[B! hive] kaolynのブックマーク

Cloudera Blog

Enterprises see embracing AI as a strategic imperative that will enable them to stay relevant in increasingly competitive markets. However, it rem ains difficult to quickly build these capabilities given the challenges with finding readily available talent and resources to get started rapidly on the AI journey. Cloudera recently signed a strategic collaboration agreement with Amazon […] Read blog p

kaolyn 2015/04/04

hadoop
hive

リンク

LanguageManual UDF - Apache Hive - Apache Software Foundation

When hive.cache.expr.evaluation is set to true (which is the default) a UDF can give incorrect results if it is nested in another UDF or a Hive function. This bug affects releases 0.12.0, 0.13.0, and 0.13.1. Release 0.14.0 fixed the bug (HIVE-7314). The probl em relates to the UDF's implementation of the getDisplayString method, as discussed in the Hive user mailing list.

kaolyn 2014/11/12

hive
hadoop

リンク

LanguageManual LateralView - Apache Hive - Apache Software Foundation

lateralView: LATERAL VIEW udtf(expression) tableAlias AS columnAlias (',' columnAlias)* fromClause: FROM baseTable (lateralView)* DescriptionLateral view is used in conjunction with user-defined table generating functions such as explode(). As mentioned in Built-in Table-Generating Functions, a UDTF generates zero or more output rows for each input row. A lateral view first applies the UDTF to eac