InsertQuery   (children 2)
 Identifier test_insert_t3
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 4)
     Literal \'2019-09-01\'
     Identifier uid
     Identifier name
     Identifier city
    TablesInSelectQuery (children 2)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (alias t1) (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 3)
           ExpressionList (children 4)
            Identifier dt
            Identifier uid
            Identifier name
            Identifier city
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier test_insert_t1
           Function equals (children 1)
            ExpressionList (children 2)
             Identifier dt
             Literal \'2019-09-01\'
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       Subquery (alias t2) (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 3)
           ExpressionList (children 1)
            Identifier uid
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier test_insert_t2
           Function equals (children 1)
            ExpressionList (children 2)
             Identifier dt
             Literal \'2019-09-01\'
      TableJoin (children 1)
       Function equals (children 1)
        ExpressionList (children 2)
         Identifier t1.uid
         Identifier t2.uid