Inheritance diagram for opt_explain_json_namespace::simple_sort_ctx:

Public Member Functions
	simple_sort_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg, const Explain_format_flags *flags, Explain_sort_clause clause)
virtual bool	add_join_tab (joinable_ctx *ctx)
virtual bool	add_where_subquery (subquery_ctx ctx, SELECT_LEX_UNIT subquery)
virtual bool	find_and_set_derived (context *subquery)
virtual size_t	id (bool hide)
virtual bool	cacheable ()
virtual bool	dependent ()
Protected Member Functions
virtual bool	format_body (Opt_trace_context json, Opt_trace_object obj)
Protected Attributes
joinable_ctx *	join_tab

Detailed Description

Base class for CTX_ORDER_BY, CTX_GROUP_BY and node class for CTX_DISTINCT

This class represents context for simple ORDER BY/GROUP BY/DISTINCT clauses (the clause is effective for the single JOIN_TAB).

Member Function Documentation

virtual bool opt_explain_json_namespace::simple_sort_ctx::add_join_tab ( joinable_ctx * ctx ) [inline, virtual]

Add a CTX_JOIN_TAB node to a CTX_JOIN node

Parameters:

ctx	CTX_JOIN_TAB node

Return values:

false	Ok
true	Error

virtual bool opt_explain_json_namespace::simple_sort_ctx::add_where_subquery	(	subquery_ctx *	ctx,
		SELECT_LEX_UNIT *	subquery
	)		`[inline, virtual]`

Associate WHERE subqueries of given context and unit with this object

Parameters:

ctx	Context of WHERE subquery
subquery	For CTX_JOIN_TAB: match given unit with a previously collected by the register_where_subquery function.

virtual bool opt_explain_json_namespace::simple_sort_ctx::find_and_set_derived ( context * subquery ) [inline, virtual]

Try to associate a derived subquery node with this or underlying node

Parameters:

subquery Derived subquery node

Return values:

true	Success
false	Can't associate: this node or its child nodes are not derived from the subquery

virtual bool opt_explain_json_namespace::simple_sort_ctx::format_body	(	Opt_trace_context *	json,
		Opt_trace_object *	obj
	)		`[inline, protected, 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::simple_sort_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: