# Arrow without ADBC · access · 2019

Revision 1 (11 October 2026) · Modeled snapshot · through 8 October 2026.

All figures are research-informed estimates of analytical activity. Significant errors may remain; decimal places do not imply measurement precision.

0.11% of the full access layer.

[Arrow without ADBC](https://history.columnar.tech/technologies/access/arrow.md): historical names and annual shares.

Direct use of engine-served Arrow results through an Arrow API, Arrow over HTTP, Flight/Flight SQL, or an embedded Arrow interface. Client-side conversion of ODBC or other row results does not qualify. ADBC use is counted separately.

Direct Arrow and ADBC are exclusive boxes. Together they form an Arrow family of 0.1% of access.

## Contributions by compute engine

Each figure is a share of the full access layer.

| Engine | Share of full access layer | Engine connections |
| --- | --- | --- |
| [Snowflake](https://history.columnar.tech/technologies/compute/snowflake.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2019/compute/snowflake.md) |
| [Google BigQuery](https://history.columnar.tech/technologies/compute/bigquery.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2019/compute/bigquery.md) |
| [Apache Arrow DataFusion](https://history.columnar.tech/technologies/compute/datafusion.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2019/compute/datafusion.md) |

[All percentages for 2019](https://history.columnar.tech/years/2019.md)

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[Markdown overview](https://history.columnar.tech/index.md) · [Interactive visualization](https://history.columnar.tech/?2019) · [Methodology](https://history.columnar.tech/methodology.md) · [Terms of use](https://history.columnar.tech/terms.md)

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