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opt_explain_json_namespace::simple_sort_ctx Class Reference
Inheritance diagram for opt_explain_json_namespace::simple_sort_ctx:
opt_explain_json_namespace::joinable_ctx opt_explain_json_namespace::context Explain_context Sql_alloc opt_explain_json_namespace::simple_sort_with_subqueries_ctx

List of all members.

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


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

Add a CTX_JOIN_TAB node to a CTX_JOIN node

ctxCTX_JOIN_TAB node
Return values:

Reimplemented from opt_explain_json_namespace::context.

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

ctxContext of WHERE subquery
subqueryFor CTX_JOIN_TAB: match given unit with a previously collected by the register_where_subquery function.

Reimplemented from opt_explain_json_namespace::context.

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

subqueryDerived subquery node
Return values:
falseCan't associate: this node or its child nodes are not derived from the subquery

Reimplemented from opt_explain_json_namespace::context.

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

objObject of this body
Return values:

Implements opt_explain_json_namespace::context.

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

hideif true, ban the output of K_SELECT_ID JSON property in the underlying table_with_where_and_derived_ctx objects
"Select number" that is associated with this node

Implements opt_explain_json_namespace::context.

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