Select Clause

The Select clause can now specify the following results to be returned:

1. Single return values (discussed in Basic SPA requirements).
2. Multiple return values
3. BOOLEAN value

For multiple return values, the query reports any results for which there exists a combination of synonym instances satisfying all the conditions specified in such-that, pattern and with clauses.

For BOOLEAN, the query reports TRUE if:

• There are no constraints in the query, or
• There exists a combination of synonym instances satisfying all the conditions specified in the query;

FALSE otherwise.

Queries should adhere to format of results introduced in Basic SPA requirements and Advanced SPA requirements.