Change the driver so that large error messages are returned

by multiple SQLError calls.

diff --git a/src/interfaces/odbc/environ.c b/src/interfaces/odbc/environ.c
index 5a6b6b1..506ca5c 100644 (file)
--- a/src/interfaces/odbc/environ.c
+++ b/src/interfaces/odbc/environ.c
@@ -91,12 +91,16 @@ SQLError(
        char       *msg;
        int                     status;
 
-       mylog("**** SQLError: henv=%u, hdbc=%u, hstmt=%u\n", henv, hdbc, hstmt);
+       mylog("**** SQLError: henv=%u, hdbc=%u, hstmt=%u <%d>\n", henv, hdbc, hstmt, cbErrorMsgMax);
 
+       if (cbErrorMsgMax < 0)
+               return SQL_ERROR;
        if (SQL_NULL_HSTMT != hstmt)
        {
                /* CC: return an error of a hstmt  */
                StatementClass *stmt = (StatementClass *) hstmt;
+               SWORD   msglen;
+               BOOL    once_again = FALSE;
 
                if (SC_get_error(stmt, &status, &msg))
                {
@@ -112,8 +116,18 @@ SQLError(
 
                                return SQL_NO_DATA_FOUND;
                        }
+                       msglen = (SWORD) strlen(msg);
                        if (NULL != pcbErrorMsg)
-                               *pcbErrorMsg = (SWORD) strlen(msg);
+                       {
+                               *pcbErrorMsg = msglen;
+                               if (cbErrorMsgMax == 0)
+                                       once_again = TRUE;
+                               else if (msglen >= cbErrorMsgMax)
+                               {
+                                       once_again = TRUE;
+                                       *pcbErrorMsg = cbErrorMsgMax - 1;
+                               }
+                       }
 
                        if ((NULL != szErrorMsg) && (cbErrorMsgMax > 0))
                                strncpy_null(szErrorMsg, msg, cbErrorMsgMax);
@@ -238,7 +252,27 @@ SQLError(
                        return SQL_NO_DATA_FOUND;
                }
 
-               return SQL_SUCCESS;
+               if (once_again)
+               {
+                       int     outlen;
+                       stmt->errornumber = status;
+                       if (cbErrorMsgMax > 0)
+                               outlen = *pcbErrorMsg;
+                       else
+                               outlen = 0;
+                       if (!stmt->errormsg_malloced || !stmt->errormsg)
+                       {
+                               stmt->errormsg = malloc(msglen - outlen + 1);
+                               stmt->errormsg_malloced = TRUE;
+                       }
+                       memmove(stmt->errormsg, msg + outlen, msglen - outlen + 1);
+               }
+               else if (stmt->errormsg_malloced)
+                       SC_clear_error(stmt);
+               if (cbErrorMsgMax == 0)
+                       return SQL_SUCCESS_WITH_INFO;
+               else
+                       return SQL_SUCCESS;
        }
        else if (SQL_NULL_HDBC != hdbc)
        {

diff --git a/src/interfaces/odbc/statement.c b/src/interfaces/odbc/statement.c
index ba6ca3e..fd77eee 100644 (file)
--- a/src/interfaces/odbc/statement.c
+++ b/src/interfaces/odbc/statement.c
@@ -248,6 +248,7 @@ SC_Constructor(void)
                rv->errormsg = NULL;
                rv->errornumber = 0;
                rv->errormsg_created = FALSE;
+               rv->errormsg_malloced = FALSE;
 
                rv->statement = NULL;
                rv->stmt_with_params = NULL;
@@ -530,9 +531,12 @@ SC_recycle_statement(StatementClass *self)
        self->bind_row = 0;
        self->last_fetch_count = 0;
 
+       if (self->errormsg_malloced && self->errormsg)
+               free(self->errormsg);
        self->errormsg = NULL;
        self->errornumber = 0;
        self->errormsg_created = FALSE;
+       self->errormsg_malloced = FALSE;
 
        self->lobj_fd = -1;
 
@@ -610,9 +614,12 @@ SC_unbind_cols(StatementClass *self)
 void
 SC_clear_error(StatementClass *self)
 {
+       if (self->errormsg_malloced && self->errormsg)
+               free(self->errormsg);
        self->errornumber = 0;
        self->errormsg = NULL;
        self->errormsg_created = FALSE;
+       self->errormsg_malloced = FALSE;
 }
 
 
@@ -675,7 +682,8 @@ SC_get_error(StatementClass *self, int *number, char **message)
        {
                *number = self->errornumber;
                *message = self->errormsg;
-               self->errormsg = NULL;
+               if (!self->errormsg_malloced)
+                       self->errormsg = NULL;
        }
 
        rv = (self->errornumber != 0);

diff --git a/src/interfaces/odbc/statement.h b/src/interfaces/odbc/statement.h
index fe0b4a0..3f2fef5 100644 (file)
--- a/src/interfaces/odbc/statement.h
+++ b/src/interfaces/odbc/statement.h
@@ -218,6 +218,8 @@ struct StatementClass_
        char            pre_executing;  /* This statement is prematurely executing */
        char            inaccurate_result;              /* Current status is PREMATURE but
                                                                                 * result is inaccurate */
+       char            errormsg_malloced;              /* Current status is PREMATURE but
+                                                                                * result is inaccurate */
 };
 
 #define SC_get_conn(a)   (a->hdbc)