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feat: support Spark format_string expression#3588

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n0r0shi wants to merge 1 commit intoapache:mainfrom
n0r0shi:format-string-func
Open

feat: support Spark format_string expression#3588
n0r0shi wants to merge 1 commit intoapache:mainfrom
n0r0shi:format-string-func

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@n0r0shi n0r0shi commented Feb 25, 2026

Summary

  • Wire format_string from the datafusion-spark crate (FormatStringFunc) to Comet
  • Register in jni_api.rs and add serde mapping via CometScalarFunction in QueryPlanSerde.scala

Test plan

  • New test in CometStringExpressionSuite — passes
  • Spotless formatting check passes
  • Rust native build passes

Register datafusion-spark's FormatStringFunc UDF and add serde
mapping in stringExpressions.
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