map keys terminated by ':' -- map中键值对之间用':'分隔 lines terminated by '\n';-- 行之间用'\n'分隔 insert into temp.jc_t_test_json select "日月神教", array("东方不败", "任盈盈", "曲阳"); insert into temp.jc_t_test_json select "五岳
go 类型打包: NewRaw(), NewNumber(), NewNull(), NewBool(), NewString(), NewObject(), NewArray() 迭代: Values(), Properties(), ForEach(), SortKeys() 修改: Set(), SetByIndex(), Add() 最佳实践 预热 由于Sonic 使用 golang-asm 作为JIT 汇编器,这个库并不适用于运行时编译,第一次运...
= o.end()) { // there is an entry with key "foo" } // or simpler using count() int foo_present = o.count("foo"); // 1 int fob_present = o.count("fob"); // 0 // delete an entry o.erase("foo"); Conversion from STL containers Any sequence container (std::array, std...
如果jsonArray 不是有效的 JSON 字串或 NULL,則函式會傳回 NULL。 範例 SQL 複製 > SELECT json_array_length('[1,2,3,4]'); 4 > SELECT json_array_length('[1,2,3,{"f1":1,"f2":[5,6]},4]'); 5 > SELECT json_array_length('[1,2'); NULL 相關函數 json_obj...
TRANS_ARRAY TRANS_COLS TRANSFORM TRANSFORM_KEYS TRANSFORM_VALUES TRANSLATE TRIM TRUNC UNBASE64 UNHEX UNIQUE_ID UNIX_TIMESTAMP URL_DECODE URL_ENCODE USE_WRAPPED_KEYSET UUID VAR_SAMP VARIANCE/VAR_POP WEEKDAY WEEKOFYEAR WIDTH_BUCKET WM_CONCAT YEAR ZIP_WITH FAILIF 自定义函数(UDF) 自定义类型(UDT)...
Using a CodingKey structure to decode dynamic keys as a Swift array Most of the time,nested JSON objectscan be decoded by creating Swift types that match their structure. However, sometimes, a JSON object contains dynamic keys with unpredictable names. Such fields cannot be represented by stored...
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Key names. For example,$.nameand$."first name". If the key name starts with a dollar sign or contains special characters such as spaces or dot operators(.), surround it with quotes. Array elements. For example,$.product[3]. Arrays are zero-based. ...
sort_keys参数:表示序列化时是否对dict的key进行排序(dict默认是无序的) indent参数:表示缩进的意思,它可以使得数据存储的格式变得更加优雅、可读性更强;如果indent是一个非负整数或字符串,则JSON array元素和object成员将会被以相应的缩进级别进行打印输出;如果indent是0或负数或空字符串,则将只会插入换行,不会有...
(0.00 sec) With window frames: SELECT id, attribute, JSON_ARRAYAGG(attribute) OVER w attribute_arr FROM t1 WINDOW w AS (PARTITION BY id ORDER BY attribute ROWS BETWEEN 2 PRECEDING AND 1 FOLLOWING); +---+---+---+ | id | attribute | attribute_arr | +---+---+---+ | 1 | co...