Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Service Management2017.11

Administer > Database administration > Data persistence > Keys and indexes in HPE Service Manager > Key type definitions > Tuning: Key selection algorithms

Tuning: Key selection algorithms

A key selection algorithm selects a key to perform a query based on the order of the fields in the query expression, and the order of the fields in the keys defined in the dbdict. The system then assigns a weight to each key based on the order in which the fields appear in the query for the key, and the order in which they appear in the query and key. For example, if the first field in a key matches the first field in the query, Service Management assigns that key a higher weight than one that has that field as the second field in the key. The system makes the decision for all fields in the query and keys.

Example query and keys:

query:	a=1 and b=2 and c=3 and d=4
	key1: b,c,d
	key2: a,c,d
	key3: a,b
	key4: a

In this example, the key selection algorithm selects key3. The next highest weight is key2, followed by key4 and key1. The new key selection is based on the location database dictionary record with the keys {location}, {location,state}, {location,city}, {location.name,location}, and {location.code}.

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