db-ctl-base: Allow print rows that weak reference to table in

'cmd_show_table'.

Sometimes, it is desirable to print the table with weak reference to
the table specified in 'struct cmd_show_table'.  For example the
Port_Binding table rows in OVN_Southbound database that refer to the
same Chassis table row can be printed under the same chassis entry
in 'ovn-sbctl show' output.

To achieve it, this commit adds a new struct in 'struct cmd_show_table'
that allows users to print a table with weak reference to 'table'
specified in 'struct cmd_show_table'.  The 'ovn-sbctl' which now prints
the Port_Binding entries with Chassis table, is the first user of this
new feature.

Requested-by: Justin Pettit <jpettit@nicira.com>
Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Justin Pettit <jpettit@nicira.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/ovn-sbctl.at b/tests/ovn-sbctl.at
index 6bda181eb..16968fd06 100644
--- a/tests/ovn-sbctl.at
+++ b/tests/ovn-sbctl.at
@@ -48,6 +48,30 @@ AT_CHECK([ovn-sbctl show], [0], [dnl
 Chassis "ch0"
     Encap stt
         ip: "1.2.3.5"
+    Port_Binding "vif0"
+])
+
+# adds another 'vif1'
+AT_CHECK([ovn-nbctl lport-add br-test vif1])
+AT_CHECK([ovn-nbctl lport-set-macs vif1 f0:ab:cd:ef:01:03])
+AT_CHECK([ovn-sbctl lport-bind vif1 ch0])
+
+AT_CHECK([ovn-sbctl show | sed 's/vif[[0-9]]/vif/'], [0], [dnl
+Chassis "ch0"
+    Encap stt
+        ip: "1.2.3.5"
+    Port_Binding "vif"
+    Port_Binding "vif"
+])
+
+# deletes 'vif1'
+AT_CHECK([ovn-nbctl lport-del vif1])
+
+AT_CHECK([ovn-sbctl show], [0], [dnl
+Chassis "ch0"
+    Encap stt
+        ip: "1.2.3.5"
+    Port_Binding "vif0"
 ])
 
 uuid=$(ovn-sbctl --columns=_uuid list Chassis ch0 | cut -d ':' -f2 | tr -d ' ')