Inheritance diagram for opt_explain_json_namespace::union_result_ctx:

Collaboration diagram for opt_explain_json_namespace::union_result_ctx:

Public Member Functions
	union_result_ctx (context *parent_arg)
virtual size_t	id (bool hide)
virtual bool	cacheable ()
virtual bool	dependent ()
virtual qep_row *	entry ()
virtual bool	format_unit (Opt_trace_context *json)
	Helper function to format output for HAVING, ORDER/GROUP BY subqueries.
void	push_down_query_specs (List< context > *specs)
virtual bool	add_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
virtual bool	format (Opt_trace_context *json)
virtual bool	format_body (Opt_trace_context json, Opt_trace_object obj)
Public Member Functions inherited from opt_explain_json_namespace::table_base_ctx
	table_base_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg)
Public Member Functions inherited from opt_explain_json_namespace::context
	context (Explain_context_enum type_arg, const char name_arg, context parent_arg)
bool	is_query_block () const
virtual void	set_child (context *child)
virtual void	set_union_result (union_result_ctx *ctx)
	associate CTX_UNION_RESULT node with CTX_UNION node
virtual bool	format_nested_loop (Opt_trace_context *json)
virtual bool	add_join_tab (joinable_ctx *ctx)
virtual void	set_sort (sort_ctx *ctx)
virtual bool	add_query_spec (context *ctx)
virtual bool	find_and_set_derived (context *subquery)
virtual bool	add_where_subquery (subquery_ctx ctx, SELECT_LEX_UNIT subquery)
virtual bool	format_derived (Opt_trace_context *json)
	Helper function to format output for derived subquery if any.
virtual bool	format_where (Opt_trace_context *json)
	Helper function to format output for associated WHERE subqueries if any.
Public Member Functions inherited from Explain_context
	Explain_context (Explain_context_enum type_arg)
Public Member Functions inherited from qep_row
void	cleanup ()
virtual void	register_where_subquery (SELECT_LEX_UNIT *subquery)
Public Member Functions inherited from opt_explain_json_namespace::unit_ctx
	unit_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg)
bool	has_no_subqueries () const

Additional Inherited Members
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void *ptr, size_t size)
Public Attributes inherited from opt_explain_json_namespace::context
context *	parent
	link to parent node or NULL
Public Attributes inherited from qep_row
column< uint >	col_id
	"id" column: seq. number of SELECT withing the query
column< SELECT_LEX::type_enum >	col_select_type
	"select_type" column
mem_root_str	col_table_name
	"table" to which the row of output refers
List< const char >	col_partitions
	"partitions" column
mem_root_str	col_join_type
	"type" column, see join_type_str array
List< const char >	col_possible_keys
	"possible_keys": comma-separated list
mem_root_str	col_key
	"key" column: index that is actually decided to use
mem_root_str	col_key_len
	"key_length" column: length of the "key" above
List< const char >	col_ref
	"ref":columns/constants which are compared to "key"
column< longlong >	col_rows
	"rows": estimated number of examined table rows
column< float >	col_filtered
	"filtered": % of rows filtered by condition
List< extra >	col_extra
	"extra" column (traditional) or property list
mem_root_str	col_message
	replaces "Extra" column if not empty
mem_root_str	col_attached_condition
	former "Using where"
uint	query_block_id
	query block id for materialized subqueries
List < opt_explain_json_namespace::context >	derived_from
List< const char >	col_key_parts
	used parts of the key
bool	is_dependent
bool	is_cacheable
bool	using_temporary
bool	is_materialized_from_subquery
bool	is_update
bool	is_delete
Protected Attributes inherited from opt_explain_json_namespace::table_base_ctx
bool	is_hidden_id
Protected Attributes inherited from opt_explain_json_namespace::context
const char *	name

Detailed Description

Node class for the CTX_UNION_RESULT

Definition at line 635 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::union_result_ctx::add_subquery	(	subquery_list_enum	subquery_type,
		subquery_ctx *	ctx
	)

inlinevirtual

Append a subquery node to the specified list of the unit node

Parameters

subquery_type	Describes the Item tree where the subquery exists
ctx	Subquery node

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::unit_ctx.

Definition at line 658 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::union_result_ctx::format ( Opt_trace_context * json )

inlinevirtual

Pass the node with its child nodes to a JSON formatter

Parameters

json Formatter

Return values

false	Ok
true	Error

Note: The join_ctx class overloads this function.

Reimplemented from opt_explain_json_namespace::context.

Definition at line 672 of file opt_explain_json.cc.

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virtual bool opt_explain_json_namespace::union_result_ctx::format_body	(	Opt_trace_context *	json,
		Opt_trace_object *	obj
	)

inlinevirtual

Format JSON object body

Parameters

json	Formatter
obj	Object of this body

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::table_base_ctx.

Definition at line 695 of file opt_explain_json.cc.

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virtual size_t opt_explain_json_namespace::union_result_ctx::id ( bool hide )

inlinevirtual

Analogue of the "id" column in the traditional EXPLAIN output

Parameters

hide	if true, ban the output of K_SELECT_ID JSON property in the underlying table_with_where_and_derived_ctx objects

Returns: "Select number" that is associated with this node

Reimplemented from opt_explain_json_namespace::table_base_ctx.

Definition at line 649 of file opt_explain_json.cc.

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

sql/opt_explain_json.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation