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‎docs/pages/product/configuration/data-sources/duckdb.mdx‎

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## Environment Variables
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| Environment Variable | Description | Possible Values | Required |
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| --------------------------------------- | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- | :------: |
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| `CUBEJS_DB_DUCKDB_MEMORY_LIMIT` | The maximum memory limit for DuckDB. Equivalent to `SET memory_limit=<MEMORY_LIMIT>`. Default is 75% of available RAM | A valid memory limit | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_SCHEMA` | The [default search schema][link-duckdb-configuration-ref] | A valid schema name | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_MOTHERDUCK_TOKEN` | The service token to use for connections to MotherDuck | A valid [MotherDuck service token][motherduck-docs-svc-token] | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_DATABASE_PATH` | The database filepath to use for connection to a local database. | A valid duckdb database file path | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_S3_ACCESS_KEY_ID` | The Access Key ID to use for database connections | A valid Access Key ID | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_S3_SECRET_ACCESS_KEY` | The Secret Access Key to use for database connections | A valid Secret Access Key | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_S3_ENDPOINT` | The S3 endpoint | A valid [S3 endpoint][duckdb-docs-s3-import] | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_S3_REGION` | The [region of the bucket][duckdb-docs-s3-import] | A valid AWS region | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_S3_USE_SSL` | Use SSL for connection | A boolean | ❌ | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_URL_STYLE` | To choose the S3 URL style(vhost or path) | 'vhost' or 'path' | ❌ | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_SESSION_TOKEN` | The token for the S3 session | A valid Session Token | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_EXTENSIONS` | A comma-separated list of DuckDB extensions to install and load | A comma-separated list of DuckDB extensions | ❌ | ✅ |
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| `CUBEJS_DB_DUCKDB_COMMUNITY_EXTENSIONS` | A comma-separated list of DuckDB community extensions to install and load | A comma-separated list of DuckDB community extensions | ❌ | ✅ |
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| `CUBEJS_CONCURRENCY` | The number of [concurrent queries][ref-data-source-concurrency] to the data source | A valid number | ❌ |
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| Environment Variable | Description | Possible Values | Required |
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|--------------------------------------------|-----------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------|:--------:|
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| `CUBEJS_DB_DUCKDB_MEMORY_LIMIT` | The maximum memory limit for DuckDB. Equivalent to `SET memory_limit=<MEMORY_LIMIT>`. Default is 75% of available RAM | A valid memory limit | ❌ |
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| `CUBEJS_DB_DUCKDB_SCHEMA` | The [default search schema][link-duckdb-configuration-ref] | A valid schema name | ❌ |
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| `CUBEJS_DB_DUCKDB_MOTHERDUCK_TOKEN` | The service token to use for connections to MotherDuck | A valid [MotherDuck service token][motherduck-docs-svc-token] | ❌ |
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| `CUBEJS_DB_DUCKDB_DATABASE_PATH` | The database filepath to use for connection to a local database. | A valid duckdb database file path | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_ACCESS_KEY_ID` | The Access Key ID to use for database connections | A valid Access Key ID | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_SECRET_ACCESS_KEY` | The Secret Access Key to use for database connections | A valid Secret Access Key | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_ENDPOINT` | The S3 endpoint | A valid [S3 endpoint][duckdb-docs-s3-import] | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_REGION` | The [region of the bucket][duckdb-docs-s3-import] | A valid AWS region | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_USE_SSL` | Use SSL for connection | A boolean | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_URL_STYLE` | To choose the S3 URL style(vhost or path) | `vhost` or `path` | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_SESSION_TOKEN` | The token for the S3 session | A valid Session Token | ❌ |
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| `CUBEJS_DB_DUCKDB_EXTENSIONS` | A comma-separated list of DuckDB extensions to install and load | A comma-separated list of DuckDB extensions | ❌ |
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| `CUBEJS_DB_DUCKDB_COMMUNITY_EXTENSIONS` | A comma-separated list of DuckDB community extensions to install and load | A comma-separated list of DuckDB community extensions | ❌ |
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| `CUBEJS_DB_DUCKDB_S3_USE_CREDENTIAL_CHAIN` | A flag to use credentials chain for secrets for S3 connections | `true`, `false`. Defaults to `false` | ❌ |
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| `CUBEJS_CONCURRENCY` | The number of [concurrent queries][ref-data-source-concurrency] to the data source | A valid number | ❌ |
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[ref-data-source-concurrency]: /product/configuration/concurrency#data-source-concurrency
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‎docs/pages/product/configuration/reference/environment-variables.mdx‎

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| ----------------------------------------------------- | ---------------------- | --------------------- |
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| A comma-separated list of DuckDB community extensions | N/A | N/A |
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## `CUBEJS_DB_DUCKDB_S3_USE_CREDENTIAL_CHAIN`
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A flag to use credentials chain for secrets for S3 connections.
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| Possible Values | Default in Development | Default in Production |
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| ----------------------------------------------------- | ---------------------- | --------------------- |
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| `true`, `false` | `false` | `false` |
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## `CUBEJS_DB_ELASTIC_APIKEY_ID`
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The [ID of the API key from elastic.co][elastic-docs-api-keys]. Required when

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