opt_explain_json_namespace::union_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::union_ctx:

Collaboration diagram for opt_explain_json_namespace::union_ctx:

Public Member Functions
	union_ctx (context *parent_arg)
virtual size_t	id (bool hide)
virtual bool	cacheable ()
virtual bool	dependent ()
virtual void	set_union_result (union_result_ctx *ctx)
	associate CTX_UNION_RESULT node with CTX_UNION node
virtual bool	add_query_spec (context *ctx)
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
virtual bool	format_unit (Opt_trace_context *json)
	Helper function to format output for HAVING, ORDER/GROUP BY subqueries.
virtual bool	add_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
Public Member Functions inherited from opt_explain_json_namespace::context
	context (Explain_context_enum type_arg, const char *name_arg, context *parent_arg)
virtual bool	format (Opt_trace_context *json)
bool	is_query_block () const
virtual class qep_row *	entry ()
virtual void	set_child (context *child)
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	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)

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
Protected Attributes inherited from opt_explain_json_namespace::context
const char *	name

Detailed Description

Node class for UNION (query expression)

Definition at line 1445 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::union_ctx::add_query_spec ( context *  ctx )

inlinevirtual

Add a query specification node to the CTX_UNION node

Parameters

ctx	query specification node

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::context.

Definition at line 1474 of file opt_explain_json.cc.

virtual size_t opt_explain_json_namespace::union_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

Implements opt_explain_json_namespace::context.

Definition at line 1464 of file opt_explain_json.cc.

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

• sql/opt_explain_json.cc