ECPG's parser now accepts and handles variables as arguments for the FREE command.

Informix allows variables as argument to the embedded SQL command FREE. Given
that we only allow freeing cursors via FREE for compatibility reasons only we
should do the same.

src/interfaces/ecpg/preproc/ecpg.addons

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.addons,v 1.16 2010/01/29 16:28:13 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.addons,v 1.17 2010/03/21 11:56:45 meskes Exp $ */
 ECPG: stmtClosePortalStmt block
 	{
 		if (INFORMIX_MODE)
@@ -106,10 +106,13 @@ ECPG: stmtViewStmt rule
 	| ECPGFree
 	{
 		const char *con = connection ? connection : "NULL";
-		if (strcmp($1, "all"))
-			fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, \"%s\");", compat, con, $1);
-		else
+
+		if (!strcmp($1, "all"))
 			fprintf(yyout, "{ ECPGdeallocate_all(__LINE__, %d, %s);", compat, con);
+		else if ($1[0] == ':') 
+			fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, %s);", compat, con, $1+1);
+		else
+			fprintf(yyout, "{ ECPGdeallocate(__LINE__, %d, %s, \"%s\");", compat, con, $1);
 
 		whenever_action(2);
 		free($1);

src/interfaces/ecpg/preproc/ecpg.trailer

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.trailer,v 1.22 2010/03/20 18:53:00 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.trailer,v 1.23 2010/03/21 11:56:45 meskes Exp $ */
 
 statements: /*EMPTY*/
                 | statements statement
@@ -966,7 +966,7 @@ execstring: char_variable
  * the exec sql free command to deallocate a previously
  * prepared statement
  */
-ECPGFree:	SQL_FREE name	{ $$ = $2; }
+ECPGFree:	SQL_FREE cursor_name	{ $$ = $2; }
 		| SQL_FREE ALL	{ $$ = make_str("all"); }
 		;