lsst.dax.apdb

Contributing

lsst.dax.apdb is developed at https://github.com/lsst/dax_apdb. You can find Jira issues for this module under the dax_apdb component.

Python API reference

lsst.dax.apdb Package

Classes

Apdb()	Abstract interface for APDB.
ApdbCassandra(config)	Implementation of APDB database on to of Apache Cassandra.
ApdbCassandraConfig(*args, **kw)	Configuration class for Cassandra-based APDB implementation.
ApdbConfig(*args, **kw)	Part of Apdb configuration common to all implementations.
ApdbMetadata()	Interface for accessing APDB metadata.
ApdbReplica()	Abstract interface for APDB replication methods.
ApdbSql(config)	Implementation of APDB interface based on SQL database.
ApdbSqlConfig(*args, **kw)	APDB configuration class for SQL implementation (ApdbSql).
ApdbTableData()	Abstract class for representing table data.
ApdbTables(value[, names, module, qualname, ...])	Names of the tables in APDB schema.
IncompatibleVersionError	Exception raised when version numbers are not compatible.
ReplicaChunk(id, last_update_time, unique_id)	Class used for identification of replication chunks.
VersionTuple(major, minor, patch)	Class representing a version number.

lsst.dax.apdb.schema_model Module

Classes

CheckConstraint(name, id, deferrable, ...)	Description of check constraint.
Column(name, id, datatype, length, nullable, ...)	Column representation in schema.
Constraint(name, id, deferrable, initially, ...)	Constraint description, this is a base class, actual constraints will be instances of one of the subclasses.
ExtraDataTypes(value[, names, module, ...])	Additional column data types that we need in dax_apdb.
ForeignKeyConstraint(name, id, deferrable, ...)	Description of foreign key constraint.
Index(name, id, columns, expressions, ...)	Index representation.
Schema(name, id, tables, version, ...)	Complete schema description, collection of tables.
Table(name, id, columns, primary_key, ...)	Description of a single table schema.
UniqueConstraint(name, id, deferrable, ...)	Description of unique constraint.

Command line tools

This package provides a command line utility that can be used for some management operations. The name of the CLI script is apdb-cli and it has a number of subcommands:

• create-sql is used to create new APDB instances based on SQL relational database technology.

• create-cassandra is used to create new APDB instances based on Cassandra storage technology.

• list-index dumps the contents of the APDB index file.

Each sub-command provides command line help describing its arguments.