panbingkun commented on code in PR #48087:
URL: https://github.com/apache/spark/pull/48087#discussion_r1759675601


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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala:
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@@ -618,3 +619,44 @@ case class SQLKeywords() extends LeafExpression with 
Generator with CodegenFallb
 
   override def prettyName: String = "sql_keywords"
 }
+
+@ExpressionDescription(
+  usage = """_FUNC_() - Get all of the Spark SQL string collations""",
+  examples = """
+    Examples:
+      > SELECT * FROM _FUNC_() WHERE COLLATION_NAME = 'UTF8_BINARY';
+       SYSTEM  BUILTIN  UTF8_BINARY NULL  NULL  ACCENT_SENSITIVE  
CASE_SENSITIVE  NO_PAD  NULL
+  """,
+  since = "4.0.0",
+  group = "generator_funcs")
+case class AllCollations() extends LeafExpression with Generator with 
CodegenFallback {
+  override def elementSchema: StructType = new StructType()
+    .add("COLLATION_CATALOG", StringType, nullable = false)
+    .add("COLLATION_SCHEMA", StringType, nullable = false)
+    .add("COLLATION_NAME", StringType, nullable = false)

Review Comment:
   Thank you, I see.



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