MySQL  8.0.19
Source Code Documentation
opt_explain_json_namespace::joinable_ctx Class Reference

Base for CTX_QEP_TAB, CTX_DUPLICATES_WEEDOUT and CTX_MATERIALIZATION nodes. More...

Inheritance diagram for opt_explain_json_namespace::joinable_ctx:
opt_explain_json_namespace::context Explain_context opt_explain_json_namespace::duplication_weedout_ctx opt_explain_json_namespace::join_tab_ctx opt_explain_json_namespace::materialize_ctx opt_explain_json_namespace::message_ctx opt_explain_json_namespace::simple_sort_ctx opt_explain_json_namespace::simple_sort_with_subqueries_ctx

Public Member Functions

 joinable_ctx (enum_parsing_context type_arg, const char *name_arg, context *parent_arg)
 
- Public Member Functions inherited from opt_explain_json_namespace::context
 context (enum_parsing_context type_arg, const char *name_arg, context *parent_arg)
 
virtual ~context ()
 
virtual bool format (Opt_trace_context *json)
 Pass the node with its child nodes to a JSON formatter. More...
 
bool is_query_block () const
 
virtual size_t id (bool hide=false)=0
 Analogue of the "id" column in the traditional EXPLAIN output. More...
 
virtual bool cacheable ()
 
virtual bool dependent ()
 
virtual class qep_rowentry ()
 
virtual enum_mod_type get_mod_type ()
 
virtual void set_child (context *)
 Associate a child node with this node. More...
 
virtual void set_union_result (union_result_ctx *)
 associate CTX_UNION_RESULT node with CTX_UNION node More...
 
virtual bool add_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
 Append a subquery node to the specified list of the unit node. More...
 
virtual bool format_nested_loop (Opt_trace_context *json)
 Format nested loop join subtree (if any) to JSON formatter. More...
 
virtual bool add_join_tab (joinable_ctx *ctx)
 Add a CTX_QEP_TAB node to a CTX_JOIN node. More...
 
virtual void set_sort (sort_ctx *ctx)
 Set nested ORDER BY/GROUP BY/DISTINCT node to ctx. More...
 
virtual void set_window (window_ctx *ctx)
 Set nested WINDOW node to ctx. More...
 
virtual bool add_query_spec (context *ctx)
 Add a query specification node to the CTX_UNION node. More...
 
virtual bool find_and_set_derived (context *subquery)
 Try to associate a derived subquery node with this or underlying node. More...
 
virtual int add_where_subquery (subquery_ctx *ctx, SELECT_LEX_UNIT *subquery)
 Associate WHERE subqueries of given context and unit with this object. More...
 
virtual bool format_derived (Opt_trace_context *)
 Helper function to format output for derived subquery if any. More...
 
virtual bool format_where (Opt_trace_context *)
 Helper function to format output for associated WHERE subqueries if any. More...
 
virtual bool format_unit (Opt_trace_context *)
 Helper function to format output for HAVING, ORDER/GROUP BY subqueries. More...
 
- Public Member Functions inherited from Explain_context
 Explain_context (enum_parsing_context type_arg)
 

Additional Inherited Members

- Public Attributes inherited from opt_explain_json_namespace::context
contextparent
 link to parent node or NULL More...
 
- Public Attributes inherited from Explain_context
enum_parsing_context type
 type tag More...
 
- Protected Attributes inherited from opt_explain_json_namespace::context
const char * name
 

Detailed Description

Base for CTX_QEP_TAB, CTX_DUPLICATES_WEEDOUT and CTX_MATERIALIZATION nodes.

This class implements a base to explain individual JOIN_TABs as well as JOIN_TAB groups like in semi-join materialization.

Constructor & Destructor Documentation

◆ joinable_ctx()

opt_explain_json_namespace::joinable_ctx::joinable_ctx ( enum_parsing_context  type_arg,
const char *  name_arg,
context parent_arg 
)
inline

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