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71 lines
1.5 KiB
Text
71 lines
1.5 KiB
Text
/******************************************************
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Executes SQL stored procedures and their control structures
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(c) 1998 Innobase Oy
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Created 1/20/1998 Heikki Tuuri
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*******************************************************/
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#include "pars0pars.h"
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#include "que0que.h"
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#include "eval0eval.h"
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/**************************************************************************
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Performs an execution step of a procedure node. */
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UNIV_INLINE
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que_thr_t*
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proc_step(
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/*======*/
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/* out: query thread to run next or NULL */
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que_thr_t* thr) /* in: query thread */
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{
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proc_node_t* node;
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ut_ad(thr);
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node = thr->run_node;
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ut_ad(que_node_get_type(node) == QUE_NODE_PROC);
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if (thr->prev_node == que_node_get_parent(node)) {
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/* Start execution from the first statement in the statement
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list */
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thr->run_node = node->stat_list;
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} else {
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/* Move to the next statement */
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ut_ad(que_node_get_next(thr->prev_node) == NULL);
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thr->run_node = NULL;
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}
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if (thr->run_node == NULL) {
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thr->run_node = que_node_get_parent(node);
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}
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return(thr);
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}
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/**************************************************************************
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Performs an execution step of a procedure call node. */
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UNIV_INLINE
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que_thr_t*
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proc_eval_step(
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/*===========*/
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/* out: query thread to run next or NULL */
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que_thr_t* thr) /* in: query thread */
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{
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func_node_t* node;
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ut_ad(thr);
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node = thr->run_node;
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ut_ad(que_node_get_type(node) == QUE_NODE_FUNC);
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/* Evaluate the procedure */
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eval_exp(node);
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thr->run_node = que_node_get_parent(node);
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return(thr);
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}
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