virtual columns:

 * move a capability from a virtual handler method to table_flags()
 * rephrase error messages to avoid hard-coded English parts
 * admit in test cases that they need xtradb, not innodb

mysql-test/suite/vcol/t/rpl_vcol.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_blocked_sql_funcs_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_column_def_options_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_handler_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_ins_upd_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_keys_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_non_stored_columns_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_partition_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_select_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_supported_sql_funcs_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_trigger_sp_innodb.test:
  this test needs xtradb, it will fail with innodb
mysql-test/suite/vcol/t/vcol_view_innodb.test:
  this test needs xtradb, it will fail with innodb
sql/ha_partition.h:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
sql/handler.h:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
sql/share/errmsg.txt:
  no hard-coded english parts in the error messages (ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN)
sql/sql_table.cc:
  no hard-coded english parts in the error messages
sql/table.cc:
  * check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
  * no "csv workaround" is needed
  * no hard-coded english parts in the error messages
storage/maria/ha_maria.cc:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
storage/maria/ha_maria.h:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
storage/myisam/ha_myisam.cc:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
storage/myisam/ha_myisam.h:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
storage/xtradb/handler/ha_innodb.cc:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS
storage/xtradb/handler/ha_innodb.h:
  check_if_supported_virtual_columns() -> HA_CAN_VIRTUAL_COLUMNS

mysql-test/include/have_xtradb.inc

-disable_query_log;
---require r/true.require
-SELECT (plugin_description LIKE '%xtradb%') AS `TRUE` FROM information_schema.plugins WHERE LOWER(plugin_name) = 'innodb' AND LOWER(plugin_status) = 'active';
-enable_query_log;
+if (!`SELECT count(*) FROM information_schema.plugins WHERE
+      plugin_name = 'innodb' AND plugin_status = 'active' AND
+      plugin_description LIKE '%xtradb%'`){
+  skip Need XtraDB engine;
+}

mysql-test/include/have_xtradb.opt

+--loose-innodb
+--plugin-load=$HA_XTRADB_SO

mysql-test/r/log_tables.result

@@ -248,13 +248,13 @@ set global slow_query_log='OFF';
 set @save_storage_engine= @@session.storage_engine;
 set storage_engine= MEMORY;
 alter table mysql.slow_log engine=ndb;
-ERROR HY000: This storage engine cannot be used for log tables"
+ERROR HY000: This storage engine cannot be used for log tables
 alter table mysql.slow_log engine=innodb;
-ERROR HY000: This storage engine cannot be used for log tables"
+ERROR HY000: This storage engine cannot be used for log tables
 alter table mysql.slow_log engine=archive;
-ERROR HY000: This storage engine cannot be used for log tables"
+ERROR HY000: This storage engine cannot be used for log tables
 alter table mysql.slow_log engine=blackhole;
-ERROR HY000: This storage engine cannot be used for log tables"
+ERROR HY000: This storage engine cannot be used for log tables
 set storage_engine= @save_storage_engine;
 drop table mysql.slow_log;
 drop table mysql.general_log;

mysql-test/r/plugin.result

@@ -75,9 +75,9 @@ SET SQL_MODE='IGNORE_BAD_TABLE_OPTIONS';
 #illegal value fixed
 CREATE TABLE t1 (a int) ENGINE=example ULL=10000000000000000000 one_or_two='ttt' YESNO=SSS;
 Warnings:
-Warning	1652	Incorrect value '10000000000000000000' for option 'ULL'
-Warning	1652	Incorrect value 'ttt' for option 'one_or_two'
-Warning	1652	Incorrect value 'SSS' for option 'YESNO'
+Warning	1653	Incorrect value '10000000000000000000' for option 'ULL'
+Warning	1653	Incorrect value 'ttt' for option 'one_or_two'
+Warning	1653	Incorrect value 'SSS' for option 'YESNO'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/r/table_options.result

@@ -3,9 +3,9 @@ SET @OLD_SQL_MODE=@@SQL_MODE;
 SET SQL_MODE='IGNORE_BAD_TABLE_OPTIONS';
 create table t1 (a int fkey=vvv, key akey (a) dff=vvv) tkey1='1v1';
 Warnings:
-Warning	1651	Unknown option 'fkey'
-Warning	1651	Unknown option 'dff'
-Warning	1651	Unknown option 'tkey1'
+Warning	1652	Unknown option 'fkey'
+Warning	1652	Unknown option 'dff'
+Warning	1652	Unknown option 'tkey1'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -16,10 +16,10 @@ drop table t1;
 #reassiginig options in the same line
 create table t1 (a int fkey=vvv, key akey (a) dff=vvv) tkey1=1v1 TKEY1=DEFAULT tkey1=1v2 tkey2=2v1;
 Warnings:
-Warning	1651	Unknown option 'fkey'
-Warning	1651	Unknown option 'dff'
-Warning	1651	Unknown option 'tkey1'
-Warning	1651	Unknown option 'tkey2'
+Warning	1652	Unknown option 'fkey'
+Warning	1652	Unknown option 'dff'
+Warning	1652	Unknown option 'tkey1'
+Warning	1652	Unknown option 'tkey2'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -29,7 +29,7 @@ t1	CREATE TABLE `t1` (
 #add option
 alter table t1 tkey4=4v1;
 Warnings:
-Warning	1651	Unknown option 'tkey4'
+Warning	1652	Unknown option 'tkey4'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -39,8 +39,8 @@ t1	CREATE TABLE `t1` (
 #remove options 
 alter table t1 tkey3=DEFAULT tkey4=DEFAULT;
 Warnings:
-Warning	1651	Unknown option 'tkey3'
-Warning	1651	Unknown option 'tkey4'
+Warning	1652	Unknown option 'tkey3'
+Warning	1652	Unknown option 'tkey4'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -50,11 +50,11 @@ t1	CREATE TABLE `t1` (
 drop table t1;
 create table t1 (a int fkey1=v1, key akey (a) kkey1=v1) tkey1=1v1 tkey1=1v2 TKEY1=DEFAULT tkey2=2v1 tkey3=3v1;
 Warnings:
-Warning	1651	Unknown option 'fkey1'
-Warning	1651	Unknown option 'kkey1'
-Warning	1651	Unknown option 'TKEY1'
-Warning	1651	Unknown option 'tkey2'
-Warning	1651	Unknown option 'tkey3'
+Warning	1652	Unknown option 'fkey1'
+Warning	1652	Unknown option 'kkey1'
+Warning	1652	Unknown option 'TKEY1'
+Warning	1652	Unknown option 'tkey2'
+Warning	1652	Unknown option 'tkey3'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -64,7 +64,7 @@ t1	CREATE TABLE `t1` (
 #change field with option with the same value
 alter table t1 change a a int `FKEY1`='v1';
 Warnings:
-Warning	1651	Unknown option 'FKEY1'
+Warning	1652	Unknown option 'FKEY1'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -74,7 +74,7 @@ t1	CREATE TABLE `t1` (
 #change field with option with a different value
 alter table t1 change a a int fkey1=v2;
 Warnings:
-Warning	1651	Unknown option 'fkey1'
+Warning	1652	Unknown option 'fkey1'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -93,7 +93,7 @@ t1	CREATE TABLE `t1` (
 #new key with options
 alter table t1 add key bkey (b) kkey2=v1;
 Warnings:
-Warning	1651	Unknown option 'kkey2'
+Warning	1652	Unknown option 'kkey2'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -105,8 +105,8 @@ t1	CREATE TABLE `t1` (
 #new column with options
 alter table t1 add column c int fkey1=v1 fkey2=v2;
 Warnings:
-Warning	1651	Unknown option 'fkey1'
-Warning	1651	Unknown option 'fkey2'
+Warning	1652	Unknown option 'fkey1'
+Warning	1652	Unknown option 'fkey2'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -141,7 +141,7 @@ t1	CREATE TABLE `t1` (
 #add column with options after delete
 alter table t1 add column b int fkey2=v1;
 Warnings:
-Warning	1651	Unknown option 'fkey2'
+Warning	1652	Unknown option 'fkey2'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -154,7 +154,7 @@ t1	CREATE TABLE `t1` (
 #add key 
 alter table t1 add key bkey (b) kkey2=v2;
 Warnings:
-Warning	1651	Unknown option 'kkey2'
+Warning	1652	Unknown option 'kkey2'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -168,7 +168,7 @@ t1	CREATE TABLE `t1` (
 drop table t1;
 create table t1 (a int) tkey1=100;
 Warnings:
-Warning	1651	Unknown option 'tkey1'
+Warning	1652	Unknown option 'tkey1'
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/suite/vcol/inc/vcol_unsupported_storage_engines.inc

@@ -13,9 +13,9 @@
 # Change: Syntax changed
 ################################################################################
 
---error ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
+--error ER_UNSUPPORTED_ENGINE_FOR_VIRTUAL_COLUMNS
 create table t1 (a int, b int as (a+1));
-create table t1 (a int);
---error ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
+create table t1 (a int not null);
+--error ER_UNSUPPORTED_ENGINE_FOR_VIRTUAL_COLUMNS
 alter table t1 add column b int as (a+1);
 drop table t1;

mysql-test/suite/vcol/r/vcol_archive.result

 SET @@session.storage_engine = 'archive';
 create table t1 (a int, b int as (a+1));
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
-create table t1 (a int);
+ERROR HY000: ARCHIVE storage engine does not support computed columns
+create table t1 (a int not null);
 alter table t1 add column b int as (a+1);
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: ARCHIVE storage engine does not support computed columns
 drop table t1;

mysql-test/suite/vcol/r/vcol_blackhole.result

 SET @@session.storage_engine = 'blackhole';
 create table t1 (a int, b int as (a+1));
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
-create table t1 (a int);
+ERROR HY000: BLACKHOLE storage engine does not support computed columns
+create table t1 (a int not null);
 alter table t1 add column b int as (a+1);
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: BLACKHOLE storage engine does not support computed columns
 drop table t1;

mysql-test/suite/vcol/r/vcol_csv.result

 SET @@session.storage_engine = 'CSV';
 create table t1 (a int, b int as (a+1));
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: CSV storage engine does not support computed columns
 create table t1 (a int not null);
 alter table t1 add column b int as (a+1);
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: CSV storage engine does not support computed columns
 drop table t1;

mysql-test/suite/vcol/r/vcol_memory.result

 SET @@session.storage_engine = 'memory';
 create table t1 (a int, b int as (a+1));
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
-create table t1 (a int);
+ERROR HY000: MEMORY storage engine does not support computed columns
+create table t1 (a int not null);
 alter table t1 add column b int as (a+1);
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: MEMORY storage engine does not support computed columns
 drop table t1;

mysql-test/suite/vcol/r/vcol_merge.result

@@ -4,5 +4,5 @@ create table t2 (a int, b int as (a % 10));
 insert into t1 values (1,default);
 insert into t2 values (2,default);
 create table t3 (a int, b int as (a % 10)) engine=MERGE UNION=(t1,t2);
-ERROR HY000: 'Specified storage engine' is not yet supported for computed columns
+ERROR HY000: MRG_MYISAM storage engine does not support computed columns
 drop table t1,t2;

mysql-test/suite/vcol/r/vcol_non_stored_columns_innodb.result

@@ -76,7 +76,7 @@ drop table t1;
 # Case 7. ALTER. Modify virtual stored -> virtual non-stored
 create table t1 (a int, b int as (a % 2) persistent);
 alter table t1 modify b int as (a % 2);
-ERROR HY000: 'Changing the STORED status' is not yet supported for computed columns
+ERROR HY000: This is not yet supported for computed columns
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -87,7 +87,7 @@ drop table t1;
 # Case 8. ALTER. Modify virtual non-stored -> virtual stored
 create table t1 (a int, b int as (a % 2));
 alter table t1 modify b int as (a % 2) persistent;
-ERROR HY000: 'Changing the STORED status' is not yet supported for computed columns
+ERROR HY000: This is not yet supported for computed columns
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/suite/vcol/r/vcol_non_stored_columns_myisam.result

@@ -76,7 +76,7 @@ drop table t1;
 # Case 7. ALTER. Modify virtual stored -> virtual non-stored
 create table t1 (a int, b int as (a % 2) persistent);
 alter table t1 modify b int as (a % 2);
-ERROR HY000: 'Changing the STORED status' is not yet supported for computed columns
+ERROR HY000: This is not yet supported for computed columns
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -87,7 +87,7 @@ drop table t1;
 # Case 8. ALTER. Modify virtual non-stored -> virtual stored
 create table t1 (a int, b int as (a % 2));
 alter table t1 modify b int as (a % 2) persistent;
-ERROR HY000: 'Changing the STORED status' is not yet supported for computed columns
+ERROR HY000: This is not yet supported for computed columns
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/suite/vcol/t/rpl_vcol.test

@@ -27,7 +27,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 SET @@session.storage_engine = 'InnoDB';
 
 #------------------------------------------------------------------------------#

mysql-test/suite/vcol/t/vcol_blocked_sql_funcs_innodb.test

@@ -32,7 +32,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 let $skip_full_text_checks = 1;

mysql-test/suite/vcol/t/vcol_column_def_options_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_csv.test

@@ -41,13 +41,7 @@ SET @@session.storage_engine = 'CSV';
 # Execute the tests to be applied to all storage engines
 
 #------------------------------------------------------------------------------#
-# Execute storage engine specific tests
---error ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
-create table t1 (a int, b int as (a+1));
-create table t1 (a int not null);
---error ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
-alter table t1 add column b int as (a+1);
-drop table t1;
+--source suite/vcol/inc/vcol_unsupported_storage_engines.inc
 
 #------------------------------------------------------------------------------#
 # Cleanup

mysql-test/suite/vcol/t/vcol_handler_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_ins_upd_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_keys_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_merge.test

@@ -48,7 +48,7 @@ create table t1 (a int, b int as (a % 10));
 create table t2 (a int, b int as (a % 10));
 insert into t1 values (1,default);
 insert into t2 values (2,default);
---error ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
+--error ER_UNSUPPORTED_ENGINE_FOR_VIRTUAL_COLUMNS
 create table t3 (a int, b int as (a % 10)) engine=MERGE UNION=(t1,t2);
 drop table t1,t2;
 

mysql-test/suite/vcol/t/vcol_non_stored_columns_innodb.test

@@ -35,7 +35,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_partition_innodb.test

@@ -34,7 +34,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_select_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_supported_sql_funcs_innodb.test

@@ -32,7 +32,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_trigger_sp_innodb.test

@@ -34,7 +34,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

mysql-test/suite/vcol/t/vcol_view_innodb.test

@@ -33,7 +33,7 @@
 
 ##### Storage engine to be tested
 # Set the session storage engine
---source include/have_innodb.inc
+--source include/have_xtradb.inc
 eval SET @@session.storage_engine = 'InnoDB';
 
 ##### Workarounds for known open engine specific bugs

sql/ha_partition.h

@@ -253,7 +253,6 @@ public:
     DBUG_RETURN(0);
   }
   virtual void change_table_ptr(TABLE *table_arg, TABLE_SHARE *share);
-  bool check_if_supported_virtual_columns(void) { return TRUE;}
   virtual bool check_if_incompatible_data(HA_CREATE_INFO *create_info,
                                           uint table_changes);
 private:

sql/handler.h

@@ -137,6 +137,7 @@
 #define HA_BINLOG_STMT_CAPABLE (LL(1) << 35)
 /* Has automatic checksums and uses the new checksum format */
 #define HA_HAS_NEW_CHECKSUM    (LL(1) << 36)
+#define HA_CAN_VIRTUAL_COLUMNS (LL(1) << 37)
 
 /*
   Set of all binlog flags. Currently only contain the capabilities
@@ -1955,17 +1956,6 @@ public:
 
   LEX_STRING *engine_name() { return hton_name(ht); }
 
-  /*
-    @brief
-    Check whether the engine supports virtual columns
-    
-    @retval
-      FALSE   if the engine does not support virtual columns    
-    @retval
-      TRUE    if the engine supports virtual columns
-  */
-  virtual bool check_if_supported_virtual_columns(void) { return FALSE;}
-
 protected:
   /* deprecated, don't use in new engines */
   inline void ha_statistic_increment(ulong SSV::*offset) const { }

sql/share/errmsg.txt

@@ -6017,7 +6017,7 @@ ER_ONLY_INTEGERS_ALLOWED
         eng "Only integers allowed as number here"
         ger "An dieser Stelle sind nur Ganzzahlen zulssig"
 ER_UNSUPORTED_LOG_ENGINE
-        eng "This storage engine cannot be used for log tables""
+        eng "This storage engine cannot be used for log tables"
         ger "Diese Speicher-Engine kann fr Logtabellen nicht verwendet werden"
 ER_BAD_LOG_STATEMENT
         eng "You cannot '%s' a log table if logging is enabled"
@@ -6236,13 +6236,15 @@ ER_WARNING_NON_DEFAULT_VALUE_FOR_VIRTUAL_COLUMN
         eng "The value specified for computed column '%s' in table '%s' ignored"
 
 ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN
-        eng "'%s' is not yet supported for computed columns"
+        eng "This is not yet supported for computed columns"
 
 ER_CONST_EXPR_IN_VCOL
         eng "Constant expression in computed column function is not allowed"
 
 ER_ROW_EXPR_FOR_VCOL
         eng "Expression for computed column cannot return a row"
+ER_UNSUPPORTED_ENGINE_FOR_VIRTUAL_COLUMNS
+        eng "%s storage engine does not support computed columns"
 ER_UNKNOWN_OPTION
         eng "Unknown option '%-.64s'"
 ER_BAD_OPTION_VALUE

sql/sql_table.cc

@@ -6280,9 +6280,7 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
       def->field=field;
       if (field->stored_in_db != def->stored_in_db)
       {
-        my_error(ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN,
-                 MYF(0),
-                 "Changing the STORED status");
+        my_error(ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN, MYF(0));
         goto err;
       }
       if (!def->after)

sql/table.cc

@@ -2337,14 +2337,11 @@ partititon_err:
 
   /* Check virtual columns against table's storage engine. */
   if (share->vfields && 
-        ((outparam->file && 
-          !outparam->file->check_if_supported_virtual_columns()) ||
-	 (!outparam->file && share->db_type() && 
-	   share->db_type()->db_type == DB_TYPE_CSV_DB))) // Workaround for CSV
-  {
-    my_error(ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN,
-             MYF(0), 
-             "Specified storage engine");
+        !(outparam->file && 
+          (outparam->file->ha_table_flags() & HA_CAN_VIRTUAL_COLUMNS)))
+  {
+    my_error(ER_UNSUPPORTED_ENGINE_FOR_VIRTUAL_COLUMNS, MYF(0),
+             plugin_name(share->db_plugin)->str);
     error_reported= TRUE;
     goto err;
   }

storage/maria/ha_maria.cc

@@ -821,7 +821,7 @@ int_table_flags(HA_NULL_IN_KEY | HA_CAN_FULLTEXT | HA_CAN_SQL_HANDLER |
                 HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE |
                 HA_DUPLICATE_POS | HA_CAN_INDEX_BLOBS | HA_AUTO_PART_KEY |
                 HA_FILE_BASED | HA_CAN_GEOMETRY | CANNOT_ROLLBACK_FLAG |
-                HA_CAN_BIT_FIELD | HA_CAN_RTREEKEYS |
+                HA_CAN_BIT_FIELD | HA_CAN_RTREEKEYS | HA_CAN_VIRTUAL_COLUMNS |
                 HA_HAS_RECORDS | HA_STATS_RECORDS_IS_EXACT),
 can_enable_indexes(1), bulk_insert_single_undo(BULK_INSERT_NONE)
 {}

storage/maria/ha_maria.h

@@ -143,7 +143,6 @@ public:
   int assign_to_keycache(THD * thd, HA_CHECK_OPT * check_opt);
   int preload_keys(THD * thd, HA_CHECK_OPT * check_opt);
   bool check_if_incompatible_data(HA_CREATE_INFO * info, uint table_changes);
-  bool check_if_supported_virtual_columns(void) { return TRUE;}
 #ifdef HAVE_REPLICATION
   int dump(THD * thd, int fd);
   int net_read_dump(NET * net);

storage/myisam/ha_myisam.cc

@@ -545,6 +545,7 @@ ha_myisam::ha_myisam(handlerton *hton, TABLE_SHARE *table_arg)
   :handler(hton, table_arg), file(0),
   int_table_flags(HA_NULL_IN_KEY | HA_CAN_FULLTEXT | HA_CAN_SQL_HANDLER |
                   HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE |
+                  HA_CAN_VIRTUAL_COLUMNS |
                   HA_DUPLICATE_POS | HA_CAN_INDEX_BLOBS | HA_AUTO_PART_KEY |
                   HA_FILE_BASED | HA_CAN_GEOMETRY | HA_NO_TRANSACTIONS |
                   HA_CAN_INSERT_DELAYED | HA_CAN_BIT_FIELD | HA_CAN_RTREEKEYS |

storage/myisam/ha_myisam.h

@@ -133,7 +133,6 @@ class ha_myisam: public handler
   int assign_to_keycache(THD* thd, HA_CHECK_OPT* check_opt);
   int preload_keys(THD* thd, HA_CHECK_OPT* check_opt);
   bool check_if_incompatible_data(HA_CREATE_INFO *info, uint table_changes);
-  bool check_if_supported_virtual_columns(void) { return TRUE;}
 #ifdef HAVE_REPLICATION
   int dump(THD* thd, int fd);
   int net_read_dump(NET* net);

storage/xtradb/handler/ha_innodb.cc

@@ -1471,7 +1471,7 @@ UNIV_INTERN
 ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg)
   :handler(hton, table_arg),
   int_table_flags(HA_REC_NOT_IN_SEQ |
-		  HA_NULL_IN_KEY |
+		  HA_NULL_IN_KEY | HA_CAN_VIRTUAL_COLUMNS |
 		  HA_CAN_INDEX_BLOBS |
 		  HA_CAN_SQL_HANDLER |
 		  HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |

storage/xtradb/handler/ha_innodb.h

@@ -222,7 +222,6 @@ class ha_innobase: public handler
 	/** @} */
 	bool check_if_incompatible_data(HA_CREATE_INFO *info,
 					uint table_changes);
-	bool check_if_supported_virtual_columns(void) { return TRUE; }
 };
 
 /* Some accessor functions which the InnoDB plugin needs, but which