SavicStefan commented on code in PR #53830:
URL: https://github.com/apache/spark/pull/53830#discussion_r2703912077
##########
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/v2/jdbc/JDBCTableCatalogSuite.scala:
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@@ -789,4 +792,23 @@ class JDBCTableCatalogSuite extends QueryTest with
SharedSparkSession {
assert(plan.isInstanceOf[InMemoryTableScanExec])
}
}
+
+ test("loadTable execute single query") {
Review Comment:
With this test I am measuring executeQuery() calls, which is a JDBC API
call. This ensures we only execute one query when loading a table schema.
And we don't have metrics for the number of JDBC connection creation.
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