added column data type example to client usage docu
added column data type example to client usage docu

crate/crate,sunny256/crate,gmrodrigues/crate,adrpar/crate,husky-koglhof/crate,sunny256/crate,EvilMcJerkface/crate,husky-koglhof/crate,gmrodrigues/crate,gmrodrigues/crate,crate/crate,aslanbekirov/crate,husky-koglhof/crate,sunny256/crate,puneetjaiswal/crate,aslanbekirov/crate,puneetjaiswal/crate,adrpar/crate,puneetjaiswal/crate,EvilMcJerkface/crate,crate/crate,adrpar/crate,EvilMcJerkface/crate,aslanbekirov/crate