importduckdbfromduckdbimportDuckDBPyConnectionDB_URL="postgresql://postgres:<user>@:<port>/<database_name>"defconnect_duckdb_supabase()->DuckDBPyConnection:con=duckdb.connect()con.execute("INSTALL postgres_scanner")con.execute("LOAD postgres_scanner")con.execute(f"CALL postgres_attach('{DB_URL}'...
-- scan the table "mytable" from the schema "public" in the database "mydb" SELECT * FROM postgres_scan('host=localhost port=5432 dbname=mydb', 'public', 'mytable'); “postgres_scan” 函数的第一个参数是 [PostgreSQL 连接字符串](postgresql.org/docs/cur),这是以 “{key}={value}” ...
Postgres Scanner SQLite Scanner python3-c "import duckdb; duckdb.query('INSTALL httpfs;');" Loading an extensionfromlocalstorage 参考https://duckdb.org/docs/extensions/overview https://towardsdatascience.com/a-serverless-query-engine-from-spare-parts-bd6320f10353 thereisa very big differencebetweena...
-- Attach the Postgres database using the given connection string ATTACH 'host=localhost port=5432 dbname=mydb' AS test (TYPE postgres); -- The table "tbl_name" can now be queried as if it is a regular table SELECT * FROM test.tbl_name; -- Switch the active database to "test" US...
Querying SQLite data from DuckDBduckdb>LOAD'build/release/sqlite_scanner.duckdb_extension';duckdb>CALL sqlite_attach('sqlite3.db');duckdb>LOAD'build/release/postgres_scanner.duckdb_extension';duckdb>CALL POSTGRES_ATTACH('host=127.0.0.1 port=5432 user=postgres dbname=postgres'); ...
DuckDB可以通过postgres_scanner插件来访问PostgreSQL。DuckDB的PostgresSQL的扫描扩展插件,可以在PostgreSQL运行的情况下,不copy数据,即数据不在DuckDB落地,就可以进行复杂的OLAP的sql查询,并且性能还比PostgreSQL本身运行的要快。 22 TPC-H benchmark queries was run 5 times, and we report the median run time in ...
DuckDB SQL Parser 源自 Postgres SQL Parser。 2).Logical Planner 包含了两个过程 binder、plan generator。前者是解析所有引用的 schema 中的对象(如 table 或 view)的表达式,将其与列名和类型匹配。后者将 binder 生成的 AST 转换为由基本 logical query 查询运算符组成的树,就得到了一颗 type-resolved logical...
1. Install PostgreSQL Scanner Extension Use the INSTALL postgres_scanner; and LOAD postgres_scanner; commands to enable PostgreSQL connections. 2. Connect to PostgreSQL and Query Data Using postgres_scan, you can define the connection string, schema, and table name. This method retrieves data direc...
Reading Data from Postgres To make a Postgres database accessible to DuckDB use the ATTACH command: ATTACH 'dbname=postgresscanner' AS postgres_db (TYPE postgres); The ATTACH command takes as input a libpq connection string - which is a set of key=value pairs separated by spaces. Below are...
DuckDB SQL Parser 源自 Postgres SQL Parser。 2).Logical Planner 包含了两个过程 binder、plan generator。前者是解析所有引用的 schema 中的对象(如 table 或 view)的表达式,将其与列名和类型匹配。后者将 binder 生成的 AST 转换为由基本 logical query 查询运算符组成的树,就得到了一颗 type-resolved logical...