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/******************************************************
Executes SQL stored procedures and their control structures
(c) 1998 Innobase Oy
Created 1/20/1998 Heikki Tuuri
*******************************************************/
#include "pars0pars.h"
#include "que0que.h"
#include "eval0eval.h"
/**************************************************************************
Performs an execution step of a procedure node. */
UNIV_INLINE
que_thr_t*
proc_step(
/*======*/
/* out: query thread to run next or NULL */
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. */
UNIV_INLINE
que_thr_t*
proc_eval_step(
/*===========*/
/* out: query thread to run next or NULL */
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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