At the moment I have the following function:
(defn do-show-table
[table]
(doseq [{:keys [table_name]} (show-tables db-spec)]
(when (= (lower-case table) (lower-case table_name))
(let [format "%-20s %-30s %-5s %-5s %-20s\n"]
(printf format "Field" "Type" "Null?" "Key" "Default")
(doseq [{:keys [field type null key default]}
(jdbc/query db-spec [(str "SHOW COLUMNS FROM "
table)])]
(printf format field type null key default))))))
In this case it is not very important, because the outer sequence will not
be very big. But I would like to leave the doseq at the moment that the
when is executed. It will be done 0 or 1 times, so after it is done, there
is no use in continuing the sequence walk.
The second part is that I would like to do an action if it is done 0 times
after the doseq. Is this possible?
--
Cecil Westerhof
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