The MATCHCOVER field specifier (case sensitive) allows you to find documents in which the values in all instances of a specified field have matches in the set of string values provided in the specifier. In other words, the specifier must cover all instances of the field. A search using MATCHCOVER is slower than one using MATCH.
To match numeric values, use EQUALCOVER.
Note: You can optimize the field specifier speed by configuring the field with the and property types (the field specifier is optimized only if you specify both property types).
Note: To use the MATCHCOVER field specifier against fields that were added using the index action, you must define the fields as .
To use the MATCHCOVER field specifier for fields that contain multiple identical values that might match, you must define the fields as .
FieldText=MATCHCOVER{yourStrings}:yourField
yourStrings
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One or more strings. A document is returned only if the value in each of its instances of Note: To distinguish query syntax punctuation from punctuation within strings, double-percent-encode commas and curly braces within strings. Query syntax punctuation must be left unencoded. There must be no space before or after a separator comma. |
yourField
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The name of the field to match against. A document returns only if:
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FieldText=MATCHCOVER{Confidential,Secret,TopSecret,FBI}:SECURITYLEVEL
For a document to return as a result, its SECURITYLEVEL fields must have no values that are not in the specified list. For example, if a document includes a SECURITYLEVEL field with the value MI5, it does not return.
(If a document has no SECURITYLEVEL field at all, it returns.)
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