INSERT ... VALUES(DEFAULT)

Docs/manual.texi

@@ -34456,13 +34456,13 @@ provide an interactive user interfaces to the database.
 @example
     INSERT [LOW_PRIORITY | DELAYED] [IGNORE]
         [INTO] tbl_name [(col_name,...)]
-        VALUES (expression,...),(...),...
+        VALUES ((expression | DEFAULT),...),(...),...
 or  INSERT [LOW_PRIORITY | DELAYED] [IGNORE]
         [INTO] tbl_name [(col_name,...)]
         SELECT ...
 or  INSERT [LOW_PRIORITY | DELAYED] [IGNORE]
         [INTO] tbl_name
-        SET col_name=expression, col_name=expression, ...
+        SET col_name=(expression | DEFAULT), ...
 
 @end example
 
@@ -34492,6 +34492,11 @@ example, if you specify a column list that doesn't name all the columns in
 the table, unnamed columns are set to their default values.  Default value
 assignment is described in @ref{CREATE TABLE, , @code{CREATE TABLE}}.
 
+You can also use the keyword @code{DEFAULT} to set a column to it's
+defaults value. (New in MySQL 4.0.3).  This makes it easier to write
+insert statements as you don't have to use a field-name list just because
+you don't want to set a value for a few columns.
+
 MySQL always has a default value for all fields. This is something
 that is imposed on MySQL to be able to work with both transactional
 and not transactional tables.
@@ -50010,6 +50015,9 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
 @node News-4.0.3, News-4.0.2, News-4.0.x, News-4.0.x
 @appendixsubsec Changes in release 4.0.3
 @itemize @bullet
+@item
+Allow @code{DEFAULT} with @code{INSERT} statement.
+@item
 The startup parameters @code{myisam_max_extra_sort_file_size} and
 @code{myisam_max_extra_sort_file_size} are now given in bytes, not megabytes.
 @item

mysql-test/r/insert.result

@@ -19,3 +19,29 @@ insert into t1 values (0,"mysql a");
 insert into t1 values (0,"r1manic");
 insert into t1 values (0,"r1man");
 drop table t1;
+create table t1 (a int not null auto_increment, primary key (a), t timestamp, c char(10) default "hello");
+insert into t1 values (default,default,default), (default,default,default), (4,0,"a"),(default,default,default);
+select a,t>0,c from t1;
+a	t>0	c
+1	1	hello
+2	1	hello
+4	0	a
+5	1	hello
+truncate table t1;
+insert into t1 set a=default,t=default,c=default;
+insert into t1 set a=default,t=default,c=default;
+insert into t1 set a=4,t=0,c="a";
+insert into t1 set a=default,t=default,c=default;
+select a,t>0,c from t1;
+a	t>0	c
+1	1	hello
+2	1	hello
+4	0	a
+5	1	hello
+drop table t1;
+drop database if exists foo;
+create database foo;
+use foo;
+create table t1 (c int);
+insert into foo.t1 set foo.t1.c = '1';
+drop database foo;

mysql-test/r/insert_set.result

-drop database if exists foo;
-create database foo;
-use foo;
-create table b (c int);
-insert into foo.b set foo.b.c = '1';
-drop database foo;

mysql-test/t/insert.test

@@ -22,3 +22,29 @@ insert into t1 values (0,"mysql a");
 insert into t1 values (0,"r1manic");
 insert into t1 values (0,"r1man");
 drop table t1;
+
+#
+# Test insert syntax
+#
+
+create table t1 (a int not null auto_increment, primary key (a), t timestamp, c char(10) default "hello");
+insert into t1 values (default,default,default), (default,default,default), (4,0,"a"),(default,default,default);
+select a,t>0,c from t1;
+truncate table t1;
+insert into t1 set a=default,t=default,c=default;
+insert into t1 set a=default,t=default,c=default;
+insert into t1 set a=4,t=0,c="a";
+insert into t1 set a=default,t=default,c=default;
+select a,t>0,c from t1;
+drop table t1;
+
+#
+# Test of mysqld crash with fully qualified column names
+#
+
+drop database if exists foo;
+create database foo;
+use foo;
+create table t1 (c int);
+insert into foo.t1 set foo.t1.c = '1';
+drop database foo;

mysql-test/t/insert_set.test

-#
-# Test of mysqld crash with fully qualified column names
-#
-
-drop database if exists foo;
-create database foo;
-use foo;
-create table b (c int);
-insert into foo.b set foo.b.c = '1';
-drop database foo;

sql/field.h

@@ -70,6 +70,10 @@ public:
   virtual uint32 pack_length() const { return (uint32) field_length; }
   virtual void reset(void) { bzero(ptr,pack_length()); }
   virtual void reset_fields() {}
+  virtual void set_default()
+  {
+    memcpy(ptr, ptr + table->rec_buff_length, pack_length());
+  }
   virtual bool binary() const { return 1; }
   virtual bool zero_pack() const { return 1; }
   virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
@@ -550,6 +554,10 @@ public:
   bool store_for_compare() { return 1; }
   bool zero_pack() const { return 0; }
   void set_time();
+  virtual void set_default()
+  {
+    set_time();
+  }
   inline long get_timestamp()
   {
 #ifdef WORDS_BIGENDIAN

sql/item.cc

@@ -383,12 +383,14 @@ void Item_datetime::make_field(Send_field *tmp_field)
   init_make_field(tmp_field,FIELD_TYPE_DATETIME);
 }
 
+
 void Item_null::make_field(Send_field *tmp_field)
 {
   init_make_field(tmp_field,FIELD_TYPE_NULL);
   tmp_field->length=4;
 }
 
+
 void Item_func::make_field(Send_field *tmp_field)
 {
   init_make_field(tmp_field, ((result_type() == STRING_RESULT) ?

sql/item.h

@@ -31,7 +31,7 @@ public:
 
   enum Type {FIELD_ITEM,FUNC_ITEM,SUM_FUNC_ITEM,STRING_ITEM,
 	     INT_ITEM,REAL_ITEM,NULL_ITEM,VARBIN_ITEM,
-	     COPY_STR_ITEM,FIELD_AVG_ITEM,
+	     COPY_STR_ITEM,FIELD_AVG_ITEM, DEFAULT_ITEM,
 	     PROC_ITEM,COND_ITEM,REF_ITEM,FIELD_STD_ITEM, CONST_ITEM};
   enum cond_result { COND_UNDEF,COND_OK,COND_TRUE,COND_FALSE };
 
@@ -285,6 +285,28 @@ public:
   unsigned int size_of() { return sizeof(*this);}  
 };
 
+
+/* For INSERT ... VALUES (DEFAULT) */
+
+class Item_default :public Item
+{
+public:
+  Item_default() { name= (char*) "DEFAULT"; }
+  enum Type type() const { return DEFAULT_ITEM; }
+  void make_field(Send_field *field) {}
+  bool save_in_field(Field *field)
+  {
+    field->set_default();
+    return 0;
+  }
+  virtual double val() { return 0.0; }
+  virtual longlong val_int() { return 0; }
+  virtual String *val_str(String *str) { return 0; }
+  bool basic_const_item() const { return 1; }
+  unsigned int size_of() { return sizeof(*this);}
+};
+
+
 /* for show tables */
 
 class Item_datetime :public Item_string

sql/sql_insert.cc

@@ -60,7 +60,7 @@ check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
     if (grant_option &&
 	check_grant_all_columns(thd,INSERT_ACL,table))
       return -1;
-    table->time_stamp=0;			// This should be saved
+    table->time_stamp=0;			// This is saved by caller
   }
   else
   {						// Part field list
@@ -178,7 +178,7 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list, List<Item> &fields,
   }
   its.rewind ();
   /*
-  ** Fill in the given fields and dump it to the table file
+    Fill in the given fields and dump it to the table file
   */
 
   info.records=info.deleted=info.copied=0;
@@ -204,7 +204,7 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list, List<Item> &fields,
 			   thd->variables.bulk_insert_buff_size);
   }
 
-  while ((values = its++))
+  while ((values= its++))
   {
     if (fields.elements || !value_count)
     {
@@ -367,7 +367,7 @@ static int last_uniq_key(TABLE *table,uint keynr)
 
 
 /*
-** Write a record to table with optional deleting of conflicting records
+  Write a record to table with optional deleting of conflicting records
 */
 
 
@@ -461,9 +461,9 @@ err:
 
 
 /******************************************************************************
-	Check that all fields with arn't null_fields are used
-	if DONT_USE_DEFAULT_FIELDS isn't defined use default value for not
-	set fields.
+  Check that all fields with arn't null_fields are used
+  If DONT_USE_DEFAULT_FIELDS isn't defined use default value for not set
+  fields.
 ******************************************************************************/
 
 static int check_null_fields(THD *thd __attribute__((unused)),
@@ -486,10 +486,8 @@ static int check_null_fields(THD *thd __attribute__((unused)),
 }
 
 /*****************************************************************************
-** Handling of delayed inserts
-**
-** A thread is created for each table that one uses with the DELAYED
-** attribute.
+  Handling of delayed inserts
+  A thread is created for each table that one uses with the DELAYED attribute.
 *****************************************************************************/
 
 class delayed_row :public ilink {
@@ -1272,7 +1270,7 @@ bool delayed_insert::handle_inserts(void)
 
 
 /***************************************************************************
-** store records in INSERT ... SELECT *
+  Store records in INSERT ... SELECT *
 ***************************************************************************/
 
 int
@@ -1389,7 +1387,7 @@ bool select_insert::send_eof()
 
 
 /***************************************************************************
-** CREATE TABLE (SELECT) ...
+  CREATE TABLE (SELECT) ...
 ***************************************************************************/
 
 int
@@ -1487,7 +1485,7 @@ void select_create::abort()
 
 
 /*****************************************************************************
-** Instansiate templates
+  Instansiate templates
 *****************************************************************************/
 
 #ifdef __GNUC__

sql/sql_yacc.yy

@@ -519,7 +519,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	literal text_literal insert_ident order_ident
 	simple_ident select_item2 expr opt_expr opt_else sum_expr in_sum_expr
 	table_wild opt_pad no_in_expr expr_expr simple_expr no_and_expr
-	using_list expr_or_default
+	using_list expr_or_default set_expr_or_default
 
 %type <item_list>
 	expr_list udf_expr_list when_list ident_list ident_list_arg
@@ -2486,7 +2486,7 @@ ident_eq_list:
 	ident_eq_value;
 
 ident_eq_value:
-	simple_ident equal expr
+	simple_ident equal expr_or_default
 	 {
 	  LEX *lex=Lex;
 	  if (lex->field_list.push_back($1) ||
@@ -2521,16 +2521,22 @@ opt_values:
 	| values;
 
 values:
-	values ','  expr
+	values ','  expr_or_default
 	{
 	  if (Lex->insert_list->push_back($3))
 	    YYABORT;
 	}
-	| expr
-	{
-	  if (Lex->insert_list->push_back($1))
-	    YYABORT;
-	};
+	| expr_or_default
+	  {
+	    if (Lex->insert_list->push_back($1))
+	      YYABORT;
+	  }
+	;
+
+expr_or_default:
+	expr 	  { $$= $1;}
+	| DEFAULT {$$= new Item_default(); }
+	;
 
 /* Update rows in a table */
 
@@ -3257,12 +3263,12 @@ option_value:
 	{
 	  Lex->var_list.push_back(new set_var_user(new Item_func_set_user_var($2,$4)));
 	}
-	| internal_variable_name equal expr_or_default
+	| internal_variable_name equal set_expr_or_default
 	  {
 	    LEX *lex=Lex;
 	    lex->var_list.push_back(new set_var(lex->option_type, $1, $3));
 	  }
-	| '@' '@' opt_var_ident_type internal_variable_name equal expr_or_default
+	| '@' '@' opt_var_ident_type internal_variable_name equal set_expr_or_default
 	  {
 	    LEX *lex=Lex;
 	    lex->var_list.push_back(new set_var((enum_var_type) $3, $4, $6));
@@ -3274,7 +3280,7 @@ option_value:
 						find_sys_var("transaction_isolation_num"),
 						new Item_int((int) $4)));
 	  }
-	| CHAR_SYM SET opt_equal expr_or_default
+	| CHAR_SYM SET opt_equal set_expr_or_default
 	{
 	  LEX *lex=Lex;
 	  lex->var_list.push_back(new set_var(lex->option_type,
@@ -3327,7 +3333,7 @@ text_or_password:
 	  };
 
 
-expr_or_default:
+set_expr_or_default:
 	expr      { $$=$1; }
 	| DEFAULT { $$=0; }
 	| ON	  { $$=new Item_string("ON",2); }