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[SPARK-21404] Simple Vectorized Python UDFs using Arrow -
Spark - [issue]
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| ...Using Arrow, Python UDFs can be evaluated in vectorized form by using the column data as Pandas.Series. This will offer a performance gain by computing the return column data in one op... |
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[SPARK-22105] Dataframe has poor performance when computing on many columns with codegen -
Spark - [issue]
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| ...Suppose we have a dataframe with many columns (e.g 100 columns), each column is DoubleType.And we need to compute avg on each column. We will find using dataframe avg will be much slower tha... |
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[SPARK-21870] Split codegen'd aggregation code into small functions for the HotSpot -
Spark - [issue]
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| ...In SPARK-21603, we got performance regression if the HotSpot didn't compile too long functions (the limit is 80000 in bytecode size).I checked and I found the codegen of `HashAggregateExec` ... |
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[SPARK-22103] Move HashAggregateExec parent consume to a separate function in codegen -
Spark - [issue]
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| ...HashAggregateExec codegen uses two paths for fast hash table and a generic one.It generates code paths for iterating over both, and both code paths generate the consume code of the parent op... |
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[SPARK-16625] Oracle JDBC table creation fails with ORA-00902: invalid datatype -
Spark - [issue]
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| ...Unfortunately I know very little about databases, but I figure this is a bug.I have a DataFrame with the following schema: StructType(StructField(dst,StringType,true), StructField(id,LongTyp... |
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[SPARK-10884] Support prediction on single instance for regression and classification related models -
Spark - [issue]
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| ...Support prediction on single instance for regression and classification related models (i.e., PredictionModel, ClassificationModel and their sub classes). Add corresponding test cases.See pa... |
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[SPARK-10413] ML models should support prediction on single instances -
Spark - [issue]
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| ...Currently models in the pipeline API only implement transform(DataFrame). It would be quite useful to support prediction on single instance.UPDATE: This issue is for making predictions with ... |
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[SPARK-22089] There is no need for fileStatusCache to invalidateAll when InMemoryFileIndex refresh -
Spark - [issue]
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| ...the fileStatusCache is globally shared cache，refresh is only for one table，so we do not need to invalidateAll entry in fileStatusCache /** Globally shared (not exclusive to this table)... |
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[SPARK-21428] CliSessionState never be recognized because of IsolatedClientLoader -
Spark - [issue]
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| ...When using bin/spark-sql with the builtin hive jars, we are expecting to reuse the instance of CliSessionState. // In `SparkSQLCLIDriver`, we have alr... |
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[SPARK-22102] Reusing CliSessionState didn't set correct METASTOREWAREHOUSE -
Spark - [issue]
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| ...It shows the warehouse dir is file:/root/create/spark/spark-2.3.0-SNAPSHOT-bin-2.6.5/spark-warehouse, but actually the warehouse dir is /user/hive/warehouse when create table.[root@wangyumin... |
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