MDEV-16594 ALTER DATA DIRECTORY in PARTITIONS of InnoDB storage does nothing silently

InnoDB intentionally (it's a documented behavior) ignores changing of
DATA DIRECTORY and INDEX DIRECTORY for partitions. Though we should
issue warning when this happens.

mysql-test/suite/parts/r/alter_data_directory_innodb.result

@@ -53,6 +53,9 @@ ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
 PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,
 PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB
 );
+Warnings:
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
 SHOW CREATE TABLE t;
 Table	Create Table
 t	CREATE TABLE `t` (

mysql-test/suite/parts/r/reorganize_partition_innodb.result

+#
+# MDEV-15953 Alter InnoDB Partitioned Table Moves Files (which were originally not in the datadir) to the datadir
+#
+CREATE TABLE t (
+a INT NOT NULL
+) ENGINE=INNODB
+PARTITION BY HASH (a) (
+PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB,
+PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB
+);
+INSERT INTO t VALUES (1);
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+ALTER TABLE t ADD PRIMARY KEY pk(a), ALGORITHM=INPLACE;
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+ALTER TABLE t DROP PRIMARY KEY, ALGORITHM=COPY;
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+SET @TMP = @@GLOBAL.INNODB_FILE_PER_TABLE;
+SET GLOBAL INNODB_FILE_PER_TABLE=OFF;
+ALTER TABLE t ADD PRIMARY KEY pk(a), ALGORITHM=INPLACE;
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+SET GLOBAL INNODB_FILE_PER_TABLE=@TMP;
+ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,
+PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB
+);
+Warnings:
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/',
+PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+);
+Warnings:
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+PARTITION p1 INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,
+PARTITION p2 INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB
+);
+Warnings:
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY HASH (a)
+(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,
+ PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */
+DROP TABLE t;
+CREATE TABLE t (
+a INT NOT NULL
+) ENGINE=INNODB
+PARTITION BY RANGE (a)
+SUBPARTITION BY HASH (a)
+SUBPARTITIONS 2
+(
+PARTITION p1 VALUES LESS THAN (7)
+DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/'
+         INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/'
+         ENGINE = INNODB,
+PARTITION p2 VALUES LESS THAN MAXVALUE
+DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/'
+         INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/'
+         ENGINE = INNODB
+);
+Warnings:
+Warning	1618	<INDEX DIRECTORY> option ignored
+Warning	1618	<INDEX DIRECTORY> option ignored
+Warning	1618	<INDEX DIRECTORY> option ignored
+Warning	1618	<INDEX DIRECTORY> option ignored
+ALTER TABLE t
+REORGANIZE PARTITION p1,p2 INTO
+(
+PARTITION p1 VALUES LESS THAN (7)
+DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   ENGINE = INNODB,
+PARTITION p2 VALUES LESS THAN MAXVALUE
+DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   ENGINE = INNODB
+);
+Warnings:
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<DATA DIRECTORY> option ignored for InnoDB partition
+Warning	1982	<INDEX DIRECTORY> option ignored for InnoDB partition
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `a` int(11) NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+/*!50100 PARTITION BY RANGE (a)
+SUBPARTITION BY HASH (a)
+SUBPARTITIONS 2
+(PARTITION p1 VALUES LESS THAN (7) DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = InnoDB,
+ PARTITION p2 VALUES LESS THAN MAXVALUE DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' INDEX DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = InnoDB) */
+DROP TABLE t;

mysql-test/suite/parts/t/reorganize_partition_innodb.test

+--source include/have_innodb.inc
+--source include/have_partition.inc
+
+--echo #
+--echo # MDEV-15953 Alter InnoDB Partitioned Table Moves Files (which were originally not in the datadir) to the datadir
+--echo #
+
+mkdir $MYSQLTEST_VARDIR/tmp/partitions_here;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval CREATE TABLE t (
+      a INT NOT NULL
+    ) ENGINE=INNODB
+PARTITION BY HASH (a) (
+  PARTITION p1 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB,
+  PARTITION p2 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB
+);
+INSERT INTO t VALUES (1);
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+ALTER TABLE t ADD PRIMARY KEY pk(a), ALGORITHM=INPLACE;
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+ALTER TABLE t DROP PRIMARY KEY, ALGORITHM=COPY;
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+SET @TMP = @@GLOBAL.INNODB_FILE_PER_TABLE;
+SET GLOBAL INNODB_FILE_PER_TABLE=OFF;
+ALTER TABLE t ADD PRIMARY KEY pk(a), ALGORITHM=INPLACE;
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+SET GLOBAL INNODB_FILE_PER_TABLE=@TMP;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+  PARTITION p1 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,
+  PARTITION p2 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB
+);
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+  PARTITION p1 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/',
+  PARTITION p2 DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+);
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (
+  PARTITION p1 INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,
+  PARTITION p2 INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB
+);
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+
+DROP TABLE t;
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval CREATE TABLE t (
+      a INT NOT NULL
+    ) ENGINE=INNODB
+PARTITION BY RANGE (a)
+  SUBPARTITION BY HASH (a)
+  SUBPARTITIONS 2
+  (
+     PARTITION p1 VALUES LESS THAN (7)
+         DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/'
+         INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/'
+         ENGINE = INNODB,
+     PARTITION p2 VALUES LESS THAN MAXVALUE
+         DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/'
+         INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_here/'
+         ENGINE = INNODB
+  );
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+eval ALTER TABLE t
+REORGANIZE PARTITION p1,p2 INTO
+(
+ PARTITION p1 VALUES LESS THAN (7)
+   DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   ENGINE = INNODB,
+ PARTITION p2 VALUES LESS THAN MAXVALUE
+   DATA DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   INDEX DIRECTORY = '$MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/'
+   ENGINE = INNODB
+);
+
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+SHOW CREATE TABLE t;
+
+DROP TABLE t;
+
+rmdir $MYSQLTEST_VARDIR/tmp/partitions_here/test;
+rmdir $MYSQLTEST_VARDIR/tmp/partitions_here;
+

sql/share/errmsg-utf8.txt

@@ -7142,3 +7142,5 @@ ER_NO_EIS_FOR_FIELD
 ER_WARN_AGGFUNC_DEPENDENCE
         eng "Aggregate function '%-.192s)' of SELECT #%d belongs to SELECT #%d"
         ukr "Агрегатна функція '%-.192s)' з SELECTу #%d належить до SELECTу #%d"
+WARN_INNODB_PARTITION_OPTION_IGNORED
+        eng "<%-.64s> option ignored for InnoDB partition"

sql/sql_partition.cc

@@ -4660,6 +4660,69 @@ bool compare_partition_options(HA_CREATE_INFO *table_create_info,
 }
 
 
+/**
+  Check if the ALTER command tries to change DATA DIRECTORY
+  or INDEX DIRECTORY for its partitions and warn if so.
+  @param thd  THD
+  @param part_elem partition_element to check
+ */
+static void warn_if_datadir_altered(THD *thd,
+    const partition_element *part_elem)
+{
+  DBUG_ASSERT(part_elem);
+
+  if (part_elem->engine_type &&
+      part_elem->engine_type->db_type != DB_TYPE_INNODB)
+    return;
+
+  if (part_elem->data_file_name)
+  {
+    push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
+        WARN_INNODB_PARTITION_OPTION_IGNORED,
+        ER(WARN_INNODB_PARTITION_OPTION_IGNORED),
+        "DATA DIRECTORY");
+  }
+  if (part_elem->index_file_name)
+  {
+    push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
+        WARN_INNODB_PARTITION_OPTION_IGNORED,
+        ER(WARN_INNODB_PARTITION_OPTION_IGNORED),
+        "INDEX DIRECTORY");
+  }
+}
+
+
+/**
+  Currently changing DATA DIRECTORY and INDEX DIRECTORY for InnoDB partitions is
+  not possible. This function checks it and warns on that case.
+  @param thd THD
+  @param tab_part_info old partition info
+  @param alt_part_info new partition info
+ */
+static void check_datadir_altered_for_innodb(THD *thd,
+    partition_info *tab_part_info,
+    partition_info *alt_part_info)
+{
+  if (tab_part_info->default_engine_type->db_type != DB_TYPE_INNODB)
+    return;
+
+  for (List_iterator_fast<partition_element> it(alt_part_info->partitions);
+       partition_element *part_elem= it++;)
+  {
+    if (alt_part_info->is_sub_partitioned())
+    {
+      for (List_iterator_fast<partition_element> it2(part_elem->subpartitions);
+           const partition_element *sub_part_elem= it2++;)
+      {
+        warn_if_datadir_altered(thd, sub_part_elem);
+      }
+    }
+    else
+      warn_if_datadir_altered(thd, part_elem);
+  }
+}
+
+
 /*
   Prepare for ALTER TABLE of partition structure
 
@@ -5389,6 +5452,8 @@ state of p1.
       {
         goto err;
       }
+      check_datadir_altered_for_innodb(thd, tab_part_info, alt_part_info);
+
 /*
 Online handling:
 REORGANIZE PARTITION: