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7c725b2486
Added option --max-record-length=# to myisamchk Don't try repair twice if doing myisamchk --repair --force Shared memory handler didn't clean up things on errors or shutdown
91 lines
2 KiB
Text
91 lines
2 KiB
Text
/******************************************************
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Select
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(c) 1997 Innobase Oy
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Created 12/19/1997 Heikki Tuuri
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*******************************************************/
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#include "que0que.h"
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/*************************************************************************
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Gets the plan node for the nth table in a join. */
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UNIV_INLINE
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plan_t*
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sel_node_get_nth_plan(
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/*==================*/
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/* out: plan node */
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sel_node_t* node, /* in: select node */
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ulint i) /* in: get ith plan node */
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{
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ut_ad(i < node->n_tables);
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return(node->plans + i);
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}
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/*************************************************************************
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Resets the cursor defined by sel_node to the SEL_NODE_OPEN state, which means
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that it will start fetching from the start of the result set again, regardless
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of where it was before, and it will set intention locks on the tables. */
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UNIV_INLINE
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void
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sel_node_reset_cursor(
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/*==================*/
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sel_node_t* node) /* in: select node */
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{
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node->state = SEL_NODE_OPEN;
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}
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/**************************************************************************
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Performs an execution step of an open or close cursor statement node. */
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UNIV_INLINE
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que_thr_t*
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open_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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sel_node_t* sel_node;
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open_node_t* node;
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ulint err;
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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_OPEN);
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sel_node = node->cursor_def;
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err = DB_SUCCESS;
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if (node->op_type == ROW_SEL_OPEN_CURSOR) {
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/* if (sel_node->state == SEL_NODE_CLOSED) { */
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sel_node_reset_cursor(sel_node);
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/* } else {
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err = DB_ERROR;
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} */
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} else {
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if (sel_node->state != SEL_NODE_CLOSED) {
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sel_node->state = SEL_NODE_CLOSED;
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} else {
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err = DB_ERROR;
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}
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}
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if (err != DB_SUCCESS) {
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/* SQL error detected */
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printf("SQL error %lu\n", (unsigned long) err);
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ut_error;
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que_thr_handle_error(thr, err, NULL, 0);
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return(NULL);
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}
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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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