yew1eb opened a new pull request, #1681:
URL: https://github.com/apache/auron/pull/1681
# Which issue does this PR close?
Closes #1680 .
# Rationale for this change
The current initcap implementation uses DataFusion's initcap, which does
not match Spark's semantics. Spark uses space-only word boundaries and
title-cases the first letter while lowercasing the rest.
# What changes are included in this PR?
+ Implement a new initcap native function aligned with Spark, similar to
Spark's implementation logic: `
string.asInstanceOf[UTF8String].toLowerCase.toTitleCase`.
# Are there any user-facing changes?
Yes. initcap results will now match Spark's semantics.
# How was this patch tested?
Added unit tests covering ASCII/non-ASCII, punctuation, space-only
boundaries, and edge cases.
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