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- Transaction Management 11656
- DuckDB supports ACID database transactions . Transactions provide isolation, i.e., changes made by a transaction are not visible from concurrent transactions until it is committed. A transaction can also be aborted, which discards any chang
...he following statements for transaction management. Starting a Transaction To start a transaction, run: BEGIN TRANSACTION; Committing a Transaction You can commit a transaction to make it visible to other transactions and to write it to persistent storage... - https://man.mtool.work/duckdb/2.0/sql/statements/transactions.html
- CREATE INDEX Statement 11067
- CREATE INDEX The CREATE INDEX statement constructs an index on the specified column(s) of the specified table. Examples Create a unique index films_id_idx on the column id of table films : CREATE UNIQUE INDEX films_id_idx ON films (id); Cre
...s not have an “early exit” at the moment, instead, it will attempt to create the index and only check its existence before committing it to storage. Therefore, it may run for a longer time compared to other IF NOT EXISTS statements, which terminate early.... - https://man.mtool.work/duckdb/2.0/sql/statements/create_index.html
- Unity Catalog Extension 8126
- The unity_catalog extension attaches a Unity Catalog catalog, on Databricks or Unity Catalog OSS, as a DuckDB database. You can list, read, insert into and create its Delta Lake tables. It uses the delta extension to access the tables. For
...catalog-managed commits (Catalog-Coordinated Commits / CCv2), where Unity Catalog coordinates commits rather than writers committing directly to the Delta log. Since v1.5.2 (v1.5.5 for Unity Catalog OSS), DuckDB uses this protocol when the attached table... - https://man.mtool.work/duckdb/2.0/core_extensions/unity_catalog.html
- Metrics 8126
- DuckDB provides a set of metrics that can be used to monitor the performance and health of the database. Metrics are named ⟨group⟩.⟨metric⟩ , e.g., query.total_time or operator.timing . The set of collected metrics is controlled with the tr
...point_latency double seconds Time spent running checkpoints storage.commit_local_storage_latency double seconds Time spent committing the transaction-local storage storage.total_vacuum_time double seconds Total time spent running vacuum tasks during checkp... - https://man.mtool.work/duckdb/2.0/dev/metrics.html
- Configuration 6949
- DuckDB has a number of configuration options that can be used to change the behavior of the system. The configuration options can be set using either the SET statement or the PRAGMA statement . They can be reset to their original values usi
...such as tables. BOOLEAN false enable_optimistic_write Whether or not to optimistically write large appends to disk before committing. Disable this to keep bulk appends in memory, e.g., for in-memory benchmarks. BOOLEAN true enable_optimizer Whether the qu... - https://man.mtool.work/duckdb/2.0/configuration/overview.html
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