Implement the DO statement to support execution of PL code without having

to create a function for it.

Procedural languages now have an additional entry point, namely a function
to execute an inline code block.  This seemed a better design than trying
to hide the transient-ness of the code from the PL.  As of this patch, only
plpgsql has an inline handler, but probably people will soon write handlers
for the other standard PLs.

In passing, remove the long-dead LANCOMPILER option of CREATE LANGUAGE.

Petr Jelinek

1 files changed, 13 insertions, 1 deletions

diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 6c75f2e2747..d7ed08cc68b 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -22,7 +22,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.360 2009/07/30 02:45:37 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.361 2009/09/22 23:43:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1213,6 +1213,14 @@ _equalRemoveFuncStmt(RemoveFuncStmt *a, RemoveFuncStmt *b)
 }
 
 static bool
+_equalDoStmt(DoStmt *a, DoStmt *b)
+{
+	COMPARE_NODE_FIELD(args);
+
+	return true;
+}
+
+static bool
 _equalRemoveOpClassStmt(RemoveOpClassStmt *a, RemoveOpClassStmt *b)
 {
 	COMPARE_NODE_FIELD(opclassname);
@@ -1667,6 +1675,7 @@ _equalCreatePLangStmt(CreatePLangStmt *a, CreatePLangStmt *b)
 {
 	COMPARE_STRING_FIELD(plname);
 	COMPARE_NODE_FIELD(plhandler);
+	COMPARE_NODE_FIELD(plinline);
 	COMPARE_NODE_FIELD(plvalidator);
 	COMPARE_SCALAR_FIELD(pltrusted);
 
@@ -2576,6 +2585,9 @@ equal(void *a, void *b)
 		case T_RemoveFuncStmt:
 			retval = _equalRemoveFuncStmt(a, b);
 			break;
+		case T_DoStmt:
+			retval = _equalDoStmt(a, b);
+			break;
 		case T_RemoveOpClassStmt:
 			retval = _equalRemoveOpClassStmt(a, b);
 			break;