Clean up table_name_t

row_is_mysql_tmp_table_name(): Replaced with
dict_table_t::is_temporary_name() and table_name_t::is_temporary().

table_name_t: Add constructors.

storage/innobase/dict/dict0load.cc

 /*****************************************************************************
 
 Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2016, 2018, MariaDB Corporation.
+Copyright (c) 2016, 2019, 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
@@ -81,7 +81,7 @@ file_unreadable flag in the table object we return */
 static
 dict_table_t*
 dict_load_table_one(
-	table_name_t&		name,
+	const table_name_t&	name,
 	bool			cached,
 	dict_err_ignore_t	ignore_err,
 	dict_names_t&		fk_tables);
@@ -93,9 +93,8 @@ Do not load any columns or indexes.
 @param[out,own]	table	table, or NULL
 @return	error message
 @retval	NULL on success */
-static
-const char*
-dict_load_table_low(table_name_t& name, const rec_t* rec, dict_table_t** table)
+static const char* dict_load_table_low(const table_name_t& name,
+				       const rec_t* rec, dict_table_t** table)
 	MY_ATTRIBUTE((nonnull, warn_unused_result));
 
 /** Load an index definition from a SYS_INDEXES record to dict_index_t.
@@ -392,7 +391,6 @@ dict_process_sys_tables_rec_and_mtr_commit(
 	ulint		len;
 	const char*	field;
 	const char*	err_msg = NULL;
-	table_name_t	table_name;
 
 	field = (const char*) rec_get_nth_field_old(
 		rec, DICT_FLD__SYS_TABLES__NAME, &len);
@@ -402,7 +400,7 @@ dict_process_sys_tables_rec_and_mtr_commit(
 	ut_ad(mtr_memo_contains_page(mtr, rec, MTR_MEMO_PAGE_S_FIX));
 
 	/* Get the table name */
-	table_name.m_name = mem_heap_strdupl(heap, field, len);
+	table_name_t table_name(mem_heap_strdupl(heap, field, len));
 
 	/* If DICT_TABLE_LOAD_FROM_CACHE is set, first check
 	whether there is cached dict_table_t struct */
@@ -1397,7 +1395,6 @@ dict_check_sys_tables(
 	     rec = dict_getnext_system(&pcur, &mtr)) {
 		const byte*	field;
 		ulint		len;
-		table_name_t	table_name;
 		table_id_t	table_id;
 		ulint		space_id;
 		ulint		n_cols;
@@ -1413,7 +1410,8 @@ dict_check_sys_tables(
 		/* Copy the table name from rec */
 		field = rec_get_nth_field_old(
 			rec, DICT_FLD__SYS_TABLES__NAME, &len);
-		table_name.m_name = mem_strdupl((char*) field, len);
+
+		table_name_t table_name(mem_strdupl((char*) field, len));
 		DBUG_PRINT("dict_check_sys_tables",
 			   ("name: %p, '%s'", table_name.m_name,
 			    table_name.m_name));
@@ -2660,9 +2658,8 @@ Do not load any columns or indexes.
 @param[out,own]	table	table, or NULL
 @return	error message
 @retval	NULL on success */
-static
-const char*
-dict_load_table_low(table_name_t& name, const rec_t* rec, dict_table_t** table)
+static const char* dict_load_table_low(const table_name_t& name,
+				       const rec_t* rec, dict_table_t** table)
 {
 	table_id_t	table_id;
 	ulint		space_id;
@@ -2792,32 +2789,22 @@ dict_load_table(
 	dict_names_t			fk_list;
 	dict_table_t*			result;
 	dict_names_t::iterator		i;
-	table_name_t			table_name;
 
 	DBUG_ENTER("dict_load_table");
 	DBUG_PRINT("dict_load_table", ("loading table: '%s'", name));
 
 	ut_ad(mutex_own(&dict_sys->mutex));
 
-	table_name.m_name = const_cast<char*>(name);
-
 	result = dict_table_check_if_in_cache_low(name);
 
 	if (!result) {
-		result = dict_load_table_one(table_name, cached, ignore_err,
-					     fk_list);
+		result = dict_load_table_one(const_cast<char*>(name),
+					     cached, ignore_err, fk_list);
 		while (!fk_list.empty()) {
-			table_name_t	fk_table_name;
-			dict_table_t*	fk_table;
-
-			fk_table_name.m_name =
-				const_cast<char*>(fk_list.front());
-			fk_table = dict_table_check_if_in_cache_low(
-				fk_table_name.m_name);
-			if (!fk_table) {
-				dict_load_table_one(fk_table_name, cached,
-						    ignore_err, fk_list);
-			}
+			if (!dict_table_check_if_in_cache_low(fk_list.front()))
+				dict_load_table_one(
+					const_cast<char*>(fk_list.front()),
+					cached, ignore_err, fk_list);
 			fk_list.pop_front();
 		}
 	}
@@ -2917,7 +2904,7 @@ file_unreadable flag in the table object we return */
 static
 dict_table_t*
 dict_load_table_one(
-	table_name_t&		name,
+	const table_name_t&	name,
 	bool			cached,
 	dict_err_ignore_t	ignore_err,
 	dict_names_t&		fk_tables)

storage/innobase/handler/ha_innodb.cc

@@ -13208,10 +13208,8 @@ inline int ha_innobase::delete_table(const char* name, enum_sql_command sqlcom)
 		err = row_drop_database_for_mysql(norm_name, trx,
 			&num_partitions);
 		norm_name[len] = 0;
-		if (num_partitions == 0
-		    && !row_is_mysql_tmp_table_name(norm_name)) {
-			table_name_t tbl_name;
-			tbl_name.m_name = norm_name;
+		table_name_t tbl_name(norm_name);
+		if (num_partitions == 0 && !tbl_name.is_temporary()) {
 			ib::error() << "Table " << tbl_name <<
 				" does not exist in the InnoDB"
 				" internal data dictionary though MariaDB is"

storage/innobase/handler/handler0alter.cc

@@ -7449,13 +7449,11 @@ innobase_update_foreign_cache(
 			fk_tables.front(), true, DICT_ERR_IGNORE_NONE);
 
 		if (table == NULL) {
-			table_name_t	table_name;
-			table_name.m_name = const_cast<char*>(
-						fk_tables.front());
-
 			err = DB_TABLE_NOT_FOUND;
 			ib::error()
-				<< "Failed to load table '" << table_name
+				<< "Failed to load table '"
+				<< table_name_t(const_cast<char*>
+						(fk_tables.front()))
 				<< "' which has a foreign key constraint with"
 				<< " table '" << user_table->name << "'.";
 			break;

storage/innobase/include/dict0crea.ic

@@ -28,18 +28,6 @@ Created 1/8/1996 Heikki Tuuri
 
 #include "mem0mem.h"
 
-/*********************************************************************//**
-Checks if a table name contains the string "/#sql" which denotes temporary
-tables in MySQL.
-@return true if temporary table */
-bool
-row_is_mysql_tmp_table_name(
-/*========================*/
-	const char*     name) MY_ATTRIBUTE((warn_unused_result));
-				/*!< in: table name in the form
-				'database/tablename' */
-
-
 /********************************************************************//**
 Generate a foreign key constraint name when it was not named by the user.
 A generated constraint has a name of the format dbname/tablename_ibfk_NUMBER,
@@ -63,7 +51,7 @@ dict_create_add_foreign_id(
 					mem_heap_alloc(foreign->heap,
 						       namelen + 20));
 
-		if (row_is_mysql_tmp_table_name(name)) {
+		if (dict_table_t::is_temporary_name(name)) {
 
 			/* no overflow if number < 1e13 */
 			sprintf(id, "%s_ibfk_%lu", name,

storage/innobase/include/dict0mem.h

@@ -559,6 +559,11 @@ struct table_name_t
 	/** The name in internal representation */
 	char*	m_name;
 
+	/** Default constructor */
+	table_name_t() {}
+	/** Constructor */
+	table_name_t(char* name) : m_name(name) {}
+
 	/** @return the end of the schema name */
 	const char* dbend() const
 	{
@@ -581,6 +586,9 @@ struct table_name_t
 	@return the partition name
 	@retval	NULL	if the table is not partitioned */
 	const char* part() const { return strstr(basename(), part_suffix); }
+
+	/** @return whether this is a temporary or intermediate table name */
+	inline bool is_temporary() const;
 };
 
 /** Data structure for a column in a table */
@@ -1401,6 +1409,13 @@ struct dict_table_t {
 		return(UNIV_LIKELY(!file_unreadable));
 	}
 
+	/** Check if a table name contains the string "/#sql"
+	which denotes temporary or intermediate tables in MariaDB. */
+	static bool is_temporary_name(const char* name)
+	{
+		return strstr(name, "/" TEMP_FILE_PREFIX) != NULL;
+	}
+
 	/** Id of the table. */
 	table_id_t				id;
 	/** Hash chain node. */
@@ -1770,6 +1785,11 @@ struct dict_table_t {
 	dict_vcol_templ_t*			vc_templ;
 };
 
+inline bool table_name_t::is_temporary() const
+{
+	return dict_table_t::is_temporary_name(m_name);
+}
+
 inline bool dict_index_t::is_readable() const
 {
 	return(UNIV_LIKELY(!table->file_unreadable));

storage/innobase/include/row0mysql.h

 /*****************************************************************************
 
 Copyright (c) 2000, 2017, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2017, 2018, MariaDB Corporation.
+Copyright (c) 2017, 2019, 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
@@ -275,17 +275,6 @@ row_unlock_for_mysql(
 	row_prebuilt_t*	prebuilt,
 	ibool		has_latches_on_recs);
 
-/*********************************************************************//**
-Checks if a table name contains the string "/#sql" which denotes temporary
-tables in MySQL.
-@return true if temporary table */
-bool
-row_is_mysql_tmp_table_name(
-/*========================*/
-	const char*	name) MY_ATTRIBUTE((warn_unused_result));
-				/*!< in: table name in the form
-				'database/tablename' */
-
 /*********************************************************************//**
 Creates an query graph node of 'update' type to be used in the MySQL
 interface.

storage/innobase/row/row0mysql.cc

@@ -3966,7 +3966,7 @@ row_drop_database_for_mysql(
 
 		}
 
-		if (!row_is_mysql_tmp_table_name(table->name.m_name)) {
+		if (!table->name.is_temporary()) {
 			/* There could be orphan temp tables left from
 			interrupted alter table. Leave them, and handle
 			the rest.*/
@@ -4060,21 +4060,6 @@ row_drop_database_for_mysql(
 	DBUG_RETURN(err);
 }
 
-/*********************************************************************//**
-Checks if a table name contains the string "/#sql" which denotes temporary
-tables in MySQL.
-@return true if temporary table */
-MY_ATTRIBUTE((warn_unused_result))
-bool
-row_is_mysql_tmp_table_name(
-/*========================*/
-	const char*	name)	/*!< in: table name in the form
-				'database/tablename' */
-{
-	return(strstr(name, "/" TEMP_FILE_PREFIX) != NULL);
-	/* return(strstr(name, "/@0023sql") != NULL); */
-}
-
 /****************************************************************//**
 Delete a single constraint.
 @return error code or DB_SUCCESS */
@@ -4174,8 +4159,8 @@ row_rename_table_for_mysql(
 
 	trx->op_info = "renaming table";
 
-	old_is_tmp = row_is_mysql_tmp_table_name(old_name);
-	new_is_tmp = row_is_mysql_tmp_table_name(new_name);
+	old_is_tmp = dict_table_t::is_temporary_name(old_name);
+	new_is_tmp = dict_table_t::is_temporary_name(new_name);
 
 	dict_locked = trx->dict_operation_lock_mode == RW_X_LATCH;