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postgresql/src/interfaces/ecpg/ecpglib/execute.c

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/* src/interfaces/ecpg/ecpglib/execute.c */
/*
* The aim is to get a simpler interface to the database routines.
* All the tedious messing around with tuples is supposed to be hidden
* by this function.
*/
/* Author: Linus Tolke
(actually most if the code is "borrowed" from the distribution and just
slightly modified)
*/
/* Taken over as part of PostgreSQL by Michael Meskes <meskes@postgresql.org>
on Feb. 5th, 1998 */
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
#include <math.h>
#include "catalog/pg_type_d.h"
#include "ecpgerrno.h"
#include "ecpglib.h"
#include "ecpglib_extern.h"
#include "ecpgtype.h"
#include "pgtypes_date.h"
#include "pgtypes_interval.h"
#include "pgtypes_numeric.h"
#include "pgtypes_timestamp.h"
#include "sql3types.h"
#include "sqlca.h"
#include "sqlda-compat.h"
#include "sqlda-native.h"
/*
* This function returns a newly malloced string that has ' and \
* escaped.
*/
static char *
quote_postgres(char *arg, bool quote, int lineno)
{
char *res;
size_t length;
size_t escaped_len;
size_t buffer_len;
/*
* if quote is false we just need to store things in a descriptor they
* will be quoted once they are inserted in a statement
*/
if (!quote)
return arg;
else
{
length = strlen(arg);
buffer_len = 2 * length + 1;
res = (char *) ecpg_alloc(buffer_len + 3, lineno);
if (!res)
return res;
escaped_len = PQescapeString(res + 1, arg, buffer_len);
if (length == escaped_len)
{
res[0] = res[escaped_len + 1] = '\'';
res[escaped_len + 2] = '\0';
}
else
{
/*
* We don't know if the target database is using
* standard_conforming_strings, so we always use E'' strings.
*/
memmove(res + 2, res + 1, escaped_len);
res[0] = ESCAPE_STRING_SYNTAX;
res[1] = res[escaped_len + 2] = '\'';
res[escaped_len + 3] = '\0';
}
ecpg_free(arg);
return res;
}
}
static void
free_variable(struct variable *var)
{
struct variable *var_next;
while (var)
{
var_next = var->next;
ecpg_free(var);
var = var_next;
}
}
static void
free_statement(struct statement *stmt)
{
if (stmt == NULL)
return;
free_variable(stmt->inlist);
free_variable(stmt->outlist);
ecpg_free(stmt->command);
ecpg_free(stmt->name);
#ifdef HAVE_USELOCALE
if (stmt->clocale)
freelocale(stmt->clocale);
#else
ecpg_free(stmt->oldlocale);
#endif
ecpg_free(stmt);
}
static int
next_insert(char *text, int pos, bool questionmarks, bool std_strings)
{
bool string = false;
int p = pos;
for (; text[p] != '\0'; p++)
{
if (string && !std_strings && text[p] == '\\') /* escape character */
p++;
else if (text[p] == '\'')
string = string ? false : true;
else if (!string)
{
if (text[p] == '$' && isdigit((unsigned char) text[p + 1]))
{
/* this can be either a dollar quote or a variable */
int i;
for (i = p + 1; isdigit((unsigned char) text[i]); i++)
/* empty loop body */ ;
if (!isalpha((unsigned char) text[i]) &&
isascii((unsigned char) text[i]) &&text[i] != '_')
/* not dollar delimited quote */
return p;
}
else if (questionmarks && text[p] == '?')
{
/* also allow old style placeholders */
return p;
}
}
}
return -1;
}
static bool
ecpg_type_infocache_push(struct ECPGtype_information_cache **cache, int oid, enum ARRAY_TYPE isarray, int lineno)
{
struct ECPGtype_information_cache *new_entry
= (struct ECPGtype_information_cache *) ecpg_alloc(sizeof(struct ECPGtype_information_cache), lineno);
if (new_entry == NULL)
return false;
new_entry->oid = oid;
new_entry->isarray = isarray;
new_entry->next = *cache;
*cache = new_entry;
return true;
}
static enum ARRAY_TYPE
ecpg_is_type_an_array(int type, const struct statement *stmt, const struct variable *var)
{
char *array_query;
enum ARRAY_TYPE isarray = ECPG_ARRAY_NOT_SET;
PGresult *query;
struct ECPGtype_information_cache *cache_entry;
if ((stmt->connection->cache_head) == NULL)
{
/*
* Text like types are not an array for ecpg, but postgres counts them
* as an array. This define reminds you to not 'correct' these values.
*/
#define not_an_array_in_ecpg ECPG_ARRAY_NONE
/* populate cache with well known types to speed things up */
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BOOLOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BYTEAOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CHAROID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), NAMEOID, not_an_array_in_ecpg, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT8OID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT2OID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT2VECTOROID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT4OID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), REGPROCOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TEXTOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), OIDOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIDOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), XIDOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIDOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), OIDVECTOROID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), POINTOID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), LSEGOID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), PATHOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BOXOID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), POLYGONOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), LINEOID, ECPG_ARRAY_VECTOR, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), FLOAT4OID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), FLOAT8OID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), UNKNOWNOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIRCLEOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CASHOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INETOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIDROID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BPCHAROID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), VARCHAROID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), DATEOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMEOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMESTAMPOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMESTAMPTZOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INTERVALOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMETZOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BITOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), VARBITOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), NUMERICOID, ECPG_ARRAY_NONE, stmt->lineno))
return ECPG_ARRAY_ERROR;
}
for (cache_entry = (stmt->connection->cache_head); cache_entry != NULL; cache_entry = cache_entry->next)
{
if (cache_entry->oid == type)
return cache_entry->isarray;
}
array_query = (char *) ecpg_alloc(strlen("select typlen from pg_type where oid= and typelem<>0") + 11, stmt->lineno);
if (array_query == NULL)
return ECPG_ARRAY_ERROR;
sprintf(array_query, "select typlen from pg_type where oid=%d and typelem<>0", type);
query = PQexec(stmt->connection->connection, array_query);
ecpg_free(array_query);
if (!ecpg_check_PQresult(query, stmt->lineno, stmt->connection->connection, stmt->compat))
return ECPG_ARRAY_ERROR;
else if (PQresultStatus(query) == PGRES_TUPLES_OK)
{
if (PQntuples(query) == 0)
isarray = ECPG_ARRAY_NONE;
else
{
isarray = (atol((char *) PQgetvalue(query, 0, 0)) == -1) ? ECPG_ARRAY_ARRAY : ECPG_ARRAY_VECTOR;
if (ecpg_dynamic_type(type) == SQL3_CHARACTER ||
ecpg_dynamic_type(type) == SQL3_CHARACTER_VARYING)
{
/*
* arrays of character strings are not yet implemented
*/
isarray = ECPG_ARRAY_NONE;
}
}
PQclear(query);
}
else
return ECPG_ARRAY_ERROR;
ecpg_type_infocache_push(&(stmt->connection->cache_head), type, isarray, stmt->lineno);
ecpg_log("ecpg_is_type_an_array on line %d: type (%d); C (%d); array (%s)\n", stmt->lineno, type, var->type, ECPG_IS_ARRAY(isarray) ? "yes" : "no");
return isarray;
}
bool
ecpg_store_result(const PGresult *results, int act_field,
const struct statement *stmt, struct variable *var)
{
enum ARRAY_TYPE isarray;
int act_tuple,
ntuples = PQntuples(results);
bool status = true;
if ((isarray = ecpg_is_type_an_array(PQftype(results, act_field), stmt, var)) == ECPG_ARRAY_ERROR)
{
ecpg_raise(stmt->lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
if (isarray == ECPG_ARRAY_NONE)
{
/*
* if we don't have enough space, we cannot read all tuples
*/
if ((var->arrsize > 0 && ntuples > var->arrsize) || (var->ind_arrsize > 0 && ntuples > var->ind_arrsize))
{
ecpg_log("ecpg_store_result on line %d: incorrect number of matches; %d don't fit into array of %ld\n",
stmt->lineno, ntuples, var->arrsize);
ecpg_raise(stmt->lineno, INFORMIX_MODE(stmt->compat) ? ECPG_INFORMIX_SUBSELECT_NOT_ONE : ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
return false;
}
}
else
{
/*
* since we read an array, the variable has to be an array too
*/
if (var->arrsize == 0)
{
ecpg_raise(stmt->lineno, ECPG_NO_ARRAY, ECPG_SQLSTATE_DATATYPE_MISMATCH, NULL);
return false;
}
}
/*
* allocate memory for NULL pointers
*/
if ((var->arrsize == 0 || var->varcharsize == 0) && var->value == NULL)
{
int len = 0;
if (!PQfformat(results, act_field))
{
switch (var->type)
{
case ECPGt_char:
case ECPGt_unsigned_char:
case ECPGt_string:
if (!var->varcharsize && !var->arrsize)
{
/* special mode for handling char**foo=0 */
for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
len += strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
len *= var->offset; /* should be 1, but YMNK */
len += (ntuples + 1) * sizeof(char *);
}
else
{
var->varcharsize = 0;
/* check strlen for each tuple */
for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
{
int len = strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
if (len > var->varcharsize)
var->varcharsize = len;
}
var->offset *= var->varcharsize;
len = var->offset * ntuples;
}
break;
case ECPGt_varchar:
len = ntuples * (var->varcharsize + sizeof(int));
break;
default:
len = var->offset * ntuples;
break;
}
}
else
{
for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
len += PQgetlength(results, act_tuple, act_field);
}
ecpg_log("ecpg_store_result on line %d: allocating memory for %d tuples\n", stmt->lineno, ntuples);
var->value = (char *) ecpg_auto_alloc(len, stmt->lineno);
if (!var->value)
return false;
*((char **) var->pointer) = var->value;
}
/* allocate indicator variable if needed */
if ((var->ind_arrsize == 0 || var->ind_varcharsize == 0) && var->ind_value == NULL && var->ind_pointer != NULL)
{
int len = var->ind_offset * ntuples;
var->ind_value = (char *) ecpg_auto_alloc(len, stmt->lineno);
if (!var->ind_value)
return false;
*((char **) var->ind_pointer) = var->ind_value;
}
/* fill the variable with the tuple(s) */
if (!var->varcharsize && !var->arrsize &&
(var->type == ECPGt_char || var->type == ECPGt_unsigned_char || var->type == ECPGt_string))
{
/* special mode for handling char**foo=0 */
/* filling the array of (char*)s */
char **current_string = (char **) var->value;
/* storing the data (after the last array element) */
char *current_data_location = (char *) &current_string[ntuples + 1];
for (act_tuple = 0; act_tuple < ntuples && status; act_tuple++)
{
int len = strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
if (!ecpg_get_data(results, act_tuple, act_field, stmt->lineno,
var->type, var->ind_type, current_data_location,
var->ind_value, len, 0, var->ind_offset, isarray, stmt->compat, stmt->force_indicator))
status = false;
else
{
*current_string = current_data_location;
current_data_location += len;
current_string++;
}
}
/* terminate the list */
*current_string = NULL;
}
else
{
for (act_tuple = 0; act_tuple < ntuples && status; act_tuple++)
{
if (!ecpg_get_data(results, act_tuple, act_field, stmt->lineno,
var->type, var->ind_type, var->value,
var->ind_value, var->varcharsize, var->offset, var->ind_offset, isarray, stmt->compat, stmt->force_indicator))
status = false;
}
}
return status;
}
static void
sprintf_double_value(char *ptr, double value, const char *delim)
{
if (isnan(value))
sprintf(ptr, "%s%s", "NaN", delim);
else if (isinf(value))
{
if (value < 0)
sprintf(ptr, "%s%s", "-Infinity", delim);
else
sprintf(ptr, "%s%s", "Infinity", delim);
}
else
sprintf(ptr, "%.15g%s", value, delim);
}
static void
sprintf_float_value(char *ptr, float value, const char *delim)
{
if (isnan(value))
sprintf(ptr, "%s%s", "NaN", delim);
else if (isinf(value))
{
if (value < 0)
sprintf(ptr, "%s%s", "-Infinity", delim);
else
sprintf(ptr, "%s%s", "Infinity", delim);
}
else
sprintf(ptr, "%.15g%s", value, delim);
}
static char *
convert_bytea_to_string(char *from_data, int from_len, int lineno)
{
char *to_data;
int to_len = ecpg_hex_enc_len(from_len) + 4 + 1; /* backslash + 'x' +
* quote + quote */
to_data = ecpg_alloc(to_len, lineno);
if (!to_data)
return NULL;
strcpy(to_data, "'\\x");
ecpg_hex_encode(from_data, from_len, to_data + 3);
strcpy(to_data + 3 + ecpg_hex_enc_len(from_len), "\'");
return to_data;
}
bool
ecpg_store_input(const int lineno, const bool force_indicator, const struct variable *var,
char **tobeinserted_p, bool quote)
{
char *mallocedval = NULL;
char *newcopy = NULL;
/*
* arrays are not possible unless the column is an array, too FIXME: we do
* not know if the column is an array here array input to singleton column
* will result in a runtime error
*/
/*
* Some special treatment is needed for records since we want their
* contents to arrive in a comma-separated list on insert (I think).
*/
*tobeinserted_p = "";
/* check for null value and set input buffer accordingly */
switch (var->ind_type)
{
case ECPGt_short:
case ECPGt_unsigned_short:
if (*(short *) var->ind_value < 0)
*tobeinserted_p = NULL;
break;
case ECPGt_int:
case ECPGt_unsigned_int:
if (*(int *) var->ind_value < 0)
*tobeinserted_p = NULL;
break;
case ECPGt_long:
case ECPGt_unsigned_long:
if (*(long *) var->ind_value < 0L)
*tobeinserted_p = NULL;
break;
#ifdef HAVE_LONG_LONG_INT
case ECPGt_long_long:
case ECPGt_unsigned_long_long:
if (*(long long int *) var->ind_value < (long long) 0)
*tobeinserted_p = NULL;
break;
#endif /* HAVE_LONG_LONG_INT */
case ECPGt_NO_INDICATOR:
if (force_indicator == false)
{
if (ECPGis_noind_null(var->type, var->value))
*tobeinserted_p = NULL;
}
break;
default:
break;
}
if (*tobeinserted_p != NULL)
{
int asize = var->arrsize ? var->arrsize : 1;
switch (var->type)
{
int element;
case ECPGt_short:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%hd,", ((short *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%hd", *((short *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_int:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%d,", ((int *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%d", *((int *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_unsigned_short:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%hu,", ((unsigned short *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%hu", *((unsigned short *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_unsigned_int:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%u,", ((unsigned int *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%u", *((unsigned int *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_long:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%ld,", ((long *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%ld", *((long *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_unsigned_long:
if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%lu,", ((unsigned long *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%lu", *((unsigned long *) var->value));
*tobeinserted_p = mallocedval;
break;
#ifdef HAVE_LONG_LONG_INT
case ECPGt_long_long:
if (!(mallocedval = ecpg_alloc(asize * 30, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%lld,", ((long long int *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%lld", *((long long int *) var->value));
*tobeinserted_p = mallocedval;
break;
case ECPGt_unsigned_long_long:
if (!(mallocedval = ecpg_alloc(asize * 30, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%llu,", ((unsigned long long int *) var->value)[element]);
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf(mallocedval, "%llu", *((unsigned long long int *) var->value));
*tobeinserted_p = mallocedval;
break;
#endif /* HAVE_LONG_LONG_INT */
case ECPGt_float:
if (!(mallocedval = ecpg_alloc(asize * 25, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf_float_value(mallocedval + strlen(mallocedval), ((float *) var->value)[element], ",");
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf_float_value(mallocedval, *((float *) var->value), "");
*tobeinserted_p = mallocedval;
break;
case ECPGt_double:
if (!(mallocedval = ecpg_alloc(asize * 25, lineno)))
return false;
if (asize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf_double_value(mallocedval + strlen(mallocedval), ((double *) var->value)[element], ",");
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
sprintf_double_value(mallocedval, *((double *) var->value), "");
*tobeinserted_p = mallocedval;
break;
case ECPGt_bool:
if (!(mallocedval = ecpg_alloc(var->arrsize + sizeof("{}"), lineno)))
return false;
if (var->arrsize > 1)
{
strcpy(mallocedval, "{");
for (element = 0; element < asize; element++)
sprintf(mallocedval + strlen(mallocedval), "%c,", (((bool *) var->value)[element]) ? 't' : 'f');
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
}
else
{
if (var->offset == sizeof(char))
sprintf(mallocedval, "%c", (*((char *) var->value)) ? 't' : 'f');
else if (var->offset == sizeof(int))
sprintf(mallocedval, "%c", (*((int *) var->value)) ? 't' : 'f');
else
ecpg_raise(lineno, ECPG_CONVERT_BOOL, ECPG_SQLSTATE_DATATYPE_MISMATCH, NULL);
}
*tobeinserted_p = mallocedval;
break;
case ECPGt_char:
case ECPGt_unsigned_char:
case ECPGt_string:
{
/* set slen to string length if type is char * */
int slen = (var->varcharsize == 0) ? strlen((char *) var->value) : (unsigned int) var->varcharsize;
if (!(newcopy = ecpg_alloc(slen + 1, lineno)))
return false;
strncpy(newcopy, (char *) var->value, slen);
newcopy[slen] = '\0';
mallocedval = quote_postgres(newcopy, quote, lineno);
if (!mallocedval)
{
ecpg_free(newcopy);
return false;
}
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_const:
case ECPGt_char_variable:
{
int slen = strlen((char *) var->value);
if (!(mallocedval = ecpg_alloc(slen + 1, lineno)))
return false;
strncpy(mallocedval, (char *) var->value, slen);
mallocedval[slen] = '\0';
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_bytea:
{
struct ECPGgeneric_varchar *variable =
(struct ECPGgeneric_varchar *) (var->value);
if (!(mallocedval = (char *) ecpg_alloc(variable->len, lineno)))
return false;
memcpy(mallocedval, variable->arr, variable->len);
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_varchar:
{
struct ECPGgeneric_varchar *variable =
(struct ECPGgeneric_varchar *) (var->value);
if (!(newcopy = (char *) ecpg_alloc(variable->len + 1, lineno)))
return false;
strncpy(newcopy, variable->arr, variable->len);
newcopy[variable->len] = '\0';
mallocedval = quote_postgres(newcopy, quote, lineno);
if (!mallocedval)
{
ecpg_free(newcopy);
return false;
}
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_decimal:
case ECPGt_numeric:
{
char *str = NULL;
int slen;
numeric *nval;
if (var->arrsize > 1)
mallocedval = ecpg_strdup("{", lineno);
else
mallocedval = ecpg_strdup("", lineno);
if (!mallocedval)
return false;
for (element = 0; element < asize; element++)
{
int result;
nval = PGTYPESnumeric_new();
if (!nval)
{
ecpg_free(mallocedval);
return false;
}
if (var->type == ECPGt_numeric)
result = PGTYPESnumeric_copy(&(((numeric *) (var->value))[element]), nval);
else
result = PGTYPESnumeric_from_decimal(&(((decimal *) (var->value))[element]), nval);
if (result != 0)
{
PGTYPESnumeric_free(nval);
ecpg_free(mallocedval);
return false;
}
str = PGTYPESnumeric_to_asc(nval, nval->dscale);
slen = strlen(str);
PGTYPESnumeric_free(nval);
if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
{
ecpg_free(mallocedval);
ecpg_free(str);
return false;
}
mallocedval = newcopy;
/* also copy trailing '\0' */
memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval), ",");
ecpg_free(str);
}
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_interval:
{
char *str = NULL;
int slen;
if (var->arrsize > 1)
mallocedval = ecpg_strdup("{", lineno);
else
mallocedval = ecpg_strdup("", lineno);
if (!mallocedval)
return false;
for (element = 0; element < asize; element++)
{
str = quote_postgres(PGTYPESinterval_to_asc(&(((interval *) (var->value))[element])), quote, lineno);
if (!str)
{
ecpg_free(mallocedval);
return false;
}
slen = strlen(str);
if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
{
ecpg_free(mallocedval);
ecpg_free(str);
return false;
}
mallocedval = newcopy;
/* also copy trailing '\0' */
memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval), ",");
ecpg_free(str);
}
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_date:
{
char *str = NULL;
int slen;
if (var->arrsize > 1)
mallocedval = ecpg_strdup("{", lineno);
else
mallocedval = ecpg_strdup("", lineno);
if (!mallocedval)
return false;
for (element = 0; element < asize; element++)
{
str = quote_postgres(PGTYPESdate_to_asc(((date *) (var->value))[element]), quote, lineno);
if (!str)
{
ecpg_free(mallocedval);
return false;
}
slen = strlen(str);
if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
{
ecpg_free(mallocedval);
ecpg_free(str);
return false;
}
mallocedval = newcopy;
/* also copy trailing '\0' */
memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval), ",");
ecpg_free(str);
}
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_timestamp:
{
char *str = NULL;
int slen;
if (var->arrsize > 1)
mallocedval = ecpg_strdup("{", lineno);
else
mallocedval = ecpg_strdup("", lineno);
if (!mallocedval)
return false;
for (element = 0; element < asize; element++)
{
str = quote_postgres(PGTYPEStimestamp_to_asc(((timestamp *) (var->value))[element]), quote, lineno);
if (!str)
{
ecpg_free(mallocedval);
return false;
}
slen = strlen(str);
if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
{
ecpg_free(mallocedval);
ecpg_free(str);
return false;
}
mallocedval = newcopy;
/* also copy trailing '\0' */
memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval), ",");
ecpg_free(str);
}
if (var->arrsize > 1)
strcpy(mallocedval + strlen(mallocedval) - 1, "}");
*tobeinserted_p = mallocedval;
}
break;
case ECPGt_descriptor:
case ECPGt_sqlda:
break;
default:
/* Not implemented yet */
ecpg_raise(lineno, ECPG_UNSUPPORTED, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, ecpg_type_name(var->type));
return false;
break;
}
}
return true;
}
static void
print_param_value(char *value, int len, int is_binary, int lineno, int nth)
{
char *value_s;
bool malloced = false;
if (value == NULL)
value_s = "null";
else if (!is_binary)
value_s = value;
else
{
value_s = ecpg_alloc(ecpg_hex_enc_len(len) + 1, lineno);
if (value_s != NULL)
{
ecpg_hex_encode(value, len, value_s);
value_s[ecpg_hex_enc_len(len)] = '\0';
malloced = true;
}
else
value_s = "no memory for logging of parameter";
}
ecpg_log("ecpg_free_params on line %d: parameter %d = %s\n",
lineno, nth, value_s);
if (malloced)
ecpg_free(value_s);
}
void
ecpg_free_params(struct statement *stmt, bool print)
{
int n;
for (n = 0; n < stmt->nparams; n++)
{
if (print)
print_param_value(stmt->paramvalues[n], stmt->paramlengths[n],
stmt->paramformats[n], stmt->lineno, n + 1);
ecpg_free(stmt->paramvalues[n]);
}
ecpg_free(stmt->paramvalues);
ecpg_free(stmt->paramlengths);
ecpg_free(stmt->paramformats);
stmt->paramvalues = NULL;
stmt->paramlengths = NULL;
stmt->paramformats = NULL;
stmt->nparams = 0;
}
static bool
insert_tobeinserted(int position, int ph_len, struct statement *stmt, char *tobeinserted)
{
char *newcopy;
if (!(newcopy = (char *) ecpg_alloc(strlen(stmt->command)
+ strlen(tobeinserted)
+ 1, stmt->lineno)))
{
ecpg_free(tobeinserted);
return false;
}
strcpy(newcopy, stmt->command);
strcpy(newcopy + position - 1, tobeinserted);
/*
* The strange thing in the second argument is the rest of the string from
* the old string
*/
strcat(newcopy,
stmt->command
+ position
+ ph_len - 1);
ecpg_free(stmt->command);
stmt->command = newcopy;
ecpg_free(tobeinserted);
return true;
}
static bool
store_input_from_desc(struct statement *stmt, struct descriptor_item *desc_item,
char **tobeinserted)
{
struct variable var;
/*
* In case of binary data, only allocate memory and memcpy because binary
* data have been already stored into desc_item->data with
* ecpg_store_input() at ECPGset_desc().
*/
if (desc_item->is_binary)
{
if (!(*tobeinserted = ecpg_alloc(desc_item->data_len, stmt->lineno)))
return false;
memcpy(*tobeinserted, desc_item->data, desc_item->data_len);
return true;
}
var.type = ECPGt_char;
var.varcharsize = strlen(desc_item->data);
var.value = desc_item->data;
var.pointer = &(desc_item->data);
var.arrsize = 1;
var.offset = 0;
if (!desc_item->indicator)
{
var.ind_type = ECPGt_NO_INDICATOR;
var.ind_value = var.ind_pointer = NULL;
var.ind_varcharsize = var.ind_arrsize = var.ind_offset = 0;
}
else
{
var.ind_type = ECPGt_int;
var.ind_value = &(desc_item->indicator);
var.ind_pointer = &(var.ind_value);
var.ind_varcharsize = var.ind_arrsize = 1;
var.ind_offset = 0;
}
if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &var, tobeinserted, false))
return false;
return true;
}
/*
* ecpg_build_params
* Build statement parameters
*
* The input values are taken from user variables, and the results are stored
* in arrays which can be used by PQexecParams().
*/
bool
ecpg_build_params(struct statement *stmt)
{
struct variable *var;
int desc_counter = 0;
int position = 0;
const char *value;
bool std_strings = false;
/* Get standard_conforming_strings setting. */
value = PQparameterStatus(stmt->connection->connection, "standard_conforming_strings");
if (value && strcmp(value, "on") == 0)
std_strings = true;
/*
* If the type is one of the fill in types then we take the argument and
* enter it to our parameter array at the first position. Then if there
* are any more fill in types we add more parameters.
*/
var = stmt->inlist;
while (var)
{
char *tobeinserted;
int counter = 1;
bool binary_format;
int binary_length;
tobeinserted = NULL;
binary_length = 0;
binary_format = false;
/*
* A descriptor is a special case since it contains many variables but
* is listed only once.
*/
if (var->type == ECPGt_descriptor)
{
/*
* We create an additional variable list here, so the same logic
* applies.
*/
struct descriptor *desc;
struct descriptor_item *desc_item;
desc = ecpg_find_desc(stmt->lineno, var->pointer);
if (desc == NULL)
return false;
desc_counter++;
for (desc_item = desc->items; desc_item; desc_item = desc_item->next)
{
if (desc_item->num != desc_counter)
continue;
if (!store_input_from_desc(stmt, desc_item, &tobeinserted))
return false;
if (desc_item->is_binary)
{
binary_length = desc_item->data_len;
binary_format = true;
}
break;
}
if (desc->count == desc_counter)
desc_counter = 0;
}
else if (var->type == ECPGt_sqlda)
{
if (INFORMIX_MODE(stmt->compat))
{
struct sqlda_compat *sqlda = *(struct sqlda_compat **) var->pointer;
struct variable desc_inlist;
int i;
if (sqlda == NULL)
return false;
desc_counter++;
for (i = 0; i < sqlda->sqld; i++)
{
if (i + 1 == desc_counter)
{
desc_inlist.type = sqlda->sqlvar[i].sqltype;
desc_inlist.value = sqlda->sqlvar[i].sqldata;
desc_inlist.pointer = &(sqlda->sqlvar[i].sqldata);
switch (desc_inlist.type)
{
case ECPGt_char:
case ECPGt_varchar:
desc_inlist.varcharsize = strlen(sqlda->sqlvar[i].sqldata);
break;
default:
desc_inlist.varcharsize = 0;
break;
}
desc_inlist.arrsize = 1;
desc_inlist.offset = 0;
if (sqlda->sqlvar[i].sqlind)
{
desc_inlist.ind_type = ECPGt_short;
/* ECPG expects indicator value < 0 */
if (*(sqlda->sqlvar[i].sqlind))
*(sqlda->sqlvar[i].sqlind) = -1;
desc_inlist.ind_value = sqlda->sqlvar[i].sqlind;
desc_inlist.ind_pointer = &(sqlda->sqlvar[i].sqlind);
desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = 1;
desc_inlist.ind_offset = 0;
}
else
{
desc_inlist.ind_type = ECPGt_NO_INDICATOR;
desc_inlist.ind_value = desc_inlist.ind_pointer = NULL;
desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = desc_inlist.ind_offset = 0;
}
if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &desc_inlist, &tobeinserted, false))
return false;
break;
}
}
if (sqlda->sqld == desc_counter)
desc_counter = 0;
}
else
{
struct sqlda_struct *sqlda = *(struct sqlda_struct **) var->pointer;
struct variable desc_inlist;
int i;
if (sqlda == NULL)
return false;
desc_counter++;
for (i = 0; i < sqlda->sqln; i++)
{
if (i + 1 == desc_counter)
{
desc_inlist.type = sqlda->sqlvar[i].sqltype;
desc_inlist.value = sqlda->sqlvar[i].sqldata;
desc_inlist.pointer = &(sqlda->sqlvar[i].sqldata);
switch (desc_inlist.type)
{
case ECPGt_char:
case ECPGt_varchar:
desc_inlist.varcharsize = strlen(sqlda->sqlvar[i].sqldata);
break;
default:
desc_inlist.varcharsize = 0;
break;
}
desc_inlist.arrsize = 1;
desc_inlist.offset = 0;
if (sqlda->sqlvar[i].sqlind)
{
desc_inlist.ind_type = ECPGt_short;
/* ECPG expects indicator value < 0 */
if (*(sqlda->sqlvar[i].sqlind))
*(sqlda->sqlvar[i].sqlind) = -1;
desc_inlist.ind_value = sqlda->sqlvar[i].sqlind;
desc_inlist.ind_pointer = &(sqlda->sqlvar[i].sqlind);
desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = 1;
desc_inlist.ind_offset = 0;
}
else
{
desc_inlist.ind_type = ECPGt_NO_INDICATOR;
desc_inlist.ind_value = desc_inlist.ind_pointer = NULL;
desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = desc_inlist.ind_offset = 0;
}
if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &desc_inlist, &tobeinserted, false))
return false;
break;
}
}
if (sqlda->sqln == desc_counter)
desc_counter = 0;
}
}
else
{
if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, var, &tobeinserted, false))
return false;
if (var->type == ECPGt_bytea)
{
binary_length = ((struct ECPGgeneric_varchar *) (var->value))->len;
binary_format = true;
}
}
/*
* now tobeinserted points to an area that contains the next
* parameter; now find the position in the string where it belongs
*/
if ((position = next_insert(stmt->command, position, stmt->questionmarks, std_strings) + 1) == 0)
{
/*
* We have an argument but we don't have the matched up
* placeholder in the string
*/
ecpg_raise(stmt->lineno, ECPG_TOO_MANY_ARGUMENTS,
ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_PARAMETERS,
NULL);
ecpg_free_params(stmt, false);
ecpg_free(tobeinserted);
return false;
}
/*
* if var->type=ECPGt_char_variable we have a dynamic cursor we have
* to simulate a dynamic cursor because there is no backend
* functionality for it
*/
if (var->type == ECPGt_char_variable)
{
int ph_len = (stmt->command[position] == '?') ? strlen("?") : strlen("$1");
if (!insert_tobeinserted(position, ph_len, stmt, tobeinserted))
{
ecpg_free_params(stmt, false);
return false;
}
tobeinserted = NULL;
}
/*
* if the placeholder is '$0' we have to replace it on the client side
* this is for places we want to support variables at that are not
* supported in the backend
*/
else if (stmt->command[position] == '0')
{
if (stmt->statement_type == ECPGst_prepare ||
stmt->statement_type == ECPGst_exec_with_exprlist)
{
/* Need to double-quote the inserted statement name. */
char *str = ecpg_alloc(strlen(tobeinserted) + 2 + 1,
stmt->lineno);
if (!str)
{
ecpg_free(tobeinserted);
ecpg_free_params(stmt, false);
return false;
}
sprintf(str, "\"%s\"", tobeinserted);
ecpg_free(tobeinserted);
tobeinserted = str;
}
if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
{
ecpg_free_params(stmt, false);
return false;
}
tobeinserted = NULL;
}
else if (stmt->statement_type == ECPGst_exec_with_exprlist)
{
if (binary_format)
{
char *p = convert_bytea_to_string(tobeinserted,
binary_length,
stmt->lineno);
ecpg_free(tobeinserted);
if (!p)
{
ecpg_free_params(stmt, false);
return false;
}
tobeinserted = p;
}
if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
{
ecpg_free_params(stmt, false);
return false;
}
tobeinserted = NULL;
}
else
{
if (!(stmt->paramvalues = (char **) ecpg_realloc(stmt->paramvalues, sizeof(char *) * (stmt->nparams + 1), stmt->lineno)))
{
ecpg_free_params(stmt, false);
ecpg_free(tobeinserted);
return false;
}
stmt->paramvalues[stmt->nparams] = tobeinserted;
if (!(stmt->paramlengths = (int *) ecpg_realloc(stmt->paramlengths, sizeof(int) * (stmt->nparams + 1), stmt->lineno)))
{
ecpg_free_params(stmt, false);
return false;
}
stmt->paramlengths[stmt->nparams] = binary_length;
if (!(stmt->paramformats = (int *) ecpg_realloc(stmt->paramformats, sizeof(int) * (stmt->nparams + 1), stmt->lineno)))
{
ecpg_free_params(stmt, false);
return false;
}
stmt->paramformats[stmt->nparams] = (binary_format ? 1 : 0);
stmt->nparams++;
/* let's see if this was an old style placeholder */
if (stmt->command[position] == '?')
{
/* yes, replace with new style */
int buffersize = sizeof(int) * CHAR_BIT * 10 / 3; /* a rough guess of the
* size we need */
if (!(tobeinserted = (char *) ecpg_alloc(buffersize, stmt->lineno)))
{
ecpg_free_params(stmt, false);
return false;
}
snprintf(tobeinserted, buffersize, "$%d", counter++);
if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
{
ecpg_free_params(stmt, false);
return false;
}
tobeinserted = NULL;
}
}
if (desc_counter == 0)
var = var->next;
}
/*
* Check if there are unmatched things left. PREPARE AS has no parameter.
* Check other statement.
*/
if (stmt->statement_type != ECPGst_prepare &&
next_insert(stmt->command, position, stmt->questionmarks, std_strings) >= 0)
{
ecpg_raise(stmt->lineno, ECPG_TOO_FEW_ARGUMENTS,
ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_PARAMETERS, NULL);
ecpg_free_params(stmt, false);
return false;
}
return true;
}
/*
* ecpg_autostart_transaction
* If we are in non-autocommit mode, automatically start a transaction.
*/
bool
ecpg_autostart_transaction(struct statement *stmt)
{
if (PQtransactionStatus(stmt->connection->connection) == PQTRANS_IDLE && !stmt->connection->autocommit)
{
stmt->results = PQexec(stmt->connection->connection, "begin transaction");
if (!ecpg_check_PQresult(stmt->results, stmt->lineno, stmt->connection->connection, stmt->compat))
{
ecpg_free_params(stmt, false);
return false;
}
PQclear(stmt->results);
stmt->results = NULL;
}
return true;
}
/*
* ecpg_execute
* Execute the SQL statement.
*/
bool
ecpg_execute(struct statement *stmt)
{
ecpg_log("ecpg_execute on line %d: query: %s; with %d parameter(s) on connection %s\n", stmt->lineno, stmt->command, stmt->nparams, stmt->connection->name);
if (stmt->statement_type == ECPGst_execute)
{
stmt->results = PQexecPrepared(stmt->connection->connection,
stmt->name,
stmt->nparams,
(const char *const *) stmt->paramvalues,
(const int *) stmt->paramlengths,
(const int *) stmt->paramformats,
0);
ecpg_log("ecpg_execute on line %d: using PQexecPrepared for \"%s\"\n", stmt->lineno, stmt->command);
}
else
{
if (stmt->nparams == 0)
{
stmt->results = PQexec(stmt->connection->connection, stmt->command);
ecpg_log("ecpg_execute on line %d: using PQexec\n", stmt->lineno);
}
else
{
stmt->results = PQexecParams(stmt->connection->connection,
stmt->command, stmt->nparams, NULL,
(const char *const *) stmt->paramvalues,
(const int *) stmt->paramlengths,
(const int *) stmt->paramformats,
0);
ecpg_log("ecpg_execute on line %d: using PQexecParams\n", stmt->lineno);
}
if (stmt->statement_type == ECPGst_prepare)
{
if (!ecpg_register_prepared_stmt(stmt))
{
ecpg_free_params(stmt, true);
return false;
}
}
}
ecpg_free_params(stmt, true);
if (!ecpg_check_PQresult(stmt->results, stmt->lineno, stmt->connection->connection, stmt->compat))
return false;
return true;
}
/*-------
* ecpg_process_output
*
* Process the statement result and store it into application variables. This
* function can be called repeatedly during the same statement in case cursor
* readahead is used and the application does FETCH N which overflows the
* readahead window.
*
* Parameters
* stmt statement structure holding the PGresult and
* the list of output variables
* clear_result
* PQclear() the result upon returning from this function
*
* Returns success as boolean. Also an SQL error is raised in case of failure.
*-------
*/
bool
ecpg_process_output(struct statement *stmt, bool clear_result)
{
struct variable *var;
bool status = false;
char *cmdstat;
PGnotify *notify;
struct sqlca_t *sqlca = ECPGget_sqlca();
int nfields,
ntuples,
act_field;
if (sqlca == NULL)
{
ecpg_raise(stmt->lineno, ECPG_OUT_OF_MEMORY,
ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
var = stmt->outlist;
switch (PQresultStatus(stmt->results))
{
case PGRES_TUPLES_OK:
nfields = PQnfields(stmt->results);
sqlca->sqlerrd[2] = ntuples = PQntuples(stmt->results);
ecpg_log("ecpg_process_output on line %d: correctly got %d tuples with %d fields\n", stmt->lineno, ntuples, nfields);
status = true;
if (ntuples < 1)
{
if (ntuples)
ecpg_log("ecpg_process_output on line %d: incorrect number of matches (%d)\n",
stmt->lineno, ntuples);
ecpg_raise(stmt->lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL);
status = false;
break;
}
if (var != NULL && var->type == ECPGt_descriptor)
{
struct descriptor *desc = ecpg_find_desc(stmt->lineno, var->pointer);
if (desc == NULL)
status = false;
else
{
if (desc->result)
PQclear(desc->result);
desc->result = stmt->results;
clear_result = false;
ecpg_log("ecpg_process_output on line %d: putting result (%d tuples) into descriptor %s\n",
stmt->lineno, PQntuples(stmt->results), (const char *) var->pointer);
}
var = var->next;
}
else if (var != NULL && var->type == ECPGt_sqlda)
{
if (INFORMIX_MODE(stmt->compat))
{
struct sqlda_compat **_sqlda = (struct sqlda_compat **) var->pointer;
struct sqlda_compat *sqlda = *_sqlda;
struct sqlda_compat *sqlda_new;
int i;
/*
* If we are passed in a previously existing sqlda (chain)
* then free it.
*/
while (sqlda)
{
sqlda_new = sqlda->desc_next;
free(sqlda);
sqlda = sqlda_new;
}
*_sqlda = sqlda = sqlda_new = NULL;
for (i = ntuples - 1; i >= 0; i--)
{
/*
* Build a new sqlda structure. Note that only
* fetching 1 record is supported
*/
sqlda_new = ecpg_build_compat_sqlda(stmt->lineno, stmt->results, i, stmt->compat);
if (!sqlda_new)
{
/* cleanup all SQLDAs we created up */
while (sqlda)
{
sqlda_new = sqlda->desc_next;
free(sqlda);
sqlda = sqlda_new;
}
*_sqlda = NULL;
ecpg_log("ecpg_process_output on line %d: out of memory allocating a new sqlda\n", stmt->lineno);
status = false;
break;
}
else
{
ecpg_log("ecpg_process_output on line %d: new sqlda was built\n", stmt->lineno);
*_sqlda = sqlda_new;
ecpg_set_compat_sqlda(stmt->lineno, _sqlda, stmt->results, i, stmt->compat);
ecpg_log("ecpg_process_output on line %d: putting result (1 tuple %d fields) into sqlda descriptor\n",
stmt->lineno, PQnfields(stmt->results));
sqlda_new->desc_next = sqlda;
sqlda = sqlda_new;
}
}
}
else
{
struct sqlda_struct **_sqlda = (struct sqlda_struct **) var->pointer;
struct sqlda_struct *sqlda = *_sqlda;
struct sqlda_struct *sqlda_new;
int i;
/*
* If we are passed in a previously existing sqlda (chain)
* then free it.
*/
while (sqlda)
{
sqlda_new = sqlda->desc_next;
free(sqlda);
sqlda = sqlda_new;
}
*_sqlda = sqlda = sqlda_new = NULL;
for (i = ntuples - 1; i >= 0; i--)
{
/*
* Build a new sqlda structure. Note that only
* fetching 1 record is supported
*/
sqlda_new = ecpg_build_native_sqlda(stmt->lineno, stmt->results, i, stmt->compat);
if (!sqlda_new)
{
/* cleanup all SQLDAs we created up */
while (sqlda)
{
sqlda_new = sqlda->desc_next;
free(sqlda);
sqlda = sqlda_new;
}
*_sqlda = NULL;
ecpg_log("ecpg_process_output on line %d: out of memory allocating a new sqlda\n", stmt->lineno);
status = false;
break;
}
else
{
ecpg_log("ecpg_process_output on line %d: new sqlda was built\n", stmt->lineno);
*_sqlda = sqlda_new;
ecpg_set_native_sqlda(stmt->lineno, _sqlda, stmt->results, i, stmt->compat);
ecpg_log("ecpg_process_output on line %d: putting result (1 tuple %d fields) into sqlda descriptor\n",
stmt->lineno, PQnfields(stmt->results));
sqlda_new->desc_next = sqlda;
sqlda = sqlda_new;
}
}
}
var = var->next;
}
else
for (act_field = 0; act_field < nfields && status; act_field++)
{
if (var != NULL)
{
status = ecpg_store_result(stmt->results, act_field, stmt, var);
var = var->next;
}
else if (!INFORMIX_MODE(stmt->compat))
{
ecpg_raise(stmt->lineno, ECPG_TOO_FEW_ARGUMENTS, ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_TARGETS, NULL);
return false;
}
}
if (status && var != NULL)
{
ecpg_raise(stmt->lineno, ECPG_TOO_MANY_ARGUMENTS, ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_TARGETS, NULL);
status = false;
}
break;
case PGRES_COMMAND_OK:
status = true;
cmdstat = PQcmdStatus(stmt->results);
sqlca->sqlerrd[1] = PQoidValue(stmt->results);
sqlca->sqlerrd[2] = atol(PQcmdTuples(stmt->results));
ecpg_log("ecpg_process_output on line %d: OK: %s\n", stmt->lineno, cmdstat);
if (stmt->compat != ECPG_COMPAT_INFORMIX_SE &&
!sqlca->sqlerrd[2] &&
(strncmp(cmdstat, "UPDATE", 6) == 0
|| strncmp(cmdstat, "INSERT", 6) == 0
|| strncmp(cmdstat, "DELETE", 6) == 0))
ecpg_raise(stmt->lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL);
break;
case PGRES_COPY_OUT:
{
char *buffer;
int res;
ecpg_log("ecpg_process_output on line %d: COPY OUT data transfer in progress\n", stmt->lineno);
while ((res = PQgetCopyData(stmt->connection->connection,
&buffer, 0)) > 0)
{
printf("%s", buffer);
PQfreemem(buffer);
}
if (res == -1)
{
/* COPY done */
PQclear(stmt->results);
stmt->results = PQgetResult(stmt->connection->connection);
if (PQresultStatus(stmt->results) == PGRES_COMMAND_OK)
ecpg_log("ecpg_process_output on line %d: got PGRES_COMMAND_OK after PGRES_COPY_OUT\n", stmt->lineno);
else
ecpg_log("ecpg_process_output on line %d: got error after PGRES_COPY_OUT: %s", stmt->lineno, PQresultErrorMessage(stmt->results));
}
break;
}
default:
/*
* execution should never reach this code because it is already
* handled in ecpg_check_PQresult()
*/
ecpg_log("ecpg_process_output on line %d: unknown execution status type\n",
stmt->lineno);
ecpg_raise_backend(stmt->lineno, stmt->results, stmt->connection->connection, stmt->compat);
status = false;
break;
}
if (clear_result)
{
PQclear(stmt->results);
stmt->results = NULL;
}
/* check for asynchronous returns */
PQconsumeInput(stmt->connection->connection);
while ((notify = PQnotifies(stmt->connection->connection)) != NULL)
{
ecpg_log("ecpg_process_output on line %d: asynchronous notification of \"%s\" from backend PID %d received\n",
stmt->lineno, notify->relname, notify->be_pid);
PQfreemem(notify);
PQconsumeInput(stmt->connection->connection);
}
return status;
}
/*
* ecpg_do_prologue
*
* Initialize various infrastructure elements for executing the statement:
*
* - create the statement structure
* - set the C numeric locale for communicating with the backend
* - preprocess the variable list of input/output parameters into
* linked lists
*/
bool
ecpg_do_prologue(int lineno, const int compat, const int force_indicator,
const char *connection_name, const bool questionmarks,
enum ECPG_statement_type statement_type, const char *query,
va_list args, struct statement **stmt_out)
{
struct statement *stmt = NULL;
struct connection *con;
enum ECPGttype type;
struct variable **list;
char *prepname;
bool is_prepared_name_set;
*stmt_out = NULL;
if (!query)
{
ecpg_raise(lineno, ECPG_EMPTY, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, NULL);
return false;
}
stmt = (struct statement *) ecpg_alloc(sizeof(struct statement), lineno);
if (stmt == NULL)
return false;
/*
* Make sure we do NOT honor the locale for numeric input/output since the
* database wants the standard decimal point. If available, use
* uselocale() for this because it's thread-safe. Windows doesn't have
* that, but it usually does have _configthreadlocale(). In some versions
* of MinGW, _configthreadlocale() exists but always returns -1 --- so
* treat that situation as if the function doesn't exist.
*/
#ifdef HAVE_USELOCALE
stmt->clocale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
if (stmt->clocale == (locale_t) 0)
{
ecpg_do_epilogue(stmt);
return false;
}
stmt->oldlocale = uselocale(stmt->clocale);
if (stmt->oldlocale == (locale_t) 0)
{
ecpg_do_epilogue(stmt);
return false;
}
#else
#ifdef HAVE__CONFIGTHREADLOCALE
stmt->oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
#endif
stmt->oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
if (stmt->oldlocale == NULL)
{
ecpg_do_epilogue(stmt);
return false;
}
setlocale(LC_NUMERIC, "C");
#endif
#ifdef ENABLE_THREAD_SAFETY
ecpg_pthreads_init();
#endif
con = ecpg_get_connection(connection_name);
if (!ecpg_init(con, connection_name, lineno))
{
ecpg_do_epilogue(stmt);
return false;
}
/*
* If statement type is ECPGst_prepnormal we are supposed to prepare the
* statement before executing them
*/
if (statement_type == ECPGst_prepnormal)
{
if (!ecpg_auto_prepare(lineno, connection_name, compat, &prepname, query))
{
ecpg_do_epilogue(stmt);
return false;
}
/*
* statement is now prepared, so instead of the query we have to
* execute the name
*/
stmt->command = prepname;
statement_type = ECPGst_execute;
}
else
stmt->command = ecpg_strdup(query, lineno);
stmt->name = NULL;
if (statement_type == ECPGst_execute)
{
/* if we have an EXECUTE command, only the name is send */
char *command = ecpg_prepared(stmt->command, con);
if (command)
{
stmt->name = stmt->command;
stmt->command = ecpg_strdup(command, lineno);
}
else
{
ecpg_raise(lineno, ECPG_INVALID_STMT, ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME, stmt->command);
ecpg_do_epilogue(stmt);
return false;
}
}
/* name of PREPARE AS will be set in loop of inlist */
stmt->connection = con;
stmt->lineno = lineno;
stmt->compat = compat;
stmt->force_indicator = force_indicator;
stmt->questionmarks = questionmarks;
stmt->statement_type = statement_type;
/*------
* create a list of variables
*
* The variables are listed with input variables preceding output
* variables. The end of each group is marked by an end marker.
* Per variable we list:
*
* type - as defined in ecpgtype.h
* value - where to store the data
* varcharsize - length of string in case we have a stringvariable, else 0
* arraysize - 0 for pointer (we don't know the size of the array), 1 for
* simple variable, size for arrays
* offset - offset between ith and (i+1)th entry in an array, normally
* that means sizeof(type)
* ind_type - type of indicator variable
* ind_pointer - pointer to indicator variable
* ind_varcharsize - empty
* ind_arrsize - arraysize of indicator array
* ind_offset - indicator offset
*------
*/
is_prepared_name_set = false;
list = &(stmt->inlist);
type = va_arg(args, enum ECPGttype);
while (type != ECPGt_EORT)
{
if (type == ECPGt_EOIT)
list = &(stmt->outlist);
else
{
struct variable *var,
*ptr;
if (!(var = (struct variable *) ecpg_alloc(sizeof(struct variable), lineno)))
{
ecpg_do_epilogue(stmt);
return false;
}
var->type = type;
var->pointer = va_arg(args, char *);
var->varcharsize = va_arg(args, long);
var->arrsize = va_arg(args, long);
var->offset = va_arg(args, long);
/*
* Unknown array size means pointer to an array. Unknown
* varcharsize usually also means pointer. But if the type is
* character and the array size is known, it is an array of
* pointers to char, so use var->pointer as it is.
*/
if (var->arrsize == 0 ||
(var->varcharsize == 0 && ((var->type != ECPGt_char && var->type != ECPGt_unsigned_char) || (var->arrsize <= 1))))
var->value = *((char **) (var->pointer));
else
var->value = var->pointer;
/*
* negative values are used to indicate an array without given
* bounds
*/
/* reset to zero for us */
if (var->arrsize < 0)
var->arrsize = 0;
if (var->varcharsize < 0)
var->varcharsize = 0;
var->next = NULL;
var->ind_type = va_arg(args, enum ECPGttype);
var->ind_pointer = va_arg(args, char *);
var->ind_varcharsize = va_arg(args, long);
var->ind_arrsize = va_arg(args, long);
var->ind_offset = va_arg(args, long);
if (var->ind_type != ECPGt_NO_INDICATOR
&& (var->ind_arrsize == 0 || var->ind_varcharsize == 0))
var->ind_value = *((char **) (var->ind_pointer));
else
var->ind_value = var->ind_pointer;
/*
* negative values are used to indicate an array without given
* bounds
*/
/* reset to zero for us */
if (var->ind_arrsize < 0)
var->ind_arrsize = 0;
if (var->ind_varcharsize < 0)
var->ind_varcharsize = 0;
/* if variable is NULL, the statement hasn't been prepared */
if (var->pointer == NULL)
{
ecpg_raise(lineno, ECPG_INVALID_STMT, ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME, NULL);
ecpg_free(var);
ecpg_do_epilogue(stmt);
return false;
}
for (ptr = *list; ptr && ptr->next; ptr = ptr->next)
;
if (ptr == NULL)
*list = var;
else
ptr->next = var;
if (!is_prepared_name_set && stmt->statement_type == ECPGst_prepare)
{
stmt->name = ecpg_strdup(var->value, lineno);
is_prepared_name_set = true;
}
}
type = va_arg(args, enum ECPGttype);
}
/* are we connected? */
if (con == NULL || con->connection == NULL)
{
ecpg_raise(lineno, ECPG_NOT_CONN, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, (con) ? con->name : ecpg_gettext("<empty>"));
ecpg_do_epilogue(stmt);
return false;
}
if (!is_prepared_name_set && stmt->statement_type == ECPGst_prepare)
{
ecpg_raise(lineno, ECPG_TOO_FEW_ARGUMENTS, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, (con) ? con->name : ecpg_gettext("<empty>"));
ecpg_do_epilogue(stmt);
return false;
}
/* initialize auto_mem struct */
ecpg_clear_auto_mem();
*stmt_out = stmt;
return true;
}
/*
* ecpg_do_epilogue
* Restore the application locale and free the statement structure.
*/
void
ecpg_do_epilogue(struct statement *stmt)
{
if (stmt == NULL)
return;
#ifdef HAVE_USELOCALE
if (stmt->oldlocale != (locale_t) 0)
uselocale(stmt->oldlocale);
#else
if (stmt->oldlocale)
setlocale(LC_NUMERIC, stmt->oldlocale);
#ifdef HAVE__CONFIGTHREADLOCALE
/*
* This is a bit trickier than it looks: if we failed partway through
* statement initialization, oldthreadlocale could still be 0. But that's
* okay because a call with 0 is defined to be a no-op.
*/
if (stmt->oldthreadlocale != -1)
(void) _configthreadlocale(stmt->oldthreadlocale);
#endif
#endif
free_statement(stmt);
}
/*
* Execute SQL statements in the backend.
* The input/output parameters (variable argument list) are passed
* in a va_list, so other functions can use this interface.
*/
bool
ecpg_do(const int lineno, const int compat, const int force_indicator, const char *connection_name, const bool questionmarks, const int st, const char *query, va_list args)
{
struct statement *stmt = NULL;
if (!ecpg_do_prologue(lineno, compat, force_indicator, connection_name,
questionmarks, (enum ECPG_statement_type) st,
query, args, &stmt))
goto fail;
if (!ecpg_build_params(stmt))
goto fail;
if (!ecpg_autostart_transaction(stmt))
goto fail;
if (!ecpg_execute(stmt))
goto fail;
if (!ecpg_process_output(stmt, true))
goto fail;
ecpg_do_epilogue(stmt);
return true;
fail:
ecpg_do_epilogue(stmt);
return false;
}
/*
* Execute SQL statements in the backend.
* The input/output parameters are passed as variable-length argument list.
*/
bool
ECPGdo(const int lineno, const int compat, const int force_indicator, const char *connection_name, const bool questionmarks, const int st, const char *query,...)
{
va_list args;
bool ret;
va_start(args, query);
ret = ecpg_do(lineno, compat, force_indicator, connection_name,
questionmarks, st, query, args);
va_end(args);
return ret;
}
/* old descriptor interface */
bool
ECPGdo_descriptor(int line, const char *connection,
const char *descriptor, const char *query)
{
return ECPGdo(line, ECPG_COMPAT_PGSQL, true, connection, '\0', 0, query, ECPGt_EOIT,
ECPGt_descriptor, descriptor, 0L, 0L, 0L,
ECPGt_NO_INDICATOR, NULL, 0L, 0L, 0L, ECPGt_EORT);
}
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