Date Expression Operators 日期表达式运算符Accumulators($group, $bucket, $bucketAuto, $setWindowFields) 累加器Comparison Expression Operators 比较表达式运算符Conditional Expression Operators 条件表达式运算符String Expression Operators 字符串表达式运算符Boolean Expression Operators 布尔表达式运算符Array Expression Operations 数组表达式运算符
