SELECT constructor with 2 attributes cannot be coerced to a scalar.

[xd1313113]

Description

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To Reproduce

Steps to reproduce the behavior:

partiql ▶ (false, 1) = (SELECT a, b FROM T);
e: [semantic] Degree of scalar subquery must be 1 (one). Actual degree: 2.

Failed with given input. Please see the above errors.

Expected Behavior

• < A clear and concise description of what you expected to happen. >

Additional Context

• Java version: XXX
• PartiQL version: XXX
• Add any other context about the problem here.