zhenlineo commented on code in PR #40160:
URL: https://github.com/apache/spark/pull/40160#discussion_r1119407376


##########
connector/connect/client/jvm/src/test/scala/org/apache/spark/sql/PlanGenerationTestSuite.scala:
##########
@@ -230,14 +230,6 @@ class PlanGenerationTestSuite
   private def temporals = createLocalRelation(temporalsSchemaString)
 
   /* Spark Session API */
-  test("sql") {

Review Comment:
   Pls also delete the corresponding auto generated files too. Each test should 
have 3 files related to it. `.json`, `.bin`, `.explain`



##########
connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/SparkSession.scala:
##########
@@ -122,8 +122,18 @@ class SparkSession(
   @Experimental
   def sql(sqlText: String, args: java.util.Map[String, String]): DataFrame = 
newDataFrame {
     builder =>
-      builder
-        .setSql(proto.SQL.newBuilder().setQuery(sqlText).putAllArgs(args))
+      // Send the SQL once to the server and then check the output.
+      val cmd = newCommand(b =>
+        
b.setSqlCommand(proto.SqlCommand.newBuilder().setSql(sqlText).putAllArgs(args)))
+      val plan = proto.Plan.newBuilder().setCommand(cmd)
+      val responseIter = client.execute(plan.build())
+
+      val response = responseIter.asScala
+        .find(_.hasSqlCommandResult)
+        .getOrElse(throw new RuntimeException("SQLCommandResult must be 
present"))

Review Comment:
   Maybe `require(sqlCommandResult)` or a `IllegalArgumentException`?



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