#include <sql_cmd_dml.h>

Inheritance diagram for Sql_cmd_dml:

Public Member Functions
virtual bool	is_data_change_stmt () const

bool	prepare (THD *thd) override
	Command-specific resolving (doesn't include LEX::prepare()) More...

bool	execute (THD *thd) override
	Execute a DML statement. More...

bool	is_dml () const override

virtual bool	may_use_cursor () const

bool	is_single_table_plan () const override

Query_result *	query_result () const

void	set_query_result (Query_result *result)
	Set query result object for this query statement. More...

void	set_lazy_result ()
	Signal that root result object needs preparing in next execution. More...

Public Member Functions inherited from Sql_cmd
virtual enum_sql_command	sql_command_code () const =0
	Return the command code for this statement. More...

bool	needs_explicit_preparation () const

bool	is_regular () const

bool	is_prepared () const

virtual void	cleanup (THD *)
	Command-specific reinitialization before execution of prepared statement. More...

void	set_owner (Prepared_statement *stmt)
	Set the owning prepared statement. More...

Prepared_statement *	owner () const
	Get the owning prepared statement. More...

void	set_as_part_of_sp ()
	Mark statement as part of procedure. More...

bool	is_part_of_sp () const

virtual bool	accept (THD , Select_lex_visitor )

virtual const MYSQL_LEX_CSTRING *	eligible_secondary_storage_engine () const
	Is this statement of a type and on a form that makes it eligible for execution in a secondary storage engine? 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 handlerton *	secondary_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...

void	set_optional_transform_prepared (bool value)

bool	is_optional_transform_prepared ()

Protected Member Functions
	Sql_cmd_dml ()

bool	is_empty_query () const

void	set_empty_query ()
	Set statement as returning no data. More...

virtual bool	precheck (THD *thd)=0
	Perform a precheck of table privileges for the specific operation. More...

virtual bool	check_privileges (THD *thd)=0
	Check privileges on a prepared statement, called at start of execution of the statement. More...

bool	check_all_table_privileges (THD *thd)
	Read and check privileges for all tables in a DML statement. More...

virtual bool	prepare_inner (THD *thd)=0
	Perform the command-specific parts of DML command preparation, to be called from prepare() More...

virtual bool	execute_inner (THD *thd)
	The inner parts of query optimization and execution. More...

virtual bool	restore_cmd_properties (THD *thd)
	Restore command properties before execution. More...

virtual bool	save_cmd_properties (THD *thd)
	Save command properties, such as prepared query details and table props. More...

const MYSQL_LEX_CSTRING *	get_eligible_secondary_engine () const
	Helper function that checks if the command is eligible for secondary engine and if that's true returns the name of that eligible secondary storage engine. More...

Protected Member Functions inherited from Sql_cmd
	Sql_cmd ()

virtual	~Sql_cmd ()

void	set_prepared ()
	Set this statement as prepared. More...

Protected Attributes
LEX *	lex
	Pointer to LEX for this statement. More...

Query_result *	result
	Pointer to object for handling of the result. More...

bool	m_empty_query
	True if query will produce no rows. More...

bool	m_lazy_result
	True: prepare query result on next execution. More...

Constructor & Destructor Documentation

◆ Sql_cmd_dml()

Sql_cmd_dml::Sql_cmd_dml ( )

inlineprotected

Member Function Documentation

◆ check_privileges()

virtual bool Sql_cmd_dml::check_privileges ( THD * thd )

protectedpure virtual

Check privileges on a prepared statement, called at start of execution of the statement.

Check that user has all relevant privileges to the statement, ie. INSERT privilege for columns inserted into, UPDATE privilege for columns that are updated, DELETE privilege for tables that are deleted from, SELECT privilege for columns that are referenced, etc.

Parameters

thd	thread handler

Returns: false if success, true if false

Implemented in Sql_cmd_show, Sql_cmd_call, Sql_cmd_delete, Sql_cmd_insert_base, Sql_cmd_select, Sql_cmd_show_schema_base, Sql_cmd_show_table_base, Sql_cmd_show_routine_code, Sql_cmd_show_binlog_events, Sql_cmd_show_binlogs, Sql_cmd_show_create_database, Sql_cmd_show_create_event, Sql_cmd_show_create_function, Sql_cmd_show_create_procedure, Sql_cmd_show_create_table, Sql_cmd_show_create_trigger, Sql_cmd_show_create_user, Sql_cmd_show_databases, Sql_cmd_show_engine_logs, Sql_cmd_show_engine_mutex, Sql_cmd_show_engine_status, Sql_cmd_show_events, Sql_cmd_show_grants, Sql_cmd_show_master_status, Sql_cmd_show_processlist, Sql_cmd_show_relaylog_events, Sql_cmd_show_replicas, Sql_cmd_show_replica_status, and Sql_cmd_update.

◆ is_data_change_stmt()

virtual bool Sql_cmd_dml::is_data_change_stmt ( ) const

inlinevirtual

Returns: true if data change statement, false if not (SELECT statement)

Reimplemented in Sql_cmd_call, and Sql_cmd_select.

◆ is_dml()

bool Sql_cmd_dml::is_dml ( ) const

inlineoverridevirtual

Returns: true if SQL command is a DML statement

Reimplemented from Sql_cmd.

◆ is_empty_query()

bool Sql_cmd_dml::is_empty_query ( ) const

inlineprotected

Returns: true if query is guaranteed to return no data

◆ is_single_table_plan()

bool Sql_cmd_dml::is_single_table_plan ( ) const

inlineoverridevirtual

Returns: true if implemented as single table plan, DML statement only

Reimplemented from Sql_cmd.

Reimplemented in Sql_cmd_delete, Sql_cmd_insert_values, and Sql_cmd_update.

◆ may_use_cursor()

virtual bool Sql_cmd_dml::may_use_cursor ( ) const

inlinevirtual

Reimplemented in Sql_cmd_select.

◆ precheck()

virtual bool Sql_cmd_dml::precheck ( THD * thd )

protectedpure virtual

Perform a precheck of table privileges for the specific operation.

Check that user has some relevant privileges for all tables involved in the statement, e.g. SELECT privileges for tables selected from, INSERT privileges for tables inserted into, etc. This function will also populate Table_ref::grant with all privileges the user has for each table, which is later used during checking of column privileges. Note that at preparation time, views are not expanded yet. Privilege checking is thus rudimentary and must be complemented with later calls to Query_block::check_view_privileges(). The reason to call this function at such an early stage is to be able to quickly reject statements for which the user obviously has insufficient privileges. This function is called before preparing the statement. The function must also be complemented with proper privilege checks for all involved columns (e.g. check_column_grant_*).

See also: also the function comment of Query_block::prepare(). During execution of a prepared statement, call check_privileges() instead.

Parameters

thd	thread handler

Returns: false if success, true if false

Implemented in Sql_cmd_call, Sql_cmd_delete, Sql_cmd_insert_base, Sql_cmd_select, Sql_cmd_show, and Sql_cmd_update.

◆ prepare_inner()

virtual bool Sql_cmd_dml::prepare_inner ( THD * thd )

protectedpure virtual

Perform the command-specific parts of DML command preparation, to be called from prepare()

Parameters

thd	the current thread

Returns: false if success, true if error

Implemented in Sql_cmd_call, Sql_cmd_delete, Sql_cmd_insert_base, Sql_cmd_select, and Sql_cmd_update.

◆ set_empty_query()

void Sql_cmd_dml::set_empty_query ( )

inlineprotected

Set statement as returning no data.

◆ set_lazy_result()

void Sql_cmd_dml::set_lazy_result ( )

inline

Signal that root result object needs preparing in next execution.

Member Data Documentation

◆ lex

LEX* Sql_cmd_dml::lex

protected

Pointer to LEX for this statement.

◆ m_empty_query

bool Sql_cmd_dml::m_empty_query

protected

True if query will produce no rows.

◆ m_lazy_result

bool Sql_cmd_dml::m_lazy_result

protected

True: prepare query result on next execution.

◆ result

Query_result* Sql_cmd_dml::result

protected

Pointer to object for handling of the result.

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

sql/sql_cmd_dml.h
sql/sql_select.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

◆ Sql_cmd_dml()

Member Function Documentation

◆ check_privileges()

◆ is_data_change_stmt()

◆ is_dml()

◆ is_empty_query()

◆ is_single_table_plan()

◆ may_use_cursor()

◆ precheck()

◆ prepare_inner()

◆ set_empty_query()

◆ set_lazy_result()

Member Data Documentation

◆ lex

◆ m_empty_query

◆ m_lazy_result

◆ result