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CHECKPOINT Statement – DuckDB 12735
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... rther behavior modification. Reclaiming Space When performing a checkpoint (automatic or otherwise), the space occupied by deleted rows is partially reclaimed. Note that this does not remove all deleted rows, but rather merges row groups that have a sig ... nificant amount of deletes together. In the current implementation this requires ~25% of rows to be deleted in adjacent row groups. When running in in-memory mode, checkpointing has no effect, hence it does not reclaim space after ...
https://man.mtool.work/duckdb/1.3/sql/statements/checkpoint.html
DELETE Statement – DuckDB 12735
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... removes rows from the table identified by the table-name. If the WHERE clause is not present, all records in the table are deleted. If a WHERE clause is supplied, then only those rows for which the WHERE clause results in true are deleted. Rows for whic ... as an alias for DELETE FROM without a WHERE clause: TRUNCATE tbl ; Limitations on Reclaiming Memory and Disk Space Running DELETE does not mean space is reclaimed. In general, rows are only marked as deleted. DuckDB reclaims space upon performing a CHEC ...
https://man.mtool.work/duckdb/1.3/sql/statements/delete.html
CREATE MACRO Statement – DuckDB 8755
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... a table of arbitrary size and shape. If a MACRO is temporary, it is only usable within the same database connection and is deleted when the connection is closed. Examples Scalar Macros Create a macro that adds two expressions ( a and b ): CREATE MACRO a ... ble macro that returns multiple rows. It will be replaced if it already exists, and it is temporary (will be automatically deleted when the connection ends): CREATE OR REPLACE TEMP MACRO dynamic_table ( col1_value , col2_value ) AS TABLE SELECT col1_val ...
https://man.mtool.work/duckdb/1.3/sql/statements/create_macro.html
Vector Similarity Search Extension – DuckDB 8543
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... better use of parallelism on large tables. Deletes are not immediately reflected in the index, but are instead “marked” as deleted, which can cause the index to grow stale over time and negatively impact query quality and performance. To remedy the last ... can call the PRAGMA hnsw_compact_index ( ' index_name ' ) pragma function to trigger a re-compaction of the index pruning deleted items, or re-create the index after a significant number of updates. Bonus: Vector Similarity Search Joins The vss extensi ...
https://man.mtool.work/duckdb/1.3/core_extensions/vss.html
Files Created by DuckDB – DuckDB 8118
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... eated in on-disk mode. weather.tmp/ database_filename .wal Write-ahead log file. If DuckDB exits normally, the WAL file is deleted upon exit. If DuckDB crashes, the WAL file is required to recover data. weather.wal If you are working in a Git repository ...
https://man.mtool.work/duckdb/1.3/operations_manual/footprint_of_duckdb/files_cr...
Secrets Manager – DuckDB 7906
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... e of the home_directory configuration option has no effect on the location of the secrets. Deleting Secrets Secrets can be deleted using the DROP SECRET statement , e.g.: DROP PERSISTENT SECRET my_persistent_secret ; Creating Multiple Secrets for the Sa ...
https://man.mtool.work/duckdb/1.3/configuration/secrets_manager.html
DuckLake – DuckDB 7906
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... uivalent to that of the table table_name . ducklake_table_deletions The ducklake_table_deletions function returns the rows deleted from a given table between snapshots of given versions or timestamps. The function has two variants, depending on whether ...
https://man.mtool.work/duckdb/1.3/core_extensions/ducklake.html
Iceberg Extension – DuckDB 7906
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... c15-17b241171b16-00001.parquet PARQUET 51793 lineitem_iceberg/metadata/10eaca8a-1e1c-421e-ad6d-b232e5ee23d3-m0.avro 2 DATA DELETED EXISTING lineitem_iceberg/data/00000-411-0792dcfe-4e25-4ca3-8ada-175286069a47-00001.parquet PARQUET 60175 Visualizing Snap ...
https://man.mtool.work/duckdb/1.3/core_extensions/iceberg/overview.html
Indexes – DuckDB 7906
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... is an UPDATE on the corresponding PRIMARY KEY table, which DuckDB rewrites into a DELETE followed by an INSERT . The to-be-deleted row exists in the foreign key table. If these hold, you'll encounter an unexpected constraint violation: CREATE TABLE pk_t ...
https://man.mtool.work/duckdb/1.3/sql/indexes.html
ALTER TABLE Statement – DuckDB 7906
This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... COMMENT ON COPY CREATE INDEX CREATE MACRO CREATE SCHEMA CREATE SECRET CREATE SEQUENCE CREATE TABLE CREATE VIEW CREATE TYPE DELETE DESCRIBE DROP EXPORT and IMPORT DATABASE INSERT LOAD / INSTALL PIVOT Profiling SELECT SET / RESET SET VARIABLE SUMMARIZE Tr ... itations ALTER COLUMN fails if values of conflicting types have occurred in the table at any point, even if they have been deleted: CREATE TABLE tbl ( col VARCHAR ); INSERT INTO tbl VALUES ( 'asdf' ), ( '42' ); DELETE FROM tbl WHERE col = 'asdf' ; ALTER ...
https://man.mtool.work/duckdb/1.3/sql/statements/alter_table.html
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