MySQL 的 vsql_duckdb 扩展

INSTALL EXTENSION vsql_duckdb;

SELECT EXTENSION_NAME
FROM INFORMATION_SCHEMA.EXTENSIONS
WHERE EXTENSION_NAME = 'vsql_duckdb';

+----------------+
| EXTENSION_NAME |
+----------------+
| vsql_duckdb    |
+----------------+

+----------------------------+-------+
| Variable_name              | Value |
+----------------------------+-------+
| vsql_duckdb.queries_failed | 0     |
| vsql_duckdb.queries_total  | 0     |
+----------------------------+-------+

SELECT duckdb_status() AS status\G

*************************** 1. row ***************************
status: {
  "duckdb_version": "v1.5.5",
  "readers": ["core_functions", "httpfs", "json", "parquet"],
  "engine_error": "",
  "object_storage_credential": "not configured",
  "s3_endpoint": "",
  "s3_region": "",
  "s3_url_style": "vhost",
  "s3_use_ssl": true,
  "enable_external_access": true,
  "allow_local_files": false,
  "memory_limit_mb": 1024,
  "threads": 2,
  "timeout_ms": 30000,
  "max_result_bytes": 1048576
}

SELECT duckdb_scalar('SELECT 6 * 7') AS answer;

+--------+
| answer |
+--------+
| 42     |
+--------+

SET GLOBAL vsql_duckdb.allow_local_files = ON;

SELECT duckdb_query(
    'SELECT sku, units * unit_price AS total
     FROM read_csv_auto(''/path/to/sales.csv'')
     ORDER BY total DESC') AS rows_json\G

*************************** 1. row ***************************
rows_json: [{"sku":"A-100","total":59.97},{"sku":"A-101","total":24.5},{"sku":"A-102","total":21.7}]

SET GLOBAL vsql_duckdb.allow_local_files = OFF;