README
¶
Objectives
Service fq-connector-go is a part of YDB Federated Query system.
It's an extension point making YDB capable of interaction with various external data sources.
You can deploy fq-connector-go alongside with YDB in order to query and handle
data extracted from the external sources.
Currently supported data sources:
- ClickHouse
- PostgreSQL
- YDB
Usage
- Architecture overview
- YDB Federated Query deployment:
- For quickstart
- For production environment: YDB | Connector
- Contribution guide
- Type mapping table
Directories
¶
| Path | Synopsis |
|---|---|
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api
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client
Package client contains code of a simple CLI application that can be used for server debugging.
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Package client contains code of a simple CLI application that can be used for server debugging. |
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server
Package server contains the code base of Connector GRPC service - the component of YDB's Federated Query system providing the unified interface to the external data sources.
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Package server contains the code base of Connector GRPC service - the component of YDB's Federated Query system providing the unified interface to the external data sources. |
|
server/datasource
Package datasource describes the interface that must be satisfied by any external data source accessible through the connector.
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Package datasource describes the interface that must be satisfied by any external data source accessible through the connector. |
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server/datasource/rdbms
Package rdbms contains generalized abstractions suitable for use with any relational database.
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Package rdbms contains generalized abstractions suitable for use with any relational database. |
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server/datasource/rdbms/clickhouse
Package clickhouse contains code specific for ClickHouse database.
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Package clickhouse contains code specific for ClickHouse database. |
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server/datasource/rdbms/postgresql
Package postgresql contains code specific for PostgreSQL database.
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Package postgresql contains code specific for PostgreSQL database. |
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server/datasource/rdbms/utils
Package utils contains helper types and functions that can be used by any relational data source.
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Package utils contains helper types and functions that can be used by any relational data source. |
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server/datasource/rdbms/ydb
Package ydb contains code specific for YDB database.
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Package ydb contains code specific for YDB database. |
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server/datasource/s3
Package s3 contains the implementation of S3 (Simple Storage Service) based data source
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Package s3 contains the implementation of S3 (Simple Storage Service) based data source |
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server/paging
Package paging contains logic of splitting incoming data stream into the separate pages or blocks.
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Package paging contains logic of splitting incoming data stream into the separate pages or blocks. |
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server/streaming
Package streaming contains the logic of converting the data stream coming from the data source into the data stream sent over the network to the client.
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Package streaming contains the logic of converting the data stream coming from the data source into the data stream sent over the network to the client. |
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server/utils
Package utils contains various helpers and utility functions
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Package utils contains various helpers and utility functions |
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library
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go/core/metrics
Package metrics provides interface collecting performance metrics.
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Package metrics provides interface collecting performance metrics. |
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go/core/metrics/collect
dashboard generator for these metrics can be found at: a.yandex-team.ru/arcadia/library/go/yandex/monitoring-dashboards
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dashboard generator for these metrics can be found at: a.yandex-team.ru/arcadia/library/go/yandex/monitoring-dashboards |
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go/core/xerrors
package xerrors is a drop in replacement for errors and golang.org/x/xerrors packages and functionally for github.com/pkg/errors.
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package xerrors is a drop in replacement for errors and golang.org/x/xerrors packages and functionally for github.com/pkg/errors. |
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go/test/yatest
Package yatest provides access to testing context, when running under ya make -t.
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Package yatest provides access to testing context, when running under ya make -t. |
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tests
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tools
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