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Implement native support StringView for CONTAINS function #12168

Merged
merged 8 commits into from
Sep 10, 2024
Merged

Implement native support StringView for CONTAINS function #12168

merged 8 commits into from
Sep 10, 2024

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tlm365
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@tlm365 tlm365 commented Aug 26, 2024

Which issue does this PR close?

Closes #11838.

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What changes are included in this PR?

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Are there any user-facing changes?

@github-actions github-actions bot added documentation Improvements or additions to documentation sqllogictest SQL Logic Tests (.slt) functions labels Aug 26, 2024
@tlm365 tlm365 marked this pull request as draft August 26, 2024 10:13
@tlm365 tlm365 marked this pull request as ready for review August 26, 2024 18:32
@tlm365 tlm365 mentioned this pull request Aug 27, 2024
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@Omega359
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Omega359 commented Sep 2, 2024

I am wondering since the contains udf relies on regex (which isn't documented at all btw) whether it should be a wrapper for regexp_like and moved to the regex module? The order of the arguments is reversed and there is no flags for contains but functionally I think the two are equivalent.

@Omega359 Omega359 mentioned this pull request Sep 2, 2024
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tlm365 commented Sep 4, 2024

I am wondering since the contains udf relies on regex (which isn't documented at all btw) whether it should be a wrapper for regexp_like and moved to the regex module? The order of the arguments is reversed and there is no flags for contains but functionally I think the two are equivalent.

yeah, I also mentioned the similar of contains and regex_like that you mentioned above in #12180. But somehow I chose to implement it in string module. Let me try to implement it in regex module as your point - I also think it makes more sense.

@tlm365 tlm365 marked this pull request as draft September 6, 2024 02:39
@tlm365 tlm365 force-pushed the contains-string-view branch 4 times, most recently from ce80864 to 22f383b Compare September 6, 2024 09:59
@tlm365 tlm365 marked this pull request as ready for review September 6, 2024 10:42
alamb
alamb reviewed Sep 6, 2024
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Thank you @tlm365 -- sorry for the delay in reviewing. Overall this PR looks very cleanly implemented and is easy to read 👌

I had a few questions, but it looks pretty close to me

Thanks again

datafusion/functions/src/regex/regexp_common.rs Outdated
/// See the documentation [here](https://docs.rs/regex/1.5.4/regex/#grouping-and-flags)
/// for more information.
///
/// It is inspired / copied from `regexp_is_match_utf8` [arrow-rs].
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I wonder why we need to haev our own copy here? Is it because the arrow kernel doesn't support StringView yet?

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Is it because the arrow kernel doesn't support StringView yet?

Yes, you're right. I intend to update this one in upstream [arrow-rs]. After that, we can eliminate it from this location.

datafusion/functions/Cargo.toml Outdated
@@ -52,9 +52,9 @@ encoding_expressions = ["base64", "hex"]
# enable math functions
math_expressions = []
# enable regular expressions
regex_expressions = ["regex"]
regex_expressions = ["regex", "string_expressions"]
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I don't understand the need for this change (which seems to basically make regex_expressions and string_expressions the same feature flag)

I see you added datafusion/functions/src/regex/regexp_common.rs, but that seems only to be used by string functions. Perhaps it would be beter placed somewhere in functions/src/ 🤔

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@alamb thanks for reviewing 🙏

Perhaps it would be beter placed somewhere in functions/src/

oh, I agree, will update it soon

@tlm365 tlm365 force-pushed the contains-string-view branch 2 times, most recently from f1bff73 to 6267b8d Compare September 7, 2024 00:41
@alamb alamb mentioned this pull request Sep 9, 2024
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Thank you @tlm365 -- looks great to me

@alamb alamb merged commit c71a9d7 into apache:main Sep 10, 2024
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alamb commented Sep 10, 2024

Thanks again @tlm365

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Update CONTAINS scalar function to support Utf8View
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