HyukjinKwon commented on code in PR #49609:
URL: https://github.com/apache/spark/pull/49609#discussion_r1926265908
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sql/api/src/main/scala/org/apache/spark/sql/functions.scala:
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@@ -7132,7 +7132,24 @@ object functions {
Column.fn("variant_get", v, lit(path), lit(targetType))
/**
- * Extracts a sub-variant from `v` according to `path`, and then cast the
sub-variant to
+ * Extracts a sub-variant from `v` according to `path` column, and then cast
the sub-variant to
+ * `targetType`. Returns null if the path does not exist. Throws an
exception if the cast fails.
+ *
+ * @param v
+ * a variant column.
+ * @param path
+ * the column containing the extraction path strings. A valid path string
should start with `$`
+ * and is followed by zero or more segments like `[123]`, `.name`,
`['name']`, or `["name"]`.
+ * @param targetType
+ * the target data type to cast into, in a DDL-formatted string.
+ * @group variant_funcs
+ * @since 4.1.0
Review Comment:
let's target 4.0.0
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