This patch adds reporting of tcl global variable errorInfo

which contains stack trace.
  One problem, after this patch errors will generate multiline ERROR
messages. Is it acceptable or do I need split it and generate multiple
singleline messages?

Vsevolod Lobko

src/pl/tcl/pltcl.c

@@ -31,7 +31,7 @@
  *	  ENHANCEMENTS, OR MODIFICATIONS.
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/pl/tcl/pltcl.c,v 1.40 2001/10/01 15:33:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/pl/tcl/pltcl.c,v 1.41 2001/10/04 15:47:41 momjian Exp $
  *
  **********************************************************************/
 
@@ -789,7 +789,11 @@ pltcl_func_handler(PG_FUNCTION_ARGS)
 			pltcl_restart_in_progress = 1;
 			if (--pltcl_call_level == 0)
 				pltcl_restart_in_progress = 0;
-			elog(ERROR, "pltcl: %s", interp->result);
+			UTF_BEGIN;
+			elog(ERROR, "pltcl: %s\n%s", interp->result,
+				UTF_U2E(Tcl_GetVar(interp,"errorInfo",
+					TCL_GLOBAL_ONLY)));
+			UTF_END;
 		}
 		if (--pltcl_call_level == 0)
 			pltcl_restart_in_progress = 0;
@@ -1162,7 +1166,11 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS)
 			pltcl_restart_in_progress = 1;
 			if (--pltcl_call_level == 0)
 				pltcl_restart_in_progress = 0;
-			elog(ERROR, "pltcl: %s", interp->result);
+			UTF_BEGIN;
+			elog(ERROR, "pltcl: %s\n%s", interp->result,
+				UTF_U2E(Tcl_GetVar(interp,"errorInfo",
+					TCL_GLOBAL_ONLY)));
+			UTF_END;
 		}
 		if (--pltcl_call_level == 0)
 			pltcl_restart_in_progress = 0;