Method indexOfDeep

core/src/main/java/org/apache/calcite/sql/SqlUtil.java:170–178

Finds the index of an expression in a list, comparing using SqlNode#equalsDeep(SqlNode, Litmus).

(List<? extends SqlNode> list, SqlNode e,
      Litmus litmus)

  /** Finds the index of an expression in a list, comparing using
   * {@link SqlNode#equalsDeep(SqlNode, Litmus)}. */
  public static int indexOfDeep(List<? extends SqlNode> list, SqlNode e,
      Litmus litmus) {
    for (int i = 0; i < list.size(); i++) {
      if (e.equalsDeep(list.get(i), litmus)) {
        return i;
      }
    }
    return -1;
  }

  /**
   * Returns whether a node represents the NULL value.