# ADBC · access · 2026

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.

2.06% of the full access layer.

[ADBC](https://history.columnar.tech/technologies/access/adbc.md): historical names and annual shares.

## Management within ADBC

Unmanaged means customer-managed; managed means vendor-managed access. These are subdivisions of the parent, with no separate engine connections.

| Subdivision | Share of parent | Share of full access layer |
| --- | --- | --- |
| Unmanaged | 100% | 2.06% |
| Managed | 0% | 0% |

Direct Arrow and ADBC are exclusive boxes. Together they form an Arrow family of 6% 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) | 0.7% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/snowflake.md) |
| [Databricks](https://history.columnar.tech/technologies/compute/databricks.md) | 0.6% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/databricks.md) |
| [Google BigQuery](https://history.columnar.tech/technologies/compute/bigquery.md) | 0.4% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/bigquery.md) |
| [DuckDB](https://history.columnar.tech/technologies/compute/duckdb.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/duckdb.md) |
| [Amazon Redshift](https://history.columnar.tech/technologies/compute/redshift.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/redshift.md) |
| [Apache Spark (including Amazon EMR, Synapse Spark, and Google Cloud Dataproc)](https://history.columnar.tech/technologies/compute/spark.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/spark.md) |
| [Dremio](https://history.columnar.tech/technologies/compute/dremio.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/dremio.md) |
| [PostgreSQL family](https://history.columnar.tech/technologies/compute/postgres.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/postgres.md) |
| [Trino](https://history.columnar.tech/technologies/compute/trino.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/trino.md) |
| [SQL Server / Synapse / Fabric WH](https://history.columnar.tech/technologies/compute/sqlserver.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/sqlserver.md) |
| [ClickHouse](https://history.columnar.tech/technologies/compute/clickhouse.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/clickhouse.md) |
| [Hadoop batch/Hive](https://history.columnar.tech/technologies/compute/hadoop.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/hadoop.md) |
| [Presto](https://history.columnar.tech/technologies/compute/presto.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/presto.md) |
| [Apache Doris](https://history.columnar.tech/technologies/compute/doris.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/doris.md) |
| [Apache DataFusion](https://history.columnar.tech/technologies/compute/datafusion.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/datafusion.md) |
| [MySQL/MariaDB](https://history.columnar.tech/technologies/compute/mysql.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/mysql.md) |
| [SQLite](https://history.columnar.tech/technologies/compute/sqlite.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/sqlite.md) |
| [SAP HANA](https://history.columnar.tech/technologies/compute/hana.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/hana.md) |
| [SingleStore](https://history.columnar.tech/technologies/compute/singlestore.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/singlestore.md) |
| [StarRocks](https://history.columnar.tech/technologies/compute/starrocks.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/starrocks.md) |
| [Other analytical engines](https://history.columnar.tech/technologies/compute/other-analytics.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/other-analytics.md) |
| [Oracle](https://history.columnar.tech/technologies/compute/oracle.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/oracle.md) |
| [IBM relational (SQL/DS/Db2 lineage)](https://history.columnar.tech/technologies/compute/ibm.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/ibm.md) |
| [Teradata](https://history.columnar.tech/technologies/compute/teradata.md) | <0.1% | [Inspect engine](https://history.columnar.tech/connections/2026/compute/teradata.md) |

[All percentages for 2026](https://history.columnar.tech/years/2026.md)

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