Github user NathanHowell commented on a diff in the pull request:
https://github.com/apache/spark/pull/16386#discussion_r100098008
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
---
@@ -1764,4 +1769,125 @@ class JsonSuite extends QueryTest with
SharedSQLContext with TestJsonData {
val df2 = spark.read.option("PREfersdecimaL", "true").json(records)
assert(df2.schema == schema)
}
+
+ test("SPARK-18352: Parse normal multi-line JSON files (compressed)") {
+ withTempDir { dir =>
+ dir.delete()
+ val path = dir.getCanonicalPath
+ primitiveFieldAndType
+ .toDF("value")
+ .write
+ .option("compression", "GzIp")
+ .text(path)
+
+ new File(path).listFiles() match {
+ case compressedFiles =>
+ assert(compressedFiles.exists(_.getName.endsWith(".gz")))
+ }
+
+ val jsonDF = spark.read.option("wholeFile", true).json(path)
+ val jsonDir = new File(dir, "json").getCanonicalPath
+ jsonDF.coalesce(1).write
+ .format("json")
+ .option("compression", "gZiP")
+ .save(jsonDir)
+
+ new File(jsonDir).listFiles() match {
+ case compressedFiles =>
+ assert(compressedFiles.exists(_.getName.endsWith(".json.gz")))
+ }
+
+ val jsonCopy = spark.read
+ .format("json")
+ .load(jsonDir)
+
+ assert(jsonCopy.count === jsonDF.count)
+ val jsonCopySome = jsonCopy.selectExpr("string", "long", "boolean")
+ val jsonDFSome = jsonDF.selectExpr("string", "long", "boolean")
+ checkAnswer(jsonCopySome, jsonDFSome)
+ }
+ }
+
+ test("SPARK-18352: Parse normal multi-line JSON files (uncompressed)") {
+ withTempDir { dir =>
+ dir.delete()
+ val path = dir.getCanonicalPath
+ primitiveFieldAndType
+ .toDF("value")
+ .write
+ .text(path)
+
+ val jsonDF = spark.read.option("wholeFile", true).json(path)
+ val jsonDir = new File(dir, "json").getCanonicalPath
+ jsonDF.coalesce(1).write
+ .format("json")
+ .save(jsonDir)
+
+ val compressedFiles = new File(jsonDir).listFiles()
+ assert(compressedFiles.exists(_.getName.endsWith(".json")))
+
+ val jsonCopy = spark.read
+ .format("json")
+ .load(jsonDir)
+
+ assert(jsonCopy.count === jsonDF.count)
+ val jsonCopySome = jsonCopy.selectExpr("string", "long", "boolean")
+ val jsonDFSome = jsonDF.selectExpr("string", "long", "boolean")
+ checkAnswer(jsonCopySome, jsonDFSome)
+ }
+ }
+
+ test("SPARK-18352: Expect one JSON document per file") {
+ // the json parser terminates as soon as it sees a matching END_OBJECT
or END_ARRAY token.
+ // this might not be the optimal behavior but this test verifies that
only the first value
+ // is parsed and the rest are discarded.
+
+ // alternatively the parser could continue parsing following objects,
which may further reduce
+ // allocations by skipping the line reader entirely
+
+ withTempDir { dir =>
+ dir.delete()
+ val path = dir.getCanonicalPath
+ primitiveFieldAndType
+ .flatMap(Iterator.fill(3)(_) ++ Iterator("\n{invalid}"))
--- End diff --
sure
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