copy from .vim/ftplugin/sql.vim
copy to .vim/after/ftplugin/sql.vim
--- a/.vim/ftplugin/sql.vim
+++ b/.vim/after/ftplugin/sql.vim
@@ -9,4 +9,4 @@
" cpanm https://github.com/darold/pgFormatter.git
let &l:equalprg = "pg_format -"
-
+let &l:omnifunc = "syntaxcomplete#Complete"