A record-oriented layer built for the FoundationDB key-value store.

This layer is designed to extend the FoundationDB key-value store by adding a record-oriented data model. Though this layer does not attempt to implement SQL, it does provide relational semantics (broadly defined). In particular, it attempts to provide solutions to:

• Schema management
• Index maintenance
• Query planning and optimization

The basic unit of data is the "record". This corresponds to a "row" in a traditional relational system or to a "document" in a document database. Records are grouped together into "record stores", which are somewhat analogous to a "database" in a traditional relational database, and each record also has a "type" which is somewhat (but not quite) analogous to a "table". (See, however, "Are record types tables?" in the FAQ for an explanation of the differences between the two concepts.)

For a more complete overview of the features and goals of the Record Layer, consult the Record Layer overview.

Packages

Package	Description
com.apple.foundationdb.record	A record layer for FoundationDB based on Protocol Buffers.
com.apple.foundationdb.record.cursors	Cursor implementation classes.
com.apple.foundationdb.record.logging	Helper classes for logging.
com.apple.foundationdb.record.metadata	Record meta-data structures.
com.apple.foundationdb.record.metadata.expressions	Record keys used in indexes and the primary storage.
com.apple.foundationdb.record.provider.common	Support classes that do not depend on FoundationDB.
com.apple.foundationdb.record.provider.common.text	Support classes for text indexing.
com.apple.foundationdb.record.provider.foundationdb	Classes for FoundationDB record storage.
com.apple.foundationdb.record.provider.foundationdb.clientlog	Classes for interacting with system key client logs in record layer terms.
com.apple.foundationdb.record.provider.foundationdb.cursors	Record cursors that depend on having access to an actual record store.
com.apple.foundationdb.record.provider.foundationdb.indexes	Index maintainer classes.
com.apple.foundationdb.record.provider.foundationdb.keyspace	A directory-like symbolic layout of keys in FoundationDB.
com.apple.foundationdb.record.provider.foundationdb.layers.interning	A layer for mapping potentially long strings to and from more compact tuple elements.
com.apple.foundationdb.record.provider.foundationdb.leaderboard	Maintain leaderboard as multiple time-windowed ranked sets (so that old scores fall off).
com.apple.foundationdb.record.provider.foundationdb.storestate	Classes for caching RecordStoreState information.
com.apple.foundationdb.record.provider.foundationdb.synchronizedsession	Extends the com.apple.foundationdb.synchronizedsession package to support running operations in synchronized sessions with FDBDatabaseRunners and FDBRecordContexts.
com.apple.foundationdb.record.query	Classes for querying records.
com.apple.foundationdb.record.query.expressions	Classes implementing logical query expression.
com.apple.foundationdb.record.query.plan	Query planner classes.
com.apple.foundationdb.record.query.plan.bitmap	Classes relating to bitmap operations over BITMAP_VALUE index entries.
com.apple.foundationdb.record.query.plan.planning	Support classes for query planning.
com.apple.foundationdb.record.query.plan.plans	Classes implementing executable query plan elements.
com.apple.foundationdb.record.query.plan.synthetic	Classes relating to hooking up join index synthetic records to the query planner.
com.apple.foundationdb.record.query.plan.temp	This will contain design docs for the Cascades planner at some point.
com.apple.foundationdb.record.query.plan.temp.debug	Stub for planner debugger
com.apple.foundationdb.record.query.plan.temp.explain	This package implements a visualization of a RelationalExpression as a graph for both internal debugging purposes and for consumption by end-users.
com.apple.foundationdb.record.query.plan.temp.expressions	A variety of planner-specific RelationalExpression implementations which will never be used outside of the planner.
com.apple.foundationdb.record.query.plan.temp.matchers	Classes related to the Cascades matcher system and its implementation.
com.apple.foundationdb.record.query.plan.temp.matching	This package contains everything related to graph matching.
com.apple.foundationdb.record.query.plan.temp.properties	A package for planner properties (in the sense that Cascades uses them).
com.apple.foundationdb.record.query.plan.temp.rules	A package containing the rules used by the planner.
com.apple.foundationdb.record.query.plan.temp.view	Classes related to the ViewExpression abstraction.
com.apple.foundationdb.record.query.plan.visitor	A package of classes in the visitor pattern that perform substitutions on a tree of RecordQueryPlans.
com.apple.foundationdb.record.query.predicates	Implementations of query predicates
com.apple.foundationdb.record.util	Miscellaneous record layer support classes.