考虑以下示例语句。提供的path_elem为 NULL,因此 JSON_EXTRACT_PATH_TEXT 会返回 NULL,无论任何其他参数的值如何。 --Statement where path_elem is NULL and json_string is valid JSON.SELECTJSON_EXTRACT_PATH_TEXT('{"f2":{"f3":1},"f4":{"f5":99,"f6":"star"}}',NULL);json_extract_path_tex...
CompletableFuture 的底层实现是基于 Fork/Join 框架和 ConcurrentLinkedQueue ，在Java 8中， CompletableF...
问Postgres，函数"jsonb_extract_path_text“不提供任何结果EN一、竞品分析和功能分析是不同的，竞品分析...
选择JSON_EXTRACT_PATH_TEXT('{"topics": ["金融科技", "人工智能", "市场研究与消费者洞察"], "companies": [{"name": "TKO Group", "idCbiEntity": 1091583}, {"name": "All Elite Wrestling", "idCbiEntity": 1058641}, {"name": "新日本职业摔跤", "idCbiEntity": 276499}]}','公司',...
JSON_EXTRACT_PATH_TEXT 函数返回 JSON 字符串中的一系列路径元素引用的 key:value 对的值。JSON 路径最深可嵌套至 5 层。路径元素区分大小写。如果 JSON 字符串中不存在路径元素,JSON_EXTRACT_PATH_TEXT 将返回空字符串。如果 null_if_invalid 参数设置为 true 并且JSON 字符串无效,函数将返回 NULL 而不是返...
The JSON_EXTRACT_PATH_TEXT function returns the value for the key:value pair referenced by a series of path elements in a JSON string. The JSON path can be nested up to five levels deep. Path elements are case-sensitive. If a path element does not exist in the JSON string, JSON_EXTRAC...
Text-based JSON functions IS_VALID_JSON IS_VALID_JSON_ARRAY JSON_ARRAY_LENGTH JSON_EXTRACT_ARRAY_ELEMENT_TEXT JSON_EXTRACT_PATH_TEXT Machine learning functions Math functions Object functions Spatial functions String functions SUPER type information functions VARBYTE functions Window functions System admini...
selectjson_extract_path_text('{"f2":{"f3":1},"f4":{"f5":99,"f6":"star"}','f4','f6');An error occurredwhenexecuting theSQLcommand:selectjson_extract_path_text('{"f2":{"f3":1},"f4":{"f5":99,"f6":"star"}','f4','f6') ...