MDEV-28004 ha_innobase::reset_auto_increment() is never executed

The virtual member function handler::reset_auto_increment(ulonglong)
is only ever invoked by the default implementation of the virtual
member function handler::truncate().

Because ha_innobase::truncate() overrides handler::truncate() without
ever invoking handler::truncate(), some InnoDB member functions are
never called.

ha_innobase::innobase_reset_autoinc(), ha_innobase::reset_auto_increment():
Removed (unreachable code).

ha_innobase::delete_all_rows(): Removed. The default implementation
handler::delete_all_rows() works just as fine.

storage/innobase/handler/ha_innodb.cc

@@ -2702,64 +2702,6 @@ innobase_next_autoinc(
 	return(~(ulonglong) 0);
 }
 
-/********************************************************************//**
-Reset the autoinc value in the table.
-@return	DB_SUCCESS if all went well else error code */
-UNIV_INTERN
-dberr_t
-ha_innobase::innobase_reset_autoinc(
-/*================================*/
-	ulonglong	autoinc)	/*!< in: value to store */
-{
-	dberr_t		error;
-
-	error = innobase_lock_autoinc();
-
-	if (error == DB_SUCCESS) {
-
-		dict_table_autoinc_initialize(m_prebuilt->table, autoinc);
-
-		dict_table_autoinc_unlock(m_prebuilt->table);
-	}
-
-	return(error);
-}
-
-/*******************************************************************//**
-Reset the auto-increment counter to the given value, i.e. the next row
-inserted will get the given value. This is called e.g. after TRUNCATE
-is emulated by doing a 'DELETE FROM t'. HA_ERR_WRONG_COMMAND is
-returned by storage engines that don't support this operation.
-@return	0 or error code */
-UNIV_INTERN
-int
-ha_innobase::reset_auto_increment(
-/*==============================*/
-	ulonglong	value)		/*!< in: new value for table autoinc */
-{
-	DBUG_ENTER("ha_innobase::reset_auto_increment");
-
-	dberr_t	error;
-
-	update_thd(ha_thd());
-
-	error = row_lock_table_autoinc_for_mysql(m_prebuilt);
-
-	if (error != DB_SUCCESS) {
-		DBUG_RETURN(convert_error_code_to_mysql(
-				    error, m_prebuilt->table->flags, m_user_thd));
-	}
-
-	/* The next value can never be 0. */
-	if (value == 0) {
-		value = 1;
-	}
-
-	innobase_reset_autoinc(value);
-
-	DBUG_RETURN(0);
-}
-
 /*********************************************************************//**
 Initializes some fields in an InnoDB transaction object. */
 static
@@ -9119,16 +9061,6 @@ ha_innobase::delete_row(
 			    error, m_prebuilt->table->flags, m_user_thd));
 }
 
-/** Delete all rows from the table.
-@return error number or 0 */
-
-int
-ha_innobase::delete_all_rows()
-{
-	DBUG_ENTER("ha_innobase::delete_all_rows");
-	DBUG_RETURN(HA_ERR_WRONG_COMMAND);
-}
-
 /**********************************************************************//**
 Removes a new lock set on a row, if it was not read optimistically. This can
 be called after a row has been read in the processing of an UPDATE or a DELETE

storage/innobase/handler/ha_innodb.h

 /*****************************************************************************
 
 Copyright (c) 2000, 2017, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2013, 2021, MariaDB Corporation.
+Copyright (c) 2013, 2022, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -113,8 +113,6 @@ class ha_innobase: public handler
 
 	double read_time(uint index, uint ranges, ha_rows rows);
 
-	int delete_all_rows();
-
 	int write_row(uchar * buf);
 
 	int update_row(const uchar * old_data, const uchar * new_data);
@@ -253,7 +251,6 @@ class ha_innobase: public handler
 		ulonglong		nb_desired_values,
 		ulonglong*		first_value,
 		ulonglong*		nb_reserved_values);
-	int reset_auto_increment(ulonglong value);
 
 	virtual bool get_error_message(int error, String *buf);
 
@@ -441,7 +438,6 @@ class ha_innobase: public handler
 	dberr_t innobase_lock_autoinc();
 	ulonglong innobase_peek_autoinc();
 	dberr_t innobase_set_max_autoinc(ulonglong auto_inc);
-	dberr_t innobase_reset_autoinc(ulonglong auto_inc);
 
 	/** Resets a query execution 'template'.
 	@see build_template() */