CreateQuery test_lc (children 3)
 Identifier test_lc
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration b (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration c (children 1)
    DataType Float64
 Storage definition (children 1)
  Function Join (children 1)
   ExpressionList (children 4)
    Identifier any
    Identifier left
    Identifier a
    Identifier b
