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Support case/when/then/else

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This commit is contained in:
Sean Corfield 2020-10-12 18:38:05 -07:00
parent d1e4e196d0
commit eff3b03a81
1 changed files with 17 additions and 0 deletions
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17
src/honey/sql.cljc
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@ -483,6 +483,23 @@
(into params-x) (into params-x)
(into params-a) (into params-a)
(into params-b)))) (into params-b))))
:case
(fn [_ clauses]
(let [[sqls params]
(reduce (fn [[sqls params] [condition value]]
(let [[sqlc & paramsc] (when-not (= :else condition)
(format-expr condition))
[sqlv & paramsv] (format-expr value)]
[(if (= :else condition)
(conj sqls (sql-kw :else) sqlv)
(conj sqls (sql-kw :when) sqlc (sql-kw :then) sqlv))
(-> params (into paramsc) (into paramsv))]))
[[] []]
(partition 2 clauses))]
(into [(str (sql-kw :case) " "
(str/join " " sqls)
" " (sql-kw :end))]
params)))
:cast :cast
(fn [_ [x type]] (fn [_ [x type]]
(let [[sql & params] (format-expr x) (let [[sql & params] (format-expr x)