cloud-fan commented on code in PR #52127:
URL: https://github.com/apache/spark/pull/52127#discussion_r2308057174


##########
connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/SharedJDBCIntegrationTests.scala:
##########
@@ -17,18 +17,49 @@
 
 package org.apache.spark.sql.jdbc
 
+import java.sql.Connection
+
 import org.apache.spark.SparkException
-import org.apache.spark.sql.QueryTest
+import org.apache.spark.sql.{QueryTest, Row}
 
 trait SharedJDBCIntegrationTests extends QueryTest {
   protected def jdbcUrl: String
 
+  /**
+   * Create a table with the same name that can be used to test common 
functionality
+   * in
+   * @param conn
+   */
+  def createSharedTable(conn: Connection): Unit = {

Review Comment:
   `beforeAll` should be chained: if a suite override `beforeAll`, it should 
also call `super.override`. I think it's better than the current solution which 
we need to go to `def dataPreparation` in all dialects' test suites and invoke 
this new `def createSharedTable`.



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