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.
LanguageManual VariableSubstitution - Apache Hive - Apache Software Foundation
IntroductionHive is used for batch and interactive queries. Variable Substitution allows for tasks such as separating environment-specific configuration variables from code. The Hive variable substitution mechanism was designed to avoid some of the code that was getting baked into the scripting language on top of Hive. Examples such as the following shell commands may (inefficiently) be used to se
LanguageManual - Apache Hive - Apache Software Foundation
This is the Hive Language Manual. For other Hive documentation, see the Hive wiki's Home page. Commands and CLIs CommandsHive CLI (old)Beeline CLI (new)Variable SubstitutionHCatalog CLIFile FormatsAvro FilesORC FilesParquetCompressed Data StorageLZO CompressionData TypesData Definition StatementsDDL StatementsBucketed TablesStatistics (Analyze and Describe)IndexesArchivingData Manipulation Statem
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