Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/7925#discussion_r36275714
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/parquet/ParquetQuerySuite.scala ---
@@ -189,4 +189,17 @@ class ParquetQuerySuite extends QueryTest with
ParquetTest {
}
}
}
+
+ test("SPARK-9119 Decimal should be correctly written into parquet") {
+ withTempPath { dir =>
+ val basePath = dir.getCanonicalPath
+ val schema = StructType(Array(StructField("name", DecimalType(10,
5), false)))
+ val rowRDD =
sqlContext.sparkContext.parallelize(Array(Row(Decimal("67123.45"))))
+ val df = sqlContext.createDataFrame(rowRDD, schema)
+ df.write.parquet(basePath)
+
+ val decimal = sqlContext.read.parquet(basePath).first().getDecimal(0)
+ assert(Decimal("67123.45") === Decimal(decimal))
--- End diff --
When we compare Decimal, the zero on the most right does not matter. If we
compare them as java.math.BigDecimal, it matters.
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