原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/index-prefixes.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
index_prefixesedit
The index_prefixes parameter enables the indexing of term prefixes to speed
up prefix searches. It accepts the following optional settings:
|
|
The minimum prefix length to index. Must be greater than 0, and defaults to 2. The value is inclusive. |
|
|
The maximum prefix length to index. Must be less than 20, and defaults to 5. The value is inclusive. |
This example creates a text field using the default prefix length settings:
PUT my_index
{
"mappings": {
"properties": {
"body_text": {
"type": "text",
"index_prefixes": { }
}
}
}
}
This example uses custom prefix length settings:
PUT my_index
{
"mappings": {
"properties": {
"full_name": {
"type": "text",
"index_prefixes": {
"min_chars" : 1,
"max_chars" : 10
}
}
}
}
}