Hi,
This happens because of query normalization: the query normalization factor
is 1/boost so in the end the score is multiplied by the boost and then
divided by the boost again in the end, so the score remains 0.
However, this doesn't mean that the boost is always ignored! For example,
if you wrap two constant-score queries into a boolean query:
{
"query": {
"bool": {
"should": [
{
"constant_score": {
"filter": {
"term": {
"fifled": "value1"
}
},
"boost": 2
}
},
{
"constant_score": {
"filter": {
"term": {
"field": "value2"
}
},
"boost": 5
}
}
]
}
}
}
Documents that match "value2" will get a higher score than documents that
match "value1".
--
Adrien Grand
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