<br><b>Code</b>: rsb:print<br><b>Error</b>: Formatter [ rootadoname | tolower() ] failed in the evaluation of <p> ???????[company_name] JDBC driver for [service] ?RapidMiner ???????????????????????????[service] ?[company_name] JDBC ???????????[datasource] ?RapidMiner ???????????? </p> <h2>JDBC ?????????RapidMiner ?[service] ???</h2> <p>You can follow the procedure below to establish a JDBC connection to [service]:</p> <ol> <li>Add a new database driver for [service]:Click Connections -> Manage Database Drivers. <li>In the resulting wizard, click the Add button and enter a name for the connection. <li>Enter the prefix for the JDBC URL: <code> jdbc:[rootadoname|tolower]: </code> <li>Enter the path to the [company_name|tolower].jdbc.[rootadoname|tolower].jar file, located in the lib subfolder of the installation directory. <li>Enter the driver class: <code> [company_name|tolower].jdbc.[rootadoname|tolower].[rootadoname]Driver </code> <img src="[x|UrlRootAbs]/kb/articles/jdbc-rapidminer-1.png" title="The JDBC driver configuration. (Salesforce is shown.)"/> <li>Create a new [service] connection:Click Connections -> Manage Database Connections. <li>Enter a name for your connection. <li>For Database System, select the [service] driver you configured previously. <li>Enter your connection string in the Host box. [extraconnectionnotesjdbc|def('[extraconnectionnotes|def("")]')] <h4>???????????????</h4> <p>For assistance in constructing the JDBC URL, use the connection string designer built into the [service] JDBC Driver.Either double-click the JAR file or execute the jar file from the command-line.</p> <code> java -jar cdata.jdbc.[rootadoname|tolower].jar </code> <p> Fill in the connection properties and copy the connection string to the clipboard. </p> <img src="[x|UrlRootAbs]/kb/articles/jdbc-url-builder-0.png" title="Using the built-in connection string designer to generate a JDBC URL (Salesforce is shown.)"/> <p> A typical connection string is below:</p> <code> [extraconnectionprops|def('')]. The error was: The attribute does not exist. This formatter cannot be called with nonexistent attributes.<br><b>URL</b>: /jp/kb/tech/sqlite-jdbc-rapidminer.rst