Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/sql/item_row.h b/sql/item_row.h
new file mode 100644
index 00000000..2872a498
--- /dev/null
+++ b/sql/item_row.h
@@ -0,0 +1,160 @@
+#ifndef ITEM_ROW_INCLUDED
+#define ITEM_ROW_INCLUDED
+
+/*
+   Copyright (c) 2002, 2013, Oracle and/or its affiliates.
+
+   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 02110-1335  USA */
+
+/**
+  Row items used for comparing rows and IN operations on rows:
+
+  @verbatim
+  (a, b, c) > (10, 10, 30)
+  (a, b, c) = (select c, d, e, from t1 where x=12)
+  (a, b, c) IN ((1,2,2), (3,4,5), (6,7,8)
+  (a, b, c) IN (select c, d, e, from t1)
+  @endverbatim
+*/
+
+
+/**
+   Item which stores (x,y,...) and ROW(x,y,...).
+   Note that this can be recursive: ((x,y),(z,t)) is a ROW of ROWs.
+*/
+class Item_row: public Item_fixed_hybrid,
+                private Item_args,
+                private Used_tables_and_const_cache,
+                private With_subquery_cache,
+                private With_sum_func_cache
+{
+  table_map not_null_tables_cache;
+  /**
+    If elements are made only of constants, of which one or more are
+    NULL. For example, this item is (1,2,NULL), or ( (1,NULL), (2,3) ).
+  */
+  bool with_null;
+public:
+  Item_row(THD *thd, List<Item> &list)
+   :Item_fixed_hybrid(thd), Item_args(thd, list),
+    not_null_tables_cache(0), with_null(0)
+  { }
+  Item_row(THD *thd, Item_row *row)
+   :Item_fixed_hybrid(thd), Item_args(thd, static_cast<Item_args*>(row)),
+    Used_tables_and_const_cache(),
+    With_sum_func_cache(*row),
+    not_null_tables_cache(0), with_null(0)
+  { }
+
+  bool with_subquery() const { DBUG_ASSERT(fixed); return m_with_subquery; }
+  enum Type type() const { return ROW_ITEM; };
+  const Type_handler *type_handler() const { return &type_handler_row; }
+  Field *create_tmp_field_ex(MEM_ROOT *root, TABLE *table, Tmp_field_src *src,
+                             const Tmp_field_param *param)
+  {
+    return NULL; // Check with Vicentiu why it's called for Item_row
+  }
+  void illegal_method_call(const char *);
+  bool is_null() { return null_value; }
+  void make_send_field(THD *thd, Send_field *)
+  {
+    illegal_method_call((const char*)"make_send_field");
+  };
+  double val_real()
+  {
+    illegal_method_call((const char*)"val");
+    return 0;
+  };
+  longlong val_int()
+  {
+    illegal_method_call((const char*)"val_int");
+    return 0;
+  };
+  String *val_str(String *)
+  {
+    illegal_method_call((const char*)"val_str");
+    return 0;
+  };
+  my_decimal *val_decimal(my_decimal *)
+  {
+    illegal_method_call((const char*)"val_decimal");
+    return 0;
+  };
+  bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate)
+  {
+    illegal_method_call((const char*)"get_date");
+    return true;
+  }
+  bool fix_fields(THD *thd, Item **ref);
+  void fix_after_pullout(st_select_lex *new_parent, Item **ref, bool merge);
+  void cleanup();
+  void split_sum_func(THD *thd, Ref_ptr_array ref_pointer_array,
+                      List<Item> &fields, uint flags);
+  bool with_sum_func() const { return m_with_sum_func; }
+  With_sum_func_cache* get_with_sum_func_cache() { return this; }
+  table_map used_tables() const { return used_tables_cache; };
+  bool const_item() const { return const_item_cache; };
+  void update_used_tables()
+  {
+    used_tables_and_const_cache_init();
+    used_tables_and_const_cache_update_and_join(arg_count, args);
+  }
+  table_map not_null_tables() const { return not_null_tables_cache; }
+  virtual void print(String *str, enum_query_type query_type);
+
+  bool walk(Item_processor processor, bool walk_subquery, void *arg)
+  {
+    if (walk_args(processor, walk_subquery, arg))
+      return true;
+    return (this->*processor)(arg);
+  }
+  Item *transform(THD *thd, Item_transformer transformer, uchar *arg);
+  bool eval_not_null_tables(void *opt_arg);
+  bool find_not_null_fields(table_map allowed);
+
+  uint cols() const { return arg_count; }
+  Item* element_index(uint i) { return args[i]; }
+  Item** addr(uint i) { return args + i; }
+  bool check_cols(uint c);
+  bool null_inside() { return with_null; };
+  void bring_value();
+
+  Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
+  {
+    Item_args::propagate_equal_fields(thd, Context_identity(), cond);
+    return this;
+  }
+
+  bool excl_dep_on_table(table_map tab_map)
+  {
+    return Item_args::excl_dep_on_table(tab_map);
+  }
+
+  bool excl_dep_on_grouping_fields(st_select_lex *sel)
+  {
+    return Item_args::excl_dep_on_grouping_fields(sel);
+  }
+
+  bool excl_dep_on_in_subq_left_part(Item_in_subselect *subq_pred)
+  {
+    return Item_args::excl_dep_on_in_subq_left_part(subq_pred);
+  }
+
+  bool check_vcol_func_processor(void *arg) {return FALSE; }
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_row>(thd, this); }
+  Item *build_clone(THD *thd);
+};
+
+#endif /* ITEM_ROW_INCLUDED */