Yuming Wang created SPARK-25740:
-----------------------------------
Summary: Set some configuration need invalidateStatsCache
Key: SPARK-25740
URL: https://issues.apache.org/jira/browse/SPARK-25740
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.0.0
Reporter: Yuming Wang
How to reproduce:
{code:sql}
# spark-sql
create table t1 (a int) stored as parquet;
create table t2 (a int) stored as parquet;
insert into table t1 values (1);
insert into table t2 values (1);
explain select * from t1, t2 where t1.a = t2.a;
exit;
spark-sql
explain select * from t1, t2 where t1.a = t2.a;
-- SortMergeJoin
set spark.sql.statistics.fallBackToHdfs=true;
explain select * from t1, t2 where t1.a = t2.a;
-- SortMergeJoin, it should be BroadcastHashJoin
exit;
spark-sql
set spark.sql.statistics.fallBackToHdfs=true;
explain select * from t1, t2 where t1.a = t2.a;
-- BroadcastHashJoin
{code}
We need {{LogicalPlanStats.invalidateStatsCache}}, but seems only we can do is
invalidateAllCachedTables when execute set Command:
{code}
val isInvalidateAllCachedTablesKeys = Set(
SQLConf.ENABLE_FALL_BACK_TO_HDFS_FOR_STATS.key,
SQLConf.DEFAULT_SIZE_IN_BYTES.key
)
sparkSession.conf.set(key, value)
if (isInvalidateAllCachedTablesKeys.contains(key)) {
sparkSession.sessionState.catalog.invalidateAllCachedTables()
}
{code}
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