cloud-fan commented on code in PR #49103:
URL: https://github.com/apache/spark/pull/49103#discussion_r1908192395


##########
sql/core/src/test/scala/org/apache/spark/sql/collation/IndeterminateCollationTestSuite.scala:
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@@ -0,0 +1,222 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.collation
+
+import org.apache.spark.{SparkRuntimeException, SparkThrowable}
+import org.apache.spark.sql.{AnalysisException, DataFrame, QueryTest, Row}
+import org.apache.spark.sql.test.SharedSparkSession
+import org.apache.spark.sql.types.StringType
+
+class IndeterminateCollationTestSuite extends QueryTest with 
SharedSparkSession {
+
+  val testTableName = "tst_table"
+  val dataSource = "parquet"
+
+  def withTestTable(testCode: => Unit): Unit = {
+    withTable(testTableName) {
+      sql(s"""
+           |CREATE TABLE $testTableName (
+           |  c1 STRING COLLATE UTF8_LCASE,
+           |  c2 STRING COLLATE UTF8_BINARY
+           |) USING $dataSource
+           |""".stripMargin)
+      testCode
+    }
+  }
+
+  def assertIndeterminateCollationInExpressionError(query: => DataFrame): Unit 
= {
+    val exception = intercept[AnalysisException] {
+      query
+    }
+    assert(exception.getCondition === "INDETERMINATE_COLLATION_IN_EXPRESSION")
+  }
+
+  def assertRuntimeIndeterminateCollationError(query: => DataFrame): Unit = {
+    val exception = intercept[SparkRuntimeException] {
+      query.collect()
+    }
+    assert(exception.getCondition === "INDETERMINATE_COLLATION")
+  }
+
+  def assertIndeterminateCollationInSchemaError(columnPaths: String*)(
+      query: => DataFrame): Unit = {
+    checkError(
+      exception = intercept[AnalysisException] {
+        query.collect()
+      },
+      condition = "INDETERMINATE_COLLATION_IN_SCHEMA",
+      parameters = Map("columnPaths" -> columnPaths.mkString(", ")))
+  }
+
+  test("cannot use indeterminate collation name") {
+    checkError(
+      intercept[SparkThrowable] {
+        sql("SELECT 'a' COLLATE NULL")
+      },
+      "COLLATION_INVALID_NAME",
+      parameters = Map("proposals" -> "nl", "collationName" -> "NULL"))
+
+    checkError(
+      intercept[SparkThrowable] {
+        sql("SELECT CAST('a' AS STRING COLLATE NULL)")
+      },
+      "COLLATION_INVALID_NAME",
+      parameters = Map("proposals" -> "nl", "collationName" -> "NULL"))
+
+    intercept[SparkThrowable] {

Review Comment:
   nit: can we use `checkError` as well?



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