Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17064#discussion_r103530085
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala ---
@@ -634,4 +634,28 @@ class CachedTableSuite extends QueryTest with
SQLTestUtils with SharedSQLContext
assert(getNumInMemoryRelations(cachedPlan2) == 4)
}
}
+
+ test("refreshByPath should refresh all cached plans with the specified
path") {
+ def f(path: String, spark: SparkSession, dataCount: Int): DataFrame = {
+ spark.catalog.refreshByPath(path)
+ val data = spark.read.parquet(path)
+ assert(data.count == dataCount)
+ val df = data.filter("id > 10")
+ df.cache
+ assert(df.count == dataCount - 11)
+ val df1 = df.filter("id > 11")
+ df1.cache
+ assert(df1.count == dataCount - 12)
+ df1
+ }
+
+ withTempDir { dir =>
+ val path = dir.getPath()
+ spark.range(100).write.mode("overwrite").parquet(path)
+ assert(f(path, spark, 100).count == 88)
+
+ spark.range(1000).write.mode("overwrite").parquet(path)
+ assert(f(path, spark, 1000).count == 988)
--- End diff --
we can make this test more explicit
```
spark.range(10).write.mode("overwrite").parquet(path)
spark.read.parquet(path).cache()
spark.read.parquet(path).filter($"id" > 4).cache()
assert(spark.read.parquet(path).filter($"id" > 4).count() == 5)
spark.range(20).write.mode("overwrite").parquet(path)
spark.catalog.refreshByPath(path)
assert(spark.read.parquet(path).filter($"id" > 4).count() == 15)
```
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