Hive offered such function called explode(): explode() takes in an array as an input and outputs the elements of the array as separate rows. UDTF's can be used in the SELECT expression list and as a part of LATERAL VIEW.An example use of explode() in the SELECT expression list is as...
Explode Function in Hive Theexplodefunction in Hive is used to flatten arrays or nested structures in a table. It takes an array or map as input and returns a new row for each element in the array or each key-value pair in the map. This allows for easier processing and querying of com...
generator_function:生成器函数(EXPLODE、INLINE 等)。 table_identifier:generator_function 的别名,它是可选项。 column_identifier:列出列别名 generator_function,它可用于输出行。 列标识符的数目必须与 generator 函数返回的列数匹配。 示例: > CREATE TABLE person (id INT, name STRING, age INT, class INT,...
--建表加载数据 CREATE TABLE employee( id int, name string, deg string, salary int, dept string ) row format delimited fields terminated by ','; load data local inpath '/root/hivedata/employee.txt' into table employee; select * from employee; 0: jdbc:hive2://server4:10000> select * ...
Hive 炸裂函数 explode(map<string,string>) 宽表转高表SQL: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 select slice_id, user_id, shop_id, 'user_stats_public' as table_code, explode(kv) as (field_code,field_value) from ( select user_id, -1 as shop_id, abs(hash(user_id) %...
Hive中为了简化对于JSON文件的处理,内置了一种专门用于解析JSON文件的Serde解析器,在创建表时,只要指定使用JSONSerde解析表的文件,就会自动将JSON文件中的每一列进行解析。 使用 创建表 --切换数据库use db_function;--创建表create table tb_json_test2 ( device string, deviceType string, signal double, `...
How to use lateral view explode() function in Hive (HIve 中的explode()函数使用) 2013-09-09 01:59 − In Hive, we can create tables which has the MAP structure inside, like: 1 create table test ( 2 item MAP<STRING, STRING> 3 ); and sometimes ... linehrr-freedom 0 24443 SQ...
How to use lateral view explode() function in Hive (HIve 中的explode()函数使用) 2013-09-09 01:59 −In Hive, we can create tables which has the MAP structure inside, like: 1 create table test ( 2 item MAP<STRING, STRING> 3 ); and sometimes w... ...
这里有点奇怪,hive是schema on read,insert的时候会检查字段格式是否一致吗?? 比如parquet不支持date格式,insert进去也只是显示空字段,而不是一开始就insert报错 # 建表createtableifnotexiststest_youhua.test_array_struct_inline( custom_idintcomment "客户id", ...
Flink 1.10.0 HiveModule 使用 explode 函数出错怎么办？我们项目目前 集成了HiveModule，遇到一些问题。