Method unparse

core/src/main/java/org/apache/calcite/sql/SqlNode.java:214–217

Writes a SQL representation of this node to a writer. The leftPrec and rightPrec parameters give us enough context to decide whether we need to enclose the expression in parentheses. For example, we need parentheses around "2 + 3" if preceded by "5 ". This is because th

(
      SqlWriter writer,
      int leftPrec,
      int rightPrec)

   * @param rightPrec The precedence of the {@link SqlNode} immediately
   */
  public abstract void unparse(
      SqlWriter writer,
      int leftPrec,
      int rightPrec);

  public void unparseWithParentheses(SqlWriter writer, int leftPrec,
      int rightPrec, boolean parentheses) {