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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.
To use the
MATCHCOVER field specifier for fields that contain multiple identical values that might match, you must define the fields as
One or more strings. A document is returned only if the value in each of its instances of
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.
The name of the field to match against. A document returns only if:
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.)