switch_odbc.c

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/* 
 * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
 *
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 *
 * The Initial Developer of the Original Code is
 * Anthony Minessale II <anthm@freeswitch.org>
 * Portions created by the Initial Developer are Copyright (C)
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * 
 * Anthony Minessale II <anthm@freeswitch.org>
 *
 * switch_odbc.c -- ODBC
 *
 */

#include <switch.h>

#ifdef SWITCH_HAVE_ODBC
#include <sql.h>
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable:4201)
#include <sqlext.h>
#pragma warning(pop)
#else
#include <sqlext.h>
#endif
#include <sqltypes.h>

#if (ODBCVER < 0x0300)
#define SQL_NO_DATA SQL_SUCCESS
#endif

struct switch_odbc_handle {
        char *dsn;
        char *username;
        char *password;
        SQLHENV env;
        SQLHDBC con;
        switch_odbc_state_t state;
        char odbc_driver[256];
        BOOL is_firebird;
        BOOL is_oracle;
        int affected_rows;
        int num_retries;
};
#endif

SWITCH_DECLARE(switch_odbc_handle_t *) switch_odbc_handle_new(const char *dsn, const char *username, const char *password)
{
#ifdef SWITCH_HAVE_ODBC
        switch_odbc_handle_t *new_handle;

        if (!(new_handle = malloc(sizeof(*new_handle)))) {
                goto err;
        }

        memset(new_handle, 0, sizeof(*new_handle));

        if (!(new_handle->dsn = strdup(dsn))) {
                goto err;
        }

        if (username) {
                if (!(new_handle->username = strdup(username))) {
                        goto err;
                }
        }

        if (password) {
                if (!(new_handle->password = strdup(password))) {
                        goto err;
                }
        }

        new_handle->env = SQL_NULL_HANDLE;
        new_handle->state = SWITCH_ODBC_STATE_INIT;
        new_handle->affected_rows = 0;
        new_handle->num_retries = DEFAULT_ODBC_RETRIES;

        return new_handle;

  err:
        if (new_handle) {
                switch_safe_free(new_handle->dsn);
                switch_safe_free(new_handle->username);
                switch_safe_free(new_handle->password);
                switch_safe_free(new_handle);
        }
#endif
        return NULL;
}

SWITCH_DECLARE(void) switch_odbc_set_num_retries(switch_odbc_handle_t *handle, int num_retries)
{
#ifdef SWITCH_HAVE_ODBC
        if (handle) {
                handle->num_retries = num_retries;
        }
#endif
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_handle_disconnect(switch_odbc_handle_t *handle)
{
#ifdef SWITCH_HAVE_ODBC

        int result;

        if (!handle) {
                return SWITCH_ODBC_FAIL;
        }

        if (handle->state == SWITCH_ODBC_STATE_CONNECTED) {
                result = SQLDisconnect(handle->con);
                if (result == SWITCH_ODBC_SUCCESS) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG10, "Disconnected %d from [%s]\n", result, handle->dsn);
                } else {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error Disconnecting [%s]\n", handle->dsn);
                }
        }

        handle->state = SWITCH_ODBC_STATE_DOWN;

        return SWITCH_ODBC_SUCCESS;
#else
        return SWITCH_ODBC_FAIL;
#endif
}


#ifdef SWITCH_HAVE_ODBC
static switch_odbc_status_t init_odbc_handles(switch_odbc_handle_t *handle, switch_bool_t do_reinit)
{
        int result;

        if (!handle) {
                return SWITCH_ODBC_FAIL;
        }

        /* if handle is already initialized, and we're supposed to reinit - free old handle first */
        if (do_reinit == SWITCH_TRUE && handle->env != SQL_NULL_HANDLE) {
                SQLFreeHandle(SQL_HANDLE_DBC, handle->con);
                SQLFreeHandle(SQL_HANDLE_ENV, handle->env);
                handle->env = SQL_NULL_HANDLE;
        }

        if (handle->env == SQL_NULL_HANDLE) {
                result = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &handle->env);

                if ((result != SQL_SUCCESS) && (result != SQL_SUCCESS_WITH_INFO)) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error AllocHandle\n");
                        handle->env = SQL_NULL_HANDLE; /* Reset handle value, just in case */
                        return SWITCH_ODBC_FAIL;
                }

                result = SQLSetEnvAttr(handle->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);

                if ((result != SQL_SUCCESS) && (result != SQL_SUCCESS_WITH_INFO)) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error SetEnv\n");
                        SQLFreeHandle(SQL_HANDLE_ENV, handle->env);
                        handle->env = SQL_NULL_HANDLE; /* Reset handle value after it's freed */
                        return SWITCH_ODBC_FAIL;
                }

                result = SQLAllocHandle(SQL_HANDLE_DBC, handle->env, &handle->con);

                if ((result != SQL_SUCCESS) && (result != SQL_SUCCESS_WITH_INFO)) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error AllocHDB %d\n", result);
                        SQLFreeHandle(SQL_HANDLE_ENV, handle->env);
                        handle->env = SQL_NULL_HANDLE; /* Reset handle value after it's freed */
                        return SWITCH_ODBC_FAIL;
                }
                SQLSetConnectAttr(handle->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
        }

        return SWITCH_ODBC_SUCCESS;
}

static int db_is_up(switch_odbc_handle_t *handle)
{
        int ret = 0;
        SQLHSTMT stmt = NULL;
        SQLLEN m = 0;
        int result;
        switch_event_t *event;
        switch_odbc_status_t recon = 0;
        char *err_str = NULL;
        SQLCHAR sql[255] = "";
        int max_tries = DEFAULT_ODBC_RETRIES;
        int code = 0;
        SQLRETURN rc;
        SQLSMALLINT nresultcols;


        if (handle) {
                max_tries = handle->num_retries;
                if (max_tries < 1)
                        max_tries = DEFAULT_ODBC_RETRIES;
        }

  top:

        if (!handle) {
                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "No DB Handle\n");
                goto done;
        }

        if (handle->is_oracle) {
                strcpy((char *) sql, "select 1 from dual");
        } else if (handle->is_firebird) {
                strcpy((char *) sql, "select first 1 * from RDB$RELATIONS");
        } else {
                strcpy((char *) sql, "select 1");
        }

        if (SQLAllocHandle(SQL_HANDLE_STMT, handle->con, &stmt) != SQL_SUCCESS) {
                code = __LINE__;
                goto error;
        }

        SQLSetStmtAttr(stmt, SQL_ATTR_QUERY_TIMEOUT, (SQLPOINTER)30, 0);

        if (SQLPrepare(stmt, sql, SQL_NTS) != SQL_SUCCESS) {
                code = __LINE__;
                goto error;
        }

        result = SQLExecute(stmt);

        if (result != SQL_SUCCESS && result != SQL_SUCCESS_WITH_INFO) {
                code = __LINE__;
                goto error;
        }

        SQLRowCount(stmt, &m);
        rc = SQLNumResultCols(stmt, &nresultcols);
        if (rc != SQL_SUCCESS) {
                code = __LINE__;
                goto error;
        }
        ret = (int) nresultcols;
        /* determine statement type */
        if (nresultcols <= 0) {
                /* statement is not a select statement */
                code = __LINE__;
                goto error;
        }

        goto done;

  error:
        err_str = switch_odbc_handle_get_error(handle, stmt);

        /* Make sure to free the handle before we try to reconnect */
        if (stmt) {
                SQLFreeHandle(SQL_HANDLE_STMT, stmt);
                stmt = NULL;
        }

        recon = switch_odbc_handle_connect(handle);

        max_tries--;

        if (switch_event_create(&event, SWITCH_EVENT_TRAP) == SWITCH_STATUS_SUCCESS) {
                switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Failure-Message", "The sql server is not responding for DSN %s [%s][%d]",
                                                                switch_str_nil(handle->dsn), switch_str_nil(err_str), code);
                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "The sql server is not responding for DSN %s [%s][%d]\n",
                                                  switch_str_nil(handle->dsn), switch_str_nil(err_str), code);

                if (recon == SWITCH_ODBC_SUCCESS) {
                        switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Additional-Info", "The connection has been re-established");
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "The connection has been re-established\n");
                } else {
                        switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Additional-Info", "The connection could not be re-established");
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "The connection could not be re-established\n");
                }
                if (!max_tries) {
                        switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Additional-Info", "Giving up!");
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Giving up!\n");
                }

                switch_event_fire(&event);
        }

        if (!max_tries) {
                goto done;
        }

        switch_safe_free(err_str);
        switch_yield(1000000);
        goto top;

  done:

        switch_safe_free(err_str);

        if (stmt) {
                SQLFreeHandle(SQL_HANDLE_STMT, stmt);
        }

        return ret;
}
#endif

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_statement_handle_free(switch_odbc_statement_handle_t *stmt)
{
        if (!stmt || !*stmt) {
                return SWITCH_ODBC_FAIL;
        }
#ifdef SWITCH_HAVE_ODBC
        SQLFreeHandle(SQL_HANDLE_STMT, *stmt);
        *stmt = NULL;
        return SWITCH_ODBC_SUCCESS;
#else
        return SWITCH_ODBC_FAIL;
#endif
}


SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_handle_connect(switch_odbc_handle_t *handle)
{
#ifdef SWITCH_HAVE_ODBC
        int result;
        SQLINTEGER err;
        int16_t mlen;
        unsigned char msg[200] = "", stat[10] = "";
        SQLSMALLINT valueLength = 0;
        int i = 0;

        init_odbc_handles(handle, SWITCH_FALSE); /* Init ODBC handles, if they are already initialized, don't do it again */

        if (handle->state == SWITCH_ODBC_STATE_CONNECTED) {
                switch_odbc_handle_disconnect(handle);
                switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG1, "Re-connecting %s\n", handle->dsn);
        }

        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG1, "Connecting %s\n", handle->dsn);

        if (!strstr(handle->dsn, "DRIVER")) {
                result = SQLConnect(handle->con, (SQLCHAR *) handle->dsn, SQL_NTS, (SQLCHAR *) handle->username, SQL_NTS, (SQLCHAR *) handle->password, SQL_NTS);
        } else {
                SQLCHAR outstr[1024] = { 0 };
                SQLSMALLINT outstrlen = 0;
                result =
                        SQLDriverConnect(handle->con, NULL, (SQLCHAR *) handle->dsn, (SQLSMALLINT) strlen(handle->dsn), outstr, sizeof(outstr), &outstrlen,
                                                         SQL_DRIVER_NOPROMPT);
        }

        if ((result != SQL_SUCCESS) && (result != SQL_SUCCESS_WITH_INFO)) {
                char *err_str;
                if ((err_str = switch_odbc_handle_get_error(handle, NULL))) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s\n", err_str);
                        free(err_str);
                } else {
                        SQLGetDiagRec(SQL_HANDLE_DBC, handle->con, 1, stat, &err, msg, sizeof(msg), &mlen);
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error SQLConnect=%d errno=%d [%s]\n", result, (int) err, msg);
                }

                /* Deallocate handles again, more chanses to succeed when reconnecting */
                init_odbc_handles(handle, SWITCH_TRUE); /* Reinit ODBC handles */
                return SWITCH_ODBC_FAIL;
        }

        result = SQLGetInfo(handle->con, SQL_DRIVER_NAME, (SQLCHAR *) handle->odbc_driver, 255, &valueLength);
        if (result == SQL_SUCCESS || result == SQL_SUCCESS_WITH_INFO) {
                for (i = 0; i < valueLength; ++i)
                        handle->odbc_driver[i] = (char) toupper(handle->odbc_driver[i]);
        }

        if (strstr(handle->odbc_driver, "SQORA32.DLL") != 0 || strstr(handle->odbc_driver, "SQORA64.DLL") != 0) {
                handle->is_firebird = FALSE;
                handle->is_oracle = TRUE;
        } else if (strstr(handle->odbc_driver, "FIREBIRD") != 0 || strstr(handle->odbc_driver, "FB32") != 0 || strstr(handle->odbc_driver, "FB64") != 0) {
                handle->is_firebird = TRUE;
                handle->is_oracle = FALSE;
        } else {
                handle->is_firebird = FALSE;
                handle->is_oracle = FALSE;
        }

        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG1, "Connected to [%s]\n", handle->dsn);
        handle->state = SWITCH_ODBC_STATE_CONNECTED;
        return SWITCH_ODBC_SUCCESS;
#else
        return SWITCH_ODBC_FAIL;
#endif
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_handle_exec_string(switch_odbc_handle_t *handle, const char *sql, char *resbuf, size_t len, char **err)
{
#ifdef SWITCH_HAVE_ODBC
        switch_odbc_status_t sstatus = SWITCH_ODBC_FAIL;
        switch_odbc_statement_handle_t stmt = NULL;
        SQLCHAR name[1024];
        SQLLEN m = 0;

        handle->affected_rows = 0;

        if (switch_odbc_handle_exec(handle, sql, &stmt, err) == SWITCH_ODBC_SUCCESS) {
                SQLSMALLINT NameLength, DataType, DecimalDigits, Nullable;
                SQLULEN ColumnSize;
                int result;

                SQLRowCount(stmt, &m);
                handle->affected_rows = (int) m;

                if (m == 0) {
                        goto done;
                }

                result = SQLFetch(stmt);

                if (result != SQL_SUCCESS && result != SQL_SUCCESS_WITH_INFO && result != SQL_NO_DATA) {
                        goto done;
                }

                SQLDescribeCol(stmt, 1, name, sizeof(name), &NameLength, &DataType, &ColumnSize, &DecimalDigits, &Nullable);
                SQLGetData(stmt, 1, SQL_C_CHAR, (SQLCHAR *) resbuf, (SQLLEN) len, NULL);

                sstatus = SWITCH_ODBC_SUCCESS;
        }

        done:

        switch_odbc_statement_handle_free(&stmt);

        return sstatus;
#else
        return SWITCH_ODBC_FAIL;
#endif
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_handle_exec(switch_odbc_handle_t *handle, const char *sql, switch_odbc_statement_handle_t *rstmt,
                                                                                                                         char **err)
{
#ifdef SWITCH_HAVE_ODBC
        SQLHSTMT stmt = NULL;
        int result;
        char *err_str = NULL, *err2 = NULL;
        SQLLEN m = 0;

        handle->affected_rows = 0;

        if (!db_is_up(handle)) {
                goto error;
        }

        if (SQLAllocHandle(SQL_HANDLE_STMT, handle->con, &stmt) != SQL_SUCCESS) {
                err2 = "SQLAllocHandle failed.";
                goto error;
        }

        if (SQLPrepare(stmt, (unsigned char *) sql, SQL_NTS) != SQL_SUCCESS) {
                err2 = "SQLPrepare failed.";
                goto error;
        }

        result = SQLExecute(stmt);

        switch (result) {
        case SQL_SUCCESS:
        case SQL_SUCCESS_WITH_INFO:
        case SQL_NO_DATA:
                break;
        case SQL_ERROR:
                err2 = "SQLExecute returned SQL_ERROR.";
                goto error;
                break;
        case SQL_NEED_DATA:
                err2 = "SQLExecute returned SQL_NEED_DATA.";
                goto error;
                break;
        default:
                err2 = "SQLExecute returned unknown result code.";
                goto error;
        }

        SQLRowCount(stmt, &m);
        handle->affected_rows = (int) m;

        if (rstmt) {
                *rstmt = stmt;
        } else {
                SQLFreeHandle(SQL_HANDLE_STMT, stmt);
        }

        return SWITCH_ODBC_SUCCESS;

  error:


        if (stmt) {
                err_str = switch_odbc_handle_get_error(handle, stmt);
        }

        if (zstr(err_str)) {
                if (err2) {
                        err_str = strdup(err2);
                } else {
                        err_str = strdup((char *)"SQL ERROR!");
                }
        }
        
        if (err_str) {
                if (!switch_stristr("already exists", err_str) && !switch_stristr("duplicate key name", err_str)) {
                        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "ERR: [%s]\n[%s]\n", sql, switch_str_nil(err_str));
                }
                if (err) {
                        *err = err_str;
                } else {
                        free(err_str);
                }
        }

        if (rstmt) {
                *rstmt = stmt;
        } else if (stmt) {
                SQLFreeHandle(SQL_HANDLE_STMT, stmt);
        }
#endif
        return SWITCH_ODBC_FAIL;
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_handle_callback_exec_detailed(const char *file, const char *func, int line,
                                                                                                                                                           switch_odbc_handle_t *handle,
                                                                                                                                                           const char *sql, switch_core_db_callback_func_t callback, void *pdata,
                                                                                                                                                           char **err)
{
#ifdef SWITCH_HAVE_ODBC
        SQLHSTMT stmt = NULL;
        SQLSMALLINT c = 0, x = 0;
        SQLLEN m = 0;
        char *x_err = NULL, *err_str = NULL;
        int result;
        int err_cnt = 0;
        int done = 0;

        handle->affected_rows = 0;

        switch_assert(callback != NULL);

        if (!db_is_up(handle)) {
                x_err = "DB is not up!";
                goto error;
        }

        if (SQLAllocHandle(SQL_HANDLE_STMT, handle->con, &stmt) != SQL_SUCCESS) {
                x_err = "Unable to SQL allocate handle!";
                goto error;
        }

        if (SQLPrepare(stmt, (unsigned char *) sql, SQL_NTS) != SQL_SUCCESS) {
                x_err = "Unable to prepare SQL statement!";
                goto error;
        }

        result = SQLExecute(stmt);

        if (result != SQL_SUCCESS && result != SQL_SUCCESS_WITH_INFO && result != SQL_NO_DATA) {
                x_err = "execute error!";
                goto error;
        }

        SQLNumResultCols(stmt, &c);
        SQLRowCount(stmt, &m);
        handle->affected_rows = (int) m;


        while (!done) {
                int name_len = 256;
                char **names;
                char **vals;
                int y = 0;

                result = SQLFetch(stmt);

                if (result != SQL_SUCCESS) {
                        if (result != SQL_NO_DATA) {
                                err_cnt++;
                        }
                        break;
                }

                names = calloc(c, sizeof(*names));
                vals = calloc(c, sizeof(*vals));

                switch_assert(names && vals);

                for (x = 1; x <= c; x++) {
                        SQLSMALLINT NameLength = 0, DataType = 0, DecimalDigits = 0, Nullable = 0;
                        SQLULEN ColumnSize = 0;
                        names[y] = malloc(name_len);
                        memset(names[y], 0, name_len);

                        SQLDescribeCol(stmt, x, (SQLCHAR *) names[y], (SQLSMALLINT) name_len, &NameLength, &DataType, &ColumnSize, &DecimalDigits, &Nullable);

                        if (!ColumnSize) {
                                ColumnSize = 255;
                        }
                        ColumnSize++;

                        vals[y] = malloc(ColumnSize);
                        memset(vals[y], 0, ColumnSize);
                        SQLGetData(stmt, x, SQL_C_CHAR, (SQLCHAR *) vals[y], ColumnSize, NULL);
                        y++;
                }

                if (callback(pdata, y, vals, names)) {
                        done = 1;
                }

                for (x = 0; x < y; x++) {
                        free(names[x]);
                        free(vals[x]);
                }
                free(names);
                free(vals);
        }

        SQLFreeHandle(SQL_HANDLE_STMT, stmt);
        stmt = NULL; /* Make sure we don't try to free this handle again */
        
        if (!err_cnt) {
                return SWITCH_ODBC_SUCCESS;
        }

  error:

        if (stmt) {
                err_str = switch_odbc_handle_get_error(handle, stmt);
        }

        if (zstr(err_str) && !zstr(x_err)) {
                err_str = strdup(x_err);
        }

        if (err_str) {
                switch_log_printf(SWITCH_CHANNEL_ID_LOG, file, func, line, NULL, SWITCH_LOG_ERROR, "ERR: [%s]\n[%s]\n", sql, switch_str_nil(err_str));
                if (err) {
                        *err = err_str;
                } else {
                        free(err_str);
                }
        }

        if (stmt) {
                SQLFreeHandle(SQL_HANDLE_STMT, stmt);
        }


#endif
        return SWITCH_ODBC_FAIL;
}

SWITCH_DECLARE(void) switch_odbc_handle_destroy(switch_odbc_handle_t **handlep)
{
#ifdef SWITCH_HAVE_ODBC

        switch_odbc_handle_t *handle = NULL;

        if (!handlep) {
                return;
        }
        handle = *handlep;

        if (handle) {
                switch_odbc_handle_disconnect(handle);

                if (handle->env != SQL_NULL_HANDLE) {
                        SQLFreeHandle(SQL_HANDLE_DBC, handle->con);
                        SQLFreeHandle(SQL_HANDLE_ENV, handle->env);
                }
                switch_safe_free(handle->dsn);
                switch_safe_free(handle->username);
                switch_safe_free(handle->password);
                free(handle);
        }
        *handlep = NULL;
#else
        return;
#endif
}

SWITCH_DECLARE(switch_odbc_state_t) switch_odbc_handle_get_state(switch_odbc_handle_t *handle)
{
#ifdef SWITCH_HAVE_ODBC
        return handle ? handle->state : SWITCH_ODBC_STATE_INIT;
#else
        return SWITCH_ODBC_STATE_ERROR;
#endif
}

SWITCH_DECLARE(char *) switch_odbc_handle_get_error(switch_odbc_handle_t *handle, switch_odbc_statement_handle_t stmt)
{
#ifdef SWITCH_HAVE_ODBC

        char buffer[SQL_MAX_MESSAGE_LENGTH + 1] = "";
        char sqlstate[SQL_SQLSTATE_SIZE + 1] = "";
        SQLINTEGER sqlcode;
        SQLSMALLINT length;
        char *ret = NULL;

        if (SQLError(handle->env, handle->con, stmt, (SQLCHAR *) sqlstate, &sqlcode, (SQLCHAR *) buffer, sizeof(buffer), &length) == SQL_SUCCESS) {
                ret = switch_mprintf("STATE: %s CODE %ld ERROR: %s\n", sqlstate, sqlcode, buffer);
        };

        return ret;
#else
        return NULL;
#endif
}

SWITCH_DECLARE(int) switch_odbc_handle_affected_rows(switch_odbc_handle_t *handle)
{
#ifdef SWITCH_HAVE_ODBC
        return handle->affected_rows;
#else
        return 0;
#endif
}

SWITCH_DECLARE(switch_bool_t) switch_odbc_available(void)
{
#ifdef SWITCH_HAVE_ODBC
        return SWITCH_TRUE;
#else
        return SWITCH_FALSE;
#endif
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_SQLSetAutoCommitAttr(switch_odbc_handle_t *handle, switch_bool_t on)
{
#ifdef SWITCH_HAVE_ODBC
        if (on) {
                return SQLSetConnectAttr(handle->con, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER *) SQL_AUTOCOMMIT_ON, 0 );
        } else {
                return SQLSetConnectAttr(handle->con, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER *) SQL_AUTOCOMMIT_OFF, 0 );
        }
#else
        return (switch_odbc_status_t) SWITCH_FALSE;
#endif
}

SWITCH_DECLARE(switch_odbc_status_t) switch_odbc_SQLEndTran(switch_odbc_handle_t *handle, switch_bool_t commit)
{
#ifdef SWITCH_HAVE_ODBC
        if (commit) {
                return SQLEndTran(SQL_HANDLE_DBC, handle->con, SQL_COMMIT);
        } else {
                return SQLEndTran(SQL_HANDLE_DBC, handle->con, SQL_ROLLBACK);
        }
#else
        return (switch_odbc_status_t) SWITCH_FALSE;
#endif
}


/* For Emacs:
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 * mode:c
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 * End:
 * For VIM:
 * vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
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