pars0opt.h
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- /******************************************************
- Simple SQL optimizer
- (c) 1997 Innobase Oy
- Created 12/21/1997 Heikki Tuuri
- *******************************************************/
- #ifndef pars0opt_h
- #define pars0opt_h
- #include "univ.i"
- #include "que0types.h"
- #include "usr0types.h"
- #include "pars0sym.h"
- #include "dict0types.h"
- #include "row0sel.h"
- /***********************************************************************
- 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. */
- void
- opt_search_plan(
- /*============*/
- sel_node_t* sel_node); /* in: parsed select node */
- /***********************************************************************
- 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. */
- void
- opt_find_all_cols(
- /*==============*/
- ibool copy_val, /* in: if TRUE, new found columns are
- added as columns to copy */
- dict_index_t* index, /* in: index to use */
- sym_node_list_t* col_list, /* in: base node of a list where
- to add new found columns */
- plan_t* plan, /* in: plan or NULL */
- que_node_t* exp); /* in: expression or condition */
- /************************************************************************
- Prints info of a query plan. */
- void
- opt_print_query_plan(
- /*=================*/
- sel_node_t* sel_node); /* in: select node */
- #ifndef UNIV_NONINL
- #include "pars0opt.ic"
- #endif
- #endif