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57b77bca09
Adds optional `queryExecMode` to postgres source config, allowing users to set pgx `DefaultQueryExecMode` for compatibility with external connection poolers (e.g. transaction pooling). Supported values: - cache_statement (default) - cache_describe - describe_exec - exec - simple_protocol Implementation details: - parse DSN with `pgxpool.ParseConfig` - map `queryExecMode` to `pgx.QueryExecMode*` - create pool via `pgxpool.NewWithConfig` - validate config using `oneof` tag - document new field in postgres source docs - add parser/validation tests Tests run: `go test -v ./internal/sources/postgres -count=1 -vet=off` Refs #2385 --------- Co-authored-by: Molt (OpenClaw) <noreply@users.noreply.github.com> Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> Co-authored-by: Yuan Teoh <yuanteoh@google.com>
137 lines
5.6 KiB
Markdown
137 lines
5.6 KiB
Markdown
---
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title: "PostgreSQL"
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type: docs
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weight: 1
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description: >
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PostgreSQL is a powerful, open source object-relational database.
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---
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## About
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[PostgreSQL][pg-docs] is a powerful, open source object-relational database
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system with over 35 years of active development that has earned it a strong
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reputation for reliability, feature robustness, and performance.
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[pg-docs]: https://www.postgresql.org/
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## Available Tools
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- [`postgres-sql`](../tools/postgres/postgres-sql.md)
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Execute SQL queries as prepared statements in PostgreSQL.
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- [`postgres-execute-sql`](../tools/postgres/postgres-execute-sql.md)
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Run parameterized SQL statements in PostgreSQL.
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- [`postgres-list-tables`](../tools/postgres/postgres-list-tables.md)
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List tables in a PostgreSQL database.
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- [`postgres-list-active-queries`](../tools/postgres/postgres-list-active-queries.md)
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List active queries in a PostgreSQL database.
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- [`postgres-list-available-extensions`](../tools/postgres/postgres-list-available-extensions.md)
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List available extensions for installation in a PostgreSQL database.
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- [`postgres-list-installed-extensions`](../tools/postgres/postgres-list-installed-extensions.md)
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List installed extensions in a PostgreSQL database.
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- [`postgres-list-views`](../tools/postgres/postgres-list-views.md)
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List views in a PostgreSQL database.
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- [`postgres-list-schemas`](../tools/postgres/postgres-list-views.md)
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List schemas in a PostgreSQL database.
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- [`postgres-database-overview`](../tools/postgres/postgres-database-overview.md)
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Fetches the current state of the PostgreSQL server.
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- [`postgres-list-triggers`](../tools/postgres/postgres-list-triggers.md)
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List triggers in a PostgreSQL database.
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- [`postgres-list-indexes`](../tools/postgres/postgres-list-indexes.md)
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List available user indexes in a PostgreSQL database.
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- [`postgres-list-sequences`](../tools/postgres/postgres-list-sequences.md)
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List sequences in a PostgreSQL database.
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- [`postgres-long-running-transactions`](../tools/postgres/postgres-long-running-transactions.md)
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List long running transactions in a PostgreSQL database.
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- [`postgres-list-locks`](../tools/postgres/postgres-list-locks.md)
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List lock stats in a PostgreSQL database.
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- [`postgres-replication-stats`](../tools/postgres/postgres-replication-stats.md)
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List replication stats in a PostgreSQL database.
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- [`postgres-list-query-stats`](../tools/postgres/postgres-list-query-stats.md)
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List query statistics in a PostgreSQL database.
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- [`postgres-get-column-cardinality`](../tools/postgres/postgres-get-column-cardinality.md)
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List cardinality of columns in a table in a PostgreSQL database.
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- [`postgres-list-table-stats`](../tools/postgres/postgres-list-table-stats.md)
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List statistics of a table in a PostgreSQL database.
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- [`postgres-list-publication-tables`](../tools/postgres/postgres-list-publication-tables.md)
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List publication tables in a PostgreSQL database.
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- [`postgres-list-tablespaces`](../tools/postgres/postgres-list-tablespaces.md)
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List tablespaces in a PostgreSQL database.
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- [`postgres-list-pg-settings`](../tools/postgres/postgres-list-pg-settings.md)
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List configuration parameters for the PostgreSQL server.
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- [`postgres-list-database-stats`](../tools/postgres/postgres-list-database-stats.md)
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Lists the key performance and activity statistics for each database in the postgreSQL
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server.
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- [`postgres-list-roles`](../tools/postgres/postgres-list-roles.md)
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Lists all the user-created roles in PostgreSQL database.
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- [`postgres-list-stored-procedure`](../tools/postgres/postgres-list-stored-procedure.md)
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Lists all the stored procedure in PostgreSQL database.
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### Pre-built Configurations
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- [PostgreSQL using MCP](https://googleapis.github.io/genai-toolbox/how-to/connect-ide/postgres_mcp/)
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Connect your IDE to PostgreSQL using Toolbox.
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## Requirements
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### Database User
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This source only uses standard authentication. You will need to [create a
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PostgreSQL user][pg-users] to login to the database with.
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[pg-users]: https://www.postgresql.org/docs/current/sql-createuser.html
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## Example
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```yaml
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kind: sources
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name: my-pg-source
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type: postgres
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host: 127.0.0.1
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port: 5432
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database: my_db
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user: ${USER_NAME}
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password: ${PASSWORD}
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```
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{{< notice tip >}}
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Use environment variable replacement with the format ${ENV_NAME}
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instead of hardcoding your secrets into the configuration file.
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{{< /notice >}}
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## Reference
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| **field** | **type** | **required** | **description** |
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|-------------|:------------------:|:------------:|------------------------------------------------------------------------|
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| type | string | true | Must be "postgres". |
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| host | string | true | IP address to connect to (e.g. "127.0.0.1") |
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| port | string | true | Port to connect to (e.g. "5432") |
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| database | string | true | Name of the Postgres database to connect to (e.g. "my_db"). |
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| user | string | true | Name of the Postgres user to connect as (e.g. "my-pg-user"). |
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| password | string | true | Password of the Postgres user (e.g. "my-password"). |
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| queryParams | map[string]string | false | Raw query to be added to the db connection string. |
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| queryExecMode | string | false | pgx query execution mode. Valid values: `cache_statement` (default), `cache_describe`, `describe_exec`, `exec`, `simple_protocol`. Useful with connection poolers that don't support prepared statement caching. |
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