Results of 1 - 10 of about 12 for Closing (0.002 sec.)
- Connect 13796
- Overview The Go client works through the standard database/sql types: a *sql.DB is a pool of connections to a DuckDB database. This page covers opening in-memory and file-backed databases, passing DuckDB configuration options, running initi
...alization steps with a Connector , the client's thread-safety and connection-lifetime rules, and closing a database cleanly. Opening a Database sql.Open() takes the driver name duckdb and a data source name (DSN) . An empty DSN...nnection. When code closes a connection, database/sql may return it to the pool as an idle connection rather than actually closing it, so a temporary table can outlive the code that created it. To make closing a connection tear it down, disable idle con...nections: db.SetMaxIdleConns(0) Closing a Database DuckDB runs in the same process as the Go application, so all of its memory is held by that process. Closing th... - https://man.mtool.work/duckdb/2.0/clients/go/connecting.html
- Connect 10506
- Overview Every DuckDB feature reachable from Rust starts with a Connection . Opening in-memory and file-backed databases, configuring a database instance with Config , opening read-only, pooling connections across threads, the crate's threa
...d-safety guarantees, and closing a connection are all covered below. Opening a Connection A Connection is created with Connection::open_in_memory() for an...r::file_with_flags() and memory_with_flags() accept a Config . Enable the feature in Cargo.toml with features = ["r2d2"] . Closing a Connection A Connection closes automatically when it is dropped (goes out of scope), which shuts down the underlying dat...rr)) => eprintln!("failed to close connection: {err}"), } close() returns the connection back to the caller on failure, so closing can be retried. In the typical case there is little difference between an explicit close() and letting the connection drop... - https://man.mtool.work/duckdb/2.0/clients/rust/connecting.html
- Connect 10188
- Overview Every DuckDB feature reachable from Java starts with a Connection . This page covers the JDBC URL forms the driver accepts, how DuckDB and driver options are passed and which of them win, how connections come to share (or not share
...all threads value. For server setup, authentication and other ways to query a remote server, see the Quack documentation . Closing Connections DuckDB shuts down a database when its last open connection is closed. Closing the final connection checkpoints...tabase has been closed with Connection.close() before the Java program ends. There is no separate shutdown method to call: closing all connections is sufficient. Use a try-with-resources block so that connections are closed even when an exception is thr...anager.getConnection("jdbc:duckdb:/tmp/my_database")) { // work with the connection } If the process is terminated without closing its connections, the write-ahead log is left in place. It is replayed the next time the database file is opened, so no com... - https://man.mtool.work/duckdb/2.0/clients/java/connecting.html
- Directly Read DuckDB Databases 8702
- DuckDB allows directly reading DuckDB files through the read_duckdb function: read_duckdb(⟨'path_to_database'⟩, table_name = ⟨'table_to_read'⟩); Using this function is equivalent to performing the following steps: Attaching to the database
...using a read-only connection. Querying the table specified through the table_name argument. Closing the connection to the database. Examples Reading a Specific Table To read the region table from the TPC-H dataset, run: SE... - https://man.mtool.work/duckdb/2.0/guides/file_formats/read_duckdb.html
- Run Queries 8207
- Overview DuckDB-Wasm provides functions for querying data. Queries are run sequentially: First, create a connection by calling connect . Then, run queries by calling query to materialize the whole result, or send to fetch result chunks lazi
...for await (const batch of await stmt.send(234)) { // ... } // Close the statement to release memory await stmt.close(); // Closing the connection releases its statements as well await conn.close(); Arrow Table to JSON Query results are returned as Arrow... - https://man.mtool.work/duckdb/2.0/clients/wasm/query.html
- UI Extension 8207
- The ui extension adds a user interface for your local DuckDB instance. Usage To start the UI from the command line: duckdb -ui To start the UI from SQL: CALL start_ui(); Running either of these will open the UI in your default browser. The
...is a native process (not Wasm), it can leverage all the resources of your local environment: all cores, memory and files. Closing this instance will cause the UI to stop working. The UI is served from an HTTP server embedded in DuckDB. To start this se... - https://man.mtool.work/duckdb/2.0/core_extensions/ui.html
- Import Data 8030
- Overview The Go client offers two ways to load data into DuckDB in bulk: the high-performance Appender for inserting rows generated in Go, and reading directly from data files such as Parquet, CSV, and JSON. Both are described below. For in
...l(err) } if err := a.AppendRow("Fred", int32(34)); err != nil { log.Fatal(err) } // Close flushes any buffered rows before closing the appender. if err := a.Close(); err != nil { log.Fatal(err) } var ( name string age int ) row := db.QueryRowContext(con... - https://man.mtool.work/duckdb/2.0/clients/go/data_import.html
- Import Data 7871
- Overview DuckDB-Wasm has multiple ways to import data, depending on the format of the data. Importing happens in two steps. The data file is registered in a virtual file system using one of the register functions ( registerFileBuffer , regi
...s below all use a connection named conn , opened from the db object created when you instantiate DuckDB-Wasm . Opening and Closing a Connection Every insert and query runs on a connection. Open one with connect() , and close it when you are done to rele... - https://man.mtool.work/duckdb/2.0/clients/wasm/data_ingestion.html
- Python DB API 7711
- The standard DuckDB Python API provides a SQL interface compliant with the DB-API 2.0 specification described by PEP 249 similar to the SQLite Python API . Connection To use the module, you must first create a DuckDBPyConnection object that
...om another thread while it is busy raises a ResourceInUseException instead of waiting, so give each thread its own cursor. Closing a connection closes its cursors. See About cursor() for details. Connections are closed implicitly when they go out of sco... - https://man.mtool.work/duckdb/2.0/clients/python/dbapi.html
- Python API 7711
- Installation To use the DuckDB Python client, visit the Python installation page . The latest stable version of the DuckDB Python client is 2.0.0. Installation The DuckDB Python API can be installed using pip : pip install duckdb . Please s
...n parallel. A global setting, such as threads or memory_limit , applies to the whole database, also when a cursor sets it. Closing a connection closes its cursors. Code that runs inside a query, such as a Python function called from SQL, cannot use the... - https://man.mtool.work/duckdb/2.0/clients/python/overview.html
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