MySQL  8.0.19
Source Code Documentation
Sql_cmd_select Class Reference

#include <sql_select.h>

Inheritance diagram for Sql_cmd_select:
Sql_cmd_dml Sql_cmd Sql_cmd_do

Public Member Functions

 Sql_cmd_select (Query_result *result_arg)
enum_sql_command sql_command_code () const override
 Return the command code for this statement. More...
bool is_data_change_stmt () const override
bool accept (THD *thd, Select_lex_visitor *visitor) override
const MYSQL_LEX_CSTRINGeligible_secondary_storage_engine () const override
 Is this statement of a type and on a form that makes it eligible for execution in a secondary storage engine? More...
- Public Member Functions inherited from Sql_cmd_dml
virtual bool prepare (THD *thd)
 Command-specific resolving (doesn't include LEX::prepare()) More...
virtual bool execute (THD *thd)
 Execute this query once. More...
virtual bool is_dml () const
virtual bool is_single_table_plan () const
- Public Member Functions inherited from Sql_cmd
bool is_prepared () const
virtual void cleanup (THD *thd)
 Command-specific reinitialization before execution of prepared statement. More...
void set_owner (Prepared_statement *stmt)
 Set the owning prepared statement. More...
Prepared_statementget_owner ()
 Get the owning prepared statement. More...
virtual void unprepare (THD *thd)
 Temporary function used to "unprepare" a prepared statement after preparation, so that a subsequent execute statement will reprepare it. More...
void disable_secondary_storage_engine ()
 Disable use of secondary storage engines in this statement. More...
bool secondary_storage_engine_disabled () const
 Has use of secondary storage engines been disabled for this statement? More...
void use_secondary_storage_engine (const handlerton *hton)
 Mark the current statement as using a secondary storage engine. More...
bool using_secondary_storage_engine () const
 Is this statement using a secondary storage engine? More...
const handlertonsecondary_engine () const
 Get the handlerton of the secondary engine that is used for executing this statement, or nullptr if a secondary engine is not used. More...

Protected Member Functions

bool precheck (THD *thd) override
 Perform an authorization precheck for a SELECT statement. More...
bool prepare_inner (THD *thd) override
 Prepare a SELECT statement. More...
- Protected Member Functions inherited from Sql_cmd_dml
 Sql_cmd_dml ()
bool is_empty_query () const
void set_empty_query ()
 Set statement as returning no data. More...
virtual bool execute_inner (THD *thd)
 The inner parts of query optimization and execution. More...
- Protected Member Functions inherited from Sql_cmd
 Sql_cmd ()
virtual ~Sql_cmd ()
bool needs_explicit_preparation () const
void set_prepared ()
 Set this statement as prepared. More...

Additional Inherited Members

- Protected Attributes inherited from Sql_cmd_dml
 Pointer to LEX for this statement. More...
 Pointer to object for handling of the result. More...
bool m_empty_query
 True if query will produce no rows. More...
- Protected Attributes inherited from Sql_cmd
bool prepare_only

Constructor & Destructor Documentation

◆ Sql_cmd_select()

Sql_cmd_select::Sql_cmd_select ( Query_result result_arg)

Member Function Documentation

◆ is_data_change_stmt()

bool Sql_cmd_select::is_data_change_stmt ( ) const
true if data change statement, false if not (SELECT statement)

Reimplemented from Sql_cmd_dml.

◆ sql_command_code()

enum_sql_command Sql_cmd_select::sql_command_code ( ) const

Return the command code for this statement.

Implements Sql_cmd.

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