improved sql parser.

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/transform/NameResolveVisitor.java

@@ -22,6 +22,7 @@ import com.alibaba.druid.sql.ast.SQLStatement;
 import com.alibaba.druid.sql.ast.expr.*;
 import com.alibaba.druid.sql.ast.statement.*;
 import com.alibaba.druid.sql.dialect.oracle.visitor.OracleASTVisitorAdapter;
+import com.alibaba.druid.util.FnvHash;
 
 /**
  * Created by wenshao on 26/07/2017.
@@ -46,6 +47,14 @@ public class NameResolveVisitor extends OracleASTVisitorAdapter {
             return false;
         }
 
+        long hash = x.nameHashCode64();
+        SQLTableSource tableSource = null;
+
+        if (hash == FnvHash.Constants.LEVEL
+                || hash == FnvHash.Constants.CONNECT_BY_ISCYCLE) {
+            return false;
+        }
+
         if (parent instanceof SQLPropertyExpr) {
             return false;
         }

src/main/java/com/alibaba/druid/sql/repository/SchemaResolveVisitorFactory.java

@@ -503,6 +503,10 @@ class SchemaResolveVisitorFactory {
         }
 
         public boolean visit(SQLIdentifierExpr x) {
+            if (x.nameHashCode64() == FnvHash.Constants.ROWNUM) {
+                return false;
+            }
+
             resolve(this, x);
             return true;
         }

src/main/resources/META-INF/druid/parser/postgresql/keywords

@@ -143,7 +143,6 @@ merge
 min
 mod
 modifies
-module
 multiset
 natural
 nclob