com.foursquare.index

IndexChecker

trait IndexChecker extends AnyRef

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MongoIndexChecker
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  1. abstract def validateIndexExpectations(query: Query[_, _, _], indexes: List[UntypedMongoIndex]): Boolean

    Verifies that the indexes expected for a query actually exist in the mongo database.

    Verifies that the indexes expected for a query actually exist in the mongo database. Logs an error via QueryLogger#logIndexMismatch if there is no matching index. This version of validaateIndexExpectations is intended for use in cases where the indexes are not explicitly declared in the class, but the caller knows what set of indexes are actually available.

    query

    the query being validated.

    indexes

    a list of the indexes

    returns

    true if the required indexes are found, false otherwise.

  2. abstract def validateQueryMatchesSomeIndex(query: Query[_, _, _], indexes: List[UntypedMongoIndex]): Boolean

    Verifies that the index expected by a query both exists, and will be used by MongoDB to execute that query.

    Verifies that the index expected by a query both exists, and will be used by MongoDB to execute that query. (Due to vagaries of the MongoDB implementation, sometimes a conceptually usable index won't be found.)

    query

    the query

    indexes

    the list of indexes that exist in the database

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