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ibm_db.c
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ibm_db.c
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/*
+--------------------------------------------------------------------------+
| Licensed Materials - Property of IBM |
| |
| (C) Copyright IBM Corporation 2006-2020 |
+--------------------------------------------------------------------------+
| This module complies with SQLAlchemy 0.4 and is |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable |
| law or agreed to in writing, software distributed under the License is |
| distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the specific |
| language governing permissions and limitations under the License. |
+--------------------------------------------------------------------------+
| Authors: Manas Dadarkar, Salvador Ledezma, Sushant Koduru, |
| Lynh Nguyen, Kanchana Padmanabhan, Dan Scott, Helmut Tessarek, |
| Sam Ruby, Kellen Bombardier, Tony Cairns, Abhigyan Agrawal, |
| Tarun Pasrija, Rahul Priyadarshi, Akshay Anand, Saba Kauser , |
| Hemlata Bhatt |
+--------------------------------------------------------------------------+
*/
#define MODULE_RELEASE "3.2.3"
#include <Python.h>
#include <datetime.h>
#include "ibm_db.h"
#include <ctype.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#ifdef _LP64
#ifdef __MVS__
#define BIGINT_IS_SHORTER_THAN_LONG 0
#else
#define BIGINT_IS_SHORTER_THAN_LONG 1
#endif
#else
#define BIGINT_IS_SHORTER_THAN_LONG 1
#endif
/* MAX length for DECFLOAT */
#define MAX_DECFLOAT_LENGTH 44
/* True global resources - no need for thread safety here */
static struct _ibm_db_globals *ibm_db_globals;
static void _python_ibm_db_check_sql_errors( SQLHANDLE handle, SQLSMALLINT hType, int rc, int cpy_to_global, char* ret_str, int API, SQLSMALLINT recno );
static int _python_ibm_db_assign_options( void* handle, int type, long opt_key, PyObject *data );
static SQLWCHAR* getUnicodeDataAsSQLWCHAR(PyObject *pyobj, int *isNewBuffer);
static SQLCHAR* getUnicodeDataAsSQLCHAR(PyObject *pyobj, int *isNewBuffer);
static PyObject* getSQLWCharAsPyUnicodeObject(SQLWCHAR* sqlwcharData, int sqlwcharBytesLen);
const int _check_i = 1;
#define is_bigendian() ( (*(char*)&_check_i) == 0 )
static int is_systemi, is_informix; /* 1 == TRUE; 0 == FALSE; */
#ifdef _WIN32
#define DLOPEN LoadLibrary
#define DLSYM GetProcAddress
#define DLCLOSE FreeLibrary
#ifdef _WIN64
#define LIBDB2 "db2cli64.dll"
#else
#define LIBDB2 "db2cli.dll"
#endif
#elif _AIX
#define DLOPEN dlopen
#define DLSYM dlsym
#define DLCLOSE dlclose
#ifdef __64BIT__
/*64-bit library in the archive libdb2.a*/
#define LIBDB2 "libdb2.a(shr_64.o)"
#else
/*32-bit library in the archive libdb2.a*/
#define LIBDB2 "libdb2.a(shr.o)"
#endif
#elif __APPLE__
#define DLOPEN dlopen
#define DLSYM dlsym
#define DLCLOSE dlclose
#define LIBDB2 "libdb2.dylib"
#else
#define DLOPEN dlopen
#define DLSYM dlsym
#define DLCLOSE dlclose
#define LIBDB2 "libdb2.so.1"
#endif
/* Defines a linked list structure for error messages */
typedef struct _error_msg_node {
char err_msg[DB2_MAX_ERR_MSG_LEN];
struct _error_msg_node *next;
} error_msg_node;
/* Defines a linked list structure for caching param data */
typedef struct _param_cache_node {
SQLSMALLINT data_type; /* Datatype */
SQLUINTEGER param_size; /* param size */
SQLSMALLINT nullable; /* is Nullable */
SQLSMALLINT scale; /* Decimal scale */
SQLUINTEGER file_options; /* File options if PARAM_FILE */
SQLINTEGER bind_indicator; /* indicator variable for SQLBindParameter */
int param_num; /* param number in stmt */
int param_type; /* Type of param - INP/OUT/INP-OUT/FILE */
int size; /* Size of param */
char *varname; /* bound variable name */
PyObject *var_pyvalue; /* bound variable value */
SQLINTEGER ivalue; /* Temp storage value */
double fvalue; /* Temp storage value */
char *svalue; /* Temp storage value */
SQLWCHAR *uvalue; /* Temp storage value */
DATE_STRUCT *date_value; /* Temp storage value */
TIME_STRUCT *time_value; /* Temp storage value */
TIMESTAMP_STRUCT *ts_value; /* Temp storage value */
SQLINTEGER *ivalueArray; /* Temp storage array of values */
double *fvalueArray; /* Temp storage array of values */
SQLINTEGER *bind_indicator_array; /* Temp storage array of values */
struct _param_cache_node *next; /* Pointer to next node */
} param_node;
typedef struct _conn_handle_struct {
PyObject_HEAD
SQLHANDLE henv;
SQLHANDLE hdbc;
long auto_commit;
long c_bin_mode;
long c_case_mode;
long c_cursor_type;
long c_use_wchar;
int handle_active;
SQLSMALLINT error_recno_tracker;
SQLSMALLINT errormsg_recno_tracker;
int flag_pconnect; /* Indicates that this connection is persistent */
} conn_handle;
static void _python_ibm_db_free_conn_struct(conn_handle *handle);
static PyTypeObject conn_handleType = {
PyVarObject_HEAD_INIT(NULL, 0)
/* tp_name */ "ibm_db.IBM_DBConnection",
/* tp_basicsize */ sizeof(conn_handle),
/* tp_itemsize */ 0,
/* tp_dealloc */ (destructor)_python_ibm_db_free_conn_struct,
/* tp_print */ 0,
/* tp_getattr */ 0,
/* tp_setattr */ 0,
/* tp_compare */ 0,
/* tp_repr */ 0,
/* tp_as_number */ 0,
/* tp_as_sequence */ 0,
/* tp_as_mapping */ 0,
/* tp_hash */ 0,
/* tp_call */ 0,
/* tp_str */ 0,
/* tp_getattro */ 0,
/* tp_setattro */ 0,
/* tp_as_buffer */ 0,
/* tp_flags */ Py_TPFLAGS_DEFAULT,
/* tp_doc */ "IBM DataServer connection object",
/* tp_traverse */ 0,
/* tp_clear */ 0,
/* tp_richcompare */ 0,
/* tp_weaklistoffset */ 0,
/* tp_iter */ 0,
/* tp_iternext */ 0,
/* tp_methods */ 0,
/* tp_members */ 0,
/* tp_getset */ 0,
/* tp_base */ 0,
/* tp_dict */ 0,
/* tp_descr_get */ 0,
/* tp_descr_set */ 0,
/* tp_dictoffset */ 0,
/* tp_init */ 0,
};
typedef union {
SQLINTEGER i_val;
SQLDOUBLE d_val;
SQLFLOAT f_val;
SQLSMALLINT s_val;
SQLCHAR *str_val;
SQLREAL r_val;
SQLWCHAR *w_val;
TIMESTAMP_STRUCT *ts_val;
DATE_STRUCT *date_val;
TIME_STRUCT *time_val;
} ibm_db_row_data_type;
typedef struct {
SQLINTEGER out_length;
ibm_db_row_data_type data;
} ibm_db_row_type;
typedef struct _ibm_db_result_set_info_struct {
SQLCHAR *name;
SQLSMALLINT type;
SQLUINTEGER size;
SQLSMALLINT scale;
SQLSMALLINT nullable;
unsigned char *mem_alloc; /* Mem free */
} ibm_db_result_set_info;
typedef struct _row_hash_struct {
PyObject *hash;
} row_hash_struct;
typedef struct _stmt_handle_struct {
PyObject_HEAD
SQLHANDLE hdbc;
SQLHANDLE hstmt;
long s_bin_mode;
long cursor_type;
long s_case_mode;
long s_use_wchar;
SQLSMALLINT error_recno_tracker;
SQLSMALLINT errormsg_recno_tracker;
/* Parameter Caching variables */
param_node *head_cache_list;
param_node *current_node;
int num_params; /* Number of Params */
int file_param; /* if option passed in is FILE_PARAM */
int num_columns;
ibm_db_result_set_info *column_info;
ibm_db_row_type *row_data;
} stmt_handle;
static void _python_ibm_db_free_stmt_struct(stmt_handle *handle);
static PyTypeObject stmt_handleType = {
PyVarObject_HEAD_INIT(NULL, 0)
/* tp_name */ "ibm_db.IBM_DBStatement",
/* tp_basicsize */ sizeof(stmt_handle),
/* tp_itemsize */ 0,
/* tp_dealloc */ (destructor)_python_ibm_db_free_stmt_struct,
/* tp_print */ 0,
/* tp_getattr */ 0,
/* tp_setattr */ 0,
/* tp_compare */ 0,
/* tp_repr */ 0,
/* tp_as_number */ 0,
/* tp_as_sequence */ 0,
/* tp_as_mapping */ 0,
/* tp_hash */ 0,
/* tp_call */ 0,
/* tp_str */ 0,
/* tp_getattro */ 0,
/* tp_setattro */ 0,
/* tp_as_buffer */ 0,
/* tp_flags */ Py_TPFLAGS_DEFAULT,
/* tp_doc */ "IBM DataServer cursor object",
/* tp_traverse */ 0,
/* tp_clear */ 0,
/* tp_richcompare */ 0,
/* tp_weaklistoffset */ 0,
/* tp_iter */ 0,
/* tp_iternext */ 0,
/* tp_methods */ 0,
/* tp_members */ 0,
/* tp_getset */ 0,
/* tp_base */ 0,
/* tp_dict */ 0,
/* tp_descr_get */ 0,
/* tp_descr_set */ 0,
/* tp_dictoffset */ 0,
/* tp_init */ 0,
};
/* equivalent functions on different platforms */
#ifdef _WIN32
#define STRCASECMP stricmp
#else
#define STRCASECMP strcasecmp
#endif
static void python_ibm_db_init_globals(struct _ibm_db_globals *ibm_db_globals) {
/* env handle */
ibm_db_globals->bin_mode = 1;
memset(ibm_db_globals->__python_conn_err_msg, 0, DB2_MAX_ERR_MSG_LEN);
memset(ibm_db_globals->__python_stmt_err_msg, 0, DB2_MAX_ERR_MSG_LEN);
memset(ibm_db_globals->__python_conn_err_state, 0, SQL_SQLSTATE_SIZE + 1);
memset(ibm_db_globals->__python_stmt_err_state, 0, SQL_SQLSTATE_SIZE + 1);
}
static PyObject *persistent_list;
static PyObject *os_getpid;
char *estrdup(char *data) {
int len = strlen(data);
char *dup = ALLOC_N(char, len+1);
if ( dup == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return NULL;
}
strcpy(dup, data);
return dup;
}
char *estrndup(char *data, int max) {
int len = strlen(data);
char *dup;
if (len > max){
len = max;
}
dup = ALLOC_N(char, len+1);
if ( dup == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return NULL;
}
strcpy(dup, data);
return dup;
}
char *strtolower(char *data, int max) {
while (max--){
data[max] = tolower(data[max]);
}
return data;
}
char *strtoupper(char *data, int max) {
while (max--){
data[max] = toupper(data[max]);
}
return data;
}
/* static void _python_ibm_db_free_conn_struct */
static void _python_ibm_db_free_conn_struct(conn_handle *handle) {
/* Disconnect from DB. If stmt is allocated, it is freed automatically */
if ( handle->handle_active && !handle->flag_pconnect) {
if(handle->auto_commit == 0){
Py_BEGIN_ALLOW_THREADS;
SQLEndTran(SQL_HANDLE_DBC, (SQLHDBC)handle->hdbc, SQL_ROLLBACK);
Py_END_ALLOW_THREADS;
}
Py_BEGIN_ALLOW_THREADS;
SQLDisconnect((SQLHDBC)handle->hdbc);
SQLFreeHandle(SQL_HANDLE_DBC, handle->hdbc);
SQLFreeHandle(SQL_HANDLE_ENV, handle->henv);
Py_END_ALLOW_THREADS;
}
Py_TYPE(handle)->tp_free((PyObject*)handle);
}
/* static void _python_ibm_db_free_row_struct */
/*
* static void _python_ibm_db_free_row_struct(row_hash_struct *handle) {
* free(handle);
* }
*/
static void _python_ibm_db_clear_param_cache( stmt_handle *stmt_res )
{
param_node *temp_ptr, *curr_ptr;
/* Free param cache list */
curr_ptr = stmt_res->head_cache_list;
while (curr_ptr != NULL) {
/* Decrement refcount on Python handle */
/* NOTE: Py_XDECREF checks NULL value */
Py_XDECREF(curr_ptr->var_pyvalue);
/* Free Values */
/* NOTE: PyMem_Free checks NULL value */
PyMem_Free(curr_ptr->varname);
PyMem_Free(curr_ptr->svalue);
PyMem_Free(curr_ptr->uvalue);
PyMem_Free(curr_ptr->date_value);
PyMem_Free(curr_ptr->time_value);
PyMem_Free(curr_ptr->ts_value);
PyMem_Free(curr_ptr->ivalueArray);
PyMem_Free(curr_ptr->fvalueArray);
PyMem_Free(curr_ptr->bind_indicator_array);
temp_ptr = curr_ptr;
curr_ptr = curr_ptr->next;
PyMem_Free(temp_ptr);
}
stmt_res->head_cache_list = NULL;
stmt_res->num_params = 0;
}
/* static void _python_ibm_db_free_result_struct(stmt_handle* handle) */
static void _python_ibm_db_free_result_struct(stmt_handle* handle) {
int i;
if ( handle != NULL ) {
_python_ibm_db_clear_param_cache(handle);
/* free row data cache */
if (handle->row_data) {
for (i = 0; i<handle->num_columns; i++) {
switch (handle->column_info[i].type) {
case SQL_CHAR:
case SQL_VARCHAR:
case SQL_LONGVARCHAR:
case SQL_WCHAR:
case SQL_WVARCHAR:
case SQL_GRAPHIC:
case SQL_VARGRAPHIC:
case SQL_LONGVARGRAPHIC:
case SQL_BIGINT:
case SQL_DECIMAL:
case SQL_NUMERIC:
case SQL_XML:
case SQL_DECFLOAT:
if ( handle->row_data[i].data.str_val != NULL ) {
PyMem_Del(handle->row_data[i].data.str_val);
handle->row_data[i].data.str_val = NULL;
}
if ( handle->row_data[i].data.w_val != NULL ) {
PyMem_Del(handle->row_data[i].data.w_val);
handle->row_data[i].data.w_val = NULL;
}
break;
case SQL_TYPE_TIMESTAMP:
if ( handle->row_data[i].data.ts_val != NULL ) {
PyMem_Del(handle->row_data[i].data.ts_val);
handle->row_data[i].data.ts_val = NULL;
}
break;
case SQL_TYPE_DATE:
if ( handle->row_data[i].data.date_val != NULL ) {
PyMem_Del(handle->row_data[i].data.date_val);
handle->row_data[i].data.date_val = NULL;
}
break;
case SQL_TYPE_TIME:
if ( handle->row_data[i].data.time_val != NULL ) {
PyMem_Del(handle->row_data[i].data.time_val);
handle->row_data[i].data.time_val = NULL;
}
break;
}
}
PyMem_Del(handle->row_data);
handle->row_data = NULL;
}
/* free column info cache */
if ( handle->column_info ) {
for (i = 0; i<handle->num_columns; i++) {
PyMem_Del(handle->column_info[i].name);
/* Mem free */
if(handle->column_info[i].mem_alloc){
PyMem_Del(handle->column_info[i].mem_alloc);
}
}
PyMem_Del(handle->column_info);
handle->column_info = NULL;
handle->num_columns = 0;
}
}
}
/* static stmt_handle *_ibm_db_new_stmt_struct(conn_handle* conn_res) */
static stmt_handle *_ibm_db_new_stmt_struct(conn_handle* conn_res) {
stmt_handle *stmt_res;
stmt_res = PyObject_NEW(stmt_handle, &stmt_handleType);
/* memset(stmt_res, 0, sizeof(stmt_handle)); */
/* Initialize stmt resource so parsing assigns updated options if needed */
stmt_res->hdbc = conn_res->hdbc;
stmt_res->s_bin_mode = conn_res->c_bin_mode;
stmt_res->cursor_type = conn_res->c_cursor_type;
stmt_res->s_case_mode = conn_res->c_case_mode;
stmt_res->s_use_wchar = conn_res->c_use_wchar;
stmt_res->head_cache_list = NULL;
stmt_res->current_node = NULL;
stmt_res->num_params = 0;
stmt_res->file_param = 0;
stmt_res->column_info = NULL;
stmt_res->num_columns = 0;
stmt_res->error_recno_tracker = 1;
stmt_res->errormsg_recno_tracker = 1;
stmt_res->row_data = NULL;
return stmt_res;
}
/* static _python_ibm_db_free_stmt_struct */
static void _python_ibm_db_free_stmt_struct(stmt_handle *handle) {
if ( handle->hstmt != -1 ) {
Py_BEGIN_ALLOW_THREADS;
SQLFreeHandle( SQL_HANDLE_STMT, handle->hstmt);
Py_END_ALLOW_THREADS;
if ( handle ) {
_python_ibm_db_free_result_struct(handle);
}
}
Py_TYPE(handle)->tp_free((PyObject*)handle);
}
/* static void _python_ibm_db_init_error_info(stmt_handle *stmt_res) */
static void _python_ibm_db_init_error_info(stmt_handle *stmt_res) {
stmt_res->error_recno_tracker = 1;
stmt_res->errormsg_recno_tracker = 1;
}
/* static void _python_ibm_db_check_sql_errors( SQLHANDLE handle, SQLSMALLINT hType, int rc, int cpy_to_global, char* ret_str, int API SQLSMALLINT recno)
*/
static void _python_ibm_db_check_sql_errors( SQLHANDLE handle, SQLSMALLINT hType, int rc, int cpy_to_global, char* ret_str, int API, SQLSMALLINT recno )
{
SQLCHAR msg[SQL_MAX_MESSAGE_LENGTH + 1] = {0};
SQLCHAR sqlstate[SQL_SQLSTATE_SIZE + 1] = {0};
SQLCHAR errMsg[DB2_MAX_ERR_MSG_LEN] = {0};
SQLINTEGER sqlcode = 0;
SQLSMALLINT length = 0;
char *p= NULL;
SQLINTEGER rc1 = SQL_SUCCESS;
int i = 0;
memset(errMsg, '\0', DB2_MAX_ERR_MSG_LEN);
memset(msg, '\0', SQL_MAX_MESSAGE_LENGTH + 1);
rc1 = SQLGetDiagRec( hType, handle, recno, sqlstate, &sqlcode, msg,
SQL_MAX_MESSAGE_LENGTH + 1, &length );
if ( rc1 == SQL_SUCCESS )
{
while ((p = strchr( (char *)msg, '\n' ))) {
*p = '\0';
}
sprintf((char*)errMsg, "%s SQLCODE=%d", (char*)msg, (int)sqlcode);
#ifdef _WIN32
for(i = 0; i < strlen(errMsg); i++)
{
if(errMsg[i] == '\r')
{
errMsg[i] = ' ';
}
}
#endif
if (cpy_to_global != 0 && rc != 1 ) {
PyErr_SetString(PyExc_Exception, (char *) errMsg);
}
switch (rc) {
case SQL_ERROR:
/* Need to copy the error msg and sqlstate into the symbol Table
* to cache these results */
if ( cpy_to_global ) {
switch (hType) {
case SQL_HANDLE_DBC:
strncpy( IBM_DB_G(__python_conn_err_state),
(char*)sqlstate, SQL_SQLSTATE_SIZE+1);
strncpy( IBM_DB_G(__python_conn_err_msg),
(char*)errMsg, DB2_MAX_ERR_MSG_LEN);
break;
case SQL_HANDLE_STMT:
strncpy( IBM_DB_G(__python_stmt_err_state),
(char*)sqlstate, SQL_SQLSTATE_SIZE+1);
strncpy( IBM_DB_G(__python_stmt_err_msg),
(char*)errMsg, DB2_MAX_ERR_MSG_LEN);
break;
}
}
/* This call was made from ibm_db_errmsg or ibm_db_error or ibm_db_warn */
/* Check for error and return */
switch (API) {
case DB2_ERR:
if ( ret_str != NULL ) {
strncpy(ret_str, (char*)sqlstate, SQL_SQLSTATE_SIZE+1);
}
return;
case DB2_ERRMSG:
if ( ret_str != NULL ) {
strncpy(ret_str, (char*)errMsg, DB2_MAX_ERR_MSG_LEN);
}
return;
default:
break;
}
break;
case SQL_SUCCESS_WITH_INFO:
/* Need to copy the warning msg and sqlstate into the symbol Table
* to cache these results */
if ( cpy_to_global ) {
switch ( hType ) {
case SQL_HANDLE_DBC:
strncpy(IBM_DB_G(__python_conn_warn_state),
(char*)sqlstate, SQL_SQLSTATE_SIZE+1);
strncpy(IBM_DB_G(__python_conn_warn_msg),
(char*)errMsg, DB2_MAX_ERR_MSG_LEN);
break;
case SQL_HANDLE_STMT:
strncpy(IBM_DB_G(__python_stmt_warn_state),
(char*)sqlstate, SQL_SQLSTATE_SIZE+1);
strncpy(IBM_DB_G(__python_stmt_warn_msg),
(char*)errMsg, DB2_MAX_ERR_MSG_LEN);
break;
}
}
/* This call was made from ibm_db_errmsg or ibm_db_error or ibm_db_warn */
/* Check for error and return */
if ( (API == DB2_WARNMSG) && (ret_str != NULL) ) {
strncpy(ret_str, (char*)errMsg, DB2_MAX_ERR_MSG_LEN);
}
return;
default:
break;
}
}
}
/* static int _python_ibm_db_assign_options( void *handle, int type, long opt_key, PyObject *data ) */
static int _python_ibm_db_assign_options( void *handle, int type, long opt_key, PyObject *data )
{
int rc = 0;
long option_num = 0;
SQLINTEGER value_int = 0;
#ifdef __MVS__
SQLCHAR *option_str = NULL;
#else
SQLWCHAR *option_str = NULL;
#endif
int isNewBuffer;
/* First check to see if it is a non-cli attribut */
if (opt_key == ATTR_CASE) {
option_num = NUM2LONG(data);
if (type == SQL_HANDLE_STMT) {
switch (option_num) {
case CASE_LOWER:
((stmt_handle*)handle)->s_case_mode = CASE_LOWER;
break;
case CASE_UPPER:
((stmt_handle*)handle)->s_case_mode = CASE_UPPER;
break;
case CASE_NATURAL:
((stmt_handle*)handle)->s_case_mode = CASE_NATURAL;
break;
default:
PyErr_SetString(PyExc_Exception, "ATTR_CASE attribute must be one of CASE_LOWER, CASE_UPPER, or CASE_NATURAL");
return -1;
}
} else if (type == SQL_HANDLE_DBC) {
switch (option_num) {
case CASE_LOWER:
((conn_handle*)handle)->c_case_mode = CASE_LOWER;
break;
case CASE_UPPER:
((conn_handle*)handle)->c_case_mode = CASE_UPPER;
break;
case CASE_NATURAL:
((conn_handle*)handle)->c_case_mode = CASE_NATURAL;
break;
default:
PyErr_SetString(PyExc_Exception, "ATTR_CASE attribute must be one of CASE_LOWER, CASE_UPPER, or CASE_NATURAL");
return -1;
}
} else {
PyErr_SetString(PyExc_Exception, "Connection or statement handle must be passed in.");
return -1;
}
} else if (opt_key == USE_WCHAR) {
option_num = NUM2LONG(data);
if (type == SQL_HANDLE_STMT) {
switch (option_num) {
case WCHAR_YES:
((stmt_handle*)handle)->s_use_wchar = WCHAR_YES;
break;
case WCHAR_NO:
((stmt_handle*)handle)->s_use_wchar = WCHAR_NO;
break;
default:
PyErr_SetString(PyExc_Exception, "USE_WCHAR attribute must be one of WCHAR_YES or WCHAR_NO");
return -1;
}
}
else if (type == SQL_HANDLE_DBC) {
switch (option_num) {
case WCHAR_YES:
((conn_handle*)handle)->c_use_wchar = WCHAR_YES;
break;
case WCHAR_NO:
((conn_handle*)handle)->c_use_wchar = WCHAR_NO;
break;
default:
PyErr_SetString(PyExc_Exception, "USE_WCHAR attribute must be one of WCHAR_YES or WCHAR_NO");
return -1;
}
}
} else if (type == SQL_HANDLE_STMT) {
if (PyString_Check(data)|| PyUnicode_Check(data)) {
data = PyUnicode_FromObject(data);
#ifdef __MVS__
option_str = getUnicodeDataAsSQLCHAR(data, &isNewBuffer);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetStmtAttr((SQLHSTMT)((stmt_handle *)handle)->hstmt, opt_key, (SQLPOINTER)option_str, SQL_IS_INTEGER );
Py_END_ALLOW_THREADS;
#else
option_str = getUnicodeDataAsSQLWCHAR(data, &isNewBuffer);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetStmtAttrW((SQLHSTMT)((stmt_handle *)handle)->hstmt, opt_key, (SQLPOINTER)option_str, SQL_IS_INTEGER );
Py_END_ALLOW_THREADS;
#endif
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)((stmt_handle *)handle)->hstmt, SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
if (isNewBuffer)
PyMem_Del(option_str);
} else {
option_num = NUM2LONG(data);
if (opt_key == SQL_ATTR_AUTOCOMMIT && option_num == SQL_AUTOCOMMIT_OFF) ((conn_handle*)handle)->auto_commit = 0;
else if (opt_key == SQL_ATTR_AUTOCOMMIT && option_num == SQL_AUTOCOMMIT_ON) ((conn_handle*)handle)->auto_commit = 1;
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetStmtAttr((SQLHSTMT)((stmt_handle *)handle)->hstmt, opt_key, (SQLPOINTER)option_num, SQL_IS_INTEGER );
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)((stmt_handle *)handle)->hstmt, SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
if (opt_key == SQL_ATTR_CURSOR_TYPE){
((stmt_handle *)handle)->cursor_type = option_num;
if ( rc == SQL_SUCCESS_WITH_INFO ) {
Py_BEGIN_ALLOW_THREADS;
rc = SQLGetStmtAttr( ((stmt_handle *)handle)->hstmt, opt_key, &value_int, SQL_IS_INTEGER, NULL);
Py_END_ALLOW_THREADS;
if (rc == SQL_ERROR) {
_python_ibm_db_check_sql_errors(((stmt_handle *)handle)->hstmt, SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
PyErr_Clear();
return -1;
}
((stmt_handle *)handle)->cursor_type = value_int;
}
}
}
} else if (type == SQL_HANDLE_DBC) {
if (PyString_Check(data)|| PyUnicode_Check(data)) {
data = PyUnicode_FromObject(data);
#ifdef __MVS__
option_str = getUnicodeDataAsSQLCHAR(data, &isNewBuffer);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetConnectAttr((SQLHSTMT)((conn_handle*)handle)->hdbc, opt_key, (SQLPOINTER)option_str, SQL_NTS);
Py_END_ALLOW_THREADS;
#else
option_str = getUnicodeDataAsSQLWCHAR(data, &isNewBuffer);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetConnectAttrW((SQLHSTMT)((conn_handle*)handle)->hdbc, opt_key, (SQLPOINTER)option_str, SQL_NTS);
Py_END_ALLOW_THREADS;
#endif
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)((stmt_handle *)handle)->hstmt, SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
if (isNewBuffer)
PyMem_Del(option_str);
} else {
option_num = NUM2LONG(data);
if (opt_key == SQL_ATTR_AUTOCOMMIT && option_num == SQL_AUTOCOMMIT_OFF) ((conn_handle*)handle)->auto_commit = 0;
else if (opt_key == SQL_ATTR_AUTOCOMMIT && option_num == SQL_AUTOCOMMIT_ON) ((conn_handle*)handle)->auto_commit = 1;
#ifdef __MVS__
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetConnectAttr((SQLHSTMT)((conn_handle*)handle)->hdbc, opt_key, (SQLPOINTER)option_num, SQL_IS_INTEGER);
Py_END_ALLOW_THREADS;
#else
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetConnectAttrW((SQLHSTMT)((conn_handle*)handle)->hdbc, opt_key, (SQLPOINTER)option_num, SQL_IS_INTEGER);
Py_END_ALLOW_THREADS;
#endif
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)((stmt_handle *)handle)->hstmt, SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
}
} else {
PyErr_SetString(PyExc_Exception, "Connection or statement handle must be passed in.");
return -1;
}
return 0;
}
/* static int _python_ibm_db_parse_options( PyObject *options, int type, void *handle)
*/
static int _python_ibm_db_parse_options ( PyObject *options, int type, void *handle )
{
int numOpts = 0, i = 0;
PyObject *keys = NULL;
PyObject *key = NULL; /* Holds the Option Index Key */
PyObject *data = NULL;
PyObject *tc_pass = NULL;
int rc = 0;
if ( !NIL_P(options) ) {
keys = PyDict_Keys(options);
numOpts = PyList_Size(keys);
for ( i = 0; i < numOpts; i++) {
key = PyList_GetItem(keys, i);
data = PyDict_GetItem(options, key);
if(NUM2LONG(key) == SQL_ATTR_TRUSTED_CONTEXT_PASSWORD) {
tc_pass = data;
} else {
/* Assign options to handle. */
/* Sets the options in the handle with CLI/ODBC calls */
rc = _python_ibm_db_assign_options(handle, type, NUM2LONG(key), data);
}
if (rc)
return SQL_ERROR;
}
if (!NIL_P(tc_pass) ) {
rc = _python_ibm_db_assign_options(handle, type, SQL_ATTR_TRUSTED_CONTEXT_PASSWORD, tc_pass);
}
if (rc)
return SQL_ERROR;
}
return SQL_SUCCESS;
}
/* static int _python_ibm_db_get_result_set_info(stmt_handle *stmt_res)
initialize the result set information of each column. This must be done once
*/
static int _python_ibm_db_get_result_set_info(stmt_handle *stmt_res)
{
int rc = -1, i;
SQLSMALLINT nResultCols = 0, name_length;
SQLCHAR tmp_name[BUFSIZ];
Py_BEGIN_ALLOW_THREADS;
rc = SQLNumResultCols((SQLHSTMT)stmt_res->hstmt, &nResultCols);
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR || nResultCols == 0) {
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
return -1;
}
/* if( rc == SQL_SUCCESS_WITH_INFO )
{
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
} */
stmt_res->num_columns = nResultCols;
stmt_res->column_info = ALLOC_N(ibm_db_result_set_info, nResultCols);
if ( stmt_res->column_info == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
memset(stmt_res->column_info, 0, sizeof(ibm_db_result_set_info)*nResultCols);
/* return a set of attributes for a column */
for (i = 0 ; i < nResultCols; i++) {
Py_BEGIN_ALLOW_THREADS;
rc = SQLDescribeCol((SQLHSTMT)stmt_res->hstmt, (SQLSMALLINT)(i + 1 ),
(SQLCHAR *)&tmp_name, BUFSIZ, &name_length,
&stmt_res->column_info[i].type,
&stmt_res->column_info[i].size,
&stmt_res->column_info[i].scale,
&stmt_res->column_info[i].nullable);
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR || rc == SQL_SUCCESS_WITH_INFO ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
if ( rc == SQL_ERROR )
{
return -1;
}
if ( name_length <= 0 ) {
stmt_res->column_info[i].name = (SQLCHAR *)estrdup("");
if ( stmt_res->column_info[i].name == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
} else if (name_length >= BUFSIZ ) {
/* column name is longer than BUFSIZ */
stmt_res->column_info[i].name = (SQLCHAR*)ALLOC_N(char, name_length+1);
if ( stmt_res->column_info[i].name == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
Py_BEGIN_ALLOW_THREADS;
rc = SQLDescribeCol((SQLHSTMT)stmt_res->hstmt, (SQLSMALLINT)(i + 1),
stmt_res->column_info[i].name, name_length,
&name_length, &stmt_res->column_info[i].type,
&stmt_res->column_info[i].size,
&stmt_res->column_info[i].scale,
&stmt_res->column_info[i].nullable);
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR || rc == SQL_SUCCESS_WITH_INFO ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL, -1, 1);
}
if ( rc == SQL_ERROR )
{
return -1;
}
} else {
stmt_res->column_info[i].name = (SQLCHAR*)estrdup((char*)tmp_name);
if ( stmt_res->column_info[i].name == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
}
}
return 0;
}
/* static int _python_ibn_bind_column_helper(stmt_handle *stmt_res)
bind columns to data, this must be done once
*/
static int _python_ibm_db_bind_column_helper(stmt_handle *stmt_res)
{
SQLINTEGER in_length = 0;
SQLSMALLINT column_type;
ibm_db_row_data_type *row_data;
int i, rc = SQL_SUCCESS;
stmt_res->row_data = ALLOC_N(ibm_db_row_type, stmt_res->num_columns);
if ( stmt_res->row_data == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
memset(stmt_res->row_data, 0, sizeof(ibm_db_row_type)*stmt_res->num_columns);
for (i = 0; i<stmt_res->num_columns; i++) {
column_type = stmt_res->column_info[i].type;
row_data = &stmt_res->row_data[i].data;
switch(column_type) {
case SQL_CHAR:
case SQL_VARCHAR:
case SQL_LONGVARCHAR:
if ( stmt_res->s_use_wchar == WCHAR_NO ) {
in_length = stmt_res->column_info[i].size+1;
row_data->str_val = (SQLCHAR *)ALLOC_N(char, in_length);
if ( row_data->str_val == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
Py_BEGIN_ALLOW_THREADS;
rc = SQLBindCol((SQLHSTMT)stmt_res->hstmt, (SQLUSMALLINT)(i+1),
SQL_C_CHAR, row_data->str_val, in_length,
(SQLINTEGER *)(&stmt_res->row_data[i].out_length));
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL,
-1, 1);
}
break;
}
case SQL_WCHAR:
case SQL_WVARCHAR:
case SQL_GRAPHIC:
case SQL_VARGRAPHIC:
case SQL_LONGVARGRAPHIC:
in_length = stmt_res->column_info[i].size+1;
row_data->w_val = (SQLWCHAR *) ALLOC_N(SQLWCHAR, in_length);
Py_BEGIN_ALLOW_THREADS;
rc = SQLBindCol((SQLHSTMT)stmt_res->hstmt, (SQLUSMALLINT)(i+1),
SQL_C_WCHAR, row_data->w_val, in_length * sizeof(SQLWCHAR),
(SQLINTEGER *)(&stmt_res->row_data[i].out_length));
Py_END_ALLOW_THREADS;
if ( rc == SQL_ERROR ) {
_python_ibm_db_check_sql_errors((SQLHSTMT)stmt_res->hstmt,
SQL_HANDLE_STMT, rc, 1, NULL,
-1, 1);
}
break;
case SQL_BINARY:
case SQL_LONGVARBINARY:
case SQL_VARBINARY:
if ( stmt_res->s_bin_mode == CONVERT ) {
in_length = 2*(stmt_res->column_info[i].size)+1;
row_data->str_val = (SQLCHAR *)ALLOC_N(char, in_length);
if ( row_data->str_val == NULL ) {
PyErr_SetString(PyExc_Exception, "Failed to Allocate Memory");
return -1;
}
Py_BEGIN_ALLOW_THREADS;
rc = SQLBindCol((SQLHSTMT)stmt_res->hstmt, (SQLUSMALLINT)(i+1),