elasticsearch 数学函数不适用于ElasticSearch脚本中的运算符

ES版本：

编号：“7.0.1”，

以下查询不起作用。它返回

非法参数\u异常

（下面是完整堆栈）

我认为

doc['some_FIELD'].value可能有问题，但显然
Math.*
函数在使用运算符时存在语法问题（
+
）


“source:“Math.log（doc['SOME_FIELD'].value+1）”
不起作用
“source:“Math.log（1+1）”
不起作用

当


“source”：“doc['SOME_FIELD'].value”
有效
“源”：“1+1”起作用

“source:“Math.log（1）”
有效

完整堆栈跟踪：

{
      "error": {
        "root_cause": [
          {
            "type": "script_exception",
            "reason": "compile error",
            "script_stack": [
              "NaN",
              "^---- HERE"
            ],
            "script": "NaN",
            "lang": "painless"
          }
        ],
        "type": "search_phase_execution_exception",
        "reason": "all shards failed",
        "phase": "query",
        "grouped": true,
        "failed_shards": [
          {
            "shard": 0,
            "index": "index",
            "node": "69HAL8sMS-afWoTxhMteKw",
            "reason": {
              "type": "query_shard_exception",
              "reason": "script_score: the script could not be loaded",
              "index_uuid": "ASy6y5zxRpqMFONSLED6IQ",
              "index": "index",
              "caused_by": {
                "type": "script_exception",
                "reason": "compile error",
                "script_stack": [
                  "NaN",
                  "^---- HERE"
                ],
                "script": "NaN",
                "lang": "painless",
                "caused_by": {
                  "type": "illegal_argument_exception",
                  "reason": "Variable [NaN] is not defined."
                }
              }
            }
          }
        ],
        "caused_by": {
          "type": "script_exception",
          "reason": "compile error",
          "script_stack": [
            "NaN",
            "^---- HERE"
          ],
          "script": "NaN",
          "lang": "painless",
          "caused_by": {
            "type": "illegal_argument_exception",
            "reason": "Variable [NaN] is not defined."
          }
        }
      },
      "status": 400
    }

doc['SOME_FIELD']中的值可能不是数字（NaN）。根据您期望的数字类型，您可以（并且应该）使用正则表达式计算脚本中的值，以确定其是否正确解析，如下所示：

def m = /^([0-9]+)$/.matcher(doc['SOME_FIELD'].value);
if (m.matches()) { 
  def number = Integer.parseInt(doc['SOME_FIELD'].value);
    if (number == SOMENUMBER) return true;
    else return false;
} else return false;

请记住，如果您正在运行此脚本，您将希望将脚本全部放在一行上

此外，如果集群上还没有（在elasticsearch yaml文件中）启用正则表达式，则需要在集群上启用正则表达式

def m = /^([0-9]+)$/.matcher(doc['SOME_FIELD'].value);
if (m.matches()) { 
  def number = Integer.parseInt(doc['SOME_FIELD'].value);
    if (number == SOMENUMBER) return true;
    else return false;
} else return false;