问题描述
我在elastic中保存了以下数据
{
"data" : {
"c1" : -0.343404934,"c2" : -0.1234212345,"c3" : 0.003404934
}
}
我需要用平方根对每个领域的力量进行排序。
在 sql 我会写它:
SELECT c1,c2,c3 from table
ORDER BY sqrt(
power(c1 - external_param_c1,2) + power(c2 - external_param_c2,2) + power(c2 - external_param_c3,2)
)
如何将其转换为弹性?
谢谢
解决方法
看起来您需要使用 scripted sort 的 Math
painless library:
{
"sort": [
{
"_script": {
"type": "number","order": "desc","script": {
"source": "Math.sqrt(Math.pow(doc['data.c1'].value - params.external_param_c1,2) + Math.pow(doc['data.c2'].value - params.external_param_c2,2) + Math.pow(doc['data.c3'].value - params.external_param_c3,2))","params": {
"external_param_c1": 1,"external_param_c2": 2,"external_param_c3": 3
}
}
}
}
]
}