Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14235#discussion_r71111037
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/catalyst/LogicalPlanToSQLSuite.scala
---
@@ -17,15 +17,32 @@
package org.apache.spark.sql.catalyst
+import java.nio.charset.StandardCharsets
+import java.nio.file.{Files, NoSuchFileException, Paths}
+
import scala.util.control.NonFatal
import org.apache.spark.sql.Column
+import org.apache.spark.sql.catalyst.parser.ParseException
import org.apache.spark.sql.functions._
import org.apache.spark.sql.test.SQLTestUtils
+/**
+ * A test suite for LogicalPlan-to-SQL conversion.
+ *
+ * Each query has a golden generated SQL file in test/resources/sqlgen.
The test suite also has
+ * built-in functionality to automatically generate these golden files.
+ *
+ * To re-generate golden files, run:
+ * SPARK_GENERATE_GOLDEN_FILES=1 build/sbt "hive/test-only
*LogicalPlanToSQLSuite"
+ */
class LogicalPlanToSQLSuite extends SQLBuilderTest with SQLTestUtils {
import testImplicits._
+ // Used for generating new query answer files by saving
+ private val saveQuery = System.getenv("SPARK_GENERATE_GOLDEN_FILES") !=
null
--- End diff --
hm if it is 0 we probably shouldn't be running it, so i'd test the value
against 1
```
Option(System.getenv("SPARK_GENERATE_GOLDEN_FILES")) == Some("1")
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