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/*****************************************************************************
Copyright (c) 1998, 2009, Innobase Oy. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*****************************************************************************/
/**************************************************//**
@file include/eval0proc.ic
Executes SQL stored procedures and their control structures
Created 1/20/1998 Heikki Tuuri
*******************************************************/
#include "pars0pars.h"
#include "que0que.h"
#include "eval0eval.h"
/**********************************************************************//**
Performs an execution step of a procedure node.
@return query thread to run next or NULL */
UNIV_INLINE
que_thr_t*
proc_step(
/*======*/
que_thr_t* thr) /*!< in: query thread */
{
proc_node_t* node;
ut_ad(thr);
node = thr->run_node;
ut_ad(que_node_get_type(node) == QUE_NODE_PROC);
if (thr->prev_node == que_node_get_parent(node)) {
/* Start execution from the first statement in the statement
list */
thr->run_node = node->stat_list;
} else {
/* Move to the next statement */
ut_ad(que_node_get_next(thr->prev_node) == NULL);
thr->run_node = NULL;
}
if (thr->run_node == NULL) {
thr->run_node = que_node_get_parent(node);
}
return(thr);
}
/**********************************************************************//**
Performs an execution step of a procedure call node.
@return query thread to run next or NULL */
UNIV_INLINE
que_thr_t*
proc_eval_step(
/*===========*/
que_thr_t* thr) /*!< in: query thread */
{
func_node_t* node;
ut_ad(thr);
node = thr->run_node;
ut_ad(que_node_get_type(node) == QUE_NODE_FUNC);
/* Evaluate the procedure */
eval_exp(node);
thr->run_node = que_node_get_parent(node);
return(thr);
}
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