-----------------------
| rcu Customer |
|=====================|
| cus_s: customer |
-----------------------
|
| ------------------------------------
| | vrcx_cus Customer Short Name |
+-----------------|==================================|
| | cus_s: customer |
| ------------------------------------
|
|
| ----------------------------------------
| | rud User Defined Customer Fields |
+-----------------|======================================|
| | cus_s: customer |
| ----------------------------------------
cus_s |
|
| ----------------------------------------
| | ruet User Defined Customer Table |
+---------------->|======================================|
| | cus_s: customer |
| | unique_l: record # |
| ----------------------------------------
|
|
| -----------------------
| | ral Lessee |
+---------------->|=====================|
| | les_s: lessee |
| | cus_s: customer |
| -----------------------
|
|
| -----------------------
| | rls Lease |
+---------------->|=====================|
| lse_s: lease |
| cus_s: customer |
-----------------------
A join with the rls table on rls.cus_s is non-indexed and requires a search of the entire rls table.