處理方式：將傳入的Json字符串保存到表值函數中，讀取表值函數中的數據
表值函數建立如下：
1 CREATE FUNCTION [dbo].[parseJSON] 2 ( 3 @Json NVARCHAR(MAX) 4 ) 5 RETURNS @hierarchy TABLE 6 ( 7 element_id INT IDENTITY(1, 1) NOT NULL, /* internal surrogate primary key gives the order of parsing and the list order */ 8 sequenceNo [int] NULL, /* the place in the sequence for the element */ 9 parent_ID INT,/* if the element has a parent then it is in this column. The document is the ultimate parent, so you can get the structure from recursing from the document */ 10 Object_ID INT,/* each list or object has an object id. This ties all elements to a parent. Lists are treated as objects here */ 11 NAME NVARCHAR(2000),/* the name of the object */ 12 StringValue NVARCHAR(MAX) NOT NULL,/*the string representation of the value of the element. */ 13 ValueType VARCHAR(10) NOT null /* the declared type of the value represented as a string in StringValue*/ 14 ) 15 AS 16 BEGIN 17 18 DECLARE 19 @FirstObject INT, --the index of the first open bracket found in the JSON string 20 @OpenDelimiter INT,--the index of the next open bracket found in the JSON string 21 @NextOpenDelimiter INT,--the index of subsequent open bracket found in the JSON string 22 @NextCloseDelimiter INT,--the index of subsequent close bracket found in the JSON string 23 @Type NVARCHAR(10),--whether it denotes an object or an array 24 @NextCloseDelimiterChar CHAR(1),--either a '}' or a ']' 25 @Contents NVARCHAR(MAX), --the unparsed contents of the bracketed expression 26 @Start INT, --index of the start of the token that you are parsing 27 @end INT,--index of the end of the token that you are parsing 28 @param INT,--the parameter at the end of the next Object/Array token 29 @EndOfName INT,--the index of the start of the parameter at end of Object/Array token 30 @token NVARCHAR(200),--either a string or object 31 @value NVARCHAR(MAX), -- the value as a string 32 @SequenceNo int, -- the sequence number within a list 33 @name NVARCHAR(200), --the name as a string 34 @parent_ID INT,--the next parent ID to allocate 35 @lenJSON INT,--the current length of the JSON String 36 @characters NCHAR(36),--used to convert hex to decimal 37 @result BIGINT,--the value of the hex symbol being parsed 38 @index SMALLINT,--used for parsing the hex value 39 @Escape INT --the index of the next escape character 40 DECLARE @Strings TABLE /* in this temporary table we keep all strings, even the names of the elements, since they are 'escaped' in a different way, and may contain, unescaped, brackets denoting objects or lists. These are replaced in the JSON string by tokens representing the string */ 41 ( 42 String_ID INT IDENTITY(1, 1),StringValue NVARCHAR(MAX) 43 ) 44 SELECT--initialise the characters to convert hex to ascii 45 @characters='0123456789abcdefghijklmnopqrstuvwxyz', 46 @SequenceNo=0, --set the sequence no. to something sensible. 47 @parent_ID=0; 48 WHILE 1=1 --forever until there is nothing more to do 49 BEGIN 50 SELECT 51 @start=PATINDEX('%[^a-zA-Z]["]%', @json collate SQL_Latin1_General_CP850_Bin);--next delimited string 52 IF @start=0 BREAK --no more so drop through the WHILE loop 53 IF SUBSTRING(@json, @start+1, 1)='"' 54 BEGIN --Delimited Name 55 SET @start=@Start+1; 56 SET @end=PATINDEX('%[^\]["]%', RIGHT(@json, LEN(@json+'|')-@start)); 57 END 58 IF @end=0 --no end delimiter to last string 59 BREAK --no more 60 SELECT @token=SUBSTRING(@json, @start+1, @end-1) 61 SELECT @token=REPLACE(@token, FROMString, TOString) 62 FROM 63 (SELECT 64 '\"' AS FromString, '"' AS ToString 65 UNION ALL SELECT '\\', '\' 66 UNION ALL SELECT '\/', '/' 67 UNION ALL SELECT '\b', CHAR(08) 68 UNION ALL SELECT '\f', CHAR(12) 69 UNION ALL SELECT '\n', CHAR(10) 70 UNION ALL SELECT '\r', CHAR(13) 71 UNION ALL SELECT '\t', CHAR(09) 72 UNION ALL SELECT '゛', CHAR(09) 73 ) substitutions 74 SELECT @result=0,@escape=1 75 WHILE @escape>0 76 BEGIN 77 SELECT @index=0, 78 @escape=PATINDEX('%\x[0-9a-f][0-9a-f][0-9a-f][0-9a-f]%', @token) 79 IF @escape>0 --if there is one 80 BEGIN 81 WHILE @index<4 --there are always four digits to a \x sequence 82 BEGIN 83 SELECT --determine its value 84 @result=@result+POWER(16, @index) 85 *(CHARINDEX(SUBSTRING(@token, @escape+2+3-@index, 1), 86 @characters)-1), @index=@index+1 ; 87 END 88 SELECT @token=STUFF(@token, @escape, 6, NCHAR(@result)) 89 END 90 END 91 INSERT INTO @Strings (StringValue) SELECT @token 92 SELECT @JSON=STUFF(@json, @start, @end+1,'@string'+CONVERT(NVARCHAR(5), @@identity)) 93 END 94 WHILE 1=1 --forever until there is nothing more to do 95 BEGIN 96 SELECT @parent_ID=@parent_ID+1 97 SELECT @FirstObject=PATINDEX('%[{[[]%', @json collate SQL_Latin1_General_CP850_Bin)--object or array 98 IF @FirstObject = 0 BREAK 99 IF (SUBSTRING(@json, @FirstObject, 1)='{') 100 SELECT @NextCloseDelimiterChar='}', @type='object' 101 ELSE 102 SELECT @NextCloseDelimiterChar=']', @type='array' 103 SELECT @OpenDelimiter=@firstObject 104 WHILE 1=1 --find the innermost object or list... 105 BEGIN 106 SELECT 107 @lenJSON=LEN(@JSON+'|')-1 108 SELECT 109 @NextCloseDelimiter=CHARINDEX(@NextCloseDelimiterChar,@json,@OpenDelimiter+1) 110 SELECT @NextOpenDelimiter=PATINDEX('%[{[[]%', 111 RIGHT(@json, @lenJSON-@OpenDelimiter)collate SQL_Latin1_General_CP850_Bin)--object 112 IF @NextOpenDelimiter=0 113 BREAK 114 SELECT @NextOpenDelimiter=@NextOpenDelimiter+@OpenDelimiter 115 IF @NextCloseDelimiter<@NextOpenDelimiter 116 BREAK 117 IF SUBSTRING(@json, @NextOpenDelimiter, 1)='{' 118 SELECT @NextCloseDelimiterChar='}', @type='object' 119 ELSE 120 SELECT @NextCloseDelimiterChar=']', @type='array' 121 SELECT @OpenDelimiter=@NextOpenDelimiter 122 END 123 SELECT 124 @contents=SUBSTRING(@json, @OpenDelimiter+1,@NextCloseDelimiter-@OpenDelimiter-1) 125 SELECT 126 @JSON=STUFF(@json, @OpenDelimiter,@NextCloseDelimiter-@OpenDelimiter+1,'@'+@type+CONVERT(NVARCHAR(5), @parent_ID)) 127 WHILE (PATINDEX('%[A-Za-z0-9@+.e]%', @contents collate SQL_Latin1_General_CP850_Bin))<>0 128 BEGIN 129 IF @Type='Object' --it will be a 0-n list containing a string followed by a string, number,boolean, or null 130 BEGIN 131 SELECT 132 @SequenceNo=0,@end=CHARINDEX(':', ' '+@contents)--if there is anything, it will be a string-based name. 133 SELECT @start=PATINDEX('%[^A-Za-z@][@]%', ' '+@contents)--AAAAAAAA 134 SELECT @token=SUBSTRING(' '+@contents, @start+1, @End-@Start-1), 135 @endofname=PATINDEX('%[0-9]%', @token collate SQL_Latin1_General_CP850_Bin), 136 @param=RIGHT(@token, LEN(@token)-@endofname+1) 137 SELECT 138 @token=LEFT(@token, @endofname-1), 139 @Contents=RIGHT(' '+@contents, LEN(' '+@contents+'|')-@end-1) 140 SELECT @name=stringvalue FROM @strings 141 WHERE string_id=@param --fetch the name 142 END 143 ELSE 144 SELECT @Name=null,@SequenceNo=@SequenceNo+1 145 SELECT 146 @end=CHARINDEX(',', @contents)-- a string-token, object-token, list-token, number,boolean, or null 147 IF @end=0 148 SELECT @end=PATINDEX('%[A-Za-z0-9@+.e][^A-Za-z0-9@+.e]%', @Contents+' ') +1 149 SELECT 150 @start=PATINDEX('%[^A-Za-z0-9@+.e][A-Za-z0-9@+.e]%', ' '+@contents) 151 --select @start,@end, LEN(@contents+'|'), @contents 152 SELECT 153 @Value=RTRIM(SUBSTRING(@contents, @start, @End-@Start)), 154 @Contents=RIGHT(@contents+' ', LEN(@contents+'|')-@end) 155 IF SUBSTRING(@value, 1, 7)='@object' 156 INSERT INTO @hierarchy 157 (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType) 158 SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 8, 5), 159 SUBSTRING(@value, 8, 5), 'object' 160 ELSE 161 IF SUBSTRING(@value, 1, 6)='@array' 162 INSERT INTO @hierarchy 163 (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType) 164 SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 7, 5), 165 SUBSTRING(@value, 7, 5), 'array' 166 ELSE 167 IF SUBSTRING(@value, 1, 7)='@string' 168 INSERT INTO @hierarchy 169 (NAME, SequenceNo, parent_ID, StringValue, ValueType) 170 SELECT @name, @SequenceNo, @parent_ID, stringvalue, 'string' 171 FROM @strings 172 WHERE string_id=SUBSTRING(@value, 8, 5) 173 ELSE 174 IF @value IN ('true', 'false') 175 INSERT INTO @hierarchy 176 (NAME, SequenceNo, parent_ID, StringValue, ValueType) 177 SELECT @name, @SequenceNo, @parent_ID, @value, 'boolean' 178 ELSE 179 IF @value='null' 180 INSERT INTO @hierarchy 181 (NAME, SequenceNo, parent_ID, StringValue, ValueType) 182 SELECT @name, @SequenceNo, @parent_ID, @value, 'null' 183 ELSE 184 IF PATINDEX('%[^0-9]%', @value collate SQL_Latin1_General_CP850_Bin)>0 185 INSERT INTO @hierarchy 186 (NAME, SequenceNo, parent_ID, StringValue, ValueType) 187 SELECT @name, @SequenceNo, @parent_ID, @value, 'real' 188 ELSE 189 INSERT INTO @hierarchy 190 (NAME, SequenceNo, parent_ID, StringValue, ValueType) 191 SELECT @name, @SequenceNo, @parent_ID, @value, 'int' 192 193 if @Contents=' ' Select @SequenceNo=0 194 END 195 END 196 RETURN 197 END
測試如下：
傳入的Json字符串如下：
{
"data":{
"order_sn":"liaoning19032114523809671",
"created_at":1553152116,
"storeno":"SYS20170209014",
"goods_amount":"3880.00",
"order_amount":"3880.00",
"points":"0.00",
"pmt_amount":"64.20",
"suppliers_name":"盤錦愛心電腦科技有限公司",
"products":[
{
"sn":"90NB0E42-M02110",
"number":"2",
"price":"1940.00"
}
],
"coupon":[
{
"coupon_code":"As20190314140336018"
},
{
"coupon_code":"As20190314140443050"
}
],
"user_id":5284
}
}
使用表值函數后，查詢到的數據入下：
