{
	"about": {
		"trial": false,
		"author": {
			"name": "EMQ",
			"email": "contact@emqx.io",
			"company": "EMQ Technologies Co., Ltd",
			"website": "https://www.emqx.io"
		},
		"helpUrl": {
          "en_US": "https://ekuiper.org/docs/en/latest/sqls/custom_functions.html",
          "zh_CN": "https://ekuiper.org/docs/zh/latest/sqls/custom_functions.html"
        },
		"description": {
			"en_US": "",
			"zh_CN": ""
		}
	},
	"name": "echo",
	"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。"
		},
		"args": [
			{
				"name": "field",
				"optional": false,
				"control": "field",
				"type": "string",
				"hint": {
					"en_US": "The field to echo.",
					"zh_CN": "字段名"
				},
				"label": {
					"en_US": "Field",
					"zh_CN": "字段"
				}
			}
		],
		"return": {
			"type": "string",
			"hint": {
				"en_US": "Echoed string",
				"zh_CN": "回声值"
			}
		},
		"node": {
			"category": "function",
			"icon": "iconPath",
			"label": {
				"en_US": "Echo",
				"zh_CN": "回声"
			}
		}
	}]
}