uros-db commented on code in PR #46041:
URL: https://github.com/apache/spark/pull/46041#discussion_r1567208898


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sql/core/src/test/scala/org/apache/spark/sql/CollationStringExpressionsSuite.scala:
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@@ -212,6 +212,48 @@ class CollationStringExpressionsSuite
     })
   }
 
+  test("Support StringRPad string expressions with collation") {
+    // Supported collations
+    case class StringRPadTestCase[R](s: String, len: Int, pad: String, c: 
String, result: R)
+    val testCases = Seq(
+      StringRPadTestCase("", 5, " ", "UTF8_BINARY", "     "),
+      StringRPadTestCase("abc", 5, " ", "UNICODE", "abc  "),
+      StringRPadTestCase("Hello", 7, "Wörld", "UTF8_BINARY_LCASE", "HelloWö"), 
// scalastyle:ignore
+      StringRPadTestCase("1234567890", 5, "aaaAAa", "UNICODE_CI", "12345"),
+      StringRPadTestCase("aaAA", 2, " ", "UTF8_BINARY", "aa"),
+      StringRPadTestCase("ÀÃÂĀĂȦÄäåäáâãȻȻȻȻȻǢǼÆ℀℃", 2, "1", "UNICODE", "ÀÃ"), 
// scalastyle:ignore
+      StringRPadTestCase("ĂȦÄäåäá", 20, "ÀÃÂĀĂȦÄäåäáâãȻȻȻȻȻǢǼÆ", 
"UTF8_BINARY_LCASE", "ĂȦÄäåäáÀÃÂĀĂȦÄäåäáâã"), // scalastyle:ignore
+      StringRPadTestCase("aȦÄä", 8, "a1", "UNICODE_CI", "aȦÄäa1a1") // 
scalastyle:ignore
+    )
+    testCases.foreach(t => {
+      val query = s"SELECT rpad(collate('${t.s}', '${t.c}'), ${t.len}, 
'${t.pad}')"
+      // Result & data type
+      checkAnswer(sql(query), Row(t.result))
+      assert(sql(query).schema.fields.head.dataType.sameType(StringType(t.c)))
+      })
+  }

Review Comment:
   ditto (see below)



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