1 files changed, 28 insertions, 0 deletions
diff --git a/src/library/scala/dbc/statement/expression/UnaryOperator.scala b/src/library/scala/dbc/statement/expression/UnaryOperator.scala
new file mode 100644
index 0000000000..1e7ab028f7
--- /dev/null
+++ b/src/library/scala/dbc/statement/expression/UnaryOperator.scala
@@ -0,0 +1,28 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2005, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+package scala.dbc.statement.expression;
+
+abstract class UnaryOperator extends Expression {
+
+  /** The name of the operator */
+  def operator: String;
+
+  /** Whether the operator comes before the operand or not. */
+  def operatorIsLeft: Boolean;
+
+  /** The operand applied to the operator. */
+  def operand: Expression;
+
+  /** A SQL-99 compliant string representation of the relation sub-
+   * statement. This only has a meaning inside another statement. */
+  def sqlInnerString: String = operatorIsLeft match {
+    case true => operator + " " + operand.sqlInnerString;
+    case false => operand.sqlInnerString + " " + operator;
+  }
+}