CreateQuery test_null_as_default (children 3)
 Identifier test_null_as_default
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType Int8
   ColumnDeclaration b (children 2)
    DataType Int64
    Function minus (children 1)
     ExpressionList (children 2)
      Identifier c
      Literal UInt64_500
   ColumnDeclaration c (children 2)
    DataType Int32
    Function plus (children 1)
     ExpressionList (children 2)
      Identifier a
      Literal UInt64_1000
 Storage definition (children 1)
  Function Memory
