#include "univ.i"
#include "que0types.h"
#include "usr0types.h"
#include "pars0sym.h"
#include "dict0types.h"
#include "row0sel.h"
#include "pars0opt.ic"
Go to the source code of this file.
Functions | |
UNIV_INTERN void | opt_search_plan (sel_node_t *sel_node) |
UNIV_INTERN void | opt_find_all_cols (ibool copy_val, dict_index_t *index, sym_node_list_t *col_list, plan_t *plan, que_node_t *exp) |
UNIV_INTERN void | opt_print_query_plan (sel_node_t *sel_node) |
UNIV_INTERN void opt_find_all_cols | ( | ibool | copy_val, |
dict_index_t * | index, | ||
sym_node_list_t * | col_list, | ||
plan_t * | plan, | ||
que_node_t * | exp | ||
) |
Looks for occurrences of the columns of the table in the query subgraph and adds them to the list of columns if an occurrence of the same column does not already exist in the list. If the column is already in the list, puts a value indirection to point to the occurrence in the column list, except if the column occurrence we are looking at is in the column list, in which case nothing is done. in: expression or condition
Looks for occurrences of the columns of the table in the query subgraph and adds them to the list of columns if an occurrence of the same column does not already exist in the list. If the column is already in the list, puts a value indirection to point to the occurrence in the column list, except if the column occurrence we are looking at is in the column list, in which case nothing is done.
copy_val | in: if TRUE, new found columns are added as columns to copy |
index | in: index of the table to use |
col_list | in: base node of a list where to add new found columns |
plan | in: plan or NULL |
exp | in: expression or condition or NULL |
Definition at line 833 of file pars0opt.cc.
References sym_node_struct::alias, func_node_struct::args, sym_node_struct::col_no, sym_node_struct::copy_val, dict_index_is_clust(), sym_node_struct::field_nos, sym_node_struct::indirection, plan_struct::must_get_clust, opt_find_all_cols(), que_node_get_next(), que_node_get_type(), SYM_CLUST_FIELD_NO, SYM_COLUMN, SYM_SEC_FIELD_NO, dict_index_struct::table, sym_node_struct::table, sym_node_struct::token_type, ut_a, UT_LIST_ADD_LAST, UT_LIST_GET_FIRST, and UT_LIST_GET_NEXT.
Referenced by opt_find_all_cols().
UNIV_INTERN void opt_print_query_plan | ( | sel_node_t * | sel_node | ) |
Prints info of a query plan. in: select node
Prints info of a query plan.
sel_node | in: select node |
Definition at line 1176 of file pars0opt.cc.
References sel_node_struct::asc, sel_node_struct::consistent_read, dtuple_get_n_fields(), plan_struct::end_conds, plan_struct::index, plan_struct::n_exact_match, sel_node_struct::n_tables, opt_print_query_plan(), sel_node_struct::row_lock_mode, sel_node_get_nth_plan(), sel_node_struct::set_x_locks, plan_struct::tuple, ut_a, and UT_LIST_GET_LEN.
Referenced by opt_print_query_plan(), and opt_search_plan().
UNIV_INTERN void opt_search_plan | ( | sel_node_t * | sel_node | ) |
Optimizes a select. Decides which indexes to tables to use. The tables are accessed in the order that they were written to the FROM part in the select statement. in: parsed select node
Optimizes a select. Decides which indexes to tables to use. The tables are accessed in the order that they were written to the FROM part in the select statement.
sel_node | in: parsed select node |
Definition at line 1103 of file pars0opt.cc.
References order_node_struct::asc, sel_node_struct::asc, sym_tab_struct::heap, mem_heap_alloc(), sel_node_struct::n_tables, opt_print_query_plan(), opt_search_plan(), sel_node_struct::order_by, sel_node_struct::plans, que_node_get_next(), sym_node_struct::table, and sel_node_struct::table_list.
Referenced by opt_search_plan(), and pars_select_statement().