Having this field in my mapping
"answer": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above":
}
}
},
I try to execute this aggregation
"aggs": {
"answer": {
"terms": {
"field": "answer"
}
},
but I get this error
"type": "illegal_argument_exception",
"reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [answer] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory."
得到解决
You need to aggregate on thekeyword
sub-field, like this:
"aggs": {
"answer": {
"terms": {
"field": "answer.keyword"
}
},
开始在网上查询解决方案时,有的是修改mapping
1.PUT my_index/_mapping/my_type
{
"properties": {
"my_field": {
"type": "text",
"fielddata": true
}
}
} 或者
2.使用.keyword 推荐
"aggs": {
"answer": {
"terms": {
"field": "answer.keyword"
}
}