/*
* The execution after all parameters were resolved.
*/
static
RETCODE Exec_with_parameters_resolved(StatementClass *stmt, BOOL *exec_end)
{
CSTR func = "Exec_with_parameters_resolved";
RETCODE retval;
SQLLEN end_row;
SQLINTEGER cursor_type, scroll_concurrency;
ConnectionClass *conn;
QResultClass *res;
APDFields *apdopts;
IPDFields *ipdopts;
BOOL prepare_before_exec = FALSE;
*exec_end = FALSE;
conn = SC_get_conn(stmt);
mylog("%s: copying statement params: trans_status=%d, len=%d, stmt='%s'\n", func, conn->transact_status, strlen(stmt->statement), stmt->statement);
#define return DONT_CALL_RETURN_FROM_HERE???
#define RETURN(code) { retval = code; goto cleanup; }
ENTER_CONN_CS(conn);
/* save the cursor's info before the execution */
cursor_type = stmt->options.cursor_type;
scroll_concurrency = stmt->options.scroll_concurrency;
/* Prepare the statement if possible at backend side */
if (!stmt->inaccurate_result)
{
if (HowToPrepareBeforeExec(stmt, FALSE) >= allowParse)
prepare_before_exec = TRUE;
}
inolog("prepare_before_exec=%d srv=%d\n", prepare_before_exec, conn->connInfo.use_server_side_prepare);
/* Create the statement with parameters substituted. */
retval = copy_statement_with_parameters(stmt, prepare_before_exec);
stmt->current_exec_param = -1;
if (retval != SQL_SUCCESS)
{
stmt->exec_current_row = -1;
*exec_end = TRUE;
RETURN(retval) /* error msg is passed from the above */
}
/* Execute a prepared SQL statement */
RETCODE SQL_API
PGAPI_Execute(HSTMT hstmt, UWORD flag)
{
CSTR func = "PGAPI_Execute";
StatementClass *stmt = (StatementClass *) hstmt;
RETCODE retval = SQL_SUCCESS;
ConnectionClass *conn;
APDFields *apdopts;
IPDFields *ipdopts;
SQLLEN i, start_row, end_row;
BOOL exec_end, recycled = FALSE, recycle = TRUE;
SQLSMALLINT num_params;
mylog("%s: entering...%x\n", func, flag);
if (!stmt)
{
SC_log_error(func, "", NULL);
mylog("%s: NULL statement so return SQL_INVALID_HANDLE\n", func);
return SQL_INVALID_HANDLE;
}
conn = SC_get_conn(stmt);
apdopts = SC_get_APDF(stmt);
/*
* If the statement is premature, it means we already executed it from
* an SQLPrepare/SQLDescribeCol type of scenario. So just return
* success.
*/
if (stmt->prepare && stmt->status == STMT_PREMATURE)
{
if (stmt->inaccurate_result)
{
stmt->exec_current_row = -1;
SC_recycle_statement(stmt);
}
else
{
stmt->status = STMT_FINISHED;
if (NULL == SC_get_errormsg(stmt))
{
mylog("%s: premature statement but return SQL_SUCCESS\n", func);
retval = SQL_SUCCESS;
goto cleanup;
}
else
{
SC_set_error(stmt,STMT_INTERNAL_ERROR, "premature statement so return SQL_ERROR", func);
retval = SQL_ERROR;
goto cleanup;
}
}
}
mylog("%s: clear errors...\n", func);
SC_clear_error(stmt);
if (!stmt->statement)
{
SC_set_error(stmt, STMT_NO_STMTSTRING, "This handle does not have a SQL statement stored in it", func);
mylog("%s: problem with handle\n", func);
return SQL_ERROR;
}
#define return DONT_CALL_RETURN_FROM_HERE???
if (stmt->exec_current_row > 0)
{
/*
* executing an array of parameters.
* Don't recycle the statement.
*/
recycle = FALSE;
}
else if (PREPARED_PERMANENTLY == stmt->prepared ||
PREPARED_TEMPORARILY == stmt->prepared)
{
QResultClass *res;
/*
* re-executing an prepared statement.
* Don't recycle the statement but
* discard the old result.
*/
recycle = FALSE;
if (res = SC_get_Result(stmt), res)
QR_close_result(res, FALSE);
}
/*
* If SQLExecute is being called again, recycle the statement. Note
* this should have been done by the application in a call to
* SQLFreeStmt(SQL_CLOSE) or SQLCancel.
*/
else if (stmt->status == STMT_FINISHED)
{
mylog("%s: recycling statement (should have been done by app)...\n", func);
/******** Is this really NEEDED ? ******/
SC_recycle_statement(stmt);
recycled = TRUE;
}
/* Check if the statement is in the correct state */
else if ((stmt->prepare && stmt->status != STMT_READY) ||
(stmt->status != STMT_ALLOCATED && stmt->status != STMT_READY))
{
SC_set_error(stmt, STMT_STATUS_ERROR, "The handle does not point to a statement that is ready to be executed", func);
mylog("%s: problem with statement\n", func);
retval = SQL_ERROR;
goto cleanup;
}
if (start_row = stmt->exec_start_row, start_row < 0)
start_row = 0;
if (end_row = stmt->exec_end_row, end_row < 0)
end_row = (SQLINTEGER) apdopts->paramset_size - 1;
if (stmt->exec_current_row < 0)
stmt->exec_current_row = start_row;
ipdopts = SC_get_IPDF(stmt);
num_params = stmt->num_params;
if (num_params < 0)
PGAPI_NumParams(stmt, &num_params);
if (stmt->exec_current_row == start_row)
{
/*
We sometimes need to know about the PG type of binding
parameters even in case of non-prepared statements.
*/
int nCallParse = doNothing;
if (NOT_YET_PREPARED == stmt->prepared)
{
switch (nCallParse = HowToPrepareBeforeExec(stmt, TRUE))
{
case shouldParse:
if (retval = prepareParameters(stmt, TRUE), SQL_ERROR == retval)
goto cleanup;
break;
}
}
mylog("prepareParameters was %s called, prepare state:%d\n", shouldParse == nCallParse ? "" : "not", stmt->prepare);
if (ipdopts->param_processed_ptr)
*ipdopts->param_processed_ptr = 0;
#if (ODBCVER >= 0x0300)
/*
* Initialize the param_status_ptr
*/
if (ipdopts->param_status_ptr)
{
for (i = 0; i <= end_row; i++)
ipdopts->param_status_ptr[i] = SQL_PARAM_UNUSED;
}
#endif /* ODBCVER */
if (recycle && !recycled)
SC_recycle_statement(stmt);
if (isSqlServr() &&
!stmt->internal &&
0 != stmt->prepare &&
PG_VERSION_LT(conn, 8.4) &&
SC_can_parse_statement(stmt))
parse_sqlsvr(stmt);
}
/*
* Clear any old result sets before executing. The prepare stage might've
* created one.
*/
SC_set_Result(stmt, NULL);
next_param_row:
#if (ODBCVER >= 0x0300)
if (apdopts->param_operation_ptr)
{
while (apdopts->param_operation_ptr[stmt->exec_current_row] == SQL_PARAM_IGNORE)
{
if (stmt->exec_current_row >= end_row)
{
stmt->exec_current_row = -1;
retval = SQL_SUCCESS;
goto cleanup;
}
++stmt->exec_current_row;
}
}
/*
* Initialize the current row status
*/
if (ipdopts->param_status_ptr)
ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_ERROR;
#endif /* ODBCVER */
/*
* Check if statement has any data-at-execute parameters when it is
* not in SC_pre_execute.
*/
if (!stmt->pre_executing)
{
/*
* The bound parameters could have possibly changed since the last
* execute of this statement? Therefore check for params and
* re-copy.
*/
SQLULEN offset = apdopts->param_offset_ptr ? *apdopts->param_offset_ptr : 0;
SQLINTEGER bind_size = apdopts->param_bind_type;
SQLLEN current_row = stmt->exec_current_row < 0 ? 0 : stmt->exec_current_row;
Int4 num_p = num_params < apdopts->allocated ? num_params : apdopts->allocated;
/*
* Increment the number of currently processed rows
*/
if (ipdopts->param_processed_ptr)
(*ipdopts->param_processed_ptr)++;
stmt->data_at_exec = -1;
for (i = 0; i < num_p; i++)
{
SQLLEN *pcVal = apdopts->parameters[i].used;
apdopts->parameters[i].data_at_exec = FALSE;
if (pcVal)
{
if (bind_size > 0)
pcVal = LENADDR_SHIFT(pcVal, offset + bind_size * current_row);
else
pcVal = LENADDR_SHIFT(pcVal, offset) + current_row;
if (*pcVal == SQL_DATA_AT_EXEC || *pcVal <= SQL_LEN_DATA_AT_EXEC_OFFSET)
apdopts->parameters[i].data_at_exec = TRUE;
}
/* Check for data at execution parameters */
if (apdopts->parameters[i].data_at_exec)
{
mylog("The %dth parameter of %d-row is data at exec(%d)\n", i, current_row, *pcVal);
if (stmt->data_at_exec < 0)
stmt->data_at_exec = 1;
else
stmt->data_at_exec++;
}
}
/*
* If there are some data at execution parameters, return need
* data
*/
/*
* SQLParamData and SQLPutData will be used to send params and
* execute the statement.
*/
if (stmt->data_at_exec > 0)
{
retval = SQL_NEED_DATA;
goto cleanup;
}
}
if (0 != (flag & PODBC_WITH_HOLD))
SC_set_with_hold(stmt);
retval = Exec_with_parameters_resolved(stmt, &exec_end);
if (!exec_end)
{
stmt->curr_param_result = 0;
goto next_param_row;
}
cleanup:
mylog("retval=%d\n", retval);
SC_setInsertedTable(stmt, retval);
#undef return
if (stmt->internal)
retval = DiscardStatementSvp(stmt, retval, FALSE);
return retval;
}
/*
* The execution after all parameters were resolved.
*/
static
RETCODE Exec_with_parameters_resolved(StatementClass *stmt, BOOL *exec_end)
{
CSTR func = "Exec_with_parameters_resolved";
RETCODE retval;
SQLLEN end_row;
SQLINTEGER cursor_type, scroll_concurrency;
ConnectionClass *conn;
QResultClass *res;
APDFields *apdopts;
IPDFields *ipdopts;
BOOL prepare_before_exec = FALSE;
*exec_end = FALSE;
conn = SC_get_conn(stmt);
mylog("%s: copying statement params: trans_status=%d, len=%d, stmt='%s'\n", func, conn->transact_status, strlen(stmt->statement), stmt->statement);
/* save the cursor's info before the execution */
cursor_type = stmt->options.cursor_type;
scroll_concurrency = stmt->options.scroll_concurrency;
/* Prepare the statement if possible at backend side */
if (!stmt->inaccurate_result)
{
if (HowToPrepareBeforeExec(stmt, FALSE) >= allowParse)
prepare_before_exec = TRUE;
}
inolog("prepare_before_exec=%d srv=%d\n", prepare_before_exec, conn->connInfo.use_server_side_prepare);
/* Create the statement with parameters substituted. */
retval = copy_statement_with_parameters(stmt, prepare_before_exec);
stmt->current_exec_param = -1;
if (retval != SQL_SUCCESS)
{
stmt->exec_current_row = -1;
*exec_end = TRUE;
return retval; /* error msg is passed from the above */
}
mylog(" stmt_with_params = '%s'\n", stmt->stmt_with_params);
/*
* Dummy exection to get the column info.
*/
if (stmt->inaccurate_result && SC_is_parse_tricky(stmt))
{
BOOL in_trans = CC_is_in_trans(conn);
BOOL issued_begin = FALSE;
QResultClass *curres;
stmt->exec_current_row = -1;
*exec_end = TRUE;
if (!SC_is_pre_executable(stmt))
return SQL_SUCCESS;
if (strnicmp(stmt->stmt_with_params, "BEGIN;", 6) == 0)
{
/* do nothing */
}
else if (!in_trans)
{
if (issued_begin = CC_begin(conn), !issued_begin)
{
SC_set_error(stmt, STMT_EXEC_ERROR, "Handle prepare error", func);
return SQL_ERROR;
}
}
/* we are now in a transaction */
res = CC_send_query(conn, stmt->stmt_with_params, NULL, 0, SC_get_ancestor(stmt));
if (!QR_command_maybe_successful(res))
{
#ifndef _LEGACY_MODE_
if (PG_VERSION_LT(conn, 8.0))
CC_abort(conn);
#endif /* LEGACY_MODE_ */
SC_set_error(stmt, STMT_EXEC_ERROR, "Handle prepare error", func);
QR_Destructor(res);
return SQL_ERROR;
}
SC_set_Result(stmt, res);
for (curres = res; !curres->num_fields; curres = curres->next)
;
SC_set_Curres(stmt, curres);
if (CC_does_autocommit(conn))
{
if (issued_begin)
CC_commit(conn);
}
stmt->status = STMT_FINISHED;
return SQL_SUCCESS;
}
/*
* The real execution.
*/
mylog("about to begin SC_execute\n");
retval = SC_execute(stmt);
if (retval == SQL_ERROR)
{
stmt->exec_current_row = -1;
*exec_end = TRUE;
return retval;
}
res = SC_get_Result(stmt);
/* special handling of result for keyset driven cursors */
if (SQL_CURSOR_KEYSET_DRIVEN == stmt->options.cursor_type &&
SQL_CONCUR_READ_ONLY != stmt->options.scroll_concurrency)
{
QResultClass *kres;
if (kres = res->next, kres)
{
if (kres->fields)
CI_Destructor(kres->fields);
kres->fields = res->fields;
res->fields = NULL;
kres->num_fields = res->num_fields;
res->next = NULL;
SC_set_Result(stmt, kres);
res = kres;
}
}
#ifdef NOT_USED
else if (SC_is_concat_prepare_exec(stmt))
{
if (res && QR_command_maybe_successful(res))
{
QResultClass *kres;
kres = res->next;
inolog("res->next=%p\n", kres);
res->next = NULL;
SC_set_Result(stmt, kres);
res = kres;
SC_set_prepared(stmt, PREPARED_PERMANENTLY);
}
else
{
retval = SQL_ERROR;
if (stmt->execute_statement)
free(stmt->execute_statement);
stmt->execute_statement = NULL;
}
}
#endif /* NOT_USED */
#if (ODBCVER >= 0x0300)
ipdopts = SC_get_IPDF(stmt);
if (ipdopts->param_status_ptr)
{
switch (retval)
{
case SQL_SUCCESS:
ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_SUCCESS;
break;
case SQL_SUCCESS_WITH_INFO:
ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_SUCCESS_WITH_INFO;
break;
default:
ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_ERROR;
break;
}
}
#endif /* ODBCVER */
if (end_row = stmt->exec_end_row, end_row < 0)
{
apdopts = SC_get_APDF(stmt);
end_row = (SQLINTEGER) apdopts->paramset_size - 1;
}
if (stmt->inaccurate_result ||
stmt->exec_current_row >= end_row)
{
*exec_end = TRUE;
stmt->exec_current_row = -1;
}
else
stmt->exec_current_row++;
if (res)
{
#if (ODBCVER >= 0x0300)
EnvironmentClass *env = (EnvironmentClass *) CC_get_env(conn);
const char *cmd = QR_get_command(res);
SQLLEN start_row;
if (start_row = stmt->exec_start_row, start_row < 0)
start_row = 0;
if (retval == SQL_SUCCESS &&
NULL != cmd &&
start_row >= end_row &&
NULL != env &&
EN_is_odbc3(env))
{
int count;
if (sscanf(cmd , "UPDATE %d", &count) == 1)
;
else if (sscanf(cmd , "DELETE %d", &count) == 1)
;
else
count = -1;
if (0 == count)
retval = SQL_NO_DATA;
}
#endif /* ODBCVER */
stmt->diag_row_count = res->recent_processed_row_count;
}
/*
* The cursor's info was changed ?
*/
if (retval == SQL_SUCCESS &&
(stmt->options.cursor_type != cursor_type ||
stmt->options.scroll_concurrency != scroll_concurrency))
{
SC_set_error(stmt, STMT_OPTION_VALUE_CHANGED, "cursor updatability changed", func);
retval = SQL_SUCCESS_WITH_INFO;
}
return retval;
}
