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[SPARK-21335] support un-aliased subquery - Spark - [issue]
...un-aliased subquery is supported by Spark SQL for a long time. Its semantic was not well defined and has confusing behaviors, and it's not a standard SQL syntax, so we disallowed it in https...
http://issues.apache.org/jira/browse/SPARK-21335    Author: Wenchen Fan , 2018-06-27, 03:41
[SPARK-24267] explicitly keep DataSourceReader in DataSourceV2Relation - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-24267    Author: Wenchen Fan , 2018-06-15, 04:49
[SPARK-22387] propagate session configs to data source read/write options - Spark - [issue]
...This is an open discussion. The general idea is we should allow users to set some common configs in session conf so that they don't need to type them again and again for each data source ope...
http://issues.apache.org/jira/browse/SPARK-22387    Author: Wenchen Fan , 2018-09-06, 23:24
[SPARK-25445] publish a scala 2.12 build with Spark 2.4 - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-25445    Author: Wenchen Fan , 2018-09-18, 14:30
[SPARK-12321] JSON format for logical/physical execution plans - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-12321    Author: Wenchen Fan , 2018-09-06, 06:13
[SPARK-25317] MemoryBlock performance regression - Spark - [issue]
...eThere is a performance regression when calculating hash code for UTF8String:  test("hashing") {    import org.apache.spark.unsafe.hash.Murmur3_x86_32    import org....
http://issues.apache.org/jira/browse/SPARK-25317    Author: Wenchen Fan , 2018-09-07, 19:15
[SPARK-23880] table cache should be lazy and don't trigger any job - Spark - [issue]
...val df = spark.range(10000000000L)  .filter('id > 1000)  .orderBy('id.desc)  .cache()This triggers a job while the cache should be lazy. The problem is that, when creating ...
http://issues.apache.org/jira/browse/SPARK-23880    Author: Wenchen Fan , 2018-09-09, 04:03
[SPARK-21320] Make sure all expressions support interpreted evaluation - Spark - [issue]
...Most of time Spark SQL will evaluate expressions with codegen. However codegen is a complex technology, and we have already fixed a lot of bugs for it, and there will be more. To make Spark ...
http://issues.apache.org/jira/browse/SPARK-21320    Author: Wenchen Fan , 2018-09-10, 14:34
[SPARK-25192] Remove SupportsPushdownCatalystFilter - Spark - [issue]
...This interface was created for file source(not migrated yet) to implement hive partition pruning. It turns out that, we can also use the public Filter API in the hive partition pruning. Thus...
http://issues.apache.org/jira/browse/SPARK-25192    Author: Wenchen Fan , 2018-08-23, 03:21
[SPARK-25188] Add WriteConfig - Spark - [issue]
...The current write API is not flexible enough to implement more complex write operations like `replaceWhere`. We can follow the read API and add a `WriteConfig` to make it more flexible....
http://issues.apache.org/jira/browse/SPARK-25188    Author: Wenchen Fan , 2018-08-22, 21:27