Bug #16722314 FOREIGN KEY ID MODIFIED DURING EXPORT

Bug #16754901 PARS_INFO_FREE NOT CALLED IN DICT_CREATE_ADD_FOREIGN_TO_DICTIONARY

Problem:

There are two situations here.  The constraint name is explicitly
given by the user and the constraint name is automatically generated
by InnoDB.  In the case of generated constraint name, it is formed by
adding table name as prefix.  The table names are stored internally in
my_charset_filename.  In the case of constraint name explicitly given
by the user, it is stored in UTF8 format itself.  So, in some
situations the constraint name is in utf8 and in some situations it is
in my_charset_filename format.  Hence this problem.

Solution:

Always store the foreign key constraint name in UTF-8 even when
automatically generated.

Bug #16754901 PARS_INFO_FREE NOT CALLED IN DICT_CREATE_ADD_FOREIGN_TO_DICTIONARY

Problem:

There was a memory leak in the function dict_create_add_foreign_to_dictionary().
The allocated pars_info_t object is not freed in the error code path.

Solution:

Allocate the pars_info_t object after the error checking.

rb#2368 in review

storage/innobase/dict/dict0crea.c

@@ -27,6 +27,21 @@ Created 1/8/1996 Heikki Tuuri
 #include "ut0vec.h"
 #include "ha_prototypes.h"
 
+/*************************************************************************
+Checks if a table name contains the string TEMP_TABLE_PATH_PREFIX which
+denotes temporary tables in MySQL. */
+static
+ibool
+row_is_mysql_tmp_table_name(
+/*========================*/
+				/* out: TRUE if temporary table */
+	const char*     name)   /* in: table name in the form
+				'database/tablename' */
+{
+	return(strstr(name, TEMP_TABLE_PATH_PREFIX) != NULL);
+}
+
+
 /*********************************************************************
 Based on a table object, this function builds the entry to be inserted
 in the SYS_TABLES system table. */
@@ -1347,25 +1362,46 @@ dict_create_add_foreign_to_dictionary(
 {
 	ulint		error;
 	ulint		i;
-
-	pars_info_t*	info = pars_info_create();
+	pars_info_t*	info;
 
 	if (foreign->id == NULL) {
-		char*	stripped_name;
 		/* Generate a new constraint id */
 		ulint	namelen	= strlen(table->name);
 		char*	id	= mem_heap_alloc(foreign->heap, namelen + 20);
 		/* no overflow if number < 1e13 */
-		sprintf(id, "%s_ibfk_%lu", table->name, (ulong) (*id_nr)++);
-		foreign->id = id;
 
-		stripped_name = strchr(foreign->id, '/') + 1;
-		if (innobase_check_identifier_length(stripped_name)) {
-			fprintf(stderr, "InnoDB: Generated foreign key "
-				"name (%s) is too long\n", foreign->id);
+		if (row_is_mysql_tmp_table_name(table->name)) {
+			sprintf(id, "%s_ibfk_%lu", table->name,
+				(ulong) (*id_nr)++);
+		} else {
+			char table_name[MAX_TABLE_NAME_LEN + 20] = "";
+			uint errors = 0;
+
+			strncpy(table_name, table->name,
+				MAX_TABLE_NAME_LEN + 20);
+
+			innobase_convert_to_system_charset(
+				strchr(table_name, '/') + 1,
+				strchr(table->name, '/') + 1,
+				MAX_TABLE_NAME_LEN, &errors);
+
+			if (errors) {
+				strncpy(table_name, table->name,
+					MAX_TABLE_NAME_LEN + 20);
+			}
+
+			sprintf(id, "%s_ibfk_%lu", table_name,
+				(ulong) (*id_nr)++);
+
+			if (innobase_check_identifier_length(
+				strchr(id,'/') + 1)) {
 				return(DB_IDENTIFIER_TOO_LONG);
 			}
 		}
+		foreign->id = id;
+	}
+
+	info = pars_info_create();
 
 	pars_info_add_str_literal(info, "id", foreign->id);
 

storage/innobase/dict/dict0dict.c

@@ -1052,6 +1052,7 @@ dict_table_rename_in_cache(
 	foreign = UT_LIST_GET_FIRST(table->foreign_list);
 
 	while (foreign != NULL) {
+
 		if (ut_strlen(foreign->foreign_table_name)
 		    < ut_strlen(table->name)) {
 			/* Allocate a longer name buffer;
@@ -1065,34 +1066,115 @@ dict_table_rename_in_cache(
 		strcpy(foreign->foreign_table_name, table->name);
 
 		if (strchr(foreign->id, '/')) {
+			/* This is a >= 4.0.18 format id */
+
 			ulint	db_len;
 			char*	old_id;
+			char	old_name_cs_filename[MAX_TABLE_NAME_LEN+20];
+			uint	errors = 0;
+
+			/* All table names are internally stored in charset
+			my_charset_filename (except the temp tables and the
+			partition identifier suffix in partition tables). The
+			foreign key constraint names are internally stored
+			in UTF-8 charset.  The variable fkid here is used
+			to store foreign key constraint name in charset
+			my_charset_filename for comparison further below. */
+			char	fkid[MAX_TABLE_NAME_LEN+20];
+			ibool	on_tmp = FALSE;
+
+			/* The old table name in my_charset_filename is stored
+			in old_name_cs_filename */
+
+			strncpy(old_name_cs_filename, old_name,
+				MAX_TABLE_NAME_LEN);
+			if (strstr(old_name, TEMP_TABLE_PATH_PREFIX) == NULL) {
+
+				innobase_convert_to_system_charset(
+					strchr(old_name_cs_filename, '/') + 1,
+					strchr(old_name, '/') + 1,
+					MAX_TABLE_NAME_LEN, &errors);
+
+				if (errors) {
+					/* There has been an error to convert
+					old table into UTF-8.  This probably
+					means that the old table name is
+					actually in UTF-8. */
+					innobase_convert_to_filename_charset(
+						strchr(old_name_cs_filename,
+						       '/') + 1,
+						strchr(old_name, '/') + 1,
+						MAX_TABLE_NAME_LEN);
+				} else {
+					/* Old name already in
+					my_charset_filename */
+					strncpy(old_name_cs_filename, old_name,
+						MAX_TABLE_NAME_LEN);
+				}
+			}
 
-			/* This is a >= 4.0.18 format id */
+			strncpy(fkid, foreign->id, MAX_TABLE_NAME_LEN);
+
+			if (strstr(fkid, TEMP_TABLE_PATH_PREFIX) == NULL) {
+				innobase_convert_to_filename_charset(
+					strchr(fkid, '/') + 1,
+					strchr(foreign->id, '/') + 1,
+					MAX_TABLE_NAME_LEN+20);
+			} else {
+				on_tmp = TRUE;
+			}
 
 			old_id = mem_strdup(foreign->id);
 
-			if (ut_strlen(foreign->id) > ut_strlen(old_name)
+			if (ut_strlen(fkid) > ut_strlen(old_name_cs_filename)
 			    + ((sizeof dict_ibfk) - 1)
-			    && !memcmp(foreign->id, old_name,
-				       ut_strlen(old_name))
-			    && !memcmp(foreign->id + ut_strlen(old_name),
+			    && !memcmp(fkid, old_name_cs_filename,
+				       ut_strlen(old_name_cs_filename))
+			    && !memcmp(fkid + ut_strlen(old_name_cs_filename),
 				       dict_ibfk, (sizeof dict_ibfk) - 1)) {
 
+				char	table_name[MAX_TABLE_NAME_LEN] = "";
+				uint	errors = 0;
+
 				/* This is a generated >= 4.0.18 format id */
 
 				if (strlen(table->name) > strlen(old_name)) {
-					foreign->id = mem_heap_alloc(
+					foreign->id = mem_heap_zalloc(
 						foreign->heap,
 						strlen(table->name)
 						+ strlen(old_id) + 1);
 				}
 
+				/* Convert the table name to UTF-8 */
+				strncpy(table_name, table->name,
+					MAX_TABLE_NAME_LEN);
+				innobase_convert_to_system_charset(
+					strchr(table_name, '/') + 1,
+					strchr(table->name, '/') + 1,
+					MAX_TABLE_NAME_LEN, &errors);
+
+				if (errors) {
+					/* Table name could not be converted
+					from charset my_charset_filename to
+					UTF-8. This means that the table name
+					is already in UTF-8 (#mysql#50). */
+					strncpy(table_name, table->name,
+						MAX_TABLE_NAME_LEN);
+				}
+
 				/* Replace the prefix 'databasename/tablename'
 				with the new names */
-				strcpy(foreign->id, table->name);
+				strcpy(foreign->id, table_name);
+				if (on_tmp) {
 					strcat(foreign->id,
 					       old_id + ut_strlen(old_name));
+				} else {
+					sprintf(strchr(foreign->id, '/') + 1,
+						"%s%s",
+						strchr(table_name, '/') +1,
+						strstr(old_id, "_ibfk_") );
+				}
+
 			} else {
 				/* This is a >= 4.0.18 format id where the user
 				gave the id name */
@@ -4108,7 +4190,6 @@ dict_print_info_on_foreign_key_in_create_format(
 	dict_foreign_t*	foreign,	/* in: foreign key constraint */
 	ibool		add_newline)	/* in: whether to add a newline */
 {
-	char		constraint_name[MAX_TABLE_NAME_LEN];
 	const char*	stripped_id;
 	ulint	i;
 
@@ -4130,9 +4211,7 @@ dict_print_info_on_foreign_key_in_create_format(
 	}
 
 	fputs(" CONSTRAINT ", file);
-	innobase_convert_to_system_charset(constraint_name, stripped_id,
-					   MAX_TABLE_NAME_LEN);
-	ut_print_name(file, trx, FALSE, constraint_name);
+	ut_print_name(file, trx, FALSE, stripped_id);
 	fputs(" FOREIGN KEY (", file);
 
 	for (i = 0;;) {

storage/innobase/handler/ha_innodb.cc

@@ -901,33 +901,27 @@ innobase_convert_from_table_id(
 
 /**********************************************************************
 Check if the length of the identifier exceeds the maximum allowed.
-The input to this function is an identifier in charset my_charset_filename.
 return true when length of identifier is too long. */
 extern "C"
 my_bool
 innobase_check_identifier_length(
 /*=============================*/
-	const char*	id)	/* in: identifier to check.  it must belong
-				to charset my_charset_filename */
+	const char*	id)	/* in: FK identifier to check excluding the
+				database portion. */
 {
-	char		tmp[MAX_TABLE_NAME_LEN + 10];
-	uint		errors;
-	uint		len;
 	int		well_formed_error = 0;
-	CHARSET_INFO	*cs1 = &my_charset_filename;
-	CHARSET_INFO	*cs2 = thd_charset(current_thd);
+	CHARSET_INFO	*cs = system_charset_info;
+	DBUG_ENTER("innobase_check_identifier_length");
 
-	len = strconvert(cs1, id, cs2, tmp, MAX_TABLE_NAME_LEN + 10, &errors);
-
-	uint res = cs2->cset->well_formed_len(cs2, tmp, tmp + len,
+	uint res = cs->cset->well_formed_len(cs, id, id + strlen(id),
 					     NAME_CHAR_LEN,
 					     &well_formed_error);
 
-	if (well_formed_error || res != len) {
-		my_error(ER_TOO_LONG_IDENT, MYF(0), tmp);
-		return(true);
+	if (well_formed_error || res == NAME_CHAR_LEN) {
+		my_error(ER_TOO_LONG_IDENT, MYF(0), id);
+		DBUG_RETURN(true);
 	}
-	return(false);
+	DBUG_RETURN(false);
 }
 
 /**********************************************************************
@@ -957,17 +951,17 @@ innobase_convert_to_system_charset(
 /*===============================*/
 	char*		to,	/* out: converted identifier */
 	const char*	from,	/* in: identifier to convert */
-	ulint		len)	/* in: length of 'to', in bytes */
+	ulint		len,	/* in: length of 'to', in bytes */
+	uint*		errors)	/* out: error return */
 {
-	uint		errors;
 	uint		rlen;
 	CHARSET_INFO*	cs1 = &my_charset_filename;
 	CHARSET_INFO*	cs2 = system_charset_info;
 
-	rlen = strconvert(cs1, from, cs2, to, len, &errors);
+	rlen = strconvert(cs1, from, cs2, to, len, errors);
 
-	if (errors) {
-		fprintf(stderr, "  InnoDB: There was a problem in converting"
+	if (*errors) {
+		fprintf(stderr, "InnoDB: There was a problem in converting"
 			"'%s' in charset %s to charset %s", from, cs1->name,
 			cs2->name);
 	}
@@ -975,6 +969,32 @@ innobase_convert_to_system_charset(
 	return(rlen);
 }
 
+/**********************************************************************
+Converts an identifier from my_charset_filename to UTF-8 charset. */
+extern "C"
+uint
+innobase_convert_to_filename_charset(
+/*=================================*/
+	char*		to,	/* out: converted identifier */
+	const char*	from,	/* in: identifier to convert */
+	ulint		len)	/* in: length of 'to', in bytes */
+{
+	uint		errors;
+	uint		rlen;
+	CHARSET_INFO*	cs_to = &my_charset_filename;
+	CHARSET_INFO*	cs_from = system_charset_info;
+
+	rlen = strconvert(cs_from, from, cs_to, to, len, &errors);
+
+	if (errors) {
+		fprintf(stderr, "InnoDB: There was a problem in converting"
+			"'%s' in charset %s to charset %s", from, cs_from->name,
+			cs_to->name);
+	}
+
+	return(rlen);
+}
+
 
 /**********************************************************************
 Compares NUL-terminated UTF-8 strings case insensitively.

storage/innobase/include/dict0types.h

@@ -19,4 +19,7 @@ typedef struct dict_foreign_struct	dict_foreign_t;
 typedef struct ind_node_struct		ind_node_t;
 typedef struct tab_node_struct		tab_node_t;
 
+#define TEMP_TABLE_PREFIX                "#sql"
+#define TEMP_TABLE_PATH_PREFIX           "/" TEMP_TABLE_PREFIX
+
 #endif

storage/innobase/include/ha_prototypes.h

@@ -94,8 +94,17 @@ innobase_convert_to_system_charset(
 /*===============================*/
 	char*		to,		/* out: converted identifier */
 	const char*	from,		/* in: identifier to convert */
-	ulint		len);	/* in: length of 'to', in bytes */
+	ulint		len,		/* in: length of 'to', in bytes */
+        uint*		errors);	/* out: error return */
 
+/**********************************************************************
+Converts an identifier from my_charset_filename to UTF-8 charset. */
+uint
+innobase_convert_to_filename_charset(
+/*=================================*/
+        char*           to,     /* out: converted identifier */
+        const char*     from,   /* in: identifier to convert */
+        ulint           len);   /* in: length of 'to', in bytes */
 
 #endif
 #endif

storage/innobase/row/row0mysql.c

@@ -33,6 +33,7 @@ Created 9/17/2000 Heikki Tuuri
 #include "ibuf0ibuf.h"
 #include "m_string.h"
 #include "my_sys.h"
+#include "ha_prototypes.h"
 
 /* A dummy variable used to fool the compiler */
 ibool	row_mysql_identically_false	= FALSE;
@@ -3657,6 +3658,7 @@ row_rename_table_for_mysql(
 	ibool		old_is_tmp, new_is_tmp;
 	pars_info_t*	info			= NULL;
 	ulint		retry			= 0;
+	DBUG_ENTER("row_rename_table_for_mysql");
 
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
 	ut_a(old_name != NULL);
@@ -3672,7 +3674,7 @@ row_rename_table_for_mysql(
 		      stderr);
 
 		trx_commit_for_mysql(trx);
-		return(DB_ERROR);
+		DBUG_RETURN(DB_ERROR);
 	}
 
 	if (row_mysql_is_system_table(new_name)) {
@@ -3685,7 +3687,7 @@ row_rename_table_for_mysql(
 			new_name);
 
 		trx_commit_for_mysql(trx);
-		return(DB_ERROR);
+		DBUG_RETURN(DB_ERROR);
 	}
 
 	trx->op_info = "renaming table";
@@ -3799,12 +3801,29 @@ row_rename_table_for_mysql(
 
 	if (!new_is_tmp) {
 		/* Rename all constraints. */
+		char	new_table_name[MAX_TABLE_NAME_LEN] = "";
+		uint	errors = 0;
 
 		info = pars_info_create();
 
 		pars_info_add_str_literal(info, "new_table_name", new_name);
 		pars_info_add_str_literal(info, "old_table_name", old_name);
 
+		strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
+		innobase_convert_to_system_charset(
+			strchr(new_table_name, '/') + 1,
+			strchr(new_name, '/') +1,
+			MAX_TABLE_NAME_LEN, &errors);
+
+		if (errors) {
+			/* Table name could not be converted from charset
+			my_charset_filename to UTF-8. This means that the
+			table name is already in UTF-8 (#mysql#50). */
+			strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
+		}
+
+		pars_info_add_str_literal(info, "new_table_utf8", new_table_name);
+
 		err = que_eval_sql(
 			info,
 			"PROCEDURE RENAME_CONSTRAINT_IDS () IS\n"
@@ -3816,6 +3835,7 @@ row_rename_table_for_mysql(
 			"old_t_name_len INT;\n"
 			"new_db_name_len INT;\n"
 			"id_len INT;\n"
+			"offset INT;\n"
 			"found INT;\n"
 			"BEGIN\n"
 			"found := 1;\n"
@@ -3824,8 +3844,6 @@ row_rename_table_for_mysql(
 			"new_db_name := SUBSTR(:new_table_name, 0,\n"
 			"                      new_db_name_len);\n"
 			"old_t_name_len := LENGTH(:old_table_name);\n"
-			"gen_constr_prefix := CONCAT(:old_table_name,\n"
-			"                            '_ibfk_');\n"
 			"WHILE found = 1 LOOP\n"
 			"       SELECT ID INTO foreign_id\n"
 			"        FROM SYS_FOREIGN\n"
@@ -3842,12 +3860,12 @@ row_rename_table_for_mysql(
 			"        id_len := LENGTH(foreign_id);\n"
 			"        IF (INSTR(foreign_id, '/') > 0) THEN\n"
 			"               IF (INSTR(foreign_id,\n"
-			"                         gen_constr_prefix) > 0)\n"
+			"                         '_ibfk_') > 0)\n"
 			"               THEN\n"
+			"                offset := INSTR(foreign_id, '_ibfk_') - 1;\n"
 			"                new_foreign_id :=\n"
-			"                CONCAT(:new_table_name,\n"
-			"                SUBSTR(foreign_id, old_t_name_len,\n"
-			"                       id_len - old_t_name_len));\n"
+			"                CONCAT(:new_table_utf8,\n"
+			"			SUBSTR(foreign_id, offset, id_len - offset));\n"
 			"               ELSE\n"
 			"                new_foreign_id :=\n"
 			"                CONCAT(new_db_name,\n"
@@ -4005,7 +4023,7 @@ funct_exit:
 
 	trx->op_info = "";
 
-	return((int) err);
+	DBUG_RETURN((int) err);
 }
 
 /*************************************************************************

storage/innodb_plugin/dict/dict0crea.c

@@ -44,6 +44,21 @@ Created 1/8/1996 Heikki Tuuri
 #include "ut0vec.h"
 #include "ha_prototypes.h"
 
+/*************************************************************************
+Checks if a table name contains the string TEMP_TABLE_PATH_PREFIX which
+denotes temporary tables in MySQL. */
+static
+ibool
+row_is_mysql_tmp_table_name(
+/*========================*/
+				/* out: TRUE if temporary table */
+	const char*     name)   /* in: table name in the form
+				'database/tablename' */
+{
+	return(strstr(name, TEMP_TABLE_PATH_PREFIX) != NULL);
+}
+
+
 /*****************************************************************//**
 Based on a table object, this function builds the entry to be inserted
 in the SYS_TABLES system table.
@@ -1426,25 +1441,46 @@ dict_create_add_foreign_to_dictionary(
 {
 	ulint		error;
 	ulint		i;
-
-	pars_info_t*	info = pars_info_create();
+	pars_info_t*	info;
 
 	if (foreign->id == NULL) {
-		char*	stripped_name;
 		/* Generate a new constraint id */
 		ulint	namelen	= strlen(table->name);
 		char*	id	= mem_heap_alloc(foreign->heap, namelen + 20);
-		/* no overflow if number < 1e13 */
-		sprintf(id, "%s_ibfk_%lu", table->name, (ulong) (*id_nr)++);
-		foreign->id = id;
 
-		stripped_name = strchr(foreign->id, '/') + 1;
-		if (innobase_check_identifier_length(stripped_name)) {
-			fprintf(stderr, "InnoDB: Generated foreign key "
-				"name (%s) is too long\n", foreign->id);
+		if (row_is_mysql_tmp_table_name(table->name)) {
+			sprintf(id, "%s_ibfk_%lu", table->name,
+				(ulong) (*id_nr)++);
+		} else {
+			char	table_name[MAX_TABLE_NAME_LEN + 20] = "";
+			uint	errors = 0;
+
+			strncpy(table_name, table->name,
+				MAX_TABLE_NAME_LEN + 20);
+
+			innobase_convert_to_system_charset(
+				strchr(table_name, '/') + 1,
+				strchr(table->name, '/') + 1,
+				MAX_TABLE_NAME_LEN, &errors);
+
+			if (errors) {
+				strncpy(table_name, table->name,
+					MAX_TABLE_NAME_LEN + 20);
+			}
+
+			sprintf(id, "%s_ibfk_%lu", table_name,
+				(ulong) (*id_nr)++);
+
+			if (innobase_check_identifier_length(
+				strchr(id,'/') + 1)) {
 				return(DB_IDENTIFIER_TOO_LONG);
 			}
 		}
+		foreign->id = id;
+
+	}
+
+	info = pars_info_create();
 
 	pars_info_add_str_literal(info, "id", foreign->id);
 

storage/innodb_plugin/dict/dict0dict.c

@@ -1092,22 +1092,78 @@ dict_table_rename_in_cache(
 		strcpy(foreign->foreign_table_name, table->name);
 
 		if (strchr(foreign->id, '/')) {
+			/* This is a >= 4.0.18 format id */
+
 			ulint	db_len;
 			char*	old_id;
+			char    old_name_cs_filename[MAX_TABLE_NAME_LEN+20];
+			uint    errors = 0;
+
+			/* All table names are internally stored in charset
+			my_charset_filename (except the temp tables and the
+			partition identifier suffix in partition tables). The
+			foreign key constraint names are internally stored
+			in UTF-8 charset.  The variable fkid here is used
+			to store foreign key constraint name in charset
+			my_charset_filename for comparison further below. */
+			char    fkid[MAX_TABLE_NAME_LEN+20];
+			ibool	on_tmp = FALSE;
+
+			/* The old table name in my_charset_filename is stored
+			in old_name_cs_filename */
+
+			strncpy(old_name_cs_filename, old_name,
+				MAX_TABLE_NAME_LEN);
+			if (strstr(old_name, TEMP_TABLE_PATH_PREFIX) == NULL) {
+
+				innobase_convert_to_system_charset(
+					strchr(old_name_cs_filename, '/') + 1,
+					strchr(old_name, '/') + 1,
+					MAX_TABLE_NAME_LEN, &errors);
+
+				if (errors) {
+					/* There has been an error to convert
+					old table into UTF-8.  This probably
+					means that the old table name is
+					actually in UTF-8. */
+					innobase_convert_to_filename_charset(
+						strchr(old_name_cs_filename,
+						       '/') + 1,
+						strchr(old_name, '/') + 1,
+						MAX_TABLE_NAME_LEN);
+				} else {
+					/* Old name already in
+					my_charset_filename */
+					strncpy(old_name_cs_filename, old_name,
+						MAX_TABLE_NAME_LEN);
+				}
+			}
 
-			/* This is a >= 4.0.18 format id */
+			strncpy(fkid, foreign->id, MAX_TABLE_NAME_LEN);
+
+			if (strstr(fkid, TEMP_TABLE_PATH_PREFIX) == NULL) {
+				innobase_convert_to_filename_charset(
+					strchr(fkid, '/') + 1,
+					strchr(foreign->id, '/') + 1,
+					MAX_TABLE_NAME_LEN+20);
+			} else {
+				on_tmp = TRUE;
+			}
 
 			old_id = mem_strdup(foreign->id);
 
-			if (ut_strlen(foreign->id) > ut_strlen(old_name)
+			if (ut_strlen(fkid) > ut_strlen(old_name_cs_filename)
 			    + ((sizeof dict_ibfk) - 1)
-			    && !memcmp(foreign->id, old_name,
-				       ut_strlen(old_name))
-			    && !memcmp(foreign->id + ut_strlen(old_name),
+			    && !memcmp(fkid, old_name_cs_filename,
+				       ut_strlen(old_name_cs_filename))
+			    && !memcmp(fkid + ut_strlen(old_name_cs_filename),
 				       dict_ibfk, (sizeof dict_ibfk) - 1)) {
 
 				/* This is a generated >= 4.0.18 format id */
 
+				char	table_name[MAX_TABLE_NAME_LEN] = "";
+				uint	errors = 0;
+
 				if (strlen(table->name) > strlen(old_name)) {
 					foreign->id = mem_heap_alloc(
 						foreign->heap,
@@ -1115,11 +1171,36 @@ dict_table_rename_in_cache(
 						+ strlen(old_id) + 1);
 				}
 
+				/* Convert the table name to UTF-8 */
+				strncpy(table_name, table->name,
+					MAX_TABLE_NAME_LEN);
+				innobase_convert_to_system_charset(
+					strchr(table_name, '/') + 1,
+					strchr(table->name, '/') + 1,
+					MAX_TABLE_NAME_LEN, &errors);
+
+				if (errors) {
+					/* Table name could not be converted
+					from charset my_charset_filename to
+					UTF-8. This means that the table name
+					is already in UTF-8 (#mysql#50). */
+					strncpy(table_name, table->name,
+						MAX_TABLE_NAME_LEN);
+				}
+
 				/* Replace the prefix 'databasename/tablename'
 				with the new names */
-				strcpy(foreign->id, table->name);
+				strcpy(foreign->id, table_name);
+				if (on_tmp) {
 					strcat(foreign->id,
 					       old_id + ut_strlen(old_name));
+				} else {
+					sprintf(strchr(foreign->id, '/') + 1,
+						"%s%s",
+						strchr(table_name, '/') +1,
+						strstr(old_id, "_ibfk_") );
+				}
+
 			} else {
 				/* This is a >= 4.0.18 format id where the user
 				gave the id name */
@@ -4602,7 +4683,6 @@ dict_print_info_on_foreign_key_in_create_format(
 	dict_foreign_t*	foreign,	/*!< in: foreign key constraint */
 	ibool		add_newline)	/*!< in: whether to add a newline */
 {
-	char		constraint_name[MAX_TABLE_NAME_LEN];
 	const char*	stripped_id;
 	ulint	i;
 
@@ -4624,9 +4704,7 @@ dict_print_info_on_foreign_key_in_create_format(
 	}
 
 	fputs(" CONSTRAINT ", file);
-	innobase_convert_from_id(&my_charset_filename, constraint_name,
-				 stripped_id, MAX_TABLE_NAME_LEN);
-	ut_print_name(file, trx, FALSE, constraint_name);
+	ut_print_name(file, trx, FALSE, stripped_id);
 	fputs(" FOREIGN KEY (", file);
 
 	for (i = 0;;) {

storage/innodb_plugin/handler/ha_innodb.cc

@@ -1013,33 +1013,27 @@ innobase_convert_from_table_id(
 
 /**********************************************************************
 Check if the length of the identifier exceeds the maximum allowed.
-The input to this function is an identifier in charset my_charset_filename.
 return true when length of identifier is too long. */
-extern "C" UNIV_INTERN
+extern "C"
 my_bool
 innobase_check_identifier_length(
 /*=============================*/
-	const char*	id)	/* in: identifier to check.  it must belong
-				to charset my_charset_filename */
+	const char*	id)	/* in: FK identifier to check excluding the
+				database portion. */
 {
-	char		tmp[MAX_TABLE_NAME_LEN + 10];
-	uint		errors;
-	uint		len;
 	int		well_formed_error = 0;
-	CHARSET_INFO*	cs1 = &my_charset_filename;
-	CHARSET_INFO*	cs2 = thd_charset(current_thd);
-
-	len = strconvert(cs1, id, cs2, tmp, MAX_TABLE_NAME_LEN + 10, &errors);
+	CHARSET_INFO	*cs = system_charset_info;
+	DBUG_ENTER("innobase_check_identifier_length");
 
-	uint res = cs2->cset->well_formed_len(cs2, tmp, tmp + len,
+	uint res = cs->cset->well_formed_len(cs, id, id + strlen(id),
 					     NAME_CHAR_LEN,
 					     &well_formed_error);
 
-	if (well_formed_error || res != len) {
-		my_error(ER_TOO_LONG_IDENT, MYF(0), tmp);
-		return(true);
+	if (well_formed_error || res == NAME_CHAR_LEN) {
+		my_error(ER_TOO_LONG_IDENT, MYF(0), id);
+		DBUG_RETURN(true);
 	}
-	return(false);
+	DBUG_RETURN(false);
 }
 
 /******************************************************************//**
@@ -11614,4 +11608,30 @@ test_innobase_convert_name()
 	}
 }
 
+/**********************************************************************
+Converts an identifier from my_charset_filename to UTF-8 charset. */
+extern "C"
+uint
+innobase_convert_to_filename_charset(
+/*=================================*/
+	char*		to,	/* out: converted identifier */
+	const char*	from,	/* in: identifier to convert */
+	ulint		len)	/* in: length of 'to', in bytes */
+{
+	uint		errors;
+	uint		rlen;
+	CHARSET_INFO*	cs_to = &my_charset_filename;
+	CHARSET_INFO*	cs_from = system_charset_info;
+
+	rlen = strconvert(cs_from, from, cs_to, to, len, &errors);
+
+	if (errors) {
+		fprintf(stderr, "InnoDB: There was a problem in converting"
+			"'%s' in charset %s to charset %s", from, cs_from->name,
+			cs_to->name);
+	}
+
+	return(rlen);
+}
+
 #endif /* UNIV_COMPILE_TEST_FUNCS */

storage/innodb_plugin/include/dict0types.h

@@ -40,4 +40,7 @@ typedef struct tab_node_struct		tab_node_t;
 #define	DICT_HDR_SPACE		0	/* the SYSTEM tablespace */
 #define	DICT_HDR_PAGE_NO	FSP_DICT_HDR_PAGE_NO
 
+#define TEMP_TABLE_PREFIX                "#sql"
+#define TEMP_TABLE_PATH_PREFIX           "/" TEMP_TABLE_PREFIX
+
 #endif

storage/innodb_plugin/include/ha_prototypes.h

@@ -279,4 +279,24 @@ innobase_check_identifier_length(
 	const char*	id);	/* in: identifier to check.  it must belong
 				to charset my_charset_filename */
 
+/**********************************************************************
+Converts an identifier from my_charset_filename to UTF-8 charset. */
+uint
+innobase_convert_to_system_charset(
+/*===============================*/
+	char*           to,		/* out: converted identifier */
+	const char*     from,		/* in: identifier to convert */
+	ulint           len,		/* in: length of 'to', in bytes */
+	uint*		errors);	/* out: error return */
+
+/**********************************************************************
+Converts an identifier from my_charset_filename to UTF-8 charset. */
+uint
+innobase_convert_to_filename_charset(
+/*=================================*/
+	char*           to,     /* out: converted identifier */
+	const char*     from,   /* in: identifier to convert */
+	ulint           len);   /* in: length of 'to', in bytes */
+
+
 #endif

storage/innodb_plugin/row/row0mysql.c

@@ -51,6 +51,7 @@ Created 9/17/2000 Heikki Tuuri
 #include "btr0sea.h"
 #include "fil0fil.h"
 #include "ibuf0ibuf.h"
+#include "ha_prototypes.h"
 
 #ifdef __WIN__
 /* error LNK2001: unresolved external symbol _debug_sync_C_callback_ptr */
@@ -3902,12 +3903,29 @@ row_rename_table_for_mysql(
 		goto end;
 	} else if (!new_is_tmp) {
 		/* Rename all constraints. */
+		char	new_table_name[MAX_TABLE_NAME_LEN] = "";
+		uint	errors = 0;
 
 		info = pars_info_create();
 
 		pars_info_add_str_literal(info, "new_table_name", new_name);
 		pars_info_add_str_literal(info, "old_table_name", old_name);
 
+		strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
+		innobase_convert_to_system_charset(
+			strchr(new_table_name, '/') + 1,
+			strchr(new_name, '/') +1,
+			MAX_TABLE_NAME_LEN, &errors);
+
+		if (errors) {
+			/* Table name could not be converted from charset
+			my_charset_filename to UTF-8. This means that the
+			table name is already in UTF-8 (#mysql#50). */
+			strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
+		}
+
+		pars_info_add_str_literal(info, "new_table_utf8", new_table_name);
+
 		err = que_eval_sql(
 			info,
 			"PROCEDURE RENAME_CONSTRAINT_IDS () IS\n"
@@ -3919,6 +3937,7 @@ row_rename_table_for_mysql(
 			"old_t_name_len INT;\n"
 			"new_db_name_len INT;\n"
 			"id_len INT;\n"
+			"offset INT;\n"
 			"found INT;\n"
 			"BEGIN\n"
 			"found := 1;\n"
@@ -3927,8 +3946,6 @@ row_rename_table_for_mysql(
 			"new_db_name := SUBSTR(:new_table_name, 0,\n"
 			"                      new_db_name_len);\n"
 			"old_t_name_len := LENGTH(:old_table_name);\n"
-			"gen_constr_prefix := CONCAT(:old_table_name,\n"
-			"                            '_ibfk_');\n"
 			"WHILE found = 1 LOOP\n"
 			"       SELECT ID INTO foreign_id\n"
 			"        FROM SYS_FOREIGN\n"
@@ -3945,12 +3962,13 @@ row_rename_table_for_mysql(
 			"        id_len := LENGTH(foreign_id);\n"
 			"        IF (INSTR(foreign_id, '/') > 0) THEN\n"
 			"               IF (INSTR(foreign_id,\n"
-			"                         gen_constr_prefix) > 0)\n"
+			"                         '_ibfk_') > 0)\n"
 			"               THEN\n"
+                        "                offset := INSTR(foreign_id, '_ibfk_') - 1;\n"
 			"                new_foreign_id :=\n"
-			"                CONCAT(:new_table_name,\n"
-			"                SUBSTR(foreign_id, old_t_name_len,\n"
-			"                       id_len - old_t_name_len));\n"
+			"                CONCAT(:new_table_utf8,\n"
+			"                SUBSTR(foreign_id, offset,\n"
+			"                       id_len - offset));\n"
 			"               ELSE\n"
 			"                new_foreign_id :=\n"
 			"                CONCAT(new_db_name,\n"