{ "about": { "trial": false, "author": { "name": "EMQ", "email": "contact@emqx.io", "company": "EMQ Technologies Co., Ltd", "website": "https://www.emqx.io" }, "helpUrl": { "en_US": "https://github.com/lf-edge/ekuiper/blob/master/docs/en_US/sqls/custom_functions.md", "zh_CN": "https://github.com/lf-edge/ekuiper/blob/master/docs/zh_CN/sqls/custom_functions.md" }, "description": { "en_US": "", "zh_CN": "" } }, "functions": [{ "name": "echo", "example": "echo(col1)", "hint": { "en_US": "The parameter value is output as it is.", "zh_CN": "原样输出参数值。" } }] }