SQL, IB: unversioned fields with ALTER TABLE [fixes #401]

mysql-test/suite/versioning/r/alter.result

@@ -512,5 +512,10 @@ alter table t add system versioning;
 ERROR HY000: Table `t` is already system-versioned table
 alter table t add system versioning, drop system versioning;
 ERROR HY000: Table `t` is already system-versioned table
+set @@versioning_alter_history=keep;
+create or replace table t(x int, y int) with system versioning engine=innodb;
+alter table t modify y int without system versioning;
+insert into t values(1, 1);
+update t set y=2;
 drop database test;
 create database test;

mysql-test/suite/versioning/t/alter.test

@@ -349,5 +349,11 @@ alter table t add system versioning;
 --error ER_VERS_ALREADY_VERSIONED
 alter table t add system versioning, drop system versioning;
 
+set @@versioning_alter_history=keep;
+create or replace table t(x int, y int) with system versioning engine=innodb;
+alter table t modify y int without system versioning;
+insert into t values(1, 1);
+update t set y=2;
+
 drop database test;
 create database test;

sql/handler.h

@@ -2168,6 +2168,8 @@ class Alter_inplace_info
 
   static const HA_ALTER_FLAGS ALTER_DROP_HISTORICAL      = 1ULL << 41;
 
+  static const HA_ALTER_FLAGS ALTER_COLUMN_UNVERSIONED   = 1ULL << 42;
+
   /**
     Create options (like MAX_ROWS) for the new version of table.
 

sql/sql_alter.h

@@ -95,7 +95,8 @@ class Alter_info
     // Set for ADD [COLUMN] FIRST | AFTER
     ALTER_COLUMN_ORDER          = 1L << 25,
     ALTER_ADD_CHECK_CONSTRAINT  = 1L << 27,
-    ALTER_DROP_CHECK_CONSTRAINT = 1L << 28
+    ALTER_DROP_CHECK_CONSTRAINT = 1L << 28,
+    ALTER_COLUMN_UNVERSIONED    = 1L << 29,
   };
 
   enum enum_enable_or_disable { LEAVE_AS_IS, ENABLE, DISABLE };

sql/sql_table.cc

@@ -6562,6 +6562,8 @@ static bool fill_alter_inplace_info(THD *thd,
     ha_alter_info->handler_flags|= Alter_inplace_info::ALTER_DROP_CHECK_CONSTRAINT;
   if (thd->variables.vers_alter_history == VERS_ALTER_HISTORY_DROP)
     ha_alter_info->handler_flags|= Alter_inplace_info::ALTER_DROP_HISTORICAL;
+  if (alter_info->flags & Alter_info::ALTER_COLUMN_UNVERSIONED)
+    ha_alter_info->handler_flags|= Alter_inplace_info::ALTER_COLUMN_UNVERSIONED;
 
   /*
     If we altering table with old VARCHAR fields we will be automatically

sql/sql_yacc.yy

@@ -7112,11 +7112,13 @@ serial_attribute:
 with_or_without_system:
         WITH_SYSTEM_SYM
           {
+            Lex->alter_info.flags|= Alter_info::ALTER_COLUMN_UNVERSIONED;
             Lex->create_info.vers_info.versioned_fields= true;
             $$= Column_definition::WITH_VERSIONING;
           }
         | WITHOUT SYSTEM
           {
+            Lex->alter_info.flags|= Alter_info::ALTER_COLUMN_UNVERSIONED;
             Lex->create_info.vers_info.unversioned_fields= true;
             $$= Column_definition::WITHOUT_VERSIONING;
           }

storage/innobase/handler/handler0alter.cc

@@ -87,6 +87,7 @@ static const Alter_inplace_info::HA_ALTER_FLAGS INNOBASE_ALTER_REBUILD
 	/*
 	| Alter_inplace_info::ALTER_STORED_COLUMN_TYPE
 	*/
+	| Alter_inplace_info::ALTER_COLUMN_UNVERSIONED
 	;
 
 /** Operations that require changes to data */