opt_explain_json_namespace::union_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::union_ctx:

List of all members.

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)

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Detailed Description

Node class for UNION (query expression)

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Member Function Documentation

virtual bool opt_explain_json_namespace::union_ctx::add_query_spec

(

context *

ctx

)

[inline, virtual]

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.

virtual size_t opt_explain_json_namespace::union_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

Returns:

"Select number" that is associated with this node

Implements opt_explain_json_namespace::context.

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

• opt_explain_json.cc