Print

Displays attributes and tuples of a relation.

Usage

print (data : )

Details

The attributes and tuple values of data are a printed to stdout, in the order that they arrive as soon as they arrive.

Notes

None.

Known Bugs

Relation names are not displayed. Thus, it can be difficult to use more than one print operator in a plan because the outputs are not distinguishable.

Example

Using the input:

      RELATION books: title char, author char, pub_date date, pages number
      Title1|Author1|09-01-1991|34
      Title2|Author2|12-23-1954|479
      Title3|Author2|05-09-2002|733
      Title4|Author3|01-01-1968|32
      Title5|Author2|07-03-2001|1152

when executing the plan:

      PLAN test
      {
       INPUT: stream books
       OUTPUT: 
      
       BODY
       {
         print (books : )
       }
      }

will generate the following output:

      ATTRS=[title, author, pub_date, pages]
       DATA=[Title5|Author2|07-03-2001|1152,Title4|Author3|01-01-1968|32,Title2|Author2|12-23-1954|479,Title1|Author1|09-01-1991|34,Title3|Author2|05-09-2002|733,EOS]