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SOLR-10521: documenting sort=childfield(field) asc

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Mikhail Khludnev 2017-06-06 00:27:15 +03:00
parent 357f4dfb18
commit 7646f91097
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4
solr/solr-ref-guide/src/function-queries.adoc
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@ -86,6 +86,10 @@ The table below summarizes the functions available for function queries.
|===
|Function |Description |Syntax Examples
|abs |Returns the absolute value of the specified value or function. |`abs(x)` `abs(-5)`
|childfield(field)|Returns the value of the given field for one of the matched child docs when searching by <<other-parsers.adoc#OtherParsers-BlockJoinParentQueryParser,{!parent}>>. It can be used only in `sort` parameter|
* `sort=childfield(name) asc` implies `$q` as a second argument and therefor it assumes `q={!parent ..}..`;
* `sort=childfield(field,$bjq) asc` refers to a separate parameter `bjq={!parent ..}..`;
* `sort=childfield(field,{!parent of=...}...) desc` allows to inline block join parent query
|concat(v,f..)|concatenates the given string fields, literals and other functions |`concat(name," ",$param,def(opt,"-"))`
|"constant" |Specifies a floating point constant. |`1.5`
|def |`def` is short for default. Returns the value of field "field", or if the field does not exist, returns the default value specified. and yields the first value where `exists()==true`.) |`def(rating,5):` This `def()` function returns the rating, or if no rating specified in the doc, returns 5 `def(myfield, 1.0):` equivalent to `if(exists(myfield),myfield,1.0)`