LanguageManual DDL - Apache Hive - Apache Software Foundation
OverviewHiveQL DDL statements are documented here, including: CREATE DATABASE/SCHEMA, TABLE, VIEW, FUNCTION, INDEXDROP DATABASE/SCHEMA, TABLE, VIEW, INDEXTRUNCATE TABLEALTER DATABASE/SCHEMA, TABLE, VIEWMSCK REPAIR TABLE (or ALTER TABLE RECOVER PARTITIONS)SHOW DATABASES/SCHEMAS, TABLES, TBLPROPERTIES, VIEWS, PARTITIONS, FUNCTIONS, INDEX[ES], COLUMNS, CREATE TABLEDESCRIBE DATABASE/SCHEMA, table_name
LanguageManual SortBy
Syntax of Order By The ORDER BY syntax in Hive QL is similar to the syntax of ORDER BY in SQL language. colOrder: ( ASC | DESC ) orderBy: ORDER BY colName colOrder? (',' colName colOrder?)* query: SELECT expression (',' expression)* FROM src orderBy There are some limitations in the "order by" clause. In the strict mode (i.e., hive.mapred.mode=strict), the order by clause has to be followed by a "
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 problem relates to the UDF's implementation of the getDisplayString method, as discussed in the Hive user mailing list.
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LanguageManual Transform
http://dev.bizo.com/2009/10/hive-map-reduce-in-java.html
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