//tag::ref-doc[] = JDBC Source This source polls data from an RDBMS. This source is fully based on the `DataSourceAutoConfiguration`, so refer to the https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-sql.html[Spring Boot JDBC Support] for more information. === Payload * `Map<String, Object>` when `jdbc.split == true` (default) and `List<Map<String, Object>>` otherwise == Options The **$$jdbc$$** $$source$$ has the following options: //tag::configuration-properties[] Properties grouped by prefix: === jdbc.supplier $$max-rows$$:: $$Max numbers of rows to process for query.$$ *($$Integer$$, default: `$$0$$`)* $$query$$:: $$The query to use to select data.$$ *($$String$$, default: `$$<none>$$`)* $$split$$:: $$Whether to split the SQL result as individual messages.$$ *($$Boolean$$, default: `$$true$$`)* $$update$$:: $$An SQL update statement to execute for marking polled messages as 'seen'.$$ *($$String$$, default: `$$<none>$$`)* === spring.datasource $$data$$:: $$Data (DML) script resource references.$$ *($$List<String>$$, default: `$$<none>$$`)* $$driver-class-name$$:: $$Fully qualified name of the JDBC driver. Auto-detected based on the URL by default.$$ *($$String$$, default: `$$<none>$$`)* $$initialization-mode$$:: $$Mode to apply when determining if DataSource initialization should be performed using the available DDL and DML scripts.$$ *($$DataSourceInitializationMode$$, default: `$$embedded$$`, possible values: `ALWAYS`,`EMBEDDED`,`NEVER`)* $$password$$:: $$Login password of the database.$$ *($$String$$, default: `$$<none>$$`)* $$schema$$:: $$Schema (DDL) script resource references.$$ *($$List<String>$$, default: `$$<none>$$`)* $$url$$:: $$JDBC URL of the database.$$ *($$String$$, default: `$$<none>$$`)* $$username$$:: $$Login username of the database.$$ *($$String$$, default: `$$<none>$$`)* //end::configuration-properties[] Also see the https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html[Spring Boot Documentation] for addition `DataSource` properties and `TriggerProperties` and `MaxMessagesProperties` for polling options. //end::ref-doc[]