[Feature][plugin-spark-source-jdbc] add jdbc connector settings in source config for easy used

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Description

When I config plugin-spark-source-jdbc for one jdbc source,I found i can’t set jdbc properties through its config file.I looked through the code and found that jdbc source’s config has no entrance to set properties for jdbc connector.The only way you can do this is through the URL like this eg: jdbc:mysql://localhost:3306/test?connectTimeout=10000&socketTimeout=10000 This url set connectTimeout and socketTimeout for the connector. Then, I looked through spark’s doc, I found this topic: https://spark.apache.org/docs/2.4.0/sql-data-sources-jdbc.html , in fact that spark supports accepting the parameters of connector. It looks like this: val connectionProperties = new Properties() connectionProperties.put("user", "username") connectionProperties.put("password", "password") val jdbcDF2 = spark.read .jdbc("jdbc:postgresql:dbserver", "schema.tablename", connectionProperties) // Specifying the custom data types of the read schema connectionProperties.put("customSchema", "id DECIMAL(38, 0), name STRING") val jdbcDF3 = spark.read .jdbc("jdbc:postgresql:dbserver", "schema.tablename", connectionProperties)

Usage Scenario

Add a prefix for connector configtions, jdbc input config like this: jdbc { driver = “com.mysql.jdbc.Driver” url = “jdbc:mysql://localhost:3306/info” table = “access” result_table_name = “access_log” user = “username” password = “password” jdbc.partitionColumn = “item_id” jdbc.numPartitions = “10” jdbc.lowerBound = 0 jdbc.upperBound = 100 conn.connectTimeout = 10000 conn.socketTimeout = 10000 }

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[leo65535]

I checked the jdbc configuration in spark project. These two connectTimeout and socketTimeout are belong to url configuration item, we can not set them in other places.

Add a prefix for connector configtions

SeaTunnel project already supports prefix, the prefix is jdbc

[CalvinKirs]

cloused