CreateQuery test_table_nullable (children 3)
 Identifier test_table_nullable
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType UInt8
   ColumnDeclaration b (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType UInt8
 Storage definition (children 1)
  Function TinyLog
