1 files changed, 146 insertions, 0 deletions
diff --git a/sql/item_vers.h b/sql/item_vers.h
new file mode 100644
index 00000000..0799d04a
--- /dev/null
+++ b/sql/item_vers.h
@@ -0,0 +1,146 @@
+#ifndef ITEM_VERS_INCLUDED
+#define ITEM_VERS_INCLUDED
+/* Copyright (c) 2017, MariaDB Corporation.
+
+   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 Street, Fifth Floor, Boston, MA  02110-1301, USA */
+
+
+/* System Versioning items */
+
+#ifdef USE_PRAGMA_INTERFACE
+#pragma interface			/* gcc class implementation */
+#endif
+
+class Item_func_history: public Item_bool_func
+{
+public:
+  /*
+     @param    a  Item_field for row_end system field
+  */
+  Item_func_history(THD *thd, Item *a): Item_bool_func(thd, a)
+  {
+    DBUG_ASSERT(a->type() == Item::FIELD_ITEM);
+  }
+
+  virtual bool val_bool();
+  virtual longlong val_int()
+  {
+    return (val_bool() ? 1 : 0);
+  }
+  bool fix_length_and_dec()
+  {
+    maybe_null= 0;
+    null_value= 0;
+    decimals= 0;
+    max_length= 1;
+    return FALSE;
+  }
+  virtual const char* func_name() const { return "is_history"; }
+  virtual void print(String *str, enum_query_type query_type);
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_history>(thd, this); }
+};
+
+class Item_func_trt_ts: public Item_datetimefunc
+{
+  TR_table::field_id_t trt_field;
+public:
+  Item_func_trt_ts(THD *thd, Item* a, TR_table::field_id_t _trt_field);
+  const char *func_name() const
+  {
+    if (trt_field == TR_table::FLD_BEGIN_TS)
+    {
+      return "trt_begin_ts";
+    }
+    return "trt_commit_ts";
+  }
+  bool get_date(THD *thd, MYSQL_TIME *res, date_mode_t fuzzydate);
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_trt_ts>(thd, this); }
+  bool fix_length_and_dec()
+  { fix_attributes_datetime(decimals); return FALSE; }
+};
+
+class Item_func_trt_id : public Item_longlong_func
+{
+  TR_table::field_id_t trt_field;
+  bool backwards;
+
+  longlong get_by_trx_id(ulonglong trx_id);
+  longlong get_by_commit_ts(MYSQL_TIME &commit_ts, bool backwards);
+
+public:
+  Item_func_trt_id(THD *thd, Item* a, TR_table::field_id_t _trt_field, bool _backwards= false);
+  Item_func_trt_id(THD *thd, Item* a, Item* b, TR_table::field_id_t _trt_field);
+
+  const char *func_name() const
+  {
+    switch (trt_field)
+    {
+    case TR_table::FLD_TRX_ID:
+      return "trt_trx_id";
+    case TR_table::FLD_COMMIT_ID:
+        return "trt_commit_id";
+    case TR_table::FLD_ISO_LEVEL:
+      return "trt_iso_level";
+    default:
+      DBUG_ASSERT(0);
+    }
+    return NULL;
+  }
+
+  bool fix_length_and_dec()
+  {
+    bool res= Item_int_func::fix_length_and_dec();
+    max_length= 20;
+    return res;
+  }
+
+  longlong val_int();
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_trt_id>(thd, this); }
+};
+
+class Item_func_trt_trx_sees : public Item_bool_func
+{
+protected:
+  bool accept_eq;
+
+public:
+  Item_func_trt_trx_sees(THD *thd, Item* a, Item* b);
+  const char *func_name() const
+  {
+    return "trt_trx_sees";
+  }
+  longlong val_int();
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_trt_trx_sees>(thd, this); }
+};
+
+class Item_func_trt_trx_sees_eq :
+  public Item_func_trt_trx_sees
+{
+public:
+  Item_func_trt_trx_sees_eq(THD *thd, Item* a, Item* b) :
+    Item_func_trt_trx_sees(thd, a, b)
+  {
+    accept_eq= true;
+  }
+  const char *func_name() const
+  {
+    return "trt_trx_sees_eq";
+  }
+};
+
+#endif /* ITEM_VERS_INCLUDED */