Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4446#discussion_r24390084
--- Diff: python/pyspark/sql_tests.py ---
@@ -285,6 +285,38 @@ def test_aggregator(self):
self.assertTrue(95 <
g.agg(Dsl.approxCountDistinct(df.key)).first()[0])
self.assertEqual(100,
g.agg(Dsl.countDistinct(df.value)).first()[0])
+ def test_save_and_load(self):
+ df = self.df
+ tmpPath = tempfile.mkdtemp()
+ shutil.rmtree(tmpPath)
+ df.save(tmpPath, "org.apache.spark.sql.json", "error")
+ actual = self.sqlCtx.load(tmpPath, "org.apache.spark.sql.json")
+ self.assertTrue(sorted(df.collect()) == sorted(actual.collect()))
+
+ from pyspark.sql import StructType, StructField, StringType
+ schema = StructType([StructField("value", StringType(), True)])
+ actual = self.sqlCtx.load(tmpPath, "org.apache.spark.sql.json",
schema)
+ self.assertTrue(sorted(df.select("value").collect()) ==
sorted(actual.collect()))
+
+ df.save(tmpPath, "org.apache.spark.sql.json", "overwrite")
+ actual = self.sqlCtx.load(tmpPath, "org.apache.spark.sql.json")
+ self.assertTrue(sorted(df.collect()) == sorted(actual.collect()))
+
+ df.save(dataSourceName="org.apache.spark.sql.json",
mode="overwrite", path=tmpPath,
+ noUse="this options will not be used in save.")
+ actual =
self.sqlCtx.load(dataSourceName="org.apache.spark.sql.json", path=tmpPath,
+ noUse="this options will not be used in
load.")
+ self.assertTrue(sorted(df.collect()) == sorted(actual.collect()))
+
+ defaultDataSourceName =
self.sqlCtx._ssql_ctx.getConf("spark.sql.sources.default",
+
"org.apache.spark.sql.parquet")
+ self.sqlCtx.sql("SET
spark.sql.sources.default=org.apache.spark.sql.json")
--- End diff --
that's in a separate pr https://github.com/apache/spark/pull/4489
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