Added in house invoice numbering to database triggers IO-460

hasura/migrations/1608740480171_run_sql_migration/down.yaml

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+[]

hasura/migrations/1608740480171_run_sql_migration/up.yaml

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+- args:
+    cascade: true
+    read_only: false
+    sql: "CREATE OR REPLACE FUNCTION public.assign_ibh_number()\r\n RETURNS trigger\r\n
+      LANGUAGE plpgsql\r\nAS $function$\r\n      begin\r\n        IF NEW.isinhouse
+      = true and (new.invoice_number  is null or new.invoice_number  = '') THEN\r\n
+      \          UPDATE counters\r\n\tSET count = count + 1 where shopid=new.shopid
+      AND countertype = 'ihbnum'\r\n\tRETURNING concat(prefix,count) into new.invoice_number;\r\n\r\n
+      \       END IF;\r\n        RETURN NEW;\r\n      END;\r\n  $function$\r\n;"
+  type: run_sql