/* 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);
#ifndef HAVE_USELOCALE
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), MONEYOID, 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 = (atoi(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 slen = strlen(PQgetvalue(results, act_tuple, act_field)) + 1 ;
if (slen > var->varcharsize)
var->varcharsize = slen;
}
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 *) ¤t_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 < 0 L)
*tobeinserted_p = NULL;
break ;
case ECPGt_long_long:
case ECPGt_unsigned_long_long:
if (*(long long int *) var->ind_value < (long long ) 0 )
*tobeinserted_p = NULL;
break ;
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 ;
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 ;
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_bytea *variable =
(struct ECPGgeneric_bytea *) (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_bytea *) (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
{
bool realloc_failed = false ;
char **newparamvalues;
int *newparamlengths;
int *newparamformats;
/* enlarge all the param arrays */
if ((newparamvalues = (char **) ecpg_realloc(stmt->paramvalues, sizeof (char *) * (stmt->nparams + 1 ), stmt->lineno)))
stmt->paramvalues = newparamvalues;
else
realloc_failed = true ;
if ((newparamlengths = (int *) ecpg_realloc(stmt->paramlengths, sizeof (int ) * (stmt->nparams + 1 ), stmt->lineno)))
stmt->paramlengths = newparamlengths;
else
realloc_failed = true ;
if ((newparamformats = (int *) ecpg_realloc(stmt->paramformats, sizeof (int ) * (stmt->nparams + 1 ), stmt->lineno)))
stmt->paramformats = newparamformats;
else
realloc_failed = true ;
if (realloc_failed)
{
ecpg_free_params(stmt, false );
ecpg_free(tobeinserted);
return false ;
}
/* only now can we assign ownership of "tobeinserted" to stmt */
stmt->paramvalues[stmt->nparams] = tobeinserted;
stmt->paramlengths[stmt->nparams] = binary_length;
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
{
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 ;
}
ecpg_pthreads_init();
con = ecpg_get_connection(connection_name);
if (!ecpg_init(con, connection_name, lineno))
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 does have _ configthreadlocale ( ) .
*/
#ifdef HAVE_USELOCALE
/*
* Since ecpg_init ( ) succeeded , we have a connection . Any successful
* connection initializes ecpg_clocale .
*/
Assert(ecpg_clocale);
stmt->oldlocale = uselocale(ecpg_clocale);
if (stmt->oldlocale == (locale_t) 0 )
{
ecpg_do_epilogue(stmt);
return false ;
}
#else
#ifdef WIN32
stmt->oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
if (stmt->oldthreadlocale == -1 )
{
ecpg_do_epilogue(stmt);
return false ;
}
#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
/*
* 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 WIN32
_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, 0 L, 0 L, 0 L,
ECPGt_NO_INDICATOR, NULL, 0 L, 0 L, 0 L, ECPGt_EORT);
}
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