SQL: VTMD for OR REPLACE [fixes #270]

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

@@ -37,7 +37,7 @@ set @start= null;
 select start from tmp_vtmd for system_time all order by start limit 1 into @start;
 select @start > 0 and @start < @inf;
 select
-start + 0 = @start as A_start,
+start >= @start as A_start,
 (@start:= end) and end = @inf as B_end,
 name,
 substr(archive_name, 1, instr(archive_name, '_')) as C_archive_name
@@ -45,12 +45,12 @@ from tmp_vtmd for system_time all;
 drop table tmp_vtmd;
 end~~
 set versioning_alter_history= keep;
-create or replace table t0 (x int) with system versioning;
+create table t0 (z int) with system versioning;
 show tables;
 Tables_in_test
 t0
 set versioning_alter_history= survive;
-create or replace table t0 (x int) with system versioning;
+create or replace table t0 (y int) with system versioning;
 show tables;
 Tables_in_test
 t0
@@ -75,14 +75,18 @@ A_start	B_end	name	C_archive_name
 set versioning_alter_history= keep;
 drop table t0;
 set versioning_alter_history= survive;
-create or replace table t0 (x int) with system versioning;
+create table t0 (x int) with system versioning;
 ERROR HY000: VTMD error: `test.t0_vtmd` exists and not empty!
+drop table t0_vtmd;
+create table t0 (y int) with system versioning;
+create or replace table t0 (x int) with system versioning;
 alter table t0 add column (y int);
 call check_vtmd('t0_vtmd');
 @start > 0 and @start < @inf
 1
 A_start	B_end	name	C_archive_name
 1	0	t0	t0_
+1	0	t0	t0_
 1	1	t0	NULL
 call drop_archives('t0_vtmd');
 drop table t0_vtmd;

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

@@ -46,7 +46,7 @@ begin
   select start from tmp_vtmd for system_time all order by start limit 1 into @start;
   select @start > 0 and @start < @inf;
   select
-    start + 0 = @start as A_start,
+    start >= @start as A_start,
     (@start:= end) and end = @inf as B_end,
     name,
     substr(archive_name, 1, instr(archive_name, '_')) as C_archive_name
@@ -58,10 +58,10 @@ delimiter ;~~
 
 # create
 set versioning_alter_history= keep;
-create or replace table t0 (x int) with system versioning;
+create table t0 (z int) with system versioning;
 show tables;
 set versioning_alter_history= survive;
-create or replace table t0 (x int) with system versioning;
+create or replace table t0 (y int) with system versioning;
 show tables;
 show create table t0_vtmd;
 call check_vtmd('t0_vtmd');
@@ -70,6 +70,10 @@ set versioning_alter_history= keep;
 drop table t0;
 set versioning_alter_history= survive;
 --error ER_VERS_VTMD_ERROR
+create table t0 (x int) with system versioning;
+
+drop table t0_vtmd;
+create table t0 (y int) with system versioning;
 create or replace table t0 (x int) with system versioning;
 
 # alter

sql/mysqld.h

@@ -211,7 +211,7 @@ enum vers_hide_enum
 
 enum vers_alter_history_enum
 {
-  VERS_ALTER_HISTORY_KEEP,
+  VERS_ALTER_HISTORY_KEEP= 0,
   VERS_ALTER_HISTORY_SURVIVE,
   VERS_ALTER_HISTORY_DROP
 };

sql/sql_table.cc

@@ -2438,6 +2438,7 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
     else
     {
       char *end;
+      int frm_delete_error= 0;
       /*
         It could happen that table's share in the table definition cache
         is the only thing that keeps the engine plugin loaded
@@ -2476,7 +2477,8 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
       // Remove extension for delete
       *(end= path + path_length - reg_ext_length)= '\0';
 
-      if (thd->lex->sql_command == SQLCOM_DROP_TABLE &&
+      if ((thd->lex->sql_command == SQLCOM_DROP_TABLE ||
+          thd->lex->sql_command == SQLCOM_CREATE_TABLE) &&
           thd->variables.vers_alter_history == VERS_ALTER_HISTORY_SURVIVE &&
           table_type && table_type != view_pseudo_hton)
       {
@@ -2493,29 +2495,33 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
       drop_table:
         error= ha_delete_table(thd, table_type, path, db, table->table_name,
                               !dont_log_query);
+        if (!error)
+        {
+          /* Delete the table definition file */
+          strmov(end,reg_ext);
+          if (table_type && table_type != view_pseudo_hton &&
+              table_type->discover_table)
+          {
+            /*
+              Table type is using discovery and may not need a .frm file.
+              Delete it silently if it exists
+            */
+            (void) mysql_file_delete(key_file_frm, path, MYF(0));
+          }
+          else if (mysql_file_delete(key_file_frm, path,
+                                                MYF(MY_WME)))
+          {
+            frm_delete_error= my_errno;
+            DBUG_ASSERT(frm_delete_error);
+          }
+        }
       }
 
       if (!error)
       {
-        int frm_delete_error, trigger_drop_error= 0;
-	/* Delete the table definition file */
-	strmov(end,reg_ext);
-        if (table_type && table_type != view_pseudo_hton &&
-            table_type->discover_table)
-        {
-          /*
-            Table type is using discovery and may not need a .frm file.
-            Delete it silently if it exists
-          */
-          (void) mysql_file_delete(key_file_frm, path, MYF(0));
-          frm_delete_error= 0;
-        }
-        else
-          frm_delete_error= mysql_file_delete(key_file_frm, path,
-                                              MYF(MY_WME));
-        if (frm_delete_error)
-          frm_delete_error= my_errno;
-        else
+        int trigger_drop_error= 0;
+
+        if (!frm_delete_error)
         {
           non_tmp_table_deleted= TRUE;
           trigger_drop_error=
@@ -2534,7 +2540,10 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
 
     if (!error && vtmd.exists)
     {
+      enum_sql_command sql_command= thd->lex->sql_command;
+      thd->lex->sql_command= SQLCOM_DROP_TABLE;
       error= vtmd.update(thd);
+      thd->lex->sql_command= sql_command;
       if (error)
         mysql_rename_table(table_type, table->db, vtmd.archive_name(),
                                    table->db, table->table_name, NO_FK_CHECKS);
@@ -5081,6 +5090,9 @@ bool mysql_create_table(THD *thd, TABLE_LIST *create_table,
     VTMD_table vtmd(*create_table);
     if (vtmd.update(thd))
     {
+      thd->variables.vers_alter_history = VERS_ALTER_HISTORY_KEEP;
+      mysql_rm_table_no_locks(thd, create_table, 0, 0, 0, 0, 1, 1);
+      thd->variables.vers_alter_history = VERS_ALTER_HISTORY_SURVIVE;
       result= 1;
       goto err;
     }

sql/vtmd.cc

@@ -237,10 +237,9 @@ VTMD_table::update(THD *thd, const char* archive_name)
     {
 err:
       vtmd->file->print_error(error, MYF(0));
-      goto quit;
     }
-
-    result= false;
+    else
+      result= local_da.is_error();
   }
 
 quit:
@@ -436,6 +435,8 @@ VTMD_rename::try_rename(THD *thd, LString new_db, LString new_alias, const char
   if (lock_table_names(thd, &vtmd_tl, 0, thd->variables.lock_wait_timeout, 0))
     return true;
   tdc_remove_table(thd, TDC_RT_REMOVE_ALL, about.db, vtmd_name, false);
+  if (local_da.is_error()) // just safety check
+    return true;
   bool rc= mysql_rename_table(hton,
     about.db, vtmd_name,
     new_db, vtmd_new_name,