loftiest commented on code in PR #56498:
URL: https://github.com/apache/spark/pull/56498#discussion_r3465994064
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sql/api/src/main/scala/org/apache/spark/sql/functions.scala:
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@@ -5174,6 +5174,62 @@ object functions {
*/
def instr(str: Column, substring: Column): Column = Column.fn("instr", str,
substring)
+ /**
+ * Locate the position of the first occurrence of `substring` in `str`,
starting the search from
Review Comment:
Thanks for the suggestion! I've added a `@note` to the Scala Scaladoc
covering that negative `start` searches backward and `start = 0` returns 0,
keeping the IDE-facing docs aligned with the SQL documentation.
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