# Packages
Package applycfg contains code for persisting applier configurations.
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Package batches contains support code for working with and testing batches of data.
Package cmap contains an implementation of a canonicalizing map.
Package crep ("see-rep") contains a utility for producing a Canonical REPresentation of a value type and for comparing objects using a fuzzy equivalence relationship.
Package diag contains a mechanism for Replicator components to report structured diagnostic information.
Package fscopy contains a utility for copying the contents of an [fs.FS] into the OS filesystem.
Package hlc contains a trivial representation of CockroachDB's hybrid logical clock timestamp.
Package httpauth contains a common function for extracting credentials from an HTTP request.
Package ident contains types for safely representing SQL identifiers.
Package lockset contains a utility type that orders access to multiple resources.
Package logfmt adds additional details to log messages with errors.
Package merge provides support for three-way merge operations.
Package metrics contains some common utility functions for constructing performance-monitoring metrics.
Package msort contains utility functions for sorting and de-duplicating batches of mutations.
Package pjson implements a parallelized wrapper for encoding and decoding json objects.
Package retry contains utility code for retrying database transactions.
Package secure provides utilities to configure secure transport.
Package serial allows an otherwise-concurrent use of a database pool to be transparently deoptimized into serial use of a single transaction.
Package stamp contains a utility for maintaining certain ordering invariants when queuing (time-)stamped values.
Package stdlogical contains a template for building a standard logical-replication CLI command.
Package stdpool creates standardized database connection pools.
Package stdserver contains a generic HTTP server that can be used by sources that receive http requests.
Package stmtcache provides a cache for prepared statements.
Package subfs contains as [fs.FS] that performs string substitutions.
Package txguard provides a utility class that keeps a database transaction active on a periodic basis.
Package workload contains utility types for creating synthetic workloads.