Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/17043#discussion_r103044371
--- Diff:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaWriter.scala
---
@@ -0,0 +1,106 @@
+/*
+ * 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.kafka010
+
+import java.{util => ju}
+
+import org.apache.spark.TaskContext
+import org.apache.spark.internal.Logging
+import org.apache.spark.sql.{AnalysisException, SparkSession}
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.execution.{QueryExecution, SQLExecution}
+import org.apache.spark.sql.types.{BinaryType, StringType}
+import org.apache.spark.util.Utils
+
+private[kafka010] object KafkaWriter extends Logging {
+ val TOPIC_ATTRIBUTE_NAME: String = "topic"
+ val KEY_ATTRIBUTE_NAME: String = "key"
+ val VALUE_ATTRIBUTE_NAME: String = "value"
+
+ def write(
--- End diff --
i think you missed one of prior comments because of changes. Put all the
validation code in a separate function, that can be called separately. Then all
the validation can be prior to creating the sink, which would throw
analysisexception before actually starting the query. Right now, the query will
throw analysis error after the query has started and attempting to write to
Kafka, and thats weird.
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