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Merge remote-tracking branch 'dakrone/document-fvf-modifiers'

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Lee Hinman 2016-03-10 11:45:04 -07:00
parent 64c4b5f3ca 982a369efc
commit d5a37db369
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docs/reference/query-dsl/function-score-query.asciidoc
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@ -215,6 +215,20 @@ There are a number of options for the `field_value_factor` function:
`log1p`, `log2p`, `ln`, `ln1p`, `ln2p`, `square`, `sqrt`, or `reciprocal`.
Defaults to `none`.
|====================================
| Modifier | Meaning
| `none` | Do not apply any multiplier to the field value
| `log` | Take the https://en.wikipedia.org/wiki/Logarithm[logarithm] of the field value
| `log1p` | Add 1 to the field value and take the logarithm
| `log2p` | Add 2 to the field value and take the logarithm
| `ln` | Take the https://en.wikipedia.org/wiki/Natural_logarithm[natural logarithm] of the field value
| `ln1p` | Add 1 to the field value and take the natural logarithm
| `ln2p` | Add 2 to the field value and take the natural logarithm
| `square` | Square the field value (multiply it by itself)
| `sqrt` | Take the https://en.wikipedia.org/wiki/Square_root[square root] of the field value
| `reciprocal` | https://en.wikipedia.org/wiki/Multiplicative_inverse[Reciprocate] the field value, same as `1/x` where `x` is the field's value
`missing`::
Value used if the document doesn't have that field. The modifier