Sql

Description

Use SQL to process data and support engine's UDF function.

提示

This transform both supported by engine Spark and Flink.

Options

name	type	required	default value
sql	string	yes	-
common-options	string	no	-

sql [string]

SQL statement, the table name used in SQL configured in the Source or Transform plugin

common options [string]

Transform plugin common parameters, please refer to Transform Plugin for details

Examples

Simple Select

Use the SQL plugin for field deletion. Only the username and address fields are reserved, and the remaining fields will be discarded. user_info is the result_table_name configured by the previous plugin

sql {
    sql = "select username, address from user_info",
}

Use UDF

Use SQL plugin for data processing, use substring functions to intercept the telephone field

sql {
    sql = "select substring(telephone, 0, 10) from user_info",
}

Use UDAF

Use SQL plugin for data aggregation, use avg functions to perform aggregation operations on the original data set, and take out the average value of the age field

sql {
    sql = "select avg(age) from user_info",
    table_name = "user_info"
}