), VARDATA_ANY(arg2), len1) != 0);
}
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result);
}
int bpcharcase(PG_FUNCTION_ARGS)
{
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int len1, len2;
int cmp;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
cmp = varstr_cmp(VARDATA_ANY(arg1), len1, VARDATA_ANY(arg2), len2, PG_GET_COLLATION());
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
return cmp;
}
Datum bpcharlt(PG_FUNCTION_ARGS)
{
int cmp = bpcharcase(fcinfo);
PG_RETURN_BOOL(cmp < 0);
}
Datum bpcharle(PG_FUNCTION_ARGS)
{
int cmp = bpcharcase(fcinfo);
PG_RETURN_BOOL(cmp <= 0);
}
Datum bpchargt(PG_FUNCTION_ARGS)
{
int cmp = bpcharcase(fcinfo);
PG_RETURN_BOOL(cmp > 0);
}
Datum bpcharge(PG_FUNCTION_ARGS)
{
int cmp = bpcharcase(fcinfo);
PG_RETURN_BOOL(cmp >= 0);
}
Datum bpcharcmp(PG_FUNCTION_ARGS)
{
int cmp = bpcharcase(fcinfo);
PG_RETURN_INT32(cmp);
}
Datum bpchar_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport)PG_GETARG_POINTER(0);
Oid collid = ssup->ssup_collation;
MemoryContext oldcontext;
oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);
/* Use generic string SortSupport */
varstr_sortsupport(ssup, collid, true);
(void)MemoryContextSwitchTo(oldcontext);
PG_RETURN_VOID();
}
Datum bpchar_larger(PG_FUNCTION_ARGS)
{
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int len1, len2;
int cmp;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
cmp = varstr_cmp(VARDATA_ANY(arg1), len1, VARDATA_ANY(arg2), len2, PG_GET_COLLATION());
PG_RETURN_BPCHAR_P((cmp >= 0) ? arg1 : arg2);
}
Datum bpchar_smaller(PG_FUNCTION_ARGS)
{
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int len1, len2;
int cmp;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
cmp = varstr_cmp(VARDATA_ANY(arg1), len1, VARDATA_ANY(arg2), len2, PG_GET_COLLATION());
PG_RETURN_BPCHAR_P((cmp <= 0) ? arg1 : arg2);
}
/* Cast int4 -> bpchar */
Datum int4_bpchar(PG_FUNCTION_ARGS)
{
int32 arg1 = PG_GETARG_INT32(0);
BpChar* result = NULL;
char* s = (char*)palloc(12); /* sign, 10 digits, '\0' */
pg_ltoa(arg1, s);
result = bpchar_input(s, strlen(s), -1);
PG_RETURN_BPCHAR_P(result);
}
/*
* @Description: int1 convert to bpchar.
* @in arg1 - tinyint type numeric.
* @return bpchar type string.
*/
Datum int1_bpchar(PG_FUNCTION_ARGS)
{
uint8 arg1 = PG_GETARG_UINT8(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int1out, arg1));
result = DirectFunctionCall3(bpcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* @Description: int2 convert to bpchar.
* @in arg1 - smallint type numeric.
* @return bpchar type string.
*/
Datum int2_bpchar(PG_FUNCTION_ARGS)
{
int16 arg1 = PG_GETARG_INT16(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int2out, arg1));
result = DirectFunctionCall3(bpcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* @Description: float4 convert to bpchar.
* @in arg1 - float4 type numeric.
* @return - bpchar type string.
*/
Datum float4_bpchar(PG_FUNCTION_ARGS)
{
float4 arg1 = PG_GETARG_FLOAT4(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(float4out, Float4GetDatum(arg1)));
result = DirectFunctionCall3(bpcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* @Description: float8 convert to bpchar.
* @in arg1 - float8 type numeric.
* @return - bpchar type string.
*/
Datum float8_bpchar(PG_FUNCTION_ARGS)
{
float8 arg1 = PG_GETARG_FLOAT8(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(float8out, Float8GetDatum(arg1)));
result = DirectFunctionCall3(bpcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* bpchar needs a specialized hash function because we want to ignore
* trailing blanks in comparisons.
*
* Note: currently there is no need for locale-specific behavior here,
* but if we ever change the semantics of bpchar comparison to trust
* strcoll() completely, we'd need to do something different in non-C locales.
*/
Datum hashbpchar(PG_FUNCTION_ARGS)
{
BpChar* key = PG_GETARG_BPCHAR_PP(0);
char* key_data = NULL;
int key_len;
Datum result;
key_data = VARDATA_ANY(key);
key_len = bcTruelen(key);
result = hash_any((unsigned char*)key_data, key_len);
/* Avoid leaking memory for toasted inputs */
PG_FREE_IF_COPY(key, 0);
return result;
}
/*
* The following operators support character-by-character comparison
* of bpchar datums, to allow building indexes suitable for LIKE clauses.
* Note that the regular bpchareq/bpcharne comparison operators are assumed
* to be compatible with these!
*/
static int internal_bpchar_pattern_compare(BpChar* arg1, BpChar* arg2)
{
int result;
int len1;
int len2;
len1 = bcTruelen(arg1);
len2 = bcTruelen(arg2);
result = memcmp(VARDATA_ANY(arg1), VARDATA_ANY(arg2), Min(len1, len2));
if (result != 0) {
return result;
} else if (len1 < len2) {
return -1;
} else if (len1 > len2) {
return 1;
} else {
return 0;
}
}
Datum bpchar_pattern_lt(PG_FUNCTION_ARGS)
{
NOT_NULL_ARG(0);
NOT_NULL_ARG(1);
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int result;
result = internal_bpchar_pattern_compare(arg1, arg2);
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result < 0);
}
Datum bpchar_pattern_le(PG_FUNCTION_ARGS)
{
NOT_NULL_ARG(0);
NOT_NULL_ARG(1);
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int result;
result = internal_bpchar_pattern_compare(arg1, arg2);
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result <= 0);
}
Datum bpchar_pattern_ge(PG_FUNCTION_ARGS)
{
NOT_NULL_ARG(0);
NOT_NULL_ARG(1);
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int result;
result = internal_bpchar_pattern_compare(arg1, arg2);
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result >= 0);
}
Datum bpchar_pattern_gt(PG_FUNCTION_ARGS)
{
NOT_NULL_ARG(0);
NOT_NULL_ARG(1);
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int result;
result = internal_bpchar_pattern_compare(arg1, arg2);
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_BOOL(result > 0);
}
Datum btbpchar_pattern_cmp(PG_FUNCTION_ARGS)
{
NOT_NULL_ARG(0);
NOT_NULL_ARG(1);
BpChar* arg1 = PG_GETARG_BPCHAR_PP(0);
BpChar* arg2 = PG_GETARG_BPCHAR_PP(1);
int result;
result = internal_bpchar_pattern_compare(arg1, arg2);
PG_FREE_IF_COPY(arg1, 0);
PG_FREE_IF_COPY(arg2, 1);
PG_RETURN_INT32(result);
}
/* add for nvarchar2 data type */
static NVarChar2* nvarchar2_input(const char* s, size_t len, int32 atttypmod)
{
NVarChar2* result = NULL;
size_t max_len;
max_len = atttypmod - VARHDRSZ;
if (atttypmod >= (int32)VARHDRSZ && len > max_len) {
/* Verify that extra characters are spaces, and clip them off */
size_t mb_max_len = pg_mbcharcliplen_orig(s, len, max_len);
size_t j;
for (j = mb_max_len; j < len; j++) {
if (s[j] != ' ') {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type nvarchar2(%d)", (int)max_len)));
}
}
len = mb_max_len;
}
result = (NVarChar2*)cstring_to_text_with_len(s, len);
return result;
}
/*
* Convert a C string to VARCHAR internal representation. atttypmod
* is the declared length of the type plus VARHDRSZ.
*/
Datum nvarchar2in(PG_FUNCTION_ARGS)
{
char* s = PG_GETARG_CSTRING(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
NVarChar2* result = NULL;
result = nvarchar2_input(s, strlen(s), atttypmod);
PG_RETURN_NVARCHAR2_P(result);
}
/*
* Convert a VARCHAR value to a C string.
*
* Uses the text to C string conversion function, which is only appropriate
* if VarChar and text are equivalent types.
*/
Datum nvarchar2out(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
PG_RETURN_CSTRING(TextDatumGetCString(txt));
}
/*
* varcharrecv - converts external binary format to varchar
*/
Datum nvarchar2recv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo)PG_GETARG_POINTER(0);
#ifdef NOT_USED
Oid typelem = PG_GETARG_OID(1);
#endif
int32 atttypmod = PG_GETARG_INT32(2);
NVarChar2* result = NULL;
char* str = NULL;
int nbytes;
str = pq_getmsgtext(buf, buf->len - buf->cursor, &nbytes);
result = nvarchar2_input(str, nbytes, atttypmod);
pfree_ext(str);
PG_RETURN_NVARCHAR2_P(result);
}
/*
* varcharsend - converts varchar to binary format
*/
Datum nvarchar2send(PG_FUNCTION_ARGS)
{
/* Exactly the same as textsend, so share code */
return textsend(fcinfo);
}
/*
* Converts a VARCHAR type to the specified size.
*
* maxlen is the typmod, ie, declared length plus VARHDRSZ bytes.
* isExplicit is true if this is for an explicit cast to varchar(N).
*
* Truncation rules: for an explicit cast, silently truncate to the given
* length; for an implicit cast, raise error unless extra characters are
* all spaces. (This is sort-of per SQL: the spec would actually have us
* raise a "completion condition" for the explicit cast case, but Postgres
* hasn't got such a concept.)
*/
Datum nvarchar2(PG_FUNCTION_ARGS)
{
NVarChar2* source = PG_GETARG_NVARCHAR2_PP(0);
int32 typmod = PG_GETARG_INT32(1);
bool is_explicit = PG_GETARG_BOOL(2);
int32 len;
int32 max_len;
size_t max_mb_len;
int i;
char* s_data = NULL;
len = VARSIZE_ANY_EXHDR(source);
s_data = VARDATA_ANY(source);
max_len = typmod - VARHDRSZ;
/* No work if typmod is invalid or supplied data fits it already */
if (max_len < 0 || len <= max_len) {
PG_RETURN_NVARCHAR2_P(source);
}
/* truncate multibyte string preserving multibyte boundary */
max_mb_len = pg_mbcharcliplen_orig(s_data, len, max_len);
if (!is_explicit) {
for (i = max_mb_len; i < len; i++)
if (s_data[i] != ' ') {
ereport(ERROR,
(errcode(ERRCODE_STRING_DATA_RIGHT_TRUNCATION),
errmsg("value too long for type nvarchar2(%d)", max_len)));
}
}
PG_RETURN_NVARCHAR2_P((NVarChar2*)cstring_to_text_with_len(s_data, max_mb_len));
}
Datum nvarchar2typmodin(PG_FUNCTION_ARGS)
{
ArrayType* ta = PG_GETARG_ARRAYTYPE_P(0);
PG_RETURN_INT32(anychar_typmodin(ta, "nvarchar2"));
}
Datum nvarchar2typmodout(PG_FUNCTION_ARGS)
{
int32 typmod = PG_GETARG_INT32(0);
PG_RETURN_CSTRING(anychar_typmodout(typmod));
}
/*
* Convert all C string to VARCHAR internal representation. atttypmod
* is the declared length of the type plus VARHDRSZ.
* vectorize function
*/
static FORCE_INLINE bool datumlike(Datum datum1, Datum datum2)
{
Size size1 = VARSIZE_ANY_EXHDR(datum1);
Size size2 = VARSIZE_ANY_EXHDR(datum2);
return GenericMatchText(VARDATA_ANY(datum1), size1, VARDATA_ANY(datum2), size2) == LIKE_TRUE;
}
ScalarVector* vtextlike(PG_FUNCTION_ARGS)
{
ScalarVector* vec_parg1 = PG_GETARG_VECTOR(0);
ScalarVector* vec_parg2 = PG_GETARG_VECTOR(1);
int32 nvalues = PG_GETARG_INT32(2);
ScalarVector* vec_result = PG_GETARG_VECTOR(3);
bool* pselection = PG_GETARG_SELECTION(4);
ScalarValue* presult = vec_result->m_vals;
ScalarValue* parg1 = vec_parg1->m_vals;
ScalarValue* parg2 = vec_parg2->m_vals;
uint8* flag1 = vec_parg1->m_flag;
uint8* flag2 = vec_parg2->m_flag;
uint8* result_flag = vec_result->m_flag;
Datum arg1;
Datum arg2;
int i;
bool result = false;
if (pselection != NULL) {
for (i = 0; i < nvalues; i++) {
if (pselection[i]) {
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i])) {
SET_NULL(result_flag[i]);
} else {
arg1 = ScalarVector::Decode(parg1[i]);
arg2 = ScalarVector::Decode(parg2[i]);
result = datumlike(arg1, arg2);
presult[i] = result;
SET_NOTNULL(result_flag[i]);
}
}
}
} else {
for (i = 0; i < nvalues; i++) {
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i])) {
SET_NULL(result_flag[i]);
} else {
arg1 = ScalarVector::Decode(parg1[i]);
arg2 = ScalarVector::Decode(parg2[i]);
result = datumlike(arg1, arg2);
presult[i] = result;
SET_NOTNULL(result_flag[i]);
}
}
}
vec_result->m_rows = nvalues;
return vec_result;
}
ScalarVector* vtextnlike(PG_FUNCTION_ARGS)
{
ScalarVector* vec_parg1 = PG_GETARG_VECTOR(0);
ScalarVector* vec_arg2 = PG_GETARG_VECTOR(1);
int32 nvalues = PG_GETARG_INT32(2);
ScalarVector* vec_result = PG_GETARG_VECTOR(3);
bool* pselection = PG_GETARG_SELECTION(4);
ScalarValue* parg1 = vec_parg1->m_vals;
ScalarValue* parg2 = vec_arg2->m_vals;
uint8* flag1 = vec_parg1->m_flag;
uint8* flag2 = vec_arg2->m_flag;
uint8* result_flag = vec_result->m_flag;
ScalarValue* presult = vec_result->m_vals;
Datum arg1;
Datum arg2;
int i;
bool result = false;
if (pselection != NULL) {
for (i = 0; i < nvalues; i++) {
if (pselection[i]) {
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i])) {
SET_NULL(result_flag[i]);
} else {
arg1 = ScalarVector::Decode(parg1[i]);
arg2 = ScalarVector::Decode(parg2[i]);
result = !datumlike(arg1, arg2);
presult[i] = result;
SET_NOTNULL(result_flag[i]);
}
}
}
} else {
for (i = 0; i < nvalues; i++) {
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i])) {
SET_NULL(result_flag[i]);
} else {
arg1 = ScalarVector::Decode(parg1[i]);
arg2 = ScalarVector::Decode(parg2[i]);
result = !datumlike(arg1, arg2);
presult[i] = result;
SET_NOTNULL(result_flag[i]);
}
}
}
vec_result->m_rows = nvalues;
return vec_result;
}
/*
* vlower vectorize function
*
* Purpose:
* Returns string, with all letters forced to lowercase.
*
*/
ScalarVector* vlower(PG_FUNCTION_ARGS)
{
ScalarVector* vec_parg1 = PG_GETARG_VECTOR(0);
int32 nvalues = PG_GETARG_INT32(1);
ScalarVector* vec_result = PG_GETARG_VECTOR(2);
bool* pselection = PG_GETARG_SELECTION(3);
ScalarValue* parg1 = vec_parg1->m_vals;
uint8* flag = vec_parg1->m_flag;
uint8* result_flag = vec_result->m_flag;
Oid collation = PG_GET_COLLATION();
Datum value;
int i;
if (pselection != NULL) {
for (i = 0; i < nvalues; i++) {
if (pselection[i]) {
if (IS_NULL(flag[i])) {
SET_NULL(result_flag[i]);
} else {
value = ScalarVector::Decode(parg1[i]);
vec_result->m_vals[i] = DirectFunctionCall1Coll(lower, collation, value);
SET_NOTNULL(result_flag[i]);
}
}
}
} else {
for (i = 0; i < nvalues; i++) {
if (IS_NULL(flag[i])) {
SET_NULL(result_flag[i]);
} else {
value = ScalarVector::Decode(parg1[i]);
vec_result->m_vals[i] = DirectFunctionCall1Coll(lower, collation, value);
SET_NOTNULL(result_flag[i]);
}
}
}
vec_result->m_rows = nvalues;
return vec_result;
}
/********************************************************************
*
* vupper
*
* Purpose:
*
* Returns string, with all letters forced to uppercase.
*
*********************************************************************
*/
ScalarVector* vupper(PG_FUNCTION_ARGS)
{
ScalarVector* vec_parg1 = PG_GETARG_VECTOR(0);
int32 nvalues = PG_GETARG_INT32(1);
ScalarVector* vec_result = PG_GETARG_VECTOR(2);
bool* pselection = PG_GETARG_SELECTION(3);
ScalarValue* parg1 = vec_parg1->m_vals;
uint8* flag = vec_parg1->m_flag;
uint8* result_flag = vec_result->m_flag;
Oid collation = PG_GET_COLLATION();
Datum value;
int i;
if (pselection != NULL) {
for (i = 0; i < nvalues; i++) {
if (pselection[i]) {
if (IS_NULL(flag[i])) {
SET_NULL(result_flag[i]);
} else {
value = ScalarVector::Decode(parg1[i]);
vec_result->m_vals[i] = DirectFunctionCall1Coll(upper, collation, value);
SET_NOTNULL(result_flag[i]);
}
}
}
} else {
for (i = 0; i < nvalues; i++) {
if (IS_NULL(flag[i])) {
SET_NULL(result_flag[i]);
} else {
value = ScalarVector::Decode(parg1[i]);
vec_result->m_vals[i] = DirectFunctionCall1Coll(upper, collation, value);
SET_NOTNULL(result_flag[i]);
}
}
}
vec_result->m_rows = nvalues;
return vec_result;
}
/*
* The internal realization of function vlpad.
*/
static void vlpad_internal(ScalarVector* parg1, ScalarVector* parg2, ScalarVector* vec_ret, uint8* pflags_res, int len,
int eml, int idx, mblen_converter fun_mblen)
{
int s1_len;
int s2_len;
int byte_len;
int m;
char* ptr1 = NULL;
char* ptr2 = NULL;
char* ptr2_start = NULL;
char* ptr2_end = NULL;
char* ptr_ret = NULL;
text* ret = NULL;
errno_t rc = EOK;
s1_len = VARSIZE_ANY_EXHDR(parg1->m_vals[idx]) > 0 ? VARSIZE_ANY_EXHDR(parg1->m_vals[idx]) : 0;
s2_len = VARSIZE_ANY_EXHDR(parg2->m_vals[idx]) > 0 ? VARSIZE_ANY_EXHDR(parg2->m_vals[idx]) : 0;
s1_len = pg_mbstrlen_with_len_eml(VARDATA_ANY(parg1->m_vals[idx]), s1_len, eml);
s1_len = s1_len > len ? len : s1_len;
len = s2_len <= 0 ? s1_len : len;
byte_len = eml * len;
if (len != 0 && byte_len / eml != len) {
ereport(ERROR, (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), errmsg("requested length too large")));
}
ret = (text*)palloc((VARHDRSZ + byte_len));
m = len - s1_len;
ptr2 = ptr2_start = VARDATA_ANY(parg2->m_vals[idx]);
ptr2_end = ptr2 + s2_len;
ptr_ret = VARDATA(ret);
while (m--) {
int mlen = fun_mblen((const unsigned char*)ptr2);
rc = memcpy_s(ptr_ret, mlen, ptr2, mlen);
securec_check(rc, "\0", "\0");
ptr_ret += mlen;
ptr2 += mlen;
if (ptr2 == ptr2_end) {
ptr2 = ptr2_start;
}
}
ptr1 = VARDATA_ANY(parg1->m_vals[idx]);
while (s1_len--) {
int mlen = fun_mblen((const unsigned char*)ptr1);
rc = memcpy_s(ptr_ret, mlen, ptr1, mlen);
securec_check(rc, "\0", "\0");
ptr_ret += mlen;
ptr1 += mlen;
}
SET_VARSIZE(ret, ptr_ret - (char*)ret);
if (VARSIZE_ANY_EXHDR(ret) == 0 && DB_IS_CMPT(DB_CMPT_A) && !RETURN_NS) {
SET_NULL(pflags_res[idx]);
} else {
vec_ret->m_vals[idx] = PointerGetDatum(ret);
SET_NOTNULL(pflags_res[idx]);
}
}
/********************************************************************
*
* vlpad
*
* Syntax:
*
* text lpad(text string1, int4 len, text string2)
*
* Purpose:
*
* Returns string1, left-padded to length len with the sequence of
* characters in string2. If len is less than the length of string1,
* instead truncate (on the right) to len.
*
********************************************************************/
ScalarVector* vlpad(PG_FUNCTION_ARGS)
{
ScalarVector* parg1 = PG_GETARG_VECTOR(0);
uint8* flag1 = parg1->m_flag;
ScalarVector* parg2 = PG_GETARG_VECTOR(1);
uint8* flag2 = parg2->m_flag;
ScalarVector* parg3 = PG_GETARG_VECTOR(2);
uint8* flag3 = parg3->m_flag;
int32 nvalues = PG_GETARG_INT32(3);
ScalarVector* vec_ret = PG_GETARG_VECTOR(4);
uint8* pflags_res = (uint8*)(vec_ret->m_flag);
bool* pselection = PG_GETARG_SELECTION(5);
int eml;
int len;
int i;
/*
* The encoding method is defined after database is setted.
*/
eml = pg_database_encoding_max_length();
mblen_converter fun_mblen;
fun_mblen = *pg_wchar_table[GetDatabaseEncoding()].mblen;
if (pselection != NULL) {
for (i = 0; i < nvalues; i++) {
// if this line not selected, skip it
if (!pselection[i]) {
continue;
}
/*
* if one of the string,length,fill value in i'th row
* is null, set pflags_res[i] to NULL, continue
*/
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i]) || IS_NULL(flag3[i])) {
SET_NULL(pflags_res[i]);
} else {
/*
* Get the length value of lpad function,
* negative len is silently taken as zero
*/
len = DatumGetInt32(parg2->m_vals[i]);
len = len < 0 ? 0 : len;
vlpad_internal(parg1, parg3, vec_ret, pflags_res, len, eml, i, fun_mblen);
}
}
} else {
for (i = 0; i < nvalues; i++) {
/*
* if one of the string,length,fill value in i'th row
* is null, set pflags_res[i] to NULL, continue
*/
if (IS_NULL(flag1[i]) || IS_NULL(flag2[i]) || IS_NULL(flag3[i])) {
SET_NULL(pflags_res[i]);
} else {
/*
* Get the length value of lpad function,
* negative len is silently taken as zero
*/
len = DatumGetInt32(parg2->m_vals[i]);
len = len < 0 ? 0 : len;
vlpad_internal(parg1, parg3, vec_ret, pflags_res, len, eml, i, fun_mblen);
}
}
}
PG_GETARG_VECTOR(4)->m_rows = nvalues;
return PG_GETARG_VECTOR(4);
}
Datum varchar_int4(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(varcharout, txt));
result = DirectFunctionCall1(int4in, CStringGetDatum(tmp));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum bpchar_int4(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(bpcharout, txt));
result = DirectFunctionCall1(int4in, CStringGetDatum(tmp));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum timestamp_varchar(PG_FUNCTION_ARGS)
{
Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(timestamp_out, timestamp));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* @Description: int1 convert to varchar
* @in arg1 - tinyint type numeric.
* @return bpchar type string.
*/
Datum int1_varchar(PG_FUNCTION_ARGS)
{
uint8 arg1 = PG_GETARG_UINT8(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int1out, arg1));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum int2_varchar(PG_FUNCTION_ARGS)
{
int16 arg1 = PG_GETARG_INT16(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int2out, arg1));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum int4_varchar(PG_FUNCTION_ARGS)
{
int32 arg1 = PG_GETARG_INT32(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int4out, arg1));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum float4_varchar(PG_FUNCTION_ARGS)
{
float4 num = PG_GETARG_FLOAT4(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(float4out, Float4GetDatum(num)));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum float8_varchar(PG_FUNCTION_ARGS)
{
float8 num = PG_GETARG_FLOAT8(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(float8out, Float8GetDatum(num)));
result = DirectFunctionCall3(varcharin, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum varchar_timestamp(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(varcharout, txt));
result = DirectFunctionCall3(timestamp_in, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* @Description: int1 convert to nvarchar2
* @in arg1 - tinyint type numeric.
* @return nvarchar2 type string.
*/
Datum int1_nvarchar2(PG_FUNCTION_ARGS)
{
uint8 arg1 = PG_GETARG_UINT8(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(int1out, arg1));
result = DirectFunctionCall3(nvarchar2in, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
Datum bpchar_timestamp(PG_FUNCTION_ARGS)
{
Datum txt = PG_GETARG_DATUM(0);
char* tmp = NULL;
Datum result;
tmp = DatumGetCString(DirectFunctionCall1(bpcharout, txt));
result = DirectFunctionCall3(timestamp_in, CStringGetDatum(tmp), ObjectIdGetDatum(0), Int32GetDatum(-1));
pfree_ext(tmp);
PG_RETURN_DATUM(result);
}
/*
* vector_bpcharlen
*
* Has the same function as bpcharlen
*/
ScalarVector* vbpcharlen(PG_FUNCTION_ARGS)
{
ScalarVector* varg = PG_GETARG_VECTOR(0);
uint8* vflag = varg->m_flag;
int32 nvalues = PG_GETARG_INT32(1);
ScalarVector* vresult = PG_GETARG_VECTOR(2);
uint8* pflag_res = vresult->m_flag;
bool* pselection = PG_GETARG_SELECTION(3);
int k;
int len;
int eml;
eml = pg_database_encoding_max_length();
if (pselection != NULL) {
for (k = 0; k < nvalues; k++) {
if (pselection[k]) {
if (NOT_NULL(vflag[k])) {
len = VARSIZE_ANY_EXHDR(varg->m_vals[k]);
if (eml != 1)
len = pg_mbstrlen_with_len_eml(VARDATA_ANY(varg->m_vals[k]), len, eml);
vresult->m_vals[k] = Int32GetDatum(len);
SET_NOTNULL(pflag_res[k]);
} else {
SET_NULL(pflag_res[k]);
}
}
}
} else {
for (k = 0; k < nvalues; k++) {
if (NOT_NULL(vflag[k])) {
len = VARSIZE_ANY_EXHDR(varg->m_vals[k]);
if (eml != 1)
len = pg_mbstrlen_with_len_eml(VARDATA_ANY(varg->m_vals[k]), len, eml);
vresult->m_vals[k] = Int32GetDatum(len);
SET_NOTNULL(pflag_res[k]);
} else {
SET_NULL(pflag_res[k]);
}
}
}
vresult->m_rows = nvalues;
return vresult;
}
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