Forbid duplicated variables in VALUES #294
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Co-authored-by: Olaf Hartig <olaf.hartig@liu.se>
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<p>A <code>VALUES</code> block of data can appear in a query pattern or at the end of a
<code>SELECT</code> query, including a <a href="#subqueries">subquery</a>.</p>It has occurred to me to wonder whether there may be more than one I think the text should be adjusted to make plain whichever of the above is correct. |
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The variables must only be unique within each VALUES block. On the level of the algebraic syntax, each VALUES clause becomes a multiset of solution mappings that is joined with the result of other patterns. Hence, if there are two VALUES clauses their respective multiset of solution mappings are joined with one another. |
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Close #293
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