parse_tree_hints.cc File Reference

#include "sql/parse_tree_hints.h"
#include <assert.h>
#include <cstddef>
#include <cstdio>
#include <cstring>
#include "lex_string.h"
#include "m_ctype.h"
#include "m_string.h"
#include "my_alloc.h"
#include "my_sqlcommand.h"
#include "mysqld_error.h"
#include "sql/derror.h"
#include "sql/item_subselect.h"
#include "sql/mysqld.h"
#include "sql/parse_tree_helpers.h"
#include "sql/query_options.h"
#include "sql/resourcegroups/resource_group_basic_types.h"
#include "sql/resourcegroups/resource_group_mgr.h"
#include "sql/set_var.h"
#include "sql/sql_class.h"
#include "sql/sql_const.h"
#include "sql/sql_error.h"
#include "sql/sql_lex.h"

Functions
static Opt_hints_global *	get_global_hints (Parse_context *pc)
	Returns pointer to Opt_hints_global object, create Opt_hints object if not exist. More...
static Opt_hints_qb *	get_qb_hints (Parse_context *pc, Query_block *select)
	Returns pointer to Opt_hints_qb object for query block given by parse context, create Opt_hints_qb object if not exist. More...
static Opt_hints_qb *	find_qb_hints (Parse_context *pc, const LEX_CSTRING *qb_name, PT_hint *hint)
	Find existing Opt_hints_qb object, print warning if the query block is not found. More...
static Opt_hints_table *	get_table_hints (Parse_context *pc, Hint_param_table *table_name, Opt_hints_qb *qb)
	Returns pointer to Opt_hints_table object, create Opt_hints_table object if not exist. More...

Variables
struct st_opt_hint_info	opt_hint_info []
	Information about hints. More...

Function Documentation

find_qb_hints()

static Opt_hints_qb * find_qb_hints ( Parse_context *  pc, const LEX_CSTRING *  qb_name, PT_hint *  hint  )

static

Find existing Opt_hints_qb object, print warning if the query block is not found.

Parameters

pc	pointer to Parse_context object
qb_name	query block name
hint	processed hint

Returns

pointer to Opt_hints_table object if found, NULL otherwise

get_global_hints()

static Opt_hints_global * get_global_hints ( Parse_context *  pc )

static

Returns pointer to Opt_hints_global object, create Opt_hints object if not exist.

Parameters

pc	pointer to Parse_context object

Returns

pointer to Opt_hints object, NULL if failed to create the object

get_qb_hints()

static Opt_hints_qb * get_qb_hints ( Parse_context *  pc, Query_block *  select  )

static

Returns pointer to Opt_hints_qb object for query block given by parse context, create Opt_hints_qb object if not exist.

Parameters

pc	pointer to Parse_context object
select	pointer to Query_block object

Returns

pointer to Opt_hints_qb object, NULL if failed to create the object

get_table_hints()

static Opt_hints_table * get_table_hints ( Parse_context *  pc, Hint_param_table *  table_name, Opt_hints_qb *  qb  )

static

Returns pointer to Opt_hints_table object, create Opt_hints_table object if not exist.

Parameters

pc	pointer to Parse_context object
table_name	pointer to Hint_param_table object
qb	pointer to Opt_hints_qb object

Returns

pointer to Opt_hints_table object, NULL if failed to create the object

Variable Documentation

opt_hint_info

struct st_opt_hint_info opt_hint_info[]

extern

Information about hints.

Should be synchronized with opt_hints_enum enum.

Note: Hint name depends on hint state. 'NO_' prefix is added if appropriate hint state bit(see Opt_hints_map::hints) is not set. Depending on 'switch_state_arg' argument in 'parse tree object' constructors(see parse_tree_hints.[h,cc]) implementor can control wishful form of the hint name.