Proper aggregate function detection (even deeper in AST) #581
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janedbal
commented
Jun 25, 2024
| use Doctrine\ORM\Query\AST; | ||
| use function is_string; | ||
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| class QueryAggregateFunctionDetectorTreeWalker extends Query\TreeWalkerAdapter |
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The AST traversal logic is copied from Doctrine's SqlWalker. But since they do double-dispatch which is not possible here, those places are mostly replaced with generic doWalkNode.
I also prefixed all methods with do so that this works in dbal3 and dbal4 (where TreeWalker interface lost most of its methods).
janedbal
commented
Jun 25, 2024
| $this->constantArray([ | ||
| [ | ||
| new ConstantStringType('many'), | ||
| TypeCombinator::addNull(new ObjectType(Many::class)), |
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This wont be nullable in the old implementation, which is wrong.
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Thank you! |
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Separated from #506.
This is needed for proper nullability detection (when no group by is used, single row is always returned). Previously, it was working only when SUM was in first level in select AST. But it can be anywhere inside the tree, so we need pre-walk the AST to detect it.