My client wants a search that returns both prefix and exact matches per
token. Most (but not all) of the text being searched is human names. The
idea is that "jane smith" and "smith, j" and "j smit" will all return the
same document, so I'm using tokens.
The trick is that it needs to be an "and" search: all tokens in the search
string must be present in the results. And the prefix query does not seem
to offer this option. Edgengram would be a great answer, but the client
wants results returned alphabetically - using no relevance at all - and the
long tail on ngram searches makes the alpha sort unfeasible.
So for now I'm using a simple keyword tokenizer (plus some custom
analyzers) to index, and then splitting the search string on spaces to
build queries like the below. It seems very awkward / cumbersome / brittle.
All suggestions appreciated.
{
"query" : {
"bool" : {
"must" : [{
"bool" : {
"should" : [{
"match" : {
"text" : "j"
}
}, {
"prefix" : {
"text" : "j"
}
}
]
}
}, {
"bool" : {
"should" : [{
"match" : {
"text" : "smith"
}
}, {
"prefix" : {
"text" : "smith"
}
}
]
}
}
]
}
}
}
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