opt_explain_json_namespace::join_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::join_ctx:

List of all members.

Public Member Functions
	join_ctx (Explain_context_enum type_arg, const char *name_arg, context *parent_arg)
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_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
virtual bool	format_nested_loop (Opt_trace_context *json)
virtual size_t	id (bool hide)
virtual bool	cacheable ()
virtual bool	dependent ()
virtual bool	add_where_subquery (subquery_ctx *ctx, SELECT_LEX_UNIT *subquery)
Protected Member Functions
virtual bool	format_body (Opt_trace_context *json, Opt_trace_object *obj)
Protected Attributes
List< joinable_ctx >	join_tabs
	hosted JOIN_TAB nodes
sort_ctx *	sort

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Detailed Description

Node class for the CTX_JOIN context

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Member Function Documentation

virtual bool opt_explain_json_namespace::join_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

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

bool opt_explain_json_namespace::join_ctx::add_subquery	(	subquery_list_enum	subquery_type,
		subquery_ctx *	ctx
	)		[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::unit_ctx.

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

bool opt_explain_json_namespace::join_ctx::add_where_subquery	(	subquery_ctx *	ctx,
		SELECT_LEX_UNIT *	subquery
	)		[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.

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

bool opt_explain_json_namespace::join_ctx::find_and_set_derived

(

context *

subquery

)

[virtual]

Associate a CTX_DERIVED node with its CTX_JOIN_TAB node

Parameters:

subquery

derived subquery tree

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

bool opt_explain_json_namespace::join_ctx::format_body	(	Opt_trace_context *	json,
		Opt_trace_object *	obj
	)		[protected, virtual]

Format JSON object body

Parameters:

json	Formatter
obj	Object of this body

Return values:

false	Ok
true	Error

Implements opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::sort_ctx.

bool opt_explain_json_namespace::join_ctx::format_nested_loop

(

Opt_trace_context *

json

)

[virtual]

Format nested loop join subtree (if any) to JSON formatter

Parameters:

json

Formatter

Return values:

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

size_t opt_explain_json_namespace::join_ctx::id

(

bool

hide

)

[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.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

virtual void opt_explain_json_namespace::join_ctx::set_sort

(

sort_ctx *

ctx

)

[inline, virtual]

Set nested ORDER BY/GROUP BY/DISTINCT node to ctx

Parameters:

json

Formatter

Return values:

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::context.

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, and opt_explain_json_namespace::materialize_ctx.

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

• opt_explain_json.cc