[ci skip] Merge pull request #5183 from ytetsuro/add_oci8_driver_write_type
[ci skip] Merge pull request #5183 from ytetsuro/add_oci8_driver_write_type

add is_write_type method for merge query
tianhe1986/CodeIgniter,jim-parry/CodeIgniter,ganiutomo/CodeIgniter,jim-parry/CodeIgniter,tianhe1986/CodeIgniter,poing/CodeIgniter,Tpojka/CodeIgniter,smallp/CodeIgniter,butane/CodeIgniter,kamaslau/BasicCodeIgniter,bcit-ci/CodeIgniter,jim-parry/CodeIgniter,kamaslau/BasicCodeIgniter,tianhe1986/CodeIgniter,asmdigital/CodeIgniter,asmdigital/CodeIgniter,butane/CodeIgniter,asmdigital/CodeIgniter,butane/CodeIgniter,madwings/InsaneDB,butane/CodeIgniter,poing/CodeIgniter,kamaslau/BasicCodeIgniter,butane/CodeIgniter,ganiutomo/CodeIgniter,asmdigital/CodeIgniter,kamaslau/BasicCodeIgniter,bcit-ci/CodeIgniter,poing/CodeIgniter,Tpojka/CodeIgniter,bcit-ci/CodeIgniter,ytetsuro/CodeIgniter,Tpojka/CodeIgniter,ganiutomo/CodeIgniter,jim-parry/CodeIgniter,Tpojka/CodeIgniter,madwings/InsaneDB,ytetsuro/CodeIgniter,bcit-ci/CodeIgniter,jim-parry/CodeIgniter,ganiutomo/CodeIgniter,madwings/InsaneDB,tianhe1986/CodeIgniter,ytetsuro/CodeIgniter,ytetsuro/CodeIgniter,smallp/CodeIgniter,ganiutomo/CodeIgniter,madwings/InsaneDB,tianhe1986/CodeIgniter,asmdigital/CodeIgniter,bcit-ci/CodeIgniter,poing/CodeIgniter,madwings/InsaneDB,ytetsuro/CodeIgniter,Tpojka/CodeIgniter,poing/CodeIgniter