PLUGIN-1823: Add default value for external documentation

Author: sgarg-CS

database-commons/src/main/java/io/cdap/plugin/db/action/AbstractDBArgumentSetter.java

@@ -114,10 +114,10 @@ private void processArguments(Class<? extends Driver> driverClass,
   private void executeWithRetry(FailureCollector failureCollector, SettableArguments settableArguments,
                                 Properties connectionProperties) throws SQLException {
     try (Connection connection = RetryUtils.createConnectionWithRetry((RetryPolicy<Connection>) retryPolicy,
-        config.getConnectionString(), connectionProperties, null)) {
+        config.getConnectionString(), connectionProperties, getExternalDocumentationLink())) {
       ResultSet resultSet;
       try (Statement statement = RetryUtils.createStatementWithRetry((RetryPolicy<Statement>) retryPolicy, connection,
-        null)) {
+        getExternalDocumentationLink())) {
         resultSet = RetryUtils.executeQueryWithRetry((RetryPolicy<ResultSet>) retryPolicy, statement,
           config.getQuery(), null);
       }
@@ -153,4 +153,14 @@ private void setArguments(ResultSet resultSet, FailureCollector failureCollector
       arguments.set(column, resultSet.getString(column));
     }
   }
+
+  /**
+   * Returns the external documentation link.
+   * Override this method to provide a custom external documentation link.
+   *
+   * @return external documentation link
+   */
+  protected String getExternalDocumentationLink() {
+    return "https://en.wikipedia.org/wiki/SQLSTATE";
+  }
 }

database-commons/src/main/java/io/cdap/plugin/db/sink/AbstractDBSink.java

@@ -187,7 +187,7 @@ protected String getErrorDetailsProviderClassName() {
    * @return external documentation link
    */
   protected String getExternalDocumentationLink() {
-    return null;
+    return "https://en.wikipedia.org/wiki/SQLSTATE";
   }
 
   @Override

database-commons/src/main/java/io/cdap/plugin/db/source/AbstractDBSource.java

@@ -368,7 +368,7 @@ protected Class<? extends DBWritable> getDBRecordType() {
    * @return external documentation link
    */
   protected String getExternalDocumentationLink() {
-    return null;
+    return "https://en.wikipedia.org/wiki/SQLSTATE";
   }
 
   @Override