Hi All,
Starting to play with function_score and doc_values...
I have a set of 30 documents with integers, ranging from 1 to 30.
Now I want a query that returns all documents with value 5 on top, followed
by the rest of the documents, scored by their distance to 5.
Query:
"query": {
"function_score": {
"query": {"match_all": {}},
"boost_mode": "replace",
"functions": [
{
"gauss": {
"int_field": {
"origin": 5,
"scale": 5,
"offset": 2,
"decay" : 0.1
}}
}
]
}
}
This returns the document with 5 with a score of 1 (expected), followed by
the rest of the documents with a score 0 (NOT expected).
Does someone see what I'm doing wrong?
Looking at the explain, I see weird values for the doc_values.
Following is the explain for the top document (with 5 as its value). Note
the stated values for doc_value and origin!
"_explanation": {
"value": 1,
"description": "function score, product of:",
"details": [
{
"value": 1,
"description": "Math.min of",
"details": [
{
"value": 1,
"description": "function score, score mode
[multiply]",
"details": [
{
"value": 1,
"description": "function score, product
of:",
"details": [
{
"value": 1,
"description": "match filter: *:*"
},
{
"value": 1,
"description": "Function for field
int_field:",
"details": [
{
"value": 1,
"description":
"exp(-0.5*pow(MIN of: [Math.max(Math.abs(-6.20093664E13(=doc value) -
-6.20093664E13(=origin))) - 2.0(=offset), 0)],2.0)/5.428681023790649)"
}
]
}
]
}
]
},
{
"value": 3.4028235e+38,
"description": "maxBoost"
}
]
},
Best regards,
Jan
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