Merge pull request #679 from CartoDB/bug/ch140184/gloval-seven-admin-batch-query-fallback-templates

[ch140184] Update documentation about fallback templates

docs/guides/03-batch-queries.md

@@ -449,7 +449,7 @@ If a query of a job fails (and onerror fallbacks for that query and job are defi
 
 #### Templates
 
-Batch Queries provide a simple way to get the error message and the job identifier to be used in your fallbacks, by using the following templates:
+Batch Queries provide a simple way to get the error message and the job identifier to be used in your fallbacks defined at the query level, by using the following templates:
 
  - `<%= error_message %>`: will be replaced by the error message raised by the database.
  - `<%= job_id %>`: will be replaced by the job identifier that Batch Queries provides.
@@ -460,15 +460,13 @@ This is helpful when you want to save error messages into a table:
 curl -X POST -H "Content-Type: application/json" -d '{
   "query": {
     "query": [{
-      "query": "UPDATE wrong_table SET price = '$100.00' WHERE company = 'CARTO'"
-    }],
-    "onerror": "INSERT INTO errors_log (job_id, error_message, date) VALUES ('<%= job_id %>', '<%= error_message %>', NOW())"
+      "query": "UPDATE wrong_table SET price = '$100.00' WHERE company = 'CARTO'",
+      "onerror": "INSERT INTO errors_log (job_id, error_message, date) VALUES ('<%= job_id %>', '<%= error_message %>', NOW())"
+    }]
   }
 }' "https://{username}.carto.com/api/v2/sql/job"
 ```
 
-More templates are coming soon.
-
 ### Fetching Job Results
 
 In some scenarios, you may need to fetch the output of a job. If that is the case, wrap the query with `SELECT * INTO`, or `CREATE TABLE AS`. The output is stored in a new table in your database. For example, if using the query `SELECT * FROM airports`: