You can define a fielded search operation with the fieldName:searchExpression syntax, where the search expression can be a single word or a phrase, or a more complex expression in parentheses, optionally with Boolean operators.
APACHE LUCENE INDEXING AND SEARCHING FULL
A single negation such as the query -luxury isn't allowed in full search syntax and will always return an empty result set.ġ The | character isn't supported for OR operations.
This gives you a more intuitive behavior for negations by default. In full syntax, negations will always be ANDed onto the query such that wifi -luxury is interpreted as "wifi AND NOT luxury" regardless of if the searchMode parameter is set to any or all. It's important to note that the NOT operator ( NOT, !, or -) behaves differently in full syntax than it does in simple syntax. For example, wifi –luxury will search for documents that have the wifi term but not luxury. Returns matches on documents that exclude the term.
Because OR is the default conjunction operator, you could also leave it out, such that wifi luxury is the equivalent of wifi OR luxury. In the example, the query engine will return match on documents containing either wifi or luxury or both. For example, +wifi +luxury stipulates that both terms must appear somewhere in the field of a single document.įinds a match when either term is found.
APACHE LUCENE INDEXING AND SEARCHING PLUS
The plus character ( +) can also be used directly in front of a term to make it required. In the example, the query engine will look for documents containing both wifi and luxury. Specifies terms that a match must contain. Always specify text boolean operators (AND, OR, NOT) in all caps.
The full syntax supports text operators in addition to character operators. You can embed Boolean operators in a query string to improve the precision of a match. Special characters that require escaping include the following: + - & | ! ( ) | \ ^ ~. Similarly, an escaped phone number pattern might look like this \+1 \(800\) 642\-7676. For example, for a wildcard search on where :// is part of the query string, you would specify search=https\:\/\/*. In order to use any of the search operators as part of the search text, escape the character by prefixing it with a single backslash ( \). The example above is the tilde (~), but the same principle applies to every operator. In this case, assuming the query is a term or phrase query, full text search with lexical analysis strips out the ~ and breaks the term "business~analyst" in two: business OR analyst. Within a term, such as "business~analyst", the character isn't evaluated as an operator. When placed at the end of a term, ~ invokes fuzzy search. When placed after a quoted phrase, ~ invokes proximity search. Placement determines whether a symbol is interpreted as an operator or just another character in a string.įor example, in Lucene full syntax, the tilde (~) is used for both fuzzy search and proximity search. The following syntax fundamentals apply to all queries that use the Lucene syntax. For details about the query request and parameters, including searchMode, see Search Documents (REST API). Whenever operators are on the query, you should generally set searchMode=all to ensure that all of the criteria is matched.įor more examples, see Lucene query syntax examples. While not specific to any query type, the searchMode parameter is relevant in this example. "search": "category:budget AND \"recently renovated\"^3", POST /indexes/hotels-sample-index/docs/search?api-version= Any documents containing the phrase "recently renovated" are ranked higher as a result of the term boost value (3). It looks for hotels where the category field contains the term "budget". This particular example shows in-field search and term boosting. The following example is a search request constructed using the full syntax. In REST, query expressions are provided in the search parameter of a Search Documents (REST API) request. To use full Lucene syntax, you'll set the queryType to "full" and pass in a query expression patterned for wildcard, fuzzy search, or one of the other query forms supported by the full syntax. Much of the Lucene Query Parser syntax is implemented intact in Azure Cognitive Search, except for *range searches, which are constructed through $filter expressions. When creating queries in Azure Cognitive Search, you can opt for the full Lucene Query Parser syntax for specialized query forms: wildcard, fuzzy search, proximity search, regular expressions.
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