datafusion-spark: regexp_extract() #17037
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andygrove
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Aug 7, 2025
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| /// REGEXP_EXTRACT function extracts the first string in the str that match | ||
| /// the regexp expression and corresponding to the regex group index. | ||
| /// <https://spark.apache.org/docs/latest/api/sql/#regexp_extract> |
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It may be worth adding documentation to explain that there are differences between Java's regex engine and Rust's regex engine, so users should not expect 100% compatibility
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Note that there was a previous PR for regexp_extract (#14282) - I don't know how it compares to this PR but just wanted to make it known. |
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Rationale for this change
People ask for regexp_extract in datafusion.
What changes are included in this PR?
This PR is fairly isolated and brings https://spark.apache.org/docs/latest/api/sql/#regexp_extract
from spark to datafusion-spark.
Are these changes tested?
Yes
Are there any user-facing changes?
Yes, spark's regexp_extract() is now implemented.