![]() The input and output variables used in the R script ( SQL_out, SQL_in) need to match the names defined with and including case. The default input and output variable names are InputDataSet and OutputDataSet, this script changes the names to SQL_in and SQL_out: EXECUTE sp_execute_external_script = N'R' Now let's change the names of the input and output variables. EXECUTE sp_execute_external_script = N'R' The WITH RESULT SETS clause defines the schema of the returned data table for SQL, adding the column name NewColName. It retrieves the data from the table using the SELECT statement, passes it through the R runtime, and returns the data as a data frame. Use the SELECT statement to query the table. CREATE TABLE RTestData (col1 INT NOT NULL) It then returns a single R data frame as output.įor now, let's use the default input and output variables of sp_execute_external_script: InputDataSet and OutputDataSet.Ĭreate a small table of test data. The command outputs the following text: Hello Worldīy default, sp_execute_external_script accepts a single dataset as input, which typically you supply in the form of a valid SQL query. You could also add the text to a variable of type nvarchar and then call the returned by the query, passed to the R runtime, which returns the data as a data frameĬlause defines the schema of the returned data table, adding "Hello World" as the column name, int for the data type Your entire R script must be enclosed in this argument, as Unicode text. Inputs to the sp_execute_external_script stored procedure include: the language extension to call, in this case, the commands passed to the R runtime. Results STDOUT message(s) from external script:Ī typical example script is one that just outputs the string "Hello World". The correct result is calculated and the R print function returns the result to the Messages window. Everything inside the argument must be valid R code. The script is passed through the argument. Pass the complete R script to the sp_execute_external_script stored procedure. Open Azure Data Studio and connect to your server. In the following steps, you'll run this example R script: a <- 1 This system stored procedure starts the R runtime, passes data to R, manages R user sessions securely, and returns any results to the client. To run an R script, you'll pass it as an argument to the system stored procedure, sp_execute_external_script. A tool for running SQL queries that contain R scripts. ![]() For information, see the Azure SQL Managed Instance Machine Learning Services overview. Azure SQL Managed Instance Machine Learning Services. ![]()
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