sql server - recorrer - Parse JSON en TSQL

sql server parse json

Question

¿Es posible analizar JSON en TSQL? No me refiero a crear una cadena JSON, me refiero a analizar una cadena json pasada como parámetro.

Answer 1

Actualización: a partir de SQL Server 2016, ahora es posible analizar JSON en TSQL .

Nativamente, no hay soporte. Tendrás que usar CLR. Es tan simple como eso, a menos que tengas una gran racha masoquista y quieras escribir un analizador JSON en SQL

Normalmente, la gente pide salida JSON de la base de datos y hay ejemplos en Internet. Pero en una base de datos?

Answer 2

¡Finalmente, SQL Server 2016 agregará soporte Native JSON!

Árbitro:

Las capacidades adicionales en SQL Server 2016 incluyen:

• Mejoras de seguridad adicionales para seguridad a nivel de fila y máscara de datos dinámica para completar nuestras inversiones de seguridad con Always
  Encriptado
• Mejoras en AlwaysOn para una disponibilidad más robusta y recuperación ante desastres con múltiples réplicas síncronas y carga secundaria
  equilibrio.
• Soporte Native JSON para ofrecer un mejor rendimiento y soporte para sus muchos tipos de datos.
• Las herramientas de administración de información empresarial (EIM) de SQL Server y Analysis Services obtienen una actualización en rendimiento, usabilidad y escalabilidad.
• Copias de seguridad híbridas más rápidas, alta disponibilidad y escenarios de recuperación ante desastres para realizar copias de seguridad y restaurar sus bases de datos locales a Azure
  y coloque los secundarios de SQL Server AlwaysOn en Azure.

Anuncio: http://blogs.technet.com/b/dataplatforminsider/archive/2015/05/04/sql-server-2016-public-preview-coming-this-summer.aspx

Características blog post: http://blogs.msdn.com/b/jocapc/archive/2015/05/16/json-support-in-sql-server-2016.aspx

Answer 3

Ahora hay un soporte nativo en SQL Server (CTP3) para importar, exportar, consultar y validar JSON dentro de T-SQL Consulte https://msdn.microsoft.com/en-us/library/dn921897.aspx

Answer 4

He visto un artículo bastante prolijo sobre esto ... así que si te gusta esto:

CREATE PROC [dbo].[spUpdateMarks]
@inputJSON VARCHAR(MAX) -- ''[{"ID":"1","C":"60","CPP":"60","CS":"60"}]''
AS
BEGIN
-- Temp table to hold the parsed data
DECLARE @TempTableVariable TABLE(
element_id INT,
sequenceNo INT,
parent_ID INT,
[Object_ID] INT,
[NAME] NVARCHAR(2000),
StringValue NVARCHAR(MAX),
ValueType NVARCHAR(10)
)
-- Parse JSON string into a temp table
INSERT INTO @TempTableVariable
SELECT * FROM parseJSON(@inputJSON)
END

Intenta mirar aquí:

https://www.simple-talk.com/sql/t-sql-programming/consuming-json-strings-in-sql-server/

Hay un proyecto completo de ASP.Net sobre esto aquí: http://www.codeproject.com/Articles/788208/Update-Multiple-Rows-of-GridView-using-JSON-in-ASP

Answer 5

Parece que tengo una gran racha masoquista porque he escrito un analizador JSON. Convierte un documento JSON en una tabla de lista de adyacencia SQL, que es fácil de usar para actualizar sus tablas de datos. En realidad, lo he hecho peor, ya que he hecho código para hacer el proceso inverso, que es pasar de una tabla de jerarquía a una cadena JSON

El artículo y el código están aquí: simple-talk.com/sql/t-sql-programming/… .

Select * from parseJSON(''{
"Person":
{
"firstName": "John",
"lastName": "Smith",
"age": 25,
"Address":
{
"streetAddress":"21 2nd Street",
"city":"New York",
"state":"NY",
"postalCode":"10021"
},
"PhoneNumbers":
{
"home":"212 555-1234",
"fax":"646 555-4567"
}
}
}
'')

Llegar:

Answer 6

SQL Server 2016 admite json data análisis de json data mediante OPENJSON . Puede usar OPENJSON para asignar json data a filas y columnas.

Su json Data

[
{ "id" : 2,"name": "John"},
{ "id" : 5,"name": "John"}
]

Aquí es cómo puedes manejar json en sql

//@pJson is json data passed from code.
INSERT INTO YourTable (id, Name)
SELECT id, name
FROM OPENJSON(@pJson)
WITH (id int,
name nvarchar(max))

Here hay un artículo detallado que cubre este tema.

Answer 7

También tengo una gran racha masoquista ya que he escrito otro analizador JSON. Este usa un enfoque de procedimiento. Utiliza una tabla de lista de jerarquía SQL similar para almacenar los datos analizados. También en el paquete están:

• Proceso inverso: de la jerarquía a JSON
• Funciones de consulta: para obtener valores particulares de un objeto JSON

Por favor, siéntase libre de usarlo y divertirse con él

http://www.codeproject.com/Articles/1000953/JSON-for-Sql-Server-Part

Answer 8

CREATE FUNCTION dbo.parseJSON( @JSON NVARCHAR(MAX))
RETURNS @hierarchy TABLE
(
element_id INT IDENTITY(1, 1) NOT NULL, /* internal surrogate primary key gives the order of parsing and the list order */
sequenceNo [int] NULL, /* the place in the sequence for the element */
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 */
Object_ID INT,/* each list or object has an object id. This ties all elements to a parent. Lists are treated as objects here */
NAME NVARCHAR(2000),/* the name of the object */
StringValue NVARCHAR(MAX) NOT NULL,/*the string representation of the value of the element. */
ValueType VARCHAR(10) NOT null /* the declared type of the value represented as a string in StringValue*/
)
AS
BEGIN
DECLARE
@FirstObject INT, --the index of the first open bracket found in the JSON string
@OpenDelimiter INT,--the index of the next open bracket found in the JSON string
@NextOpenDelimiter INT,--the index of subsequent open bracket found in the JSON string
@NextCloseDelimiter INT,--the index of subsequent close bracket found in the JSON string
@Type NVARCHAR(10),--whether it denotes an object or an array
@NextCloseDelimiterChar CHAR(1),--either a ''}'' or a '']''
@Contents NVARCHAR(MAX), --the unparsed contents of the bracketed expression
@Start INT, --index of the start of the token that you are parsing
@end INT,--index of the end of the token that you are parsing
@param INT,--the parameter at the end of the next Object/Array token
@EndOfName INT,--the index of the start of the parameter at end of Object/Array token
@token NVARCHAR(200),--either a string or object
@value NVARCHAR(MAX), -- the value as a string
@SequenceNo int, -- the sequence number within a list
@name NVARCHAR(200), --the name as a string
@parent_ID INT,--the next parent ID to allocate
@lenJSON INT,--the current length of the JSON String
@characters NCHAR(36),--used to convert hex to decimal
@result BIGINT,--the value of the hex symbol being parsed
@index SMALLINT,--used for parsing the hex value
@Escape INT --the index of the next escape character
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 */
(
String_ID INT IDENTITY(1, 1),
StringValue NVARCHAR(MAX)
)
SELECT--initialise the characters to convert hex to ascii
@characters=''0123456789abcdefghijklmnopqrstuvwxyz'',
@SequenceNo=0, --set the sequence no. to something sensible.
/* firstly we process all strings. This is done because [{} and ] aren''t escaped in strings, which complicates an iterative parse. */
@parent_ID=0;
WHILE 1=1 --forever until there is nothing more to do
BEGIN
SELECT
@start=PATINDEX(''%[^a-zA-Z]["]%'', @json collate SQL_Latin1_General_CP850_Bin);--next delimited string
IF @start=0 BREAK --no more so drop through the WHILE loop
IF SUBSTRING(@json, @start+1, 1)=''"''
BEGIN --Delimited Name
SET @start=@Start+1;
SET @end=PATINDEX(''%[^/]["]%'', RIGHT(@json, LEN(@json+''|'')-@start) collate SQL_Latin1_General_CP850_Bin);
END
IF @end=0 --no end delimiter to last string
BREAK --no more
SELECT @token=SUBSTRING(@json, @start+1, @end-1)
--now put in the escaped control characters
SELECT @token=REPLACE(@token, FROMString, TOString)
FROM
(SELECT
''/"'' AS FromString, ''"'' AS ToString
UNION ALL SELECT ''//', ''/'
UNION ALL SELECT ''//'', ''/''
UNION ALL SELECT ''/b'', CHAR(08)
UNION ALL SELECT ''/f'', CHAR(12)
UNION ALL SELECT ''/n'', CHAR(10)
UNION ALL SELECT ''/r'', CHAR(13)
UNION ALL SELECT ''/t'', CHAR(09)
) substitutions
SELECT @result=0, @escape=1
--Begin to take out any hex escape codes
WHILE @escape>0
BEGIN
SELECT @index=0,
--find the next hex escape sequence
@escape=PATINDEX(''%/x[0-9a-f][0-9a-f][0-9a-f][0-9a-f]%'', @token collate SQL_Latin1_General_CP850_Bin)
IF @escape>0 --if there is one
BEGIN
WHILE @index<4 --there are always four digits to a /x sequence
BEGIN
SELECT --determine its value
@result=@result+POWER(16, @index)
*(CHARINDEX(SUBSTRING(@token, @escape+2+3-@index, 1),
@characters)-1), @index=@index+1 ;
END
-- and replace the hex sequence by its unicode value
SELECT @token=STUFF(@token, @escape, 6, NCHAR(@result))
END
END
--now store the string away
INSERT INTO @Strings (StringValue) SELECT @token
-- and replace the string with a token
SELECT @JSON=STUFF(@json, @start, @end+1,
''@string''+CONVERT(NVARCHAR(5), @@identity))
END
-- all strings are now removed. Now we find the first leaf.
WHILE 1=1 --forever until there is nothing more to do
BEGIN
SELECT @parent_ID=@parent_ID+1
--find the first object or list by looking for the open bracket
SELECT @FirstObject=PATINDEX(''%[{[[]%'', @json collate SQL_Latin1_General_CP850_Bin)--object or array
IF @FirstObject = 0 BREAK
IF (SUBSTRING(@json, @FirstObject, 1)=''{'')
SELECT @NextCloseDelimiterChar=''}'', @type=''object''
ELSE
SELECT @NextCloseDelimiterChar='']'', @type=''array''
SELECT @OpenDelimiter=@firstObject
WHILE 1=1 --find the innermost object or list...
BEGIN
SELECT
@lenJSON=LEN(@JSON+''|'')-1
--find the matching close-delimiter proceeding after the open-delimiter
SELECT
@NextCloseDelimiter=CHARINDEX(@NextCloseDelimiterChar, @json,
@OpenDelimiter+1)
--is there an intervening open-delimiter of either type
SELECT @NextOpenDelimiter=PATINDEX(''%[{[[]%'',
RIGHT(@json, @lenJSON-@OpenDelimiter)collate SQL_Latin1_General_CP850_Bin)--object
IF @NextOpenDelimiter=0
BREAK
SELECT @NextOpenDelimiter=@NextOpenDelimiter+@OpenDelimiter
IF @NextCloseDelimiter<@NextOpenDelimiter
BREAK
IF SUBSTRING(@json, @NextOpenDelimiter, 1)=''{''
SELECT @NextCloseDelimiterChar=''}'', @type=''object''
ELSE
SELECT @NextCloseDelimiterChar='']'', @type=''array''
SELECT @OpenDelimiter=@NextOpenDelimiter
END
---and parse out the list or name/value pairs
SELECT
@contents=SUBSTRING(@json, @OpenDelimiter+1,
@NextCloseDelimiter-@OpenDelimiter-1)
SELECT
@JSON=STUFF(@json, @OpenDelimiter,
@NextCloseDelimiter-@OpenDelimiter+1,
''@''+@type+CONVERT(NVARCHAR(5), @parent_ID))
WHILE (PATINDEX(''%[A-Za-z0-9@+.e]%'', @contents collate SQL_Latin1_General_CP850_Bin))<>0
BEGIN
IF @Type=''Object'' --it will be a 0-n list containing a string followed by a string, number,boolean, or null
BEGIN
SELECT
@SequenceNo=0,@end=CHARINDEX('':'', '' ''+@contents)--if there is anything, it will be a string-based name.
SELECT @start=PATINDEX(''%[^A-Za-z@][@]%'', '' ''+@contents collate SQL_Latin1_General_CP850_Bin)--AAAAAAAA
SELECT @token=SUBSTRING('' ''+@contents, @start+1, @End-@Start-1),
@endofname=PATINDEX(''%[0-9]%'', @token collate SQL_Latin1_General_CP850_Bin),
@param=RIGHT(@token, LEN(@token)-@endofname+1)
SELECT
@token=LEFT(@token, @endofname-1),
@Contents=RIGHT('' ''+@contents, LEN('' ''+@contents+''|'')-@end-1)
SELECT @name=stringvalue FROM @strings
WHERE string_id=@param --fetch the name
END
ELSE
SELECT @Name=null,@SequenceNo=@SequenceNo+1
SELECT
@end=CHARINDEX('','', @contents)-- a string-token, object-token, list-token, number,boolean, or null
IF @end=0
SELECT @end=PATINDEX(''%[A-Za-z0-9@+.e][^A-Za-z0-9@+.e]%'', @Contents+'' '' collate SQL_Latin1_General_CP850_Bin)
+1
SELECT
@start=PATINDEX(''%[^A-Za-z0-9@+.e][A-Za-z0-9@+.e]%'', '' ''+@contents collate SQL_Latin1_General_CP850_Bin)
--select @start,@end, LEN(@contents+''|''), @contents
SELECT
@Value=RTRIM(SUBSTRING(@contents, @start, @End-@Start)),
@Contents=RIGHT(@contents+'' '', LEN(@contents+''|'')-@end)
IF SUBSTRING(@value, 1, 7)=''@object''
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)
SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 8, 5),
SUBSTRING(@value, 8, 5), ''object''
ELSE
IF SUBSTRING(@value, 1, 6)=''@array''
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)
SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 7, 5),
SUBSTRING(@value, 7, 5), ''array''
ELSE
IF SUBSTRING(@value, 1, 7)=''@string''
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, ValueType)
SELECT @name, @SequenceNo, @parent_ID, stringvalue, ''string''
FROM @strings
WHERE string_id=SUBSTRING(@value, 8, 5)
ELSE
IF @value IN (''true'', ''false'')
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, ValueType)
SELECT @name, @SequenceNo, @parent_ID, @value, ''boolean''
ELSE
IF @value=''null''
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, ValueType)
SELECT @name, @SequenceNo, @parent_ID, @value, ''null''
ELSE
IF PATINDEX(''%[^0-9]%'', @value collate SQL_Latin1_General_CP850_Bin)>0
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, ValueType)
SELECT @name, @SequenceNo, @parent_ID, @value, ''real''
ELSE
INSERT INTO @hierarchy
(NAME, SequenceNo, parent_ID, StringValue, ValueType)
SELECT @name, @SequenceNo, @parent_ID, @value, ''int''
if @Contents='' '' Select @SequenceNo=0
END
END
INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType)
SELECT ''-'',1, NULL, '''', @parent_id-1, @type
--
RETURN
END
GO

--- Pase JSON

Declare @pars varchar(MAX) =
'' {"shapes":[{"type":"polygon","geofenceName":"","geofenceDescription":"",
"geofenceCategory":"1","color":"#1E90FF","paths":[{"path":[{
"lat":"26.096254906968525","lon":"65.709228515625"}
,{"lat":"28.38173504322308","lon":"66.741943359375"}
,{"lat":"26.765230565697482","lon":"68.983154296875"}
,{"lat":"26.254009699865737","lon":"68.609619140625"}
,{"lat":"25.997549919572112","lon":"68.104248046875"}
,{"lat":"26.843677401113002","lon":"67.115478515625"}
,{"lat":"25.363882272740255","lon":"65.819091796875"}]}]}]}''
Select * from parseJSON(@pars) AS MyResult