improved sql parser. for issue #1637

2023-03-04 19:17:16 +00:00 · 2017-03-14 20:34:25 +08:00
parent aa8459e192
commit aa8cfcf4f8
8 changed files with 281 additions and 39 deletions
@@ -1220,6 +1220,19 @@ public class SQLExprParser extends SQLParser {
            item.setType(SQLOrderingSpecification.DESC);
        }

+        if (identifierEquals("NULLS")) {
+            lexer.nextToken();
+            if (identifierEquals("FIRST")) {
+                lexer.nextToken();
+                item.setNullsOrderType(SQLSelectOrderByItem.NullsOrderType.NullsFirst);
+            } else if (identifierEquals("LAST")) {
+                lexer.nextToken();
+                item.setNullsOrderType(SQLSelectOrderByItem.NullsOrderType.NullsLast);
+            } else {
+                throw new ParserException("TODO " + lexer.token());
+            }
+        }
+
        return item;
    }