April 2016
Beginner
268 pages
5h 32m
English
Content preview from Apache Hive CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using complex data types
In addition to primitive data types, Hive also supports a few complex data types: Struct, MAP, and Array. Complex data types are also known as collection data types. Most relational databases don't support such data types.
Complex data types can be built from primitive data types:
STRUCT: The struct data type in Hive is analogous to theSTRUCTin C programming language. It is a record type that holds a set of named fields that can be of any primitive data types. Fields in theSTRUCTtype are accessed using the DOT (.) notation.Syntax:
STRUCT<col_name : data_type [COMMENT col_comment], ...>For example, if a column
addressis of the typeSTRUCT {city STRING; state STRING}, then the city field can be referenced usingaddress.city ...
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