db: Fix too broad catch clause
db: Fix too broad catch clause

The current handling, which ignores the future and a FIXME, should
apply only to the case when a table is missing.

raphaelsc/scylla,capturePointer/scylla,bowlofstew/scylla,tempbottle/scylla,phonkee/scylla,respu/scylla,eklitzke/scylla,wildinto/scylla,kangkot/scylla,aruanruan/scylla,eklitzke/scylla,phonkee/scylla,guiquanz/scylla,senseb/scylla,asias/scylla,kangkot/scylla,asias/scylla,senseb/scylla,rentongzhang/scylla,tempbottle/scylla,kjniemi/scylla,shaunstanislaus/scylla,tempbottle/scylla,gwicke/scylla,shaunstanislaus/scylla,linearregression/scylla,bowlofstew/scylla,stamhe/scylla,justintung/scylla,glommer/scylla,acbellini/scylla,rentongzhang/scylla,guiquanz/scylla,avikivity/scylla,bowlofstew/scylla,rluta/scylla,linearregression/scylla,scylladb/scylla,rluta/scylla,acbellini/scylla,raphaelsc/scylla,justintung/scylla,senseb/scylla,kjniemi/scylla,avikivity/scylla,kjniemi/scylla,duarten/scylla,duarten/scylla,gwicke/scylla,asias/scylla,shaunstanislaus/scylla,justintung/scylla,phonkee/scylla,acbellini/scylla,victorbriz/scylla,scylladb/scylla,gwicke/scylla,dwdm/scylla,respu/scylla,dwdm/scylla,linearregression/scylla,eklitzke/scylla,victorbriz/scylla,scylladb/scylla,kangkot/scylla,guiquanz/scylla,glommer/scylla,wildinto/scylla,aruanruan/scylla,scylladb/scylla,dwdm/scylla,rentongzhang/scylla,aruanruan/scylla,rluta/scylla,stamhe/scylla,respu/scylla,wildinto/scylla,stamhe/scylla,avikivity/scylla,raphaelsc/scylla,capturePointer/scylla,victorbriz/scylla,duarten/scylla,capturePointer/scylla,glommer/scylla