ignore_above
编辑ignore_above
编辑长度超过 ignore_above 设置的字符串将不会被索引或存储。对于字符串数组，ignore_above 将分别应用于每个数组元素，长度超过 ignore_above 的字符串元素将不会被索引或存储。
如果启用了 _source 字段（Elasticsearch 默认启用），则所有字符串/数组元素仍然存在于 _source 字段中。
resp = client.indices.create(
index="my-index-000001",
mappings={
"properties": {
"message": {
"type": "keyword",
"ignore_above": 20
}
}
},
)
print(resp)
resp1 = client.index(
index="my-index-000001",
id="1",
document={
"message": "Syntax error"
},
)
print(resp1)
resp2 = client.index(
index="my-index-000001",
id="2",
document={
"message": "Syntax error with some long stacktrace"
},
)
print(resp2)
resp3 = client.search(
index="my-index-000001",
aggs={
"messages": {
"terms": {
"field": "message"
}
}
},
)
print(resp3)
response = client.indices.create(
index: 'my-index-000001',
body: {
mappings: {
properties: {
message: {
type: 'keyword',
ignore_above: 20
}
}
}
}
)
puts response
response = client.index(
index: 'my-index-000001',
id: 1,
body: {
message: 'Syntax error'
}
)
puts response
response = client.index(
index: 'my-index-000001',
id: 2,
body: {
message: 'Syntax error with some long stacktrace'
}
)
puts response
response = client.search(
index: 'my-index-000001',
body: {
aggregations: {
messages: {
terms: {
field: 'message'
}
}
}
}
)
puts response
const response = await client.indices.create({
index: "my-index-000001",
mappings: {
properties: {
message: {
type: "keyword",
ignore_above: 20,
},
},
},
});
console.log(response);
const response1 = await client.index({
index: "my-index-000001",
id: 1,
document: {
message: "Syntax error",
},
});
console.log(response1);
const response2 = await client.index({
index: "my-index-000001",
id: 2,
document: {
message: "Syntax error with some long stacktrace",
},
});
console.log(response2);
const response3 = await client.search({
index: "my-index-000001",
aggs: {
messages: {
terms: {
field: "message",
},
},
},
});
console.log(response3);
PUT my-index-000001
{
"mappings": {
"properties": {
"message": {
"type": "keyword",
"ignore_above": 20
}
}
}
}
PUT my-index-000001/_doc/1
{
"message": "Syntax error"
}
PUT my-index-000001/_doc/2
{
"message": "Syntax error with some long stacktrace"
}
GET my-index-000001/_search
{
"aggs": {
"messages": {
"terms": {
"field": "message"
}
}
}
}
可以使用 更新映射 API 更新现有字段的 ignore_above 设置。
此选项也可用于防止超过 Lucene 的术语字节长度限制 32766。
ignore_above 的值是 *字符计数*，但 Lucene 计数的是字节。如果您使用包含许多非 ASCII 字符的 UTF-8 文本，则可能需要将限制设置为 32766 / 4 = 8191，因为 UTF-8 字符最多可能占用 4 个字节。