The requirement is to search partial phrases in a block of text. Most of the words will be standard length. I want to keep the max_gram value down to 10. But there may be the occasional id/code with more characters than that, and these show up if I type in a query where the first 10 characters match, but then the rest don't.
For example, here is the mapping:
PUT my_index
{
"settings": {
"analysis": {
"analyzer": {
"autocomplete": {
"tokenizer": "autocomplete",
"filter": [
"lowercase"
]
}
},
"tokenizer": {
"autocomplete": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 10,
"token_chars": [
"letter"
]
}
}
}
},
"mappings": {
"doc": {
"properties": {
"title": {
"type": "text",
"analyzer": "autocomplete"
}
}
}
}
}
and document:
POST my_index/doc/1
{
"title": "Quick fox with id of ABCDEFGHIJKLMNOP"
}
If I run the query:
POST my_index/doc/_search
{
"query": {
"match_phrase": {
"title": {
"query": "fox wi"
}
}
}
}
It returns the document as expected. However, if I run this:
POST my_index/doc/_search
{
"query": {
"match_phrase": {
"title": {
"query": "ABCDEFGHIJxxx"
}
}
}
}
It also returns the document, when it shouldn't. It will do this if the x's are after the 10th character, but not before it. How can I avoid this?
I am using version 5.