Decide on modeling of different numeric semantics in test suite

[alancai98]

Across different SQL-compliant databases, there are different semantics related to some numeric operations, including:

• integer overflow/underflow
• rounding
• division by 0
• (some other cases)

The SQL-92 spec doesn't make the above cases clear. Some databases will error in the above cases, while others may return NULL or saturate to some default value. The PartiQL spec does not formalize this behavior as it may be operation and implementation-dependent. The conformance test suite should provide some way to configure the runtime numeric semantics for the above cases (e.g. through a test struct option or some namespace).

DoD

• Define all the numeric operation semantics that are definable in the test suite
• Create set of tests for each of the different numeric operation semantics