标签：spark-sql

2012-02-29admin阅读(2372)赞(0)

Configuration Properties Configuration properties (aka settings) allow you to fine-tune a Spark SQL application. ...

2012-02-28admin阅读(1577)赞(0)

Aggregator — Contract for User-Defined Typed Aggregate Functions (UDAFs)

2012-02-27admin阅读(1464)赞(0)

UserDefinedAggregateFunction — Contract for User-Defined Untyped Aggregate Functions (UDAFs)

2012-02-26admin阅读(928)赞(0)

Dataset Checkpointing Dataset Checkpointing is a feature of Spark SQL to truncate a logical query plan that could ...

2012-02-25admin阅读(1131)赞(0)

User-Friendly Names Of Cached Queries in web UI’s Storage Tab

2012-02-24admin阅读(1992)赞(0)

Dataset Caching and Persistence Table 1. Caching Operators (Basic Actions) Operator Description cache ...

2012-02-23admin阅读(1244)赞(0)

Multi-Dimensional Aggregation Multi-dimensional aggregate operators are enhanced variants of groupBy operator that ...

2012-02-22admin阅读(2675)赞(0)

Data Types DataType abstract class is the base type of all built-in data types in Spark SQL, e.g. strings, longs. ...

2012-02-21admin阅读(2268)赞(0)

StructField — Single Field in StructType

2012-02-20admin阅读(2384)赞(0)

StructType — Data Type for Schema Definition