Method accept

core/src/main/java/org/apache/calcite/sql/SqlNode.java:290–290

Accepts a generic visitor. Implementations of this method in subtypes simply call the appropriate visit method on the org.apache.calcite.sql.util.SqlVisitor visitor object. The type parameter R must be consistent with the type parameter of the visitor.

(SqlVisitor<R> visitor)

   * parameter of the visitor.
   */
  public abstract <R> R accept(SqlVisitor<R> visitor);

  /**
   * Returns whether this node is structurally equivalent to another node.