SQL Server guide

Update array or sub document

This example shows how to update Array / nested Sub-document by adding raw:: prefix infront of column name to treat column as json fragment

Standard SQL query example

This is the base query accepted by the connector. To execute it in SQL Server, you have to pass it to the Data Gateway via a Linked Server. See how to accomplish this using the examples below.

UPDATE MyIndex
  --raw JSON must be in one line		
  SET name = 'abcd', [raw::colors]='["yellow","red"]', [raw::location]='{x:10, y:20}' 
  WHERE _id='1'

Using OPENQUERY in SQL Server

SELECT * FROM OPENQUERY([LS_TO_ELASTICSEARCH_IN_GATEWAY], 'UPDATE MyIndex
  --raw JSON must be in one line		
  SET name = ''abcd'', [raw::colors]=''["yellow","red"]'', [raw::location]=''{x:10, y:20}'' 
  WHERE _id=''1''')

Using EXEC in SQL Server (handling larger SQL text)

The major drawback of OPENQUERY is its inability to incorporate variables within SQL statements. This often leads to the use of cumbersome dynamic SQL (with numerous ticks and escape characters).

Fortunately, starting with SQL 2005 and onwards, you can utilize the EXEC (your_sql) AT [LS_TO_ELASTICSEARCH_IN_GATEWAY] syntax.

DECLARE @MyQuery NVARCHAR(MAX) = 'UPDATE MyIndex
  --raw JSON must be in one line		
  SET name = ''abcd'', [raw::colors]=''["yellow","red"]'', [raw::location]=''{x:10, y:20}'' 
  WHERE _id=''1'''
EXEC (@MyQuery) AT [LS_TO_ELASTICSEARCH_IN_GATEWAY]