cloud-fan commented on code in PR #48737:
URL: https://github.com/apache/spark/pull/48737#discussion_r1831270258
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common/unsafe/src/main/java/org/apache/spark/sql/catalyst/util/CollationFactory.java:
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@@ -231,9 +231,10 @@ public Collation(
* UTF8_BINARY collation ID binary layout:
* bit 31-24: Zeroes.
* bit 23-22: Zeroes, reserved for version.
- * bit 21-19 Zeros, reserved for future trimmings.
- * bit 18 0 = none, 1 = right trim.
- * bit 17-3: Zeroes.
+ * bit 21-19: Zeros, reserved for future trimmings.
+ * bit 18: 0 = none, 1 = right trim.
+ * bit 17: 0 = none, 1 = utf8_binary.
Review Comment:
I'm wondering if we will ever persist string types with default collation,
as Spark is supposed to determine the collation during analysis.
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