0
$\begingroup$

We say that a query in a TRC is a statement of the form $\{T: P(T)\}$, where $T$ is a tuple variable and $P(T)$ is a formula.

Now my question is, what are the possible tuples $T$ to be tested i.e., what are the types and values for tested tuples.

As far as I know in set theory and in particular in set builder notation the variables should come from another well-defined set.

Improve this question
$\endgroup$
1
  • $\begingroup$ There are many TRCs. You need to define what type "tuple" is in yours. That will give you your "well-defined set". $\endgroup$
    – philipxy
    Commented Oct 11, 2020 at 23:50

1 Answer 1

Reset to default
1
$\begingroup$

From Wikipedia:

A tuple is of the form $T=(D,R,h)$ where $D$ is the domain, $R$ is a set of relation names, and $h$ is a mapping that associates a column name to each relation in $R$. To represent a tuple, we can see $D$ as the set of keys, and $R$ the table associated with those set of keys, and $h$ the column names of the table.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.