mysql> SELECT TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, DATA_TYPE FROM columns WHERE DATA_TYPE IN ('text', 'blob') AND TABLE_SCHEMA = 'observium';
+--------------+------------------+-----------------------+-----------+
| TABLE_SCHEMA | TABLE_NAME | COLUMN_NAME | DATA_TYPE |
+--------------+------------------+-----------------------+-----------+
| observium | alert_assoc | device_attribs | text |
| observium | alert_assoc | entity_attribs | text |
| observium | alert_log | message | text |
| observium | alert_tests | alert_message | text |
| observium | alert_tests | conditions | text |
| observium | alerts | message | text |
| observium | authlog | user | text |
| observium | authlog | address | text |
| observium | authlog | result | text |
| observium | bgpPeers | bgpPeerState | text |
| observium | bgpPeers | bgpPeerAdminStatus | text |
| observium | bill_history | bill_type | text |
| observium | bills | bill_name | text |
| observium | bills | bill_type | text |
| observium | config | config_value | text |
| observium | devices | sysDescr | text |
| observium | devices | sysContact | text |
| observium | devices | version | text |
| observium | devices | hardware | text |
| observium | devices | features | text |
| observium | devices | location | text |
| observium | devices | device_state | text |
| observium | devices_attribs | attrib_value | text |
| observium | eigrp_ports | eigrp_authmode | text |
| observium | entPhysical | entPhysicalDescr | text |
| observium | entPhysical | entPhysicalClass | text |
| observium | entPhysical | entPhysicalName | text |
| observium | entPhysical | entPhysicalModelName | text |
| observium | entPhysical | entPhysicalVendorType | text |
| observium | entPhysical | entPhysicalSerialNum | text |
| observium | entPhysical | entPhysicalMfgName | text |
| observium | eventlog | message | text |
| observium | groups_assoc | device_attribs | text |
| observium | groups_assoc | entity_attribs | text |
| observium | hrDevice | hrDeviceDescr | text |
| observium | hrDevice | hrDeviceType | text |
| observium | hrDevice | hrDeviceStatus | text |
| observium | munin_plugins | mplug_info | text |
| observium | munin_plugins_ds | ds_extinfo | text |
| observium | munin_plugins_ds | ds_sum | text |
| observium | munin_plugins_ds | ds_stack | text |
| observium | services | service_ip | text |
| observium | services | service_desc | text |
| observium | services | service_param | text |
| observium | services | service_message | text |
| observium | storage | storage_descr | text |
| observium | syslog | msg | text |
| observium | users | user_options | text |
| observium | vrfs | mplsVpnVrfDescription | text |
+--------------+------------------+-----------------------+-----------+
49 rows in set (0.04 sec)