Method optimizePos

basex-core/src/main/java/org/basex/query/expr/Expr.java:409–412

Optimizes an expression for positional access. Overwritten by Itr, Range, RangeSeq}. @param op comparison operator @param cc compilation context @return boolean result, optimized or original expression @throws QueryException query exception

(final CmpOp op, final CompileContext cc)

   * @throws QueryException query exception
   */
  @SuppressWarnings("unused")
  public Expr optimizePos(final CmpOp op, final CompileContext cc) throws QueryException {
    return simplifyFor(Simplify.NUMBER, cc).simplifyFor(Simplify.DISTINCT, cc);
  }

  /**
   * Checks if an expression can be rewritten to an index access.