feat: simplify regex wildcard pattern #15299
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Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
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jayzhan211
reviewed
Mar 19, 2025
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| if let Expr::Literal(ScalarValue::Utf8(Some(pattern))) = right.as_ref() { | ||
| // Handle the special case for ".*" pattern | ||
| if pattern == ".*" { |
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We can make this a const similar to COUNT_STAR_EXPANSION
Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
alamb
reviewed
Mar 19, 2025
| right: empty_lit, | ||
| }) | ||
| } else { | ||
| // always true |
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I think this needs to handle nulls too as null ~ '.*' is not true (it is null)
> create or replace table foo(x varchar) as values (1), (2), (null);
0 row(s) fetched.
Elapsed 0.004 seconds.
> select x ~ '.*' from foo;
+--------------------+
| foo.x ~ Utf8(".*") |
+--------------------+
| true |
| true |
| NULL |
+--------------------+
3 row(s) fetched.
Elapsed 0.016 seconds.So maybe instead of lit(true) it is x.is_not_null() 🤔
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Good catch! I added two cases about null in simplify_expr.slt, it should work as expected now.
Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
jayzhan211
reviewed
Mar 20, 2025
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| query I | ||
| SELECT * FROM v1; |
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If this result is not deterministic, we need rowsort for it
Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
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Thank you for reviewing @jayzhan211 @alamb ❤️ |
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Which issue does this PR close?
Rationale for this change
Simplify dump regex cases like
~ '.*'or!~ '.*'.What changes are included in this PR?
Handle special wildcard regex pattern in expr_simplifier rule
Are these changes tested?
Yes, via sqllogictests and unit tests
Are there any user-facing changes?
no