Merge of changes from the main tree to tree for WL#1218 "Triggers".

sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/lex.h:
  Auto merged
sql/parse_file.cc:
  Auto merged
sql/sp_head.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_delete.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/table.h:
  Auto merged
include/mysqld_error.h:
  Manual merge.
sql/mysql_priv.h:
  Manual merge.
sql/share/czech/errmsg.txt:
  Manual merge.
sql/share/danish/errmsg.txt:
  Manual merge.
sql/share/dutch/errmsg.txt:
  Manual merge.
sql/share/english/errmsg.txt:
  Manual merge.
sql/share/estonian/errmsg.txt:
  Manual merge.
sql/share/french/errmsg.txt:
  Manual merge.
sql/share/german/errmsg.txt:
  Manual merge.
sql/share/greek/errmsg.txt:
  Manual merge.
sql/share/hungarian/errmsg.txt:
  Manual merge.
sql/share/italian/errmsg.txt:
  Manual merge.
sql/share/japanese/errmsg.txt:
  Manual merge.
sql/share/korean/errmsg.txt:
  Manual merge.
sql/share/norwegian-ny/errmsg.txt:
  Manual merge.
sql/share/norwegian/errmsg.txt:
  Manual merge.
sql/share/polish/errmsg.txt:
  Manual merge.
sql/share/portuguese/errmsg.txt:
  Manual merge.
sql/share/romanian/errmsg.txt:
  Manual merge.
sql/share/russian/errmsg.txt:
  Manual merge.
sql/share/serbian/errmsg.txt:
  Manual merge.
sql/share/slovak/errmsg.txt:
  Manual merge.
sql/share/spanish/errmsg.txt:
  Manual merge.
sql/share/swedish/errmsg.txt:
  Manual merge.
sql/share/ukrainian/errmsg.txt:
  Manual merge.
sql/sp_head.cc:
  Manual merge.

1 files changed, 66 insertions, 0 deletions

diff --git a/sql/sp_head.h b/sql/sp_head.h
index c0881661ad1..a253d9edcbe 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -28,6 +28,7 @@
 // in the CREATE TABLE command.
 #define TYPE_ENUM_FUNCTION  1
 #define TYPE_ENUM_PROCEDURE 2
+#define TYPE_ENUM_TRIGGER   3
 
 Item_result
 sp_map_result_type(enum enum_field_types type);
@@ -377,6 +378,71 @@ private:
 }; // class sp_instr_set : public sp_instr
 
 
+/*
+  Set user variable instruction.
+  Used in functions and triggers to set user variables because we don't
+  want use sp_instr_stmt + "SET @a:=..." statement in this case since
+  latter will close all tables and thus will ruin execution of statement
+  calling/invoking this function/trigger.
+*/
+class sp_instr_set_user_var : public sp_instr
+{
+  sp_instr_set_user_var(const sp_instr_set_user_var &);
+  void operator=(sp_instr_set_user_var &);
+
+public:
+
+  sp_instr_set_user_var(uint ip, LEX_STRING var, Item *val)
+    : sp_instr(ip), m_set_var_item(var, val)
+  {}
+
+  virtual ~sp_instr_set_user_var()
+  {}
+
+  virtual int execute(THD *thd, uint *nextp);
+
+  virtual void print(String *str);
+
+private:
+
+  Item_func_set_user_var m_set_var_item;
+}; // class sp_instr_set_user_var : public sp_instr
+
+
+/*
+  Set NEW/OLD row field value instruction. Used in triggers.
+*/
+class sp_instr_set_trigger_field : public sp_instr
+{
+  sp_instr_set_trigger_field(const sp_instr_set_trigger_field &);
+  void operator=(sp_instr_set_trigger_field &);
+
+public:
+
+  sp_instr_set_trigger_field(uint ip, LEX_STRING field_name, Item *val)
+    : sp_instr(ip),
+      trigger_field(Item_trigger_field::NEW_ROW, field_name.str),
+      value(val)
+  {}
+
+  virtual ~sp_instr_set_trigger_field()
+  {}
+
+  virtual int execute(THD *thd, uint *nextp);
+
+  virtual void print(String *str);
+
+  bool setup_field(THD *thd, TABLE *table, enum trg_event_type event)
+  {
+    return trigger_field.setup_field(thd, table, event);
+  }
+private:
+
+  Item_trigger_field trigger_field;
+  Item *value;
+}; // class sp_instr_trigger_field : public sp_instr
+
+
 class sp_instr_jump : public sp_instr
 {
   sp_instr_jump(const sp_instr_jump &);	/* Prevent use of these */