Method optPos

basex-core/src/main/java/org/basex/query/expr/Cmp.java:370–376

Positional optimizations. @param op comparison operator @param cc compilation context @return optimized or original expression @throws QueryException query exception

(final CmpOp op, final CompileContext cc)

   * @throws QueryException query exception
   */
  private Expr optPos(final CmpOp op, final CompileContext cc) throws QueryException {
    if(POSITION.is(exprs[0]) && exprs[1].seqType().type.isNumberOrUntyped()) {
      final Expr expr = Pos.get(exprs[1], op, info, cc, null);
      if(expr != null) return expr;
    }
    return this;
  }

  /**
   * Analyzes the comparison and returns its optimization type.