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There are 23 different Comparison Types:
FreeText
This comparison Type is unique. All Filters with a FreeText Comparison Type are gathered into a single filter with an ID of "freetext".
Due to the inner workings of how such filters work, any search, which has a freetext filter MUST be populated.
FreeTextAutoAsterixing
Equals
Tests whether a Filter's parameter matches exactly with the data, the filter works on.
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Accepts a single parameter.
EqualsWithZeroAsNull
The same as Equals, but treats a value of "0" as null.
Accepts a single parameter.
EqualsOrNull
The same as with Equals except that results with a null value are not filtered out.
Accepts a single parameter.
AllInList
Filters out any items with data, which does not exactly match all the supplied parameters.
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This filter will filter out any items, whose keywords does not contain the supplied keywords, ie if an asset has the keywords "pink", "fluffy", "SithLord" and a user inputs "pink" and "kitten", then the "pink fluffy Sith lord" asset will be filtered out. If the user inputs "pink" and "fluffy" then the Sith lord will be returned.
Accepts 1-many parameters.
InList
Filters out any items with data, which does not exactly match any of the supplied parameters.
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Using this filter, if a user inputs "pink" and "kitten", then in this case, the "pink fluffy sith lord" will not be filtered out because one of the asset's keywords is "pink".
NotInList
Filters out any results, which does match any of the supplied parameters.
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If a user inputs "pink" and "kitten" then the "pink fluffy sith lord" asset will be filtered out, because one of its keywords is "pink".
Like/LikeAutoAsterixing
Works almost exactly like the SQL "like" operator.
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If the user inputs "*key*" or "*key", the like statement becomes "like %key%".
Between
"Between" is a very specific Comparison Type: it can only be used with filters, which does work on dates or DateTimes, eg "asset.start_date" and "asset.end_date".
If a similar functionality is needed, but in the context of data other than dates or DateTimes, eg filtering out results whose IDs are not between 5 and 11, that functionality MUST be mimicked by creating two filters. An example of such two filters can be two filters with respective Comparison Types of LessThan, with a parameter value of 11 and GreaterThan, with a parameter value of 5.
GreaterThan
Filters out any results whose data is not greater than the supplied parameter, ie it works exactly like the ">" operator.
LessThan
Filters out any results whose data is not less than the supplied parameter, ie it works exactly like the "<" operator.
EqualsOrGreaterThan
Filters out any results whose data is not equal to or greater than the supplied parameter, ie it works exactly like the "=>" operator.
EqualsOrLessThan
Filters out any results whose data is not equal to or less than the supplied parameter, ie it works exactly like the "=<" operator.