Explain_join Class Reference

Inheritance diagram for Explain_join:

Collaboration diagram for Explain_join:

Public Member Functions
	Explain_join (THD *thd_arg, JOIN *join_arg, bool need_tmp_table_arg, bool need_order_arg, bool distinct_arg)

Protected Member Functions
virtual bool	shallow_explain ()
virtual bool	explain_table_name ()
virtual bool	explain_join_type ()
virtual bool	explain_key_and_len ()
virtual bool	explain_ref ()
virtual bool	explain_rows_and_filtered ()
virtual bool	explain_extra ()
virtual bool	explain_select_type ()
virtual bool	explain_id ()
Protected Member Functions inherited from Explain_table_base
	Explain_table_base (Explain_context_enum context_type_arg, THD *const thd_arg, JOIN *const join_arg)
	Explain_table_base (Explain_context_enum context_type_arg, THD *const thd_arg, TABLE *const table_arg)
virtual bool	explain_partitions ()
virtual bool	explain_possible_keys ()
bool	explain_key_parts (int key, uint key_parts)
bool	explain_key_and_len_quick (const SQL_SELECT *select)
bool	explain_key_and_len_index (int key)
bool	explain_key_and_len_index (int key, uint key_length, uint key_parts)
bool	explain_extra_common (const SQL_SELECT *select, const JOIN_TAB *tab, int quick_type, uint keyno)
bool	explain_tmptable_and_filesort (bool need_tmp_table_arg, bool need_sort_arg)
virtual bool	explain_modify_flags ()
Protected Member Functions inherited from Explain
	Explain (Explain_context_enum context_type_arg, THD *thd_arg, JOIN *join_arg=NULL)
bool	explain_subqueries (select_result *result)
bool	mark_subqueries (Item *item, qep_row *destination, Explain_context_enum type)
bool	mark_order_subqueries (const JOIN::ORDER_with_src &order)
bool	prepare_columns ()
bool	describe (uint8 mask) const
SELECT_LEX *	select_lex () const
bool	prepare (select_result *result)
bool	push_extra (Extra_tag tag)
bool	push_extra (Extra_tag tag, const String &arg)
bool	push_extra (Extra_tag tag, const char *arg)

Additional Inherited Members
Protected Attributes inherited from Explain_table_base
const TABLE *	table
key_map	usable_keys

Detailed Description

Explain_join class produces EXPLAIN output for JOINs

Definition at line 329 of file opt_explain.cc.

Member Function Documentation

bool Explain_join::explain_key_and_len ( )

protectedvirtual

fill col_key and and col_key_len fields together

Reimplemented from Explain.

Definition at line 1347 of file opt_explain.cc.

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bool Explain_join::explain_rows_and_filtered ( )

protectedvirtual

fill col_rows and col_filtered fields together

Reimplemented from Explain.

Definition at line 1393 of file opt_explain.cc.

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bool Explain_join::shallow_explain ( )

protectedvirtual

Explain everything but subqueries

Reimplemented from Explain.

Definition at line 1181 of file opt_explain.cc.

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The documentation for this class was generated from the following file:

• sql/opt_explain.cc