Applied a patch by Zoltán Böszörményi that makes ecpg's parser accept dynamic...

Applied a patch by Zoltán Böszörményi that makes ecpg's parser accept dynamic cursornames even in WHERE CURRENT OF clauses.

src/backend/parser/gram.y

@@ -9031,7 +9031,7 @@ where_clause:
 /* variant for UPDATE and DELETE */
 where_or_current_clause:
 			WHERE a_expr							{ $$ = $2; }
-			| WHERE CURRENT_P OF name
+			| WHERE CURRENT_P OF cursor_name
 				{
 					CurrentOfExpr *n = makeNode(CurrentOfExpr);
 					/* cvarno is filled in by parse analysis */

src/interfaces/ecpg/preproc/ecpg.addons

@@ -192,6 +192,11 @@ ECPG: stmtViewStmt rule
 
 		output_simple_statement($1);
 	}
+ECPG: where_or_current_clauseWHERECURRENT_POFcursor_name block
+	{
+		char *cursor_marker = $4[0] == ':' ? mm_strdup("$0") : $4;
+		$$ = cat_str(2,mm_strdup("where current of"), cursor_marker);
+	}
 ECPG: CopyStmtCOPYopt_binaryqualified_nameopt_column_listopt_oidscopy_fromcopy_file_namecopy_delimiteropt_withcopy_options addon
 			if (strcmp($6, "to") == 0 && strcmp($7, "stdin") == 0)
 				mmerror(PARSE_ERROR, ET_ERROR, "COPY TO STDIN is not possible");