Avi Kivity 19a6e69001 cql3: accept and type-check reused named bind variables ...

A named bind-variable can be reused:

    SELECT * FROM tab
    WHERE a = :var AND b = :var

Currently, the grammar just ignores the possibility and creates
a new variable with the same name. The new variable cannot be
referenced by name since the first one shadows it.

Catch variable reuse by maintaining a map from bind variable names
to indexed, and check that when reusing a bind variable the types
match.

A unit test is added.

Fixes #10810

Closes #10813

2022-06-17 09:09:49 +02:00

3.3 KiB

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