Inheritance 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)

Detailed Description

Node class for the CTX_UNION_RESULT

Member Function Documentation

virtual bool opt_explain_json_namespace::union_result_ctx::add_subquery	(	subquery_list_enum	subquery_type,
		subquery_ctx *	ctx
	)		`[inline, virtual]`

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

virtual bool opt_explain_json_namespace::union_result_ctx::format ( Opt_trace_context * json ) [inline, virtual]

Pass the node with its child nodes to a JSON formatter

Parameters:

json Formatter

Return values:

false	Ok
true	Error

virtual bool opt_explain_json_namespace::union_result_ctx::format_body	(	Opt_trace_context *	json,
		Opt_trace_object *	obj
	)		`[inline, virtual]`

Format JSON object body

Parameters:

json	Formatter
obj	Object of this body

Return values:

false	Ok
true	Error

virtual size_t opt_explain_json_namespace::union_result_ctx::id ( bool hide ) [inline, virtual]

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

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