DATAJDBC-498 Add afterFromTable method to SelectRenderContext for Postgres lock hint

Author: mhyeon-lee

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/render/SelectRenderContext.java

@@ -25,6 +25,7 @@
  * element without further whitespace processing. Hooks are responsible for adding required surrounding whitespaces.
  *
  * @author Mark Paluch
+ * @author Myeonghyeon Lee
  * @since 1.1
  */
 public interface SelectRenderContext {
@@ -39,6 +40,16 @@ public interface SelectRenderContext {
 		return select -> "";
 	}
 
+	/**
+	 * Customization hook: Rendition of a part after {@code FROM} table.
+	 * Renders an empty string by default.
+	 *
+	 * @return render {@link Function} invoked after rendering {@code FROM} table.
+	 */
+	default Function<Select, ? extends CharSequence> afterFromTable() {
+		return select -> "";
+	}
+
 	/**
 	 * Customization hook: Rendition of a part after {@code ORDER BY}. The rendering function is called always, regardless
 	 * whether {@code ORDER BY} exists or not. Renders an empty string by default.

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/render/SelectStatementVisitor.java

@@ -28,6 +28,7 @@
  *
  * @author Mark Paluch
  * @author Jens Schauder
+ * @author Myeonghyeon Lee
  * @since 1.1
  */
 class SelectStatementVisitor extends DelegatingVisitor implements PartRenderer {
@@ -125,6 +126,8 @@ public Delegation doLeave(Visitable segment) {
 				builder.append(" FROM ").append(from);
 			}
 
+			builder.append(selectRenderContext.afterFromTable().apply(select));
+
 			if (join.length() != 0) {
 				builder.append(' ').append(join);
 			}