parse_url_tuple

Hive 中的复合数据结构简介以及一些函数的用法说明

↘锁芯ラ 提交于 2019-12-03 04:02:50
目前 hive 支持的复合数据类型有以下几种: map (key1, value1, key2, value2, ...) Creates a map with the given key/value pairs struct (val1, val2, val3, ...) Creates a struct with the given field values. Struct field names will be col1, col2, ... named_struct (name1, val1, name2, val2, ...) Creates a struct with the given field names and values. (as of Hive 0.8.0) array (val1, val2, ...) Creates an array with the given elements create_union (tag, val1, val2, ...) Creates a union type with the value that is being pointed to by the tag parameter 一、map、struct、array 这3种的用法: 1、Array的使用 创建数据库表,以array作为数据类型 create table