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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 "3.2.6"
#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
// Define macros for log levels
#define DEBUG "DEBUG"
#define INFO "INFO"
#define WARNING "WARNING"
#define ERROR "ERROR"
#define EXCEPTION "EXCEPTION"
static int debug_mode = 0;
static char *fileName = NULL;
static char messageStr[2024];
// LogMsg function
static void LogMsg(const char *log_level, const char *message)
{
// logging if in debug mode
if (debug_mode)
{
// Print formatted log message
if (fileName == NULL)
{
printf("[%s] - %s\n", log_level, message);
}
else
{
FILE *file = fopen(fileName, "a");
if (file != NULL)
{
fprintf(file, "[%s] - %s\n", log_level, message);
fclose(file);
}
else
{
printf("Failed to open log file: %s\n", fileName);
}
}
}
}
static void LogUTF8Msg(PyObject *args)
{
if(debug_mode)
{
PyObject *argsStr = PyObject_Repr(args);
snprintf(messageStr, sizeof(messageStr), "Received arguments: %s", PyUnicode_AsUTF8(argsStr));
LogMsg(INFO, messageStr);
Py_XDECREF(argsStr);
}
}
/* 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);
memset(ibm_db_globals->__python_err_code, 0, SQL_SQLCODE_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)
{
LogMsg(INFO, "entry _python_ibm_db_free_conn_struct");
/* Disconnect from DB. If stmt is allocated, it is freed automatically */
snprintf(messageStr, sizeof(messageStr), "Handle details: handle_active=%d, flag_pconnect=%d, auto_commit=%d",
handle->handle_active, handle->flag_pconnect, handle->auto_commit);
LogMsg(DEBUG, messageStr);
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;
snprintf(messageStr, sizeof(messageStr), "SQLEndTran called with SQL_HANDLE_DBC=%d, hdbc=%p, SQL_ROLLBACK=%d",
SQL_HANDLE_DBC, (void *)handle->hdbc, SQL_ROLLBACK);
LogMsg(DEBUG, messageStr);
}
Py_BEGIN_ALLOW_THREADS;
SQLDisconnect((SQLHDBC)handle->hdbc);
snprintf(messageStr, sizeof(messageStr), "SQLDisconnect called with hdbc=%p", (void *)handle->hdbc);
LogMsg(DEBUG, messageStr);
SQLFreeHandle(SQL_HANDLE_DBC, handle->hdbc);
snprintf(messageStr, sizeof(messageStr), "SQLFreeHandle called with SQL_HANDLE_DBC=%d, handle_hdbc=%p", SQL_HANDLE_DBC, (void *)handle->hdbc);
LogMsg(DEBUG, messageStr);
SQLFreeHandle(SQL_HANDLE_ENV, handle->henv);
snprintf(messageStr, sizeof(messageStr), "SQLFreeHandle called with SQL_HANDLE_ENV=%d, handle->henv=%p", SQL_HANDLE_ENV, (void *)handle->henv);
LogMsg(DEBUG, messageStr);
Py_END_ALLOW_THREADS;
}
else
{
snprintf(messageStr, sizeof(messageStr), "Connection not active or is a persistent connection. No disconnect needed.");
LogMsg(INFO, messageStr);
}
LogMsg(INFO, "exit _python_ibm_db_free_conn_struct");
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)
{
LogMsg(INFO, "entry _python_ibm_db_clear_param_cache()");
snprintf(messageStr, sizeof(messageStr), "Initial state: head_cache_list=%p, num_params=%d",
stmt_res->head_cache_list, stmt_res->num_params);
LogMsg(DEBUG, messageStr);
param_node *temp_ptr, *curr_ptr;
/* Free param cache list */
curr_ptr = stmt_res->head_cache_list;
while (curr_ptr != NULL)
{
snprintf(messageStr, sizeof(messageStr), "Freeing node: var_pyvalue=%p, varname=%p, svalue=%p, uvalue=%p, date_value=%p, time_value=%p, ts_value=%p, ivalueArray=%p, fvalueArray=%p, bind_indicator_array=%p",
curr_ptr->var_pyvalue, curr_ptr->varname, curr_ptr->svalue, curr_ptr->uvalue,
curr_ptr->date_value, curr_ptr->time_value, curr_ptr->ts_value,
curr_ptr->ivalueArray, curr_ptr->fvalueArray, curr_ptr->bind_indicator_array);
LogMsg(DEBUG, messageStr);
/* 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;
snprintf(messageStr, sizeof(messageStr), "Final state: head_cache_list=%p, num_params=%d",
stmt_res->head_cache_list, stmt_res->num_params);
LogMsg(DEBUG, messageStr);
LogMsg(INFO, "exit _python_ibm_db_clear_param_cache()");
}
/* static void _python_ibm_db_free_result_struct(stmt_handle* handle) */
static void _python_ibm_db_free_result_struct(stmt_handle *handle)
{
LogMsg(INFO, "entry _python_ibm_db_free_result_struct()");
int i;
if (handle != NULL)
{
snprintf(messageStr, sizeof(messageStr), "handle=%p, num_columns=%d", (void *)handle, handle->num_columns);
LogMsg(DEBUG, messageStr);
_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)
{
snprintf(messageStr, sizeof(messageStr), "Freeing row_data[%d].data.str_val=%p", i, handle->row_data[i].data.str_val);
LogMsg(DEBUG, messageStr);
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)
{
snprintf(messageStr, sizeof(messageStr), "Freeing row_data[%d].data.w_val=%p", i, handle->row_data[i].data.w_val);
LogMsg(DEBUG, messageStr);
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)
{
snprintf(messageStr, sizeof(messageStr), "Freeing row_data[%d].data.ts_val=%p", i, handle->row_data[i].data.ts_val);
LogMsg(DEBUG, messageStr);
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)
{
snprintf(messageStr, sizeof(messageStr), "Freeing row_data[%d].data.date_val=%p", i, handle->row_data[i].data.date_val);
LogMsg(DEBUG, messageStr);
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)
{
snprintf(messageStr, sizeof(messageStr), "Freeing row_data[%d].data.time_val=%p", i, handle->row_data[i].data.time_val);
LogMsg(DEBUG, messageStr);
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++)
{
snprintf(messageStr, sizeof(messageStr), "Freeing column_info[%d].name=%p", i, handle->column_info[i].name);
LogMsg(DEBUG, messageStr);
PyMem_Del(handle->column_info[i].name);
/* Mem free */
if (handle->column_info[i].mem_alloc)
{
snprintf(messageStr, sizeof(messageStr), "Freeing column_info[%d].mem_alloc=%p", i, handle->column_info[i].mem_alloc);
LogMsg(DEBUG, messageStr);
PyMem_Del(handle->column_info[i].mem_alloc);
}
}
PyMem_Del(handle->column_info);
handle->column_info = NULL;
handle->num_columns = 0;
}
}
LogMsg(INFO, "exit _python_ibm_db_free_result_struct()");
}
/* static stmt_handle *_ibm_db_new_stmt_struct(conn_handle* conn_res) */
static stmt_handle *_ibm_db_new_stmt_struct(conn_handle *conn_res)
{
LogMsg(INFO, "entry _ibm_db_new_stmt_struct()");
snprintf(messageStr, sizeof(messageStr), "Initializing stmt_handle: hdbc=%p, c_bin_mode=%d, c_cursor_type=%d, c_case_mode=%d, c_use_wchar=%d",
conn_res->hdbc, conn_res->c_bin_mode, conn_res->c_cursor_type, conn_res->c_case_mode, conn_res->c_use_wchar);
LogMsg(DEBUG, messageStr);
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;
snprintf(messageStr, sizeof(messageStr), "New stmt_handle initialized: hdbc=%p, s_bin_mode=%d, cursor_type=%d, s_case_mode=%d, s_use_wchar=%d",
stmt_res->hdbc, stmt_res->s_bin_mode, stmt_res->cursor_type, stmt_res->s_case_mode, stmt_res->s_use_wchar);
LogMsg(DEBUG, messageStr);
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;
snprintf(messageStr, sizeof(messageStr), "Final stmt_handle state: head_cache_list=%p, current_node=%p, num_params=%d, file_param=%d, column_info=%p, num_columns=%d, error_recno_tracker=%d, errormsg_recno_tracker=%d, row_data=%p",
stmt_res->head_cache_list, stmt_res->current_node, stmt_res->num_params, stmt_res->file_param, stmt_res->column_info, stmt_res->num_columns, stmt_res->error_recno_tracker, stmt_res->errormsg_recno_tracker, stmt_res->row_data);
LogMsg(DEBUG, messageStr);
LogMsg(INFO, "exit _ibm_db_new_stmt_struct()");
return stmt_res;
}
/* static _python_ibm_db_free_stmt_struct */
static void _python_ibm_db_free_stmt_struct(stmt_handle *handle)
{
LogMsg(INFO, "entry _python_ibm_db_free_stmt_struct()");
if (handle != NULL && handle->hstmt != -1)
{
snprintf(messageStr, sizeof(messageStr), "handle->hstmt=%p, preparing to call SQLFreeHandle", (void *)handle->hstmt);
LogMsg(DEBUG, messageStr);
Py_BEGIN_ALLOW_THREADS;
SQLFreeHandle(SQL_HANDLE_STMT, handle->hstmt);
Py_END_ALLOW_THREADS;
snprintf(messageStr, sizeof(messageStr), "SQLFreeHandle called with handle=%p", (void *)handle->hstmt);
LogMsg(DEBUG, messageStr);
if (handle != NULL)
{
_python_ibm_db_free_result_struct(handle);
}
}
snprintf(messageStr, sizeof(messageStr), "Py_TYPE(handle)->tp_free called for handle=%p", (void *)handle);
LogMsg(DEBUG, messageStr);
if (handle != NULL)
{
Py_TYPE(handle)->tp_free((PyObject *)handle);
}
LogMsg(INFO, "exit _python_ibm_db_free_stmt_struct()");
}
/* static void _python_ibm_db_init_error_info(stmt_handle *stmt_res) */
static void _python_ibm_db_init_error_info(stmt_handle *stmt_res)
{
LogMsg(INFO, "entry _python_ibm_db_init_error_info()");
snprintf(messageStr, sizeof(messageStr), "Initial state: error_recno_tracker = %d, errormsg_recno_tracker = %d",
stmt_res->error_recno_tracker, stmt_res->errormsg_recno_tracker);
LogMsg(DEBUG, messageStr);
stmt_res->error_recno_tracker = 1;
stmt_res->errormsg_recno_tracker = 1;
snprintf(messageStr, sizeof(messageStr), "Modified state: error_recno_tracker = %d, errormsg_recno_tracker = %d",
stmt_res->error_recno_tracker, stmt_res->errormsg_recno_tracker);
LogMsg(DEBUG, messageStr);
LogMsg(INFO, "exit _python_ibm_db_init_error_info()");
}
/* 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)
{
LogMsg(INFO, "entry _python_ibm_db_check_sql_errors");
SQLCHAR msg[SQL_MAX_MESSAGE_LENGTH + 1] = {0};
SQLCHAR sqlstate[SQL_SQLSTATE_SIZE + 1] = {0};
SQLCHAR errMsg[DB2_MAX_ERR_MSG_LEN] = {0};
SQLCHAR errcode[SQL_SQLCODE_SIZE + 1] = {0};
SQLINTEGER sqlcode = 0;
SQLSMALLINT length = 0;
char *p = NULL;
SQLINTEGER rc1 = SQL_SUCCESS;
int i = 0;
snprintf(messageStr, sizeof(messageStr), "handle=%p, hType=%d, rc=%d, cpy_to_global=%d, API=%d, recno=%d",
handle, hType, rc, cpy_to_global, API, recno);
LogMsg(DEBUG, messageStr);
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);
snprintf(messageStr, sizeof(messageStr), "SQLGetDiagRec returned rc1=%d, sqlstate=%s, sqlcode=%d, msg=%s, length=%d",
rc1, sqlstate, sqlcode, msg, length);
sprintf((char *)errcode, "SQLCODE=%d", (int)sqlcode);
LogMsg(DEBUG, messageStr);
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
LogMsg(ERROR, errMsg);
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:
snprintf(messageStr, sizeof(messageStr),
"Copying to global: SQL_HANDLE_DBC, sqlstate=%s, errMsg=%s",
sqlstate, errMsg);
LogMsg(DEBUG, messageStr);
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);
strncpy(IBM_DB_G(__python_err_code),
(char *)errcode, SQL_SQLCODE_SIZE);
break;
case SQL_HANDLE_STMT:
snprintf(messageStr, sizeof(messageStr),
"Copying to global: SQL_HANDLE_STMT, sqlstate=%s, errMsg=%s",
sqlstate, errMsg);
LogMsg(DEBUG, messageStr);
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);
strncpy(IBM_DB_G(__python_err_code),
(char *)errcode, SQL_SQLCODE_SIZE);
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)
{
snprintf(messageStr, sizeof(messageStr), "Returning SQLSTATE for DB2_ERR: %s", sqlstate);
LogMsg(DEBUG, messageStr);
strncpy(ret_str, (char *)sqlstate, SQL_SQLSTATE_SIZE + 1);
}
return;
case DB2_ERRMSG:
if (ret_str != NULL)
{
snprintf(messageStr, sizeof(messageStr), "Returning error message for DB2_ERRMSG: %s", errMsg);
LogMsg(DEBUG, messageStr);
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:
snprintf(messageStr, sizeof(messageStr),
"Copying warning to global: SQL_HANDLE_DBC, sqlstate=%s, errMsg=%s",
sqlstate, errMsg);
LogMsg(DEBUG, messageStr);
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:
snprintf(messageStr, sizeof(messageStr),
"Copying warning to global: SQL_HANDLE_STMT, sqlstate=%s, errMsg=%s",
sqlstate, errMsg);
LogMsg(DEBUG, messageStr);
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))
{
snprintf(messageStr, sizeof(messageStr), "Returning warning message for DB2_WARNMSG: %s", errMsg);
LogMsg(DEBUG, messageStr);
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)
{
LogMsg(INFO, "entry _python_ibm_db_assign_options()");
int rc = SQL_SUCCESS;
long option_num = 0;
SQLINTEGER value_int = 0;
#ifdef __MVS__
SQLCHAR *option_str = NULL;
#else
SQLWCHAR *option_str = NULL;
#endif
int isNewBuffer = 0;
snprintf(messageStr, sizeof(messageStr), "Parameters - Handle: %p, type: %d, opt_key: %ld, data: %p", handle, type, opt_key, data);
LogMsg(DEBUG, messageStr);
/* First check to see if it is a non-cli attribut */
if (opt_key == ATTR_CASE)
{
option_num = NUM2LONG(data);
snprintf(messageStr, sizeof(messageStr), "ATTR_CASE option_num: %ld", option_num);
LogMsg(DEBUG, messageStr);
if (type == SQL_HANDLE_STMT)
{
switch (option_num)
{
case CASE_LOWER:
((stmt_handle *)handle)->s_case_mode = CASE_LOWER;
snprintf(messageStr, sizeof(messageStr), "Setting s_case_mode to CASE_LOWER");
LogMsg(DEBUG, messageStr);
break;
case CASE_UPPER:
((stmt_handle *)handle)->s_case_mode = CASE_UPPER;
snprintf(messageStr, sizeof(messageStr), "Setting s_case_mode to CASE_UPPER");
LogMsg(DEBUG, messageStr);
break;
case CASE_NATURAL:
((stmt_handle *)handle)->s_case_mode = CASE_NATURAL;
snprintf(messageStr, sizeof(messageStr), "Setting s_case_mode to CASE_UPPER");
LogMsg(DEBUG, messageStr);
break;
default:
LogMsg(EXCEPTION, "ATTR_CASE attribute must be one of CASE_LOWER, CASE_UPPER, or CASE_NATURAL");
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;
snprintf(messageStr, sizeof(messageStr), "Setting c_case_mode to CASE_LOWER");
LogMsg(DEBUG, messageStr);
break;
case CASE_UPPER:
((conn_handle *)handle)->c_case_mode = CASE_UPPER;
snprintf(messageStr, sizeof(messageStr), "Setting c_case_mode to CASE_UPPER");
LogMsg(DEBUG, messageStr);
break;
case CASE_NATURAL:
((conn_handle *)handle)->c_case_mode = CASE_NATURAL;
snprintf(messageStr, sizeof(messageStr), "Setting c_case_mode to CASE_NATURAL");
LogMsg(DEBUG, messageStr);
break;
default:
LogMsg(EXCEPTION, "ATTR_CASE attribute must be one of CASE_LOWER, CASE_UPPER, or CASE_NATURAL");
PyErr_SetString(PyExc_Exception, "ATTR_CASE attribute must be one of CASE_LOWER, CASE_UPPER, or CASE_NATURAL");
return -1;
}
}
else
{
LogMsg(ERROR, "Connection or statement handle must be passed in.");
PyErr_SetString(PyExc_Exception, "Connection or statement handle must be passed in.");
return -1;
}
}
else if (opt_key == USE_WCHAR)
{
option_num = NUM2LONG(data);
snprintf(messageStr, sizeof(messageStr), "USE_WCHAR option_num: %ld", option_num);
LogMsg(DEBUG, messageStr);
if (type == SQL_HANDLE_STMT)
{
switch (option_num)
{
case WCHAR_YES:
((stmt_handle *)handle)->s_use_wchar = WCHAR_YES;
snprintf(messageStr, sizeof(messageStr), "Setting s_use_wchar to WCHAR_YES");
LogMsg(DEBUG, messageStr);
break;
case WCHAR_NO:
((stmt_handle *)handle)->s_use_wchar = WCHAR_NO;
snprintf(messageStr, sizeof(messageStr), "Setting s_use_wchar to WCHAR_NO");
LogMsg(DEBUG, messageStr);
break;
default:
LogMsg(EXCEPTION, "USE_WCHAR attribute must be one of WCHAR_YES or WCHAR_NO");
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;
snprintf(messageStr, sizeof(messageStr), "Setting c_use_wchar to WCHAR_YES");
LogMsg(DEBUG, messageStr);
break;
case WCHAR_NO:
((conn_handle *)handle)->c_use_wchar = WCHAR_NO;
snprintf(messageStr, sizeof(messageStr), "Setting c_use_wchar to WCHAR_NO");
LogMsg(DEBUG, messageStr);
break;
default:
LogMsg(EXCEPTION, "USE_WCHAR attribute must be one of WCHAR_YES or WCHAR_NO");
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);
snprintf(messageStr, sizeof(messageStr), "Converted data to Unicode: %p", data);
LogMsg(DEBUG, messageStr);
#ifdef __MVS__
option_str = getUnicodeDataAsSQLCHAR(data, &isNewBuffer);
snprintf(messageStr, sizeof(messageStr), "Option string (SQLCHAR) pointer: %p, isNewBuffer: %d", option_str, isNewBuffer);
LogMsg(DEBUG, messageStr);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetStmtAttr((SQLHSTMT)((stmt_handle *)handle)->hstmt, opt_key, (SQLPOINTER)option_str, SQL_IS_INTEGER);
Py_END_ALLOW_THREADS;
snprintf(messageStr, sizeof(messageStr), "SQLSetStmtAttr called with hstmt: %p, opt_key: %ld, option_str: %p, SQL_IS_INTEGER, and returned rc: %d",
((stmt_handle *)handle)->hstmt, opt_key, option_str, rc);
LogMsg(DEBUG, messageStr);
#else
option_str = getUnicodeDataAsSQLWCHAR(data, &isNewBuffer);
snprintf(messageStr, sizeof(messageStr), "Option string (SQLWCHAR) pointer: %p, isNewBuffer: %d", option_str, isNewBuffer);
LogMsg(DEBUG, messageStr);
Py_BEGIN_ALLOW_THREADS;
rc = SQLSetStmtAttrW((SQLHSTMT)((stmt_handle *)handle)->hstmt, opt_key, (SQLPOINTER)option_str, SQL_IS_INTEGER);
Py_END_ALLOW_THREADS;
snprintf(messageStr, sizeof(messageStr), "SQLSetStmtAttrW called with hstmt: %p, opt_key: %ld, option_str: %p, SQL_IS_INTEGER, and returned rc: %d",
((stmt_handle *)handle)->hstmt, opt_key, option_str, rc);
LogMsg(DEBUG, messageStr);
#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);
}