71 lines
2.1 KiB
Markdown
71 lines
2.1 KiB
Markdown
---
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title: Write to PostgreSQL
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list_title: PostgreSQL
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description: >
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Use [`sql.to()`](/flux/v0/stdlib/sql/to/) with the `postgres` driver to write
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data to PostgreSQL.
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menu:
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flux_v0:
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name: PostgreSQL
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parent: write-to-sql
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identifier: write-postgres
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weight: 101
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related:
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- /flux/v0/stdlib/sql/to/
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list_code_example: |
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```js
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import "sql"
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data
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|> sql.to(
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driverName: "postgres",
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dataSourceName: "postgresql://username:password@localhost:5432",
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table: "example_table"
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)
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```
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---
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To write data to [PostgreSQL](https://www.postgresql.org/) with Flux:
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1. Import the [`sql` package](/flux/v0/stdlib/sql/).
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2. Pipe-forward data into [`sql.to()`](/flux/v0/stdlib/sql/to/) and provide
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the following parameters:
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- **driverName**: postgres
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- **dataSourceName**: _See [data source name](#postgresql-data-source-name)_
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- **table**: Table to write to
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- **batchSize**: Number of parameters or columns that can be queued within
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each call to `Exec` (default is `10000`)
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```js
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import "sql"
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data
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|> sql.to(
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driverName: "postgres",
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dataSourceName: "postgresql://username:password@localhost:5432",
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table: "example_table",
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)
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```
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---
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## PostgreSQL data source name
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The `postgres` driver uses the following DSN syntax (also known as a **connection string**):
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```
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postgres://username:password@localhost:5432/dbname?param=value
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```
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## Flux to PostgreSQL data type conversion
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`sql.to()` converts Flux data types to PostgreSQL data types.
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| Flux data type | PostgreSQL data type |
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| :-------------------------------------------- | :------------------- |
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| [float](/flux/v0/data-types/basic/float/) | FLOAT |
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| [int](/flux/v0/data-types/basic/int/) | BIGINT |
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| [uint](/flux/v0/data-types/basic/uint/) | BIGINT |
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| [string](/flux/v0/data-types/basic/string/) | TEXT |
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| [bool](/flux/v0/data-types/basic/bool/) | BOOL |
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| [time](/flux/v0/data-types/basic/time/) | TIMESTAMP |
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