System Versioning pre0.12

Merge remote-tracking branch 'origin/archive/2017-10-17' into 10.3

2 files changed, 243 insertions, 0 deletions

diff --git a/plugin/versioning/CMakeLists.txt b/plugin/versioning/CMakeLists.txt
new file mode 100644
index 00000000000..a4dbc4dc835
--- /dev/null
+++ b/plugin/versioning/CMakeLists.txt
@@ -0,0 +1,17 @@
+# Copyright (c) 2016, MariaDB corporation. All rights reserved.
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+MYSQL_ADD_PLUGIN(versioning versioning.cc RECOMPILE_FOR_EMBEDDED
+  MODULE_ONLY MODULE_OUTPUT_NAME "versioning" COMPONENT Test)
diff --git a/plugin/versioning/versioning.cc b/plugin/versioning/versioning.cc
new file mode 100644
index 00000000000..05ef5def5b8
--- /dev/null
+++ b/plugin/versioning/versioning.cc
@@ -0,0 +1,226 @@
+/* Copyright (c) 2016, MariaDB corporation. All rights
+   reserved.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+#define MYSQL_SERVER 1
+#include <my_global.h>
+#include <mysql_version.h>
+#include <mysqld.h>
+#include <mysql/plugin.h>
+#include "sql_plugin.h"                         // st_plugin_int
+#include "sql_class.h"
+#include "item.h"
+#include "vtq.h"
+#include "vers_utils.h"
+
+plugin_ref innodb_plugin= NULL;
+static handlerton* innodb_hton= NULL;
+
+/* System Versioning: VTQ_TRX_ID(), VTQ_COMMIT_ID(), VTQ_BEGIN_TS(), VTQ_COMMIT_TS(), VTQ_ISO_LEVEL() */
+template <vtq_field_t VTQ_FIELD>
+class Create_func_vtq : public Create_native_func
+{
+public:
+  virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list);
+
+  static Create_func_vtq<VTQ_FIELD> s_singleton;
+
+protected:
+  Create_func_vtq<VTQ_FIELD>() {}
+  virtual ~Create_func_vtq<VTQ_FIELD>() {}
+};
+
+template<vtq_field_t VTQ_FIELD>
+Create_func_vtq<VTQ_FIELD> Create_func_vtq<VTQ_FIELD>::s_singleton;
+
+template <vtq_field_t VTQ_FIELD>
+Item*
+Create_func_vtq<VTQ_FIELD>::create_native(THD *thd, LEX_CSTRING *name,
+  List<Item> *item_list)
+{
+  Item *func= NULL;
+  int arg_count= 0;
+
+  if (item_list != NULL)
+    arg_count= item_list->elements;
+
+  switch (arg_count) {
+  case 1:
+  {
+    Item *param_1= item_list->pop();
+    switch (VTQ_FIELD)
+    {
+    case VTQ_BEGIN_TS:
+    case VTQ_COMMIT_TS:
+      func= new (thd->mem_root) Item_func_vtq_ts(thd, innodb_hton, param_1, VTQ_FIELD);
+      break;
+    case VTQ_TRX_ID:
+    case VTQ_COMMIT_ID:
+    case VTQ_ISO_LEVEL:
+      func= new (thd->mem_root) Item_func_vtq_id(thd, innodb_hton, param_1, VTQ_FIELD);
+      break;
+    default:
+      DBUG_ASSERT(0);
+    }
+    break;
+  }
+  case 2:
+  {
+    Item *param_1= item_list->pop();
+    Item *param_2= item_list->pop();
+    switch (VTQ_FIELD)
+    {
+    case VTQ_TRX_ID:
+    case VTQ_COMMIT_ID:
+      func= new (thd->mem_root) Item_func_vtq_id(thd, innodb_hton, param_1, param_2, VTQ_FIELD);
+      break;
+    default:
+      goto error;
+    }
+    break;
+  }
+  error:
+  default:
+  {
+    my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
+    break;
+  }
+  }
+
+  return func;
+};
+
+template <class Item_func_vtq_trx_seesX>
+class Create_func_vtq_trx_sees : public Create_native_func
+{
+public:
+  virtual Item *create_native(THD *thd, LEX_CSTRING *name, List<Item> *item_list)
+  {
+    Item *func= NULL;
+    int arg_count= 0;
+
+    if (item_list != NULL)
+      arg_count= item_list->elements;
+
+    switch (arg_count) {
+    case 2:
+    {
+      Item *param_1= item_list->pop();
+      Item *param_2= item_list->pop();
+      func= new (thd->mem_root) Item_func_vtq_trx_seesX(thd, innodb_hton, param_1, param_2);
+      break;
+    }
+    default:
+      my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name->str);
+      break;
+    }
+
+    return func;
+  }
+
+  static Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX> s_singleton;
+
+protected:
+  Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX>() {}
+  virtual ~Create_func_vtq_trx_sees<Item_func_vtq_trx_seesX>() {}
+};
+
+template<class X>
+Create_func_vtq_trx_sees<X> Create_func_vtq_trx_sees<X>::s_singleton;
+
+#define BUILDER(F) & F::s_singleton
+
+static Native_func_registry func_array[] =
+{
+  { { C_STRING_WITH_LEN("VTQ_BEGIN_TS") }, BUILDER(Create_func_vtq<VTQ_BEGIN_TS>)},
+  { { C_STRING_WITH_LEN("VTQ_COMMIT_ID") }, BUILDER(Create_func_vtq<VTQ_COMMIT_ID>)},
+  { { C_STRING_WITH_LEN("VTQ_COMMIT_TS") }, BUILDER(Create_func_vtq<VTQ_COMMIT_TS>)},
+  { { C_STRING_WITH_LEN("VTQ_ISO_LEVEL") }, BUILDER(Create_func_vtq<VTQ_ISO_LEVEL>)},
+  { { C_STRING_WITH_LEN("VTQ_TRX_ID") }, BUILDER(Create_func_vtq<VTQ_TRX_ID>)},
+  { { C_STRING_WITH_LEN("VTQ_TRX_SEES") }, BUILDER(Create_func_vtq_trx_sees<Item_func_vtq_trx_sees>)},
+  { { C_STRING_WITH_LEN("VTQ_TRX_SEES_EQ") }, BUILDER(Create_func_vtq_trx_sees<Item_func_vtq_trx_sees_eq>)},
+  { {0, 0}, NULL}
+};
+
+
+/*
+  Disable __attribute__() on non-gcc compilers.
+*/
+#if !defined(__attribute__) && !defined(__GNUC__)
+#define __attribute__(A)
+#endif
+
+static int versioning_plugin_init(void *p __attribute__ ((unused)))
+{
+  static LString InnoDB= "InnoDB";
+
+  DBUG_ENTER("versioning_plugin_init");
+  // No need in locking since we so far single-threaded
+  int res= item_create_append(func_array);
+  if (res)
+  {
+    my_message(ER_PLUGIN_IS_NOT_LOADED, "Can't append function array" , MYF(0));
+    DBUG_RETURN(res);
+  }
+
+  innodb_plugin= ha_resolve_by_name(NULL, &InnoDB.lex_cstring(), false);
+  if (!innodb_plugin)
+  {
+    my_error(ER_PLUGIN_IS_NOT_LOADED, MYF(0), InnoDB.ptr());
+    DBUG_RETURN(1);
+  }
+
+  innodb_hton= plugin_hton(innodb_plugin);
+  if (!innodb_hton || (innodb_hton->flags & HTON_NOT_USER_SELECTABLE))
+  {
+    my_message(ER_PLUGIN_IS_NOT_LOADED, "Can't get handlerton" , MYF(0));
+    DBUG_RETURN(1);
+  }
+
+  DBUG_RETURN(0);
+}
+
+static int versioning_plugin_deinit(void *p __attribute__ ((unused)))
+{
+  DBUG_ENTER("versioning_plugin_deinit");
+  if (innodb_plugin)
+    plugin_unlock(NULL, innodb_plugin);
+  DBUG_RETURN(0);
+}
+
+struct st_mysql_daemon versioning_plugin=
+{ MYSQL_REPLICATION_INTERFACE_VERSION  };
+
+/*
+  Plugin library descriptor
+*/
+
+maria_declare_plugin(versioning)
+{
+  MYSQL_REPLICATION_PLUGIN, // initialized after MYSQL_STORAGE_ENGINE_PLUGIN
+  &versioning_plugin,
+  "versioning",
+  "MariaDB Corp",
+  "System Vesioning testing features",
+  PLUGIN_LICENSE_GPL,
+  versioning_plugin_init, /* Plugin Init */
+  versioning_plugin_deinit, /* Plugin Deinit */
+  0x0100 /* 1.0 */,
+  NULL,                       /* status variables                */
+  NULL,                       /* system variables                */
+  "1.0",                      /* string version */
+  MariaDB_PLUGIN_MATURITY_EXPERIMENTAL /* maturity */
+}
+maria_declare_plugin_end;