大数据计算MaxCompute 为啥这条SQL无法执行呢？

大数据计算MaxCompute 中SELECT '123456' RLIKE '^(-|+)?\d+(.\d+)?$' 为啥这条SQL无法执行呢 报错是FAILED: ODPS-0130071:[0,0] Semantic analysis exception - physical plan generation failed: java.lang.RuntimeException: SQL Runtime Unretryable Error: ODPS-0121011:Invalid regular expression pattern - in function RLIKE, regular expression call failed, error message:'nothing to repeat', error offset in pattern is 4, the pattern is ^(-|+)?d+(.d+)?$, please check regular expression pattern 多次检查过正则表达式了，没问题呀，想匹配 +8 -8 +8.8 -8.8 也就是匹配正数、负数、和小数