{ 
  "FieldLOV_CustomSQL_SQLTruncate": {
    "layout":"form",
    "table":"sale",
    "onecolumn":true,
    "caption":"Custom SQL - lov.sqltruncate",
    "fields":[
      {"name":"sale_id","caption":"Sales Order #"},
      {
        "name":"cust_id",
        "caption":"Customer",
        "lov":{
          "sql":"select cust_id code_val,cust_name code_txt from cust where 1=1 %%%TRUNCATE%%%",
          "sqltruncate":"cust_id=@cust_id"
        }
      }
    ]
  }
}