duckdb_fdw

pig build pkg duckdb_fdw         # 构建 RPM / DEB 包

pig repo add pgsql -u          # 添加仓库并更新缓存

CREATE EXTENSION duckdb_fdw;

-- 创建扩展
CREATE EXTENSION duckdb_fdw;

-- 创建 duckdb_fdw 外部服务器
CREATE SERVER duckdb_server FOREIGN DATA WRAPPER duckdb_fdw OPTIONS (database '/tmp/duck.db');

-- 创建用户映射 [可选]
-- GRANT USAGE ON FOREIGN SERVER duckdb_server TO PUBLIC;

SELECT duckdb_fdw_version();

-- 可以使用 `duckdb_execute` 执行 duckdb 命令，例如在 duckdb 中创建一张表：
-- 在 duckdb 中创建表
SELECT duckdb_execute('duckdb_server', 'CREATE TABLE t1 (a integer,b varchar);');

-- 创建映射到 duckdb 表的外部表
CREATE FOREIGN TABLE t1 (
    a integer,
    b text
) SERVER duckdb_server OPTIONS (
    table 't1'
);

-- 写入数据并读取
INSERT INTO t1 SELECT i AS a,i::text AS b FROM generate_series(1,10) i;
SELECT * FROM t1;

duckdb /tmp/duck.db

CREATE TABLE t1 (
  a integer,
  b text
);

INSERT INTO t1 VALUES (1, 'a'), (2 , 'b'), (3, 'c');
SELECT * FROM t1;

IMPORT FOREIGN SCHEMA public FROM SERVER duckdb_server INTO public;