sql_union.cc File Reference

#include "sql/sql_union.h"
#include <sys/types.h>
#include <algorithm>
#include <atomic>
#include <cassert>
#include <cstdint>
#include <cstdio>
#include <limits>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "mem_root_deque.h"
#include "my_alloc.h"
#include "my_base.h"
#include "my_dbug.h"
#include "my_sqlcommand.h"
#include "my_sys.h"
#include "mysql/udf_registration_types.h"
#include "mysqld_error.h"
#include "prealloced_array.h"
#include "scope_guard.h"
#include "sql/auth/auth_acls.h"
#include "sql/current_thd.h"
#include "sql/debug_sync.h"
#include "sql/field.h"
#include "sql/handler.h"
#include "sql/item.h"
#include "sql/item_subselect.h"
#include "sql/iterators/row_iterator.h"
#include "sql/join_optimizer/access_path.h"
#include "sql/join_optimizer/bit_utils.h"
#include "sql/join_optimizer/explain_access_path.h"
#include "sql/join_optimizer/join_optimizer.h"
#include "sql/join_optimizer/materialize_path_parameters.h"
#include "sql/mem_root_array.h"
#include "sql/mysqld.h"
#include "sql/opt_explain.h"
#include "sql/opt_explain_format.h"
#include "sql/opt_trace.h"
#include "sql/parse_tree_node_base.h"
#include "sql/parse_tree_nodes.h"
#include "sql/parser_yystype.h"
#include "sql/pfs_batch_mode.h"
#include "sql/protocol.h"
#include "sql/query_options.h"
#include "sql/query_term.h"
#include "sql/sql_base.h"
#include "sql/sql_class.h"
#include "sql/sql_cmd.h"
#include "sql/sql_const.h"
#include "sql/sql_error.h"
#include "sql/sql_executor.h"
#include "sql/sql_lex.h"
#include "sql/sql_list.h"
#include "sql/sql_optimizer.h"
#include "sql/sql_select.h"
#include "sql/sql_tmp_table.h"
#include "sql/table_function.h"
#include "sql/thd_raii.h"
#include "sql/visible_fields.h"
#include "sql/window.h"
#include "template_utils.h"

Classes
class	Query_result_union_direct
	This class is effectively dead. More...

Functions
static bool	finalize_full_text_functions (THD *thd, Query_expression *query_expression)
	Finalizes the initialization of all the full-text functions used in the given query expression, and recursively in every query expression inner to the given one. More...
static bool	contributes_to_rowcount_estimate (Query_block *qb)
	Determine if we should set or add the contribution of the given query block to the total row count estimate for the query expression. More...
static bool	use_iterator (TABLE *materialize_destination, Query_term *query_term)
static void	cleanup_tmp_tables (Table_ref *list)
	Closes (and, if last reference, drops) temporary tables created to materialize derived tables, schema tables and CTEs. More...
static void	destroy_tmp_tables (Table_ref *list)
	Destroy temporary tables created to materialize derived tables, schema tables and CTEs. More...

Function Documentation

cleanup_tmp_tables()

static void cleanup_tmp_tables ( Table_ref *  list )

static

Closes (and, if last reference, drops) temporary tables created to materialize derived tables, schema tables and CTEs.

Parameters

list	List of tables to search in

contributes_to_rowcount_estimate()

static bool contributes_to_rowcount_estimate ( Query_block *  qb )

static

Determine if we should set or add the contribution of the given query block to the total row count estimate for the query expression.

If we have INTERSECT or EXCEPT, only set row estimate for left side since the total number of rows in the result set can only decrease as a result of the set operation.

Parameters

qb	query block

Returns

true if the estimate should be added

destroy_tmp_tables()

static void destroy_tmp_tables ( Table_ref *  list )

static

Destroy temporary tables created to materialize derived tables, schema tables and CTEs.

Parameters

list	List of tables to search in

finalize_full_text_functions()

static bool finalize_full_text_functions ( THD *  thd, Query_expression *  query_expression  )

static

Finalizes the initialization of all the full-text functions used in the given query expression, and recursively in every query expression inner to the given one.

We do this fairly late, since we need to know whether or not the full-text function is to be used for a full-text index scan, and whether or not that scan is sorted. When the iterators have been created, we know that the final decision has been made, so we do it right after the iterators have been created.

use_iterator()

static bool use_iterator ( TABLE *  materialize_destination, Query_term *  query_term  )

static