Add INSERT(..., DEFAULT, ).

Rod Taylor

src/backend/parser/analyze.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.226 2002/04/02 06:30:34 tgl Exp $
+ *	$Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.227 2002/04/05 11:56:51 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -518,13 +518,29 @@ transformInsertStmt(ParseState *pstate, InsertStmt *stmt,
 		TargetEntry *tle = (TargetEntry *) lfirst(tl);
 		ResTarget   *col;
 
-		Assert(!tle->resdom->resjunk);
 		if (icolumns == NIL || attnos == NIL)
 			elog(ERROR, "INSERT has more expressions than target columns");
 		col = (ResTarget *) lfirst(icolumns);
-		Assert(IsA(col, ResTarget));
-		updateTargetListEntry(pstate, tle, col->name, lfirsti(attnos),
+
+		/*
+		 * When the value is to be set to the column default we can simply
+		 * drop it now and handle it later on using methods for missing
+		 * columns.
+		 */
+		if (!IsA(tle, InsertDefault))
+		{
+			Assert(IsA(col, ResTarget));
+			Assert(!tle->resdom->resjunk);
+			updateTargetListEntry(pstate, tle, col->name, lfirsti(attnos),
 							  col->indirection);
+		}
+		else
+		{
+			icolumns = lremove(icolumns, icolumns);
+			attnos = lremove(attnos, attnos);
+			qry->targetList = lremove(tle, qry->targetList);
+		}
+
 		icolumns = lnext(icolumns);
 		attnos = lnext(attnos);
 	}

src/backend/parser/gram.y

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.299 2002/04/01 04:35:38 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.300 2002/04/05 11:56:53 momjian Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -203,6 +203,7 @@ static bool set_name_needs_quotes(const char *name);
 		from_clause, from_list, opt_array_bounds, qualified_name_list,
 		any_name, any_name_list, expr_list, dotted_name, attrs,
 		target_list, update_target_list, insert_column_list,
+		insert_target_list,
 		def_list, opt_indirection, group_clause, TriggerFuncArgs,
 		select_limit, opt_select_limit
 
@@ -263,7 +264,7 @@ static bool set_name_needs_quotes(const char *name);
 %type <node>	table_ref
 %type <jexpr>	joined_table
 %type <range>	relation_expr
-%type <target>	target_el, update_target_el
+%type <target>	target_el, insert_target_el, update_target_el
 
 %type <typnam>	Typename, SimpleTypename, ConstTypename
 				GenericType, Numeric, Character, ConstDatetime, ConstInterval, Bit
@@ -3504,7 +3505,7 @@ InsertStmt:  INSERT INTO qualified_name insert_rest
 				}
 		;
 
-insert_rest:  VALUES '(' target_list ')'
+insert_rest:  VALUES '(' insert_target_list ')'
 				{
 					$$ = makeNode(InsertStmt);
 					$$->cols = NIL;
@@ -3525,7 +3526,7 @@ insert_rest:  VALUES '(' target_list ')'
 					$$->targetList = NIL;
 					$$->selectStmt = $1;
 				}
-		| '(' insert_column_list ')' VALUES '(' target_list ')'
+		| '(' insert_column_list ')' VALUES '(' insert_target_list ')'
 				{
 					$$ = makeNode(InsertStmt);
 					$$->cols = $2;
@@ -5244,7 +5245,6 @@ c_expr:  columnref
 					s->val.type = T_String;
 					s->val.val.str = "now";
 					s->typename = makeTypeName(xlateSqlType("text"));
-
 					d = makeTypeName(xlateSqlType("timetz"));
 					if (($3 < 0) || ($3 > 13))
 						elog(ERROR,"CURRENT_TIME(%d) precision must be between %d and %d",
@@ -5721,6 +5721,23 @@ update_target_el:  ColId opt_indirection '=' a_expr
 				}
 		;
 
+insert_target_list:  insert_target_list ',' insert_target_el
+				{	$$ = lappend($1, $3);  }
+		| insert_target_el
+				{	$$ = makeList1($1);  }
+		;
+
+insert_target_el:  target_el	{	$$ = $1;  }
+				| DEFAULT		{	
+									InsertDefault *def = makeNode(InsertDefault);
+									$$ = makeNode(ResTarget);
+									$$->name = NULL;
+									$$->indirection = NULL;
+									$$->val = (Node *)def;
+								}
+				;
+
+
 /*****************************************************************************
  *
  *	Names and constants

src/backend/parser/parse_target.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.81 2002/04/02 08:51:52 inoue Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.82 2002/04/05 11:56:53 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -175,9 +175,19 @@ transformTargetList(ParseState *pstate, List *targetlist)
 														false));
 			}
 		}
+		else if (IsA(res->val, InsertDefault))
+		{
+			InsertDefault *newnode = makeNode(InsertDefault);
+
+			/*
+			 * If this is a DEFAULT element, we make a junk entry
+			 * which will get dropped on return to transformInsertStmt().
+			 */
+			p_target = lappend(p_target, newnode);
+		}
 		else
 		{
-			/* Everything else but ColumnRef */
+			/* Everything else but ColumnRef and InsertDefault */
 			p_target = lappend(p_target,
 							   transformTargetEntry(pstate,
 													res->val,