Fix Bug #53592 in plugin code, "crash replacing duplicates into table

after fast alter table added unique key". Look up MySQL index number should
go through index translation table.

rb://347, approved by Marko

mysql-test/suite/innodb_plugin/r/innodb_bug53592.result

+set old_alter_table=0;
+create table bug53592(a int) engine=innodb row_format=compact;
+alter table bug53592 add column b text charset utf8;
+alter table bug53592 add column c blob not null;
+create index bug53592_b on bug53592(b(81));
+create unique index bug53592_c on bug53592(c(1));
+replace into bug53592 values (),();
+Warnings:
+Warning	1364	Field 'c' doesn't have a default value
+check table bug53592;
+Table	Op	Msg_type	Msg_text
+test.bug53592	check	status	OK
+drop table bug53592;
+set old_alter_table=1;
+create table bug53592(a int) engine=innodb row_format=compact;
+alter table bug53592 add column b text charset utf8;
+alter table bug53592 add column c blob not null;
+create index bug53592_b on bug53592(b(81));
+create unique index bug53592_c on bug53592(c(1));
+replace into bug53592 values (),();
+Warnings:
+Warning	1364	Field 'c' doesn't have a default value
+check table bug53592;
+Table	Op	Msg_type	Msg_text
+test.bug53592	check	status	OK
+drop table bug53592;

mysql-test/suite/innodb_plugin/t/innodb_bug53592.test

+# Testcase for Bug #53592 - "crash replacing duplicates into
+# table after fast alter table added unique key". The fix is to make
+# sure index number lookup should go through "index translation table".
+
+--source include/have_innodb.inc
+
+# Use FIC for index creation
+set old_alter_table=0;
+
+create table bug53592(a int) engine=innodb row_format=compact;
+
+alter table bug53592 add column b text charset utf8;
+
+alter table bug53592 add column c blob not null;
+
+# Create a non-unique nonclustered index
+create index bug53592_b on bug53592(b(81));
+
+# Create a unique index, this unique index should have smaller
+# index number than bug53592_b, since unique index ranks higher
+# than regular index does
+create unique index bug53592_c on bug53592(c(1));
+
+# This will trigger a dup key error and will require fetching
+# the index number through a index structure for the error reporting.
+# To get the correct index number, the code should go through index
+# translation table. Otherwise, it will get the wrong index
+# number and later trigger a server crash.
+replace into bug53592 values (),();
+
+check table bug53592;
+
+drop table bug53592;
+
+# Running the same set of test when "old_alter_table" is turned on
+set old_alter_table=1;
+
+create table bug53592(a int) engine=innodb row_format=compact;
+
+alter table bug53592 add column b text charset utf8;
+
+alter table bug53592 add column c blob not null;
+
+# Create a non-unique nonclustered index
+create index bug53592_b on bug53592(b(81));
+
+# Create a unique index
+create unique index bug53592_c on bug53592(c(1));
+
+# This will trigger a dup key error and will require fetching
+# the index number through a index structure for the error reporting.
+# To get the correct index number, the code should go through index
+# translation table. Otherwise, it will get the wrong index
+# number and later trigger a server crash.
+replace into bug53592 values (),();
+
+check table bug53592;
+
+drop table bug53592;

storage/innodb_plugin/handler/ha_innodb.cc

@@ -6673,7 +6673,7 @@ ha_innobase::create(
 			 (int) form->s->primary_key :
 			 -1);
 
-	/* Our function row_get_mysql_key_number_for_index assumes
+	/* Our function innobase_get_mysql_key_number_for_index assumes
 	the primary key is always number 0, if it exists */
 
 	ut_a(primary_key_no == -1 || primary_key_no == 0);
@@ -7389,6 +7389,67 @@ ha_innobase::read_time(
 	return(ranges + (double) rows / (double) total_rows * time_for_scan);
 }
 
+/*********************************************************************//**
+Calculates the key number used inside MySQL for an Innobase index. We will
+first check the "index translation table" for a match of the index to get
+the index number. If there does not exist an "index translation table",
+or not able to find the index in the translation table, then we will fall back
+to the traditional way of looping through dict_index_t list to find a
+match. In this case, we have to take into account if we generated a
+default clustered index for the table
+@return the key number used inside MySQL */
+static
+unsigned int
+innobase_get_mysql_key_number_for_index(
+/*====================================*/
+	INNOBASE_SHARE*		share,	/*!< in: share structure for index
+					translation table. */
+	const TABLE*		table,	/*!< in: table in MySQL data
+					dictionary */
+	dict_table_t*		ib_table,/*!< in: table in Innodb data
+					dictionary */
+        const dict_index_t*     index)	/*!< in: index */
+{
+	const dict_index_t*	ind;
+	unsigned int		i;
+
+	ut_ad(index);
+	ut_ad(ib_table);
+	ut_ad(table);
+	ut_ad(share);
+
+	/* If index translation table exists, we will first check
+	the index through index translation table for a match. */
+        if (share->idx_trans_tbl.index_mapping) {
+		for (i = 0; i < share->idx_trans_tbl.index_count; i++) {
+			if (share->idx_trans_tbl.index_mapping[i] == index) {
+				return(i);
+			}
+		}
+
+		/* Print an error message if we cannot find the index
+		** in the "index translation table". */
+		sql_print_error("Cannot find index %s in InnoDB index "
+				"translation table.", index->name);
+	}
+
+	/* If we do not have an "index translation table", or not able
+	to find the index in the translation table, we'll directly find
+	matching index in the dict_index_t list */
+	for (i = 0; i < table->s->keys; i++) {
+		ind = dict_table_get_index_on_name(
+			ib_table, table->key_info[i].name);
+
+        	if (index == ind) {
+			return(i);
+		}
+        }
+
+	sql_print_error("Cannot find matching index number for index %s "
+			 "in InnoDB index list.", index->name);
+
+        return(0);
+}
 /*********************************************************************//**
 Returns statistics information of the table to the MySQL interpreter,
 in various fields of the handle object. */
@@ -7658,8 +7719,8 @@ ha_innobase::info(
 		err_index = trx_get_error_info(prebuilt->trx);
 
 		if (err_index) {
-			errkey = (unsigned int)
-				row_get_mysql_key_number_for_index(err_index);
+			errkey = innobase_get_mysql_key_number_for_index(
+					share, table, ib_table, err_index);
 		} else {
 			errkey = (unsigned int) prebuilt->trx->error_key_num;
 		}

storage/innodb_plugin/include/row0mysql.h

@@ -253,15 +253,6 @@ row_table_got_default_clust_index(
 /*==============================*/
 	const dict_table_t*	table);	/*!< in: table */
 /*********************************************************************//**
-Calculates the key number used inside MySQL for an Innobase index. We have
-to take into account if we generated a default clustered index for the table
-@return	the key number used inside MySQL */
-UNIV_INTERN
-ulint
-row_get_mysql_key_number_for_index(
-/*===============================*/
-	const dict_index_t*	index);	/*!< in: index */
-/*********************************************************************//**
 Does an update or delete of a row for MySQL.
 @return	error code or DB_SUCCESS */
 UNIV_INTERN

storage/innodb_plugin/row/row0mysql.c

@@ -1645,37 +1645,6 @@ row_table_got_default_clust_index(
 	return(dict_index_get_nth_col(clust_index, 0)->mtype == DATA_SYS);
 }
 
-/*********************************************************************//**
-Calculates the key number used inside MySQL for an Innobase index. We have
-to take into account if we generated a default clustered index for the table
-@return	the key number used inside MySQL */
-UNIV_INTERN
-ulint
-row_get_mysql_key_number_for_index(
-/*===============================*/
-	const dict_index_t*	index)	/*!< in: index */
-{
-	const dict_index_t*	ind;
-	ulint			i;
-
-	ut_a(index);
-
-	i = 0;
-	ind = dict_table_get_first_index(index->table);
-
-	while (index != ind) {
-		ind = dict_table_get_next_index(ind);
-		i++;
-	}
-
-	if (row_table_got_default_clust_index(index->table)) {
-		ut_a(i > 0);
-		i--;
-	}
-
-	return(i);
-}
-
 /*********************************************************************//**
 Locks the data dictionary in shared mode from modifications, for performing
 foreign key check, rollback, or other operation invisible to MySQL. */

storage/innodb_plugin/setup.sh

@@ -21,7 +21,7 @@
 
 set -eu
 
-TARGETDIR=../storage/innobase
+TARGETDIR=../storage/innodb_plugin
 
 # link the build scripts
 BUILDSCRIPTS="compile-innodb compile-innodb-debug"