Replace ha_notify_table_changed() with notify_tabledef_changed()

Reason for the change was that ha_notify_table_changed() was done
after table open when .frm had been replaced, which caused failure
in engines that checks on open if .frm matches the engines table
definition.

Other changes:
- Remove not needed open/close call at end of inline alter table.
  Some test that depended on the table beeing in the table cache after
  ALTER TABLE had to be updated.

mysql-test/main/alter_table_online.result

@@ -253,19 +253,19 @@ Feature_delay_key_write	0
 alter online table t1 delay_key_write=1;
 show status like 'Feature_delay_key_write';
 Variable_name	Value
+Feature_delay_key_write	0
+flush tables;
+insert t1 values (1,2),(2,3),(3,4);
+show status like 'Feature_delay_key_write';
+Variable_name	Value
+Feature_delay_key_write	1
+alter online table t1 delay_key_write=0;
+show status like 'Feature_delay_key_write';
+Variable_name	Value
 Feature_delay_key_write	1
 flush tables;
 insert t1 values (1,2),(2,3),(3,4);
 show status like 'Feature_delay_key_write';
 Variable_name	Value
-Feature_delay_key_write	2
+Feature_delay_key_write	1
-alter online table t1 delay_key_write=0;
-show status like 'Feature_delay_key_write';
-Variable_name	Value
-Feature_delay_key_write	2
-flush tables;
-insert t1 values (1,2),(2,3),(3,4);
-show status like 'Feature_delay_key_write';
-Variable_name	Value
-Feature_delay_key_write	2
 drop table t1;

mysql-test/suite/gcol/r/gcol_bugfixes.result

@@ -535,7 +535,6 @@ CREATE TABLE t (a INTEGER) engine=innodb;
 ALTER TABLE t ADD b INTEGER AS (SUBSTR('','a',1));
 Warnings:
 Warning	1292	Truncated incorrect INTEGER value: 'a'
-Warning	1292	Truncated incorrect INTEGER value: 'a'
 DROP TABLE t;
 set sql_mode= @save_old_sql_mode;
 # Bug#21875520 Problems with virtual column indexes

mysql-test/suite/gcol/r/innodb_virtual_stats.result

@@ -24,6 +24,9 @@ vidxcd	n_diff_pfx03	c,d,DB_ROW_ID
 vidxcd	n_leaf_pages	Number of leaf pages in the index
 vidxcd	size	Number of pages in the index
 ALTER TABLE t ADD COLUMN e INT GENERATED ALWAYS AS(a+a+b), ADD INDEX idxb (b), ALGORITHM=INPLACE;
+select count(*) from t;
+count(*)
+1
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
@@ -45,6 +48,9 @@ vidxcd	n_diff_pfx03	c,d,DB_ROW_ID
 vidxcd	n_leaf_pages	Number of leaf pages in the index
 vidxcd	size	Number of pages in the index
 ALTER TABLE t DROP COLUMN c, DROP INDEX idxa, ALGORITHM=INPLACE;
+select count(*) from t;
+count(*)
+1
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
@@ -61,6 +67,9 @@ vidxcd	n_diff_pfx02	d,DB_ROW_ID
 vidxcd	n_leaf_pages	Number of leaf pages in the index
 vidxcd	size	Number of pages in the index
 ALTER TABLE t ADD INDEX vidxe (e), ALGORITHM=INPLACE;
+select count(*) from t;
+count(*)
+1
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
@@ -81,6 +90,9 @@ vidxe	n_diff_pfx02	e,DB_ROW_ID
 vidxe	n_leaf_pages	Number of leaf pages in the index
 vidxe	size	Number of pages in the index
 ALTER TABLE t ADD COLUMN f INT GENERATED ALWAYS AS(a + a), ADD INDEX vidxf (f), ALGORITHM=INPLACE;
+select count(*) from t;
+count(*)
+1
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';

mysql-test/suite/gcol/t/innodb_virtual_stats.test

@@ -20,24 +20,28 @@ FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
 
 ALTER TABLE t ADD COLUMN e INT GENERATED ALWAYS AS(a+a+b), ADD INDEX idxb (b), ALGORITHM=INPLACE;
+select count(*) from t;
 
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
 
 ALTER TABLE t DROP COLUMN c, DROP INDEX idxa, ALGORITHM=INPLACE;
+select count(*) from t;
 
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
 
 ALTER TABLE t ADD INDEX vidxe (e), ALGORITHM=INPLACE;
+select count(*) from t;
 
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats
 WHERE database_name = 'test' AND table_name = 't';
 
 ALTER TABLE t ADD COLUMN f INT GENERATED ALWAYS AS(a + a), ADD INDEX vidxf (f), ALGORITHM=INPLACE;
+select count(*) from t;
 
 SELECT index_name, stat_name, stat_description
 FROM mysql.innodb_index_stats

mysql-test/suite/innodb/r/innodb-wl5522.result

@@ -285,14 +285,16 @@ ERROR HY000: Tablespace has been discarded for table `t1`
 restore: t1 .ibd and .cfg files
 ALTER TABLE t1 IMPORT TABLESPACE;
 ERROR HY000: Schema mismatch (Index x not found in tablespace meta-data file.)
+select count(*) from t1;
+ERROR HY000: Tablespace has been discarded for table `t1`
 ALTER TABLE t1 DROP INDEX x;
-Warnings:
+ALTER TABLE t1 DROP INDEX x, ALGORITHM=copy;
-Warning	1814	Tablespace has been discarded for table `t1`
+ERROR 42000: Can't DROP INDEX `x`; check that it exists
 ALTER TABLE t1 ADD INDEX idx(c2);
-Warnings:
-Warning	1814	Tablespace has been discarded for table `t1`
 restore: t1 .ibd and .cfg files
 ALTER TABLE t1 IMPORT TABLESPACE;
+Warnings:
+Warning	1814	Tablespace has been discarded for table `t1`
 CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK

mysql-test/suite/innodb/r/instant_alter_crash.result

@@ -6,16 +6,17 @@ CREATE TABLE t1(id INT PRIMARY KEY, c2 INT UNIQUE)
 ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
 CREATE TABLE t2 LIKE t1;
 INSERT INTO t1 VALUES(0,2);
-BEGIN;
 INSERT INTO t2 VALUES(2,1);
 ALTER TABLE t2 ADD COLUMN (c3 TEXT NOT NULL DEFAULT 'De finibus bonorum');
+BEGIN;
+INSERT INTO t2 VALUES(3,4,'accusantium doloremque laudantium');
 connect ddl, localhost, root;
 SET DEBUG_SYNC='innodb_alter_inplace_before_commit SIGNAL ddl WAIT_FOR ever';
 ALTER TABLE t1 ADD COLUMN (c3 TEXT NOT NULL DEFAULT ' et malorum');
 connection default;
 SET DEBUG_SYNC='now WAIT_FOR ddl';
 SET GLOBAL innodb_flush_log_at_trx_commit=1;
-INSERT INTO t2 VALUES(3,4,'accusantium doloremque laudantium');
+COMMIT;
 # Kill the server
 disconnect ddl;
 # restart

mysql-test/suite/innodb/r/monitor.result

@@ -416,7 +416,7 @@ max_count_reset, min_count_reset, count_reset, status
 from information_schema.innodb_metrics
 where name like "metadata%";
 name	max_count	min_count	count	max_count_reset	min_count_reset	count_reset	status
-metadata_table_handles_opened	2	NULL	2	2	NULL	2	enabled
+metadata_table_handles_opened	1	NULL	1	1	NULL	1	enabled
 metadata_table_handles_closed	1	NULL	1	1	NULL	1	enabled
 metadata_table_reference_count	NULL	NULL	0	NULL	NULL	0	disabled
 set global innodb_monitor_disable = module_metadata;
@@ -426,7 +426,7 @@ max_count_reset, min_count_reset, count_reset, status
 from information_schema.innodb_metrics
 where name like "metadata%";
 name	max_count	min_count	count	max_count_reset	min_count_reset	count_reset	status
-metadata_table_handles_opened	2	NULL	2	NULL	NULL	0	disabled
+metadata_table_handles_opened	1	NULL	1	NULL	NULL	0	disabled
 metadata_table_handles_closed	1	NULL	1	NULL	NULL	0	disabled
 metadata_table_reference_count	NULL	NULL	0	NULL	NULL	0	disabled
 set global innodb_monitor_reset_all = module_metadata;

mysql-test/suite/innodb/t/innodb-wl5522.test

@@ -312,8 +312,11 @@ EOF
 # This is really a name mismatch error, need better error codes.
 -- error ER_TABLE_SCHEMA_MISMATCH
 ALTER TABLE t1 IMPORT TABLESPACE;
-
+--error ER_TABLESPACE_DISCARDED
+select count(*) from t1;
 ALTER TABLE t1 DROP INDEX x;
+--error ER_CANT_DROP_FIELD_OR_KEY
+ALTER TABLE t1 DROP INDEX x, ALGORITHM=copy;
 ALTER TABLE t1 ADD INDEX idx(c2);
 
 perl;

mysql-test/suite/innodb/t/instant_alter_crash.test

@@ -17,9 +17,10 @@ CREATE TABLE t1(id INT PRIMARY KEY, c2 INT UNIQUE)
 ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
 CREATE TABLE t2 LIKE t1;
 INSERT INTO t1 VALUES(0,2);
-BEGIN;
 INSERT INTO t2 VALUES(2,1);
 ALTER TABLE t2 ADD COLUMN (c3 TEXT NOT NULL DEFAULT 'De finibus bonorum');
+BEGIN;
+INSERT INTO t2 VALUES(3,4,'accusantium doloremque laudantium');
 
 connect ddl, localhost, root;
 SET DEBUG_SYNC='innodb_alter_inplace_before_commit SIGNAL ddl WAIT_FOR ever';
@@ -29,7 +30,7 @@ ALTER TABLE t1 ADD COLUMN (c3 TEXT NOT NULL DEFAULT ' et malorum');
 connection default;
 SET DEBUG_SYNC='now WAIT_FOR ddl';
 SET GLOBAL innodb_flush_log_at_trx_commit=1;
-INSERT INTO t2 VALUES(3,4,'accusantium doloremque laudantium');
+COMMIT;
 
 --source include/kill_mysqld.inc
 disconnect ddl;

mysql-test/suite/innodb_zip/r/wl5522_debug_zip.result

@@ -503,8 +503,6 @@ SELECT COUNT(*) FROM test_wl5522.t1;
 ERROR HY000: Tablespace has been discarded for table `t1`
 SET SESSION debug_dbug="+d,ib_import_create_index_failure_1";
 ALTER TABLE test_wl5522.t1 ADD INDEX idx(c1);
-Warnings:
-Warning	1814	Tablespace has been discarded for table `t1`
 SET SESSION debug_dbug=@saved_debug_dbug;
 DROP TABLE test_wl5522.t1;
 unlink: t1.ibd

mysql-test/suite/innodb_zip/r/wl5522_zip.result

@@ -265,13 +265,13 @@ restore: t1 .ibd and .cfg files
 ALTER TABLE t1 IMPORT TABLESPACE;
 ERROR HY000: Schema mismatch (Index x not found in tablespace meta-data file.)
 ALTER TABLE t1 DROP INDEX x;
-Warnings:
-Warning	1814	Tablespace has been discarded for table `t1`
 ALTER TABLE t1 ADD INDEX idx(c2);
 Warnings:
 Warning	1814	Tablespace has been discarded for table `t1`
 restore: t1 .ibd and .cfg files
 ALTER TABLE t1 IMPORT TABLESPACE;
+Warnings:
+Warning	1814	Tablespace has been discarded for table `t1`
 CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK

sql/ha_partition.cc

@@ -10202,19 +10202,6 @@ end:
 }
 
 
-void ha_partition::notify_table_changed()
-{
-  handler **file;
-
-  DBUG_ENTER("ha_partition::notify_table_changed");
-
-  for (file= m_file; *file; file++)
-    (*file)->ha_notify_table_changed();
-
-  DBUG_VOID_RETURN;
-}
-
-
 uint ha_partition::min_of_the_max_uint(
                        uint (handler::*operator_func)(void) const) const
 {

sql/ha_partition.h

@@ -1388,8 +1388,6 @@ public:
     virtual bool commit_inplace_alter_table(TABLE *altered_table,
                                             Alter_inplace_info *ha_alter_info,
                                             bool commit);
-    virtual void notify_table_changed();
-
   /*
     -------------------------------------------------------------------------
     MODULE tablespace support

sql/handler.h

@@ -1642,6 +1642,14 @@ struct handlerton
    int (*discover_table_structure)(handlerton *hton, THD* thd,
                                    TABLE_SHARE *share, HA_CREATE_INFO *info);
 
+  /*
+    Notify the storage engine that the definition of the table (and the .frm
+    file) has changed. Returns 0 if ok.
+  */
+  int (*notify_tabledef_changed)(handlerton *hton, LEX_CSTRING *db,
+                                 LEX_CSTRING *table_name, LEX_CUSTRING *frm,
+                                 LEX_CUSTRING *org_tabledef_version);
+
    /*
      System Versioning
    */
@@ -4269,7 +4277,7 @@ public:
   *) Update SQL-layer data-dictionary by installing .FRM file for the new version
      of the table.
   *) Inform the storage engine about this change by calling the
-     handler::ha_notify_table_changed() method.
+     hton::notify_table_changed()
   *) Destroy the Alter_inplace_info and handler_ctx objects.
 
  */
@@ -4336,16 +4344,6 @@ public:
                                     bool commit);
 
 
- /**
-    Public function wrapping the actual handler call.
-    @see notify_table_changed()
- */
- void ha_notify_table_changed()
- {
-   notify_table_changed();
- }
-
-
 protected:
  /**
     Allows the storage engine to update internal structures with concurrent
@@ -4444,14 +4442,6 @@ protected:
   return false;
 }
 
-
- /**
-    Notify the storage engine that the table structure (.FRM) has been updated.
-
-    @note No errors are allowed during notify_table_changed().
- */
- virtual void notify_table_changed() { }
-
 public:
  /* End of On-line/in-place ALTER TABLE interface. */
 

sql/sql_table.cc

@@ -7499,11 +7499,10 @@ static bool mysql_inplace_alter_table(THD *thd,
 {
   Open_table_context ot_ctx(thd, MYSQL_OPEN_REOPEN | MYSQL_OPEN_IGNORE_KILLED);
   handlerton *db_type= table->s->db_type();
-  MDL_ticket *mdl_ticket= table->mdl_ticket;
   Alter_info *alter_info= ha_alter_info->alter_info;
   bool reopen_tables= false;
   bool res;
-
+  handlerton *hton;
   DBUG_ENTER("mysql_inplace_alter_table");
 
   /* Downgrade DDL lock while we are waiting for exclusive lock below */
@@ -7709,6 +7708,28 @@ static bool mysql_inplace_alter_table(THD *thd,
     }
   }
 
+  /* Notify the engine that the table definition has changed */
+
+  hton= table->file->ht;
+  if (hton->notify_tabledef_changed)
+  {
+    char db_buff[FN_REFLEN], table_buff[FN_REFLEN];
+    LEX_CSTRING tmp_db, tmp_table;
+    tmp_db.str=    db_buff;
+    tmp_table.str= table_buff;
+    tmp_db.length=    tablename_to_filename(table_list->db.str,
+                                         db_buff, sizeof(db_buff));
+    tmp_table.length= tablename_to_filename(table_list->table_name.str,
+                                            table_buff, sizeof(table_buff));
+    if ((hton->notify_tabledef_changed)(hton, &tmp_db, &tmp_table,
+                                        table->s->frm_image,
+                                        &table->s->tabledef_version))
+    {
+      my_error(HA_ERR_INCOMPATIBLE_DEFINITION, MYF(0));
+      DBUG_RETURN(true);
+    }
+  }
+
   close_all_tables_for_name(thd, table->s,
                             alter_ctx->is_table_renamed() ?
                             HA_EXTRA_PREPARE_FOR_RENAME :
@@ -7733,24 +7754,6 @@ static bool mysql_inplace_alter_table(THD *thd,
     DBUG_RETURN(true);
   }
 
-  table_list->mdl_request.ticket= mdl_ticket;
-  if (open_table(thd, table_list, &ot_ctx))
-    DBUG_RETURN(true);
-
-  /*
-    Tell the handler that the changed frm is on disk and table
-    has been re-opened
-  */
-  table_list->table->file->ha_notify_table_changed();
-
-  /*
-    We might be going to reopen table down on the road, so we have to
-    restore state of the TABLE object which we used for obtaining of
-    handler object to make it usable for later reopening.
-  */
-  close_thread_table(thd, &thd->open_tables);
-  table_list->table= NULL;
-
   // Rename altered table if requested.
   if (alter_ctx->is_table_renamed())
   {

storage/mroonga/ha_mroonga.cpp

@@ -15514,34 +15514,6 @@ bool ha_mroonga::commit_inplace_alter_table(
   }
   DBUG_RETURN(result);
 }
-
-void ha_mroonga::wrapper_notify_table_changed()
-{
-  MRN_DBUG_ENTER_METHOD();
-  MRN_SET_WRAP_SHARE_KEY(share, table->s);
-  MRN_SET_WRAP_TABLE_KEY(this, table);
-  wrap_handler->ha_notify_table_changed();
-  MRN_SET_BASE_SHARE_KEY(share, table->s);
-  MRN_SET_BASE_TABLE_KEY(this, table);
-  DBUG_VOID_RETURN;
-}
-
-void ha_mroonga::storage_notify_table_changed()
-{
-  MRN_DBUG_ENTER_METHOD();
-  DBUG_VOID_RETURN;
-}
-
-void ha_mroonga::notify_table_changed()
-{
-  MRN_DBUG_ENTER_METHOD();
-  if (share->wrapper_mode) {
-    wrapper_notify_table_changed();
-  } else {
-    storage_notify_table_changed();
-  }
-  DBUG_VOID_RETURN;
-}
 #else
 alter_table_operations ha_mroonga::wrapper_alter_table_flags(alter_table_operations flags)
 {

storage/mroonga/ha_mroonga.hpp

@@ -641,7 +641,6 @@ protected:
   bool commit_inplace_alter_table(TABLE *altered_table,
                                   Alter_inplace_info *ha_alter_info,
                                   bool commit);
-  void notify_table_changed();
 #endif
 
 private:
@@ -1201,8 +1200,6 @@ private:
   bool storage_commit_inplace_alter_table(TABLE *altered_table,
                                           Alter_inplace_info *ha_alter_info,
                                           bool commit);
-  void wrapper_notify_table_changed();
-  void storage_notify_table_changed();
 #else
   alter_table_operations wrapper_alter_table_flags(alter_table_operations flags);
   alter_table_operations storage_alter_table_flags(alter_table_operations flags);