CreateQuery proportions_ztest (children 3)
 Identifier proportions_ztest
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration sx (children 1)
    DataType UInt64
   ColumnDeclaration sy (children 1)
    DataType UInt64
   ColumnDeclaration tx (children 1)
    DataType UInt64
   ColumnDeclaration ty (children 1)
    DataType UInt64
 Storage definition (children 1)
  Function Memory (children 1)
   ExpressionList