Burak Yavuz created SPARK-31178:
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Summary: sql("INSERT INTO v2DataSource ...").collect() double
inserts
Key: SPARK-31178
URL: https://issues.apache.org/jira/browse/SPARK-31178
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.0.0
Reporter: Burak Yavuz
The following unit test fails in DataSourceV2SQLSuite:
{code:java}
test("do not double insert on INSERT INTO collect()") {
import testImplicits._
val t1 = s"${catalogAndNamespace}tbl"
sql(s"CREATE TABLE $t1 (id bigint, data string) USING $v2Format")
val tmpView = "test_data"
val df = Seq((1L, "a"), (2L, "b"), (3L, "c")).toDF("id", "data")
df.createOrReplaceTempView(tmpView)
sql(s"INSERT INTO TABLE $t1 SELECT * FROM $tmpView").collect()
verifyTable(t1, df)
} {code}
The INSERT INTO is double inserting when ".collect()" is called. I think this
is because the V2 SparkPlans are not commands, and doExecute on a Spark plan
can be called multiple times causing data to be inserted multiple times.
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