greenplumn descriptor 源码
greenplumn descriptor 代码
文件路径：/src/interfaces/ecpg/ecpglib/descriptor.c
/* dynamic SQL support routines
*
* src/interfaces/ecpg/ecpglib/descriptor.c
*/
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
#include "catalog/pg_type_d.h"
#include "ecpg-pthread-win32.h"
#include "ecpgtype.h"
#include "ecpglib.h"
#include "ecpgerrno.h"
#include "ecpglib_extern.h"
#include "sqlca.h"
#include "sqlda.h"
#include "sql3types.h"
static void descriptor_free(struct descriptor *desc);
/* We manage descriptors separately for each thread. */
#ifdef ENABLE_THREAD_SAFETY
static pthread_key_t descriptor_key;
static pthread_once_t descriptor_once = PTHREAD_ONCE_INIT;
static void descriptor_deallocate_all(struct descriptor *list);
static void
descriptor_destructor(void *arg)
{
descriptor_deallocate_all(arg);
}
static void
descriptor_key_init(void)
{
pthread_key_create(&descriptor_key, descriptor_destructor);
}
static struct descriptor *
get_descriptors(void)
{
pthread_once(&descriptor_once, descriptor_key_init);
return (struct descriptor *) pthread_getspecific(descriptor_key);
}
static void
set_descriptors(struct descriptor *value)
{
pthread_setspecific(descriptor_key, value);
}
#else
static struct descriptor *all_descriptors = NULL;
#define get_descriptors() (all_descriptors)
#define set_descriptors(value) do { all_descriptors = (value); } while(0)
#endif
/* old internal convenience function that might go away later */
static PGresult *
ecpg_result_by_descriptor(int line, const char *name)
{
struct descriptor *desc = ecpg_find_desc(line, name);
if (desc == NULL)
return NULL;
return desc->result;
}
static unsigned int
ecpg_dynamic_type_DDT(Oid type)
{
switch (type)
{
case DATEOID:
return SQL3_DDT_DATE;
case TIMEOID:
return SQL3_DDT_TIME;
case TIMESTAMPOID:
return SQL3_DDT_TIMESTAMP;
case TIMESTAMPTZOID:
return SQL3_DDT_TIMESTAMP_WITH_TIME_ZONE;
case TIMETZOID:
return SQL3_DDT_TIME_WITH_TIME_ZONE;
default:
return SQL3_DDT_ILLEGAL;
}
}
bool
ECPGget_desc_header(int lineno, const char *desc_name, int *count)
{
PGresult *ECPGresult;
struct sqlca_t *sqlca = ECPGget_sqlca();
if (sqlca == NULL)
{
ecpg_raise(lineno, ECPG_OUT_OF_MEMORY,
ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
ecpg_init_sqlca(sqlca);
ECPGresult = ecpg_result_by_descriptor(lineno, desc_name);
if (!ECPGresult)
return false;
*count = PQnfields(ECPGresult);
sqlca->sqlerrd[2] = 1;
ecpg_log("ECPGget_desc_header: found %d attributes\n", *count);
return true;
}
static bool
get_int_item(int lineno, void *var, enum ECPGttype vartype, int value)
{
switch (vartype)
{
case ECPGt_short:
*(short *) var = (short) value;
break;
case ECPGt_int:
*(int *) var = (int) value;
break;
case ECPGt_long:
*(long *) var = (long) value;
break;
case ECPGt_unsigned_short:
*(unsigned short *) var = (unsigned short) value;
break;
case ECPGt_unsigned_int:
*(unsigned int *) var = (unsigned int) value;
break;
case ECPGt_unsigned_long:
*(unsigned long *) var = (unsigned long) value;
break;
#ifdef HAVE_LONG_LONG_INT
case ECPGt_long_long:
*(long long int *) var = (long long int) value;
break;
case ECPGt_unsigned_long_long:
*(unsigned long long int *) var = (unsigned long long int) value;
break;
#endif /* HAVE_LONG_LONG_INT */
case ECPGt_float:
*(float *) var = (float) value;
break;
case ECPGt_double:
*(double *) var = (double) value;
break;
default:
ecpg_raise(lineno, ECPG_VAR_NOT_NUMERIC, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
return false;
}
return true;
}
static bool
set_int_item(int lineno, int *target, const void *var, enum ECPGttype vartype)
{
switch (vartype)
{
case ECPGt_short:
*target = *(const short *) var;
break;
case ECPGt_int:
*target = *(const int *) var;
break;
case ECPGt_long:
*target = *(const long *) var;
break;
case ECPGt_unsigned_short:
*target = *(const unsigned short *) var;
break;
case ECPGt_unsigned_int:
*target = *(const unsigned int *) var;
break;
case ECPGt_unsigned_long:
*target = *(const unsigned long *) var;
break;
#ifdef HAVE_LONG_LONG_INT
case ECPGt_long_long:
*target = *(const long long int *) var;
break;
case ECPGt_unsigned_long_long:
*target = *(const unsigned long long int *) var;
break;
#endif /* HAVE_LONG_LONG_INT */
case ECPGt_float:
*target = *(const float *) var;
break;
case ECPGt_double:
*target = *(const double *) var;
break;
default:
ecpg_raise(lineno, ECPG_VAR_NOT_NUMERIC, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
return false;
}
return true;
}
static bool
get_char_item(int lineno, void *var, enum ECPGttype vartype, char *value, int varcharsize)
{
switch (vartype)
{
case ECPGt_char:
case ECPGt_unsigned_char:
case ECPGt_string:
strncpy((char *) var, value, varcharsize);
break;
case ECPGt_varchar:
{
struct ECPGgeneric_varchar *variable =
(struct ECPGgeneric_varchar *) var;
if (varcharsize == 0)
memcpy(variable->arr, value, strlen(value));
else
strncpy(variable->arr, value, varcharsize);
variable->len = strlen(value);
if (varcharsize > 0 && variable->len > varcharsize)
variable->len = varcharsize;
}
break;
default:
ecpg_raise(lineno, ECPG_VAR_NOT_CHAR, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
return false;
}
return true;
}
#define RETURN_IF_NO_DATA if (ntuples < 1) \
{ \
va_end(args); \
ecpg_raise(lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL); \
return false; \
}
bool
ECPGget_desc(int lineno, const char *desc_name, int index,...)
{
va_list args;
PGresult *ECPGresult;
enum ECPGdtype type;
int ntuples,
act_tuple;
struct variable data_var;
struct sqlca_t *sqlca = ECPGget_sqlca();
if (sqlca == NULL)
{
ecpg_raise(lineno, ECPG_OUT_OF_MEMORY,
ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
va_start(args, index);
ecpg_init_sqlca(sqlca);
ECPGresult = ecpg_result_by_descriptor(lineno, desc_name);
if (!ECPGresult)
{
va_end(args);
return false;
}
ntuples = PQntuples(ECPGresult);
if (index < 1 || index > PQnfields(ECPGresult))
{
ecpg_raise(lineno, ECPG_INVALID_DESCRIPTOR_INDEX, ECPG_SQLSTATE_INVALID_DESCRIPTOR_INDEX, NULL);
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: reading items for tuple %d\n", index);
--index;
type = va_arg(args, enum ECPGdtype);
memset(&data_var, 0, sizeof data_var);
data_var.type = ECPGt_EORT;
data_var.ind_type = ECPGt_NO_INDICATOR;
while (type != ECPGd_EODT)
{
char type_str[20];
long varcharsize;
long offset;
long arrsize;
enum ECPGttype vartype;
void *var;
vartype = va_arg(args, enum ECPGttype);
var = va_arg(args, void *);
varcharsize = va_arg(args, long);
arrsize = va_arg(args, long);
offset = va_arg(args, long);
switch (type)
{
case (ECPGd_indicator):
RETURN_IF_NO_DATA;
data_var.ind_type = vartype;
data_var.ind_pointer = var;
data_var.ind_varcharsize = varcharsize;
data_var.ind_arrsize = arrsize;
data_var.ind_offset = offset;
if (data_var.ind_arrsize == 0 || data_var.ind_varcharsize == 0)
data_var.ind_value = *((void **) (data_var.ind_pointer));
else
data_var.ind_value = data_var.ind_pointer;
break;
case ECPGd_data:
RETURN_IF_NO_DATA;
data_var.type = vartype;
data_var.pointer = var;
data_var.varcharsize = varcharsize;
data_var.arrsize = arrsize;
data_var.offset = offset;
if (data_var.arrsize == 0 || data_var.varcharsize == 0)
data_var.value = *((void **) (data_var.pointer));
else
data_var.value = data_var.pointer;
break;
case ECPGd_name:
if (!get_char_item(lineno, var, vartype, PQfname(ECPGresult, index), varcharsize))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: NAME = %s\n", PQfname(ECPGresult, index));
break;
case ECPGd_nullable:
if (!get_int_item(lineno, var, vartype, 1))
{
va_end(args);
return false;
}
break;
case ECPGd_key_member:
if (!get_int_item(lineno, var, vartype, 0))
{
va_end(args);
return false;
}
break;
case ECPGd_scale:
if (!get_int_item(lineno, var, vartype, (PQfmod(ECPGresult, index) - VARHDRSZ) & 0xffff))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: SCALE = %d\n", (PQfmod(ECPGresult, index) - VARHDRSZ) & 0xffff);
break;
case ECPGd_precision:
if (!get_int_item(lineno, var, vartype, PQfmod(ECPGresult, index) >> 16))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: PRECISION = %d\n", PQfmod(ECPGresult, index) >> 16);
break;
case ECPGd_octet:
if (!get_int_item(lineno, var, vartype, PQfsize(ECPGresult, index)))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: OCTET_LENGTH = %d\n", PQfsize(ECPGresult, index));
break;
case ECPGd_length:
if (!get_int_item(lineno, var, vartype, PQfmod(ECPGresult, index) - VARHDRSZ))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: LENGTH = %d\n", PQfmod(ECPGresult, index) - VARHDRSZ);
break;
case ECPGd_type:
if (!get_int_item(lineno, var, vartype, ecpg_dynamic_type(PQftype(ECPGresult, index))))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: TYPE = %d\n", ecpg_dynamic_type(PQftype(ECPGresult, index)));
break;
case ECPGd_di_code:
if (!get_int_item(lineno, var, vartype, ecpg_dynamic_type_DDT(PQftype(ECPGresult, index))))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: TYPE = %d\n", ecpg_dynamic_type_DDT(PQftype(ECPGresult, index)));
break;
case ECPGd_cardinality:
if (!get_int_item(lineno, var, vartype, PQntuples(ECPGresult)))
{
va_end(args);
return false;
}
ecpg_log("ECPGget_desc: CARDINALITY = %d\n", PQntuples(ECPGresult));
break;
case ECPGd_ret_length:
case ECPGd_ret_octet:
RETURN_IF_NO_DATA;
/*
* this is like ECPGstore_result
*/
if (arrsize > 0 && ntuples > arrsize)
{
ecpg_log("ECPGget_desc on line %d: incorrect number of matches; %d don't fit into array of %ld\n",
lineno, ntuples, arrsize);
ecpg_raise(lineno, ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
va_end(args);
return false;
}
/* allocate storage if needed */
if (arrsize == 0 && *(void **) var == NULL)
{
void *mem = (void *) ecpg_auto_alloc(offset * ntuples, lineno);
if (!mem)
{
va_end(args);
return false;
}
*(void **) var = mem;
var = mem;
}
for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
{
if (!get_int_item(lineno, var, vartype, PQgetlength(ECPGresult, act_tuple, index)))
{
va_end(args);
return false;
}
var = (char *) var + offset;
ecpg_log("ECPGget_desc: RETURNED[%d] = %d\n", act_tuple, PQgetlength(ECPGresult, act_tuple, index));
}
break;
default:
snprintf(type_str, sizeof(type_str), "%d", type);
ecpg_raise(lineno, ECPG_UNKNOWN_DESCRIPTOR_ITEM, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, type_str);
va_end(args);
return false;
}
type = va_arg(args, enum ECPGdtype);
}
if (data_var.type != ECPGt_EORT)
{
struct statement stmt;
memset(&stmt, 0, sizeof stmt);
stmt.lineno = lineno;
/* Make sure we do NOT honor the locale for numeric input */
/* since the database gives the standard decimal point */
/* (see comments in execute.c) */
#ifdef HAVE_USELOCALE
stmt.clocale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
if (stmt.clocale != (locale_t) 0)
stmt.oldlocale = uselocale(stmt.clocale);
#else
#ifdef HAVE__CONFIGTHREADLOCALE
stmt.oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
#endif
stmt.oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
setlocale(LC_NUMERIC, "C");
#endif
/* desperate try to guess something sensible */
stmt.connection = ecpg_get_connection(NULL);
ecpg_store_result(ECPGresult, index, &stmt, &data_var);
#ifdef HAVE_USELOCALE
if (stmt.oldlocale != (locale_t) 0)
uselocale(stmt.oldlocale);
if (stmt.clocale)
freelocale(stmt.clocale);
#else
if (stmt.oldlocale)
{
setlocale(LC_NUMERIC, stmt.oldlocale);
ecpg_free(stmt.oldlocale);
}
#ifdef HAVE__CONFIGTHREADLOCALE
if (stmt.oldthreadlocale != -1)
(void) _configthreadlocale(stmt.oldthreadlocale);
#endif
#endif
}
else if (data_var.ind_type != ECPGt_NO_INDICATOR && data_var.ind_pointer != NULL)
/*
* ind_type != NO_INDICATOR should always have ind_pointer != NULL but
* since this might be changed manually in the .c file let's play it
* safe
*/
{
/*
* this is like ECPGstore_result but since we don't have a data
* variable at hand, we can't call it
*/
if (data_var.ind_arrsize > 0 && ntuples > data_var.ind_arrsize)
{
ecpg_log("ECPGget_desc on line %d: incorrect number of matches (indicator); %d don't fit into array of %ld\n",
lineno, ntuples, data_var.ind_arrsize);
ecpg_raise(lineno, ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
va_end(args);
return false;
}
/* allocate storage if needed */
if (data_var.ind_arrsize == 0 && data_var.ind_value == NULL)
{
void *mem = (void *) ecpg_auto_alloc(data_var.ind_offset * ntuples, lineno);
if (!mem)
{
va_end(args);
return false;
}
*(void **) data_var.ind_pointer = mem;
data_var.ind_value = mem;
}
for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
{
if (!get_int_item(lineno, data_var.ind_value, data_var.ind_type, -PQgetisnull(ECPGresult, act_tuple, index)))
{
va_end(args);
return false;
}
data_var.ind_value = (char *) data_var.ind_value + data_var.ind_offset;
ecpg_log("ECPGget_desc: INDICATOR[%d] = %d\n", act_tuple, -PQgetisnull(ECPGresult, act_tuple, index));
}
}
sqlca->sqlerrd[2] = ntuples;
va_end(args);
return true;
}
#undef RETURN_IF_NO_DATA
bool
ECPGset_desc_header(int lineno, const char *desc_name, int count)
{
struct descriptor *desc = ecpg_find_desc(lineno, desc_name);
if (desc == NULL)
return false;
desc->count = count;
return true;
}
static void
set_desc_attr(struct descriptor_item *desc_item, struct variable *var,
char *tobeinserted)
{
if (var->type != ECPGt_bytea)
desc_item->is_binary = false;
else
{
struct ECPGgeneric_varchar *variable =
(struct ECPGgeneric_varchar *) (var->value);
desc_item->is_binary = true;
desc_item->data_len = variable->len;
}
ecpg_free(desc_item->data); /* free() takes care of a potential NULL value */
desc_item->data = (char *) tobeinserted;
}
bool
ECPGset_desc(int lineno, const char *desc_name, int index,...)
{
va_list args;
struct descriptor *desc;
struct descriptor_item *desc_item;
struct variable *var;
desc = ecpg_find_desc(lineno, desc_name);
if (desc == NULL)
return false;
for (desc_item = desc->items; desc_item; desc_item = desc_item->next)
{
if (desc_item->num == index)
break;
}
if (desc_item == NULL)
{
desc_item = (struct descriptor_item *) ecpg_alloc(sizeof(*desc_item), lineno);
if (!desc_item)
return false;
desc_item->num = index;
if (desc->count < index)
desc->count = index;
desc_item->next = desc->items;
desc->items = desc_item;
}
if (!(var = (struct variable *) ecpg_alloc(sizeof(struct variable), lineno)))
return false;
va_start(args, index);
for (;;)
{
enum ECPGdtype itemtype;
char *tobeinserted = NULL;
itemtype = va_arg(args, enum ECPGdtype);
if (itemtype == ECPGd_EODT)
break;
var->type = va_arg(args, enum ECPGttype);
var->pointer = va_arg(args, char *);
var->varcharsize = va_arg(args, long);
var->arrsize = va_arg(args, long);
var->offset = va_arg(args, long);
if (var->arrsize == 0 || var->varcharsize == 0)
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;
switch (itemtype)
{
case ECPGd_data:
{
if (!ecpg_store_input(lineno, true, var, &tobeinserted, false))
{
ecpg_free(var);
va_end(args);
return false;
}
set_desc_attr(desc_item, var, tobeinserted);
tobeinserted = NULL;
break;
}
case ECPGd_indicator:
set_int_item(lineno, &desc_item->indicator, var->pointer, var->type);
break;
case ECPGd_length:
set_int_item(lineno, &desc_item->length, var->pointer, var->type);
break;
case ECPGd_precision:
set_int_item(lineno, &desc_item->precision, var->pointer, var->type);
break;
case ECPGd_scale:
set_int_item(lineno, &desc_item->scale, var->pointer, var->type);
break;
case ECPGd_type:
set_int_item(lineno, &desc_item->type, var->pointer, var->type);
break;
default:
{
char type_str[20];
snprintf(type_str, sizeof(type_str), "%d", itemtype);
ecpg_raise(lineno, ECPG_UNKNOWN_DESCRIPTOR_ITEM, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, type_str);
ecpg_free(var);
va_end(args);
return false;
}
}
}
ecpg_free(var);
va_end(args);
return true;
}
/* Free the descriptor and items in it. */
static void
descriptor_free(struct descriptor *desc)
{
struct descriptor_item *desc_item;
for (desc_item = desc->items; desc_item;)
{
struct descriptor_item *di;
ecpg_free(desc_item->data);
di = desc_item;
desc_item = desc_item->next;
ecpg_free(di);
}
ecpg_free(desc->name);
PQclear(desc->result);
ecpg_free(desc);
}
bool
ECPGdeallocate_desc(int line, const char *name)
{
struct descriptor *desc;
struct descriptor *prev;
struct sqlca_t *sqlca = ECPGget_sqlca();
if (sqlca == NULL)
{
ecpg_raise(line, ECPG_OUT_OF_MEMORY,
ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
ecpg_init_sqlca(sqlca);
for (desc = get_descriptors(), prev = NULL; desc; prev = desc, desc = desc->next)
{
if (strcmp(name, desc->name) == 0)
{
if (prev)
prev->next = desc->next;
else
set_descriptors(desc->next);
descriptor_free(desc);
return true;
}
}
ecpg_raise(line, ECPG_UNKNOWN_DESCRIPTOR, ECPG_SQLSTATE_INVALID_SQL_DESCRIPTOR_NAME, name);
return false;
}
#ifdef ENABLE_THREAD_SAFETY
/* Deallocate all descriptors in the list */
static void
descriptor_deallocate_all(struct descriptor *list)
{
while (list)
{
struct descriptor *next = list->next;
descriptor_free(list);
list = next;
}
}
#endif /* ENABLE_THREAD_SAFETY */
bool
ECPGallocate_desc(int line, const char *name)
{
struct descriptor *new;
struct sqlca_t *sqlca = ECPGget_sqlca();
if (sqlca == NULL)
{
ecpg_raise(line, ECPG_OUT_OF_MEMORY,
ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
ecpg_init_sqlca(sqlca);
new = (struct descriptor *) ecpg_alloc(sizeof(struct descriptor), line);
if (!new)
return false;
new->next = get_descriptors();
new->name = ecpg_alloc(strlen(name) + 1, line);
if (!new->name)
{
ecpg_free(new);
return false;
}
new->count = -1;
new->items = NULL;
new->result = PQmakeEmptyPGresult(NULL, 0);
if (!new->result)
{
ecpg_free(new->name);
ecpg_free(new);
ecpg_raise(line, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return false;
}
strcpy(new->name, name);
set_descriptors(new);
return true;
}
/* Find descriptor with name in the connection. */
struct descriptor *
ecpg_find_desc(int line, const char *name)
{
struct descriptor *desc;
for (desc = get_descriptors(); desc; desc = desc->next)
{
if (strcmp(name, desc->name) == 0)
return desc;
}
ecpg_raise(line, ECPG_UNKNOWN_DESCRIPTOR, ECPG_SQLSTATE_INVALID_SQL_DESCRIPTOR_NAME, name);
return NULL; /* not found */
}
bool
ECPGdescribe(int line, int compat, bool input, const char *connection_name, const char *stmt_name,...)
{
bool ret = false;
struct connection *con;
struct prepared_statement *prep;
PGresult *res;
va_list args;
const char *real_connection_name = NULL;
/* DESCRIBE INPUT is not yet supported */
if (input)
{
ecpg_raise(line, ECPG_UNSUPPORTED, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, "DESCRIBE INPUT");
return ret;
}
real_connection_name = ecpg_get_con_name_by_declared_name(stmt_name);
if (real_connection_name == NULL)
{
/*
* If can't get the connection name by declared name then using
* connection name coming from the parameter connection_name
*/
real_connection_name = connection_name;
}
con = ecpg_get_connection(real_connection_name);
if (!con)
{
ecpg_raise(line, ECPG_NO_CONN, ECPG_SQLSTATE_CONNECTION_DOES_NOT_EXIST,
real_connection_name ? real_connection_name : ecpg_gettext("NULL"));
return ret;
}
prep = ecpg_find_prepared_statement(stmt_name, con, NULL);
if (!prep)
{
ecpg_raise(line, ECPG_INVALID_STMT, ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME, stmt_name);
return ret;
}
va_start(args, stmt_name);
for (;;)
{
enum ECPGttype type;
void *ptr;
/* variable type */
type = va_arg(args, enum ECPGttype);
if (type == ECPGt_EORT)
break;
/* rest of variable parameters */
ptr = va_arg(args, void *);
(void) va_arg(args, long); /* skip args */
(void) va_arg(args, long);
(void) va_arg(args, long);
/* variable indicator */
(void) va_arg(args, enum ECPGttype);
(void) va_arg(args, void *); /* skip args */
(void) va_arg(args, long);
(void) va_arg(args, long);
(void) va_arg(args, long);
switch (type)
{
case ECPGt_descriptor:
{
char *name = ptr;
struct descriptor *desc = ecpg_find_desc(line, name);
if (desc == NULL)
break;
res = PQdescribePrepared(con->connection, stmt_name);
if (!ecpg_check_PQresult(res, line, con->connection, compat))
break;
if (desc->result != NULL)
PQclear(desc->result);
desc->result = res;
ret = true;
break;
}
case ECPGt_sqlda:
{
if (INFORMIX_MODE(compat))
{
struct sqlda_compat **_sqlda = ptr;
struct sqlda_compat *sqlda;
res = PQdescribePrepared(con->connection, stmt_name);
if (!ecpg_check_PQresult(res, line, con->connection, compat))
break;
sqlda = ecpg_build_compat_sqlda(line, res, -1, compat);
if (sqlda)
{
struct sqlda_compat *sqlda_old = *_sqlda;
struct sqlda_compat *sqlda_old1;
while (sqlda_old)
{
sqlda_old1 = sqlda_old->desc_next;
free(sqlda_old);
sqlda_old = sqlda_old1;
}
*_sqlda = sqlda;
ret = true;
}
PQclear(res);
}
else
{
struct sqlda_struct **_sqlda = ptr;
struct sqlda_struct *sqlda;
res = PQdescribePrepared(con->connection, stmt_name);
if (!ecpg_check_PQresult(res, line, con->connection, compat))
break;
sqlda = ecpg_build_native_sqlda(line, res, -1, compat);
if (sqlda)
{
struct sqlda_struct *sqlda_old = *_sqlda;
struct sqlda_struct *sqlda_old1;
while (sqlda_old)
{
sqlda_old1 = sqlda_old->desc_next;
free(sqlda_old);
sqlda_old = sqlda_old1;
}
*_sqlda = sqlda;
ret = true;
}
PQclear(res);
}
break;
}
default:
/* nothing else may come */
;
}
}
va_end(args);
return ret;
}
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