opt_explain_json_namespace::unit_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::unit_ctx:

List of all members.

Public Member Functions
	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)

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Detailed Description

Helper base class to host HAVING, ORDER BY and GROUP BY subquery nodes

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Member Function Documentation

virtual bool opt_explain_json_namespace::unit_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

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, opt_explain_json_namespace::sort_with_subqueries_ctx, opt_explain_json_namespace::join_ctx, and opt_explain_json_namespace::union_result_ctx.

bool opt_explain_json_namespace::unit_ctx::has_no_subqueries

(

)

const [inline]

Helper function to distinguish subquery-less nodes

Return values:

true	Node hosts no subqueries
false	Node hosts some subqueries

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

• opt_explain_json.cc