opt_explain_json_namespace::sort_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::sort_ctx:

Collaboration diagram for opt_explain_json_namespace::sort_ctx:

Public Member Functions
	sort_ctx (Explain_context_enum type_arg, const char *name_arg, context *parent_arg, const Explain_format_flags *flags, Explain_sort_clause clause)
Public Member Functions inherited from opt_explain_json_namespace::join_ctx
	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)
Public Member Functions inherited from opt_explain_json_namespace::unit_ctx
	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.
Public Member Functions inherited from opt_explain_json_namespace::context
	context (Explain_context_enum type_arg, const char *name_arg, context *parent_arg)
virtual bool	format (Opt_trace_context *json)
bool	is_query_block () const
virtual class qep_row *	entry ()
virtual void	set_child (context *child)
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)
virtual bool	format_derived (Opt_trace_context *json)
	Helper function to format output for derived subquery if any.
virtual bool	format_where (Opt_trace_context *json)
	Helper function to format output for associated WHERE subqueries if any.
Public Member Functions inherited from Explain_context
	Explain_context (Explain_context_enum type_arg)

Protected Member Functions
virtual bool	format_body (Opt_trace_context *json, Opt_trace_object *obj)

Additional Inherited Members
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, size_t size)
Public Attributes inherited from opt_explain_json_namespace::context
context *	parent
	link to parent node or NULL
Protected Attributes inherited from opt_explain_json_namespace::join_ctx
List< joinable_ctx >	join_tabs
	hosted JOIN_TAB nodes
sort_ctx *	sort

Detailed Description

Node class for CTX_SIMPLE_ORDER_BY, CTX_SIMPLE_GROUP_BY and CTX_SIMPLE_DISTINCT

CTX_JOIN context (see join_ctx class) may contain nested loop join node or ORDER BY/GROUP BY/DISTINCT node that is represented by this class:

join: { nested_loop: [ ... ] } or join: { order_by|group_by|distinct : { ... } }

CTX_ORDER_BY may contain nested loop join tree or GROUP BY/DISTINCT node:

order_by: { nested_loop|group_by|distinct: ... }

CTX_DISTINCT context structure:

distinct: { nested_loop|group_by: ... }

CTX_GROUP_BY:

group_by: { nested_loop: [ ... ] }

I.e. the most complex CTX_JOIN may have such a structure of JSON output as:

join: { order_by: { distinct: { group_by: { nested_loop: [ ... ] } } } } TODO

Definition at line 1105 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::sort_ctx::format_body ( Opt_trace_context *  json, Opt_trace_object *  obj  )

inlineprotectedvirtual

Format JSON object body

Parameters

json	Formatter
obj	Object of this body

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1122 of file opt_explain_json.cc.

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

• sql/opt_explain_json.cc