JDBC使用Clojure的

Question

提到以下鏈接https://my.vertica.com/docs/6.0.x/HTML/index.htm#14874.htm當執行錯誤，我們可以使用

boolean result = stmt.execute("COPY customers FROM " 
          + " '/data/customers.txt' DIRECT ENFORCELENGTH"); 

但它不Clojure中工作

(clojure.java.jdbc/execute! vertica-db "copy customer1.stage_test_etl_195 from '/tmp/valid-197.csv' DELIMITER '|' DIRECT ENFORCELENGTH ") 

ClassCastException java.lang.Character cannot be cast to java.lang.String clojure.java.jdbc/prepare-statement (jdbc.clj:457) 

Answer 1

有clojure.jdbc文檔仔細閱讀。第二個參數執行！應該是第一個元素是SQL和其他（可選）參數的矢量。下面可能工作

(clojure.java.jdbc/execute! vertica-db ["copy customer1.stage_test_etl_195 from '/tmp/valid-197.csv' DELIMITER '|' DIRECT ENFORCELENGTH "]) 

假設是對DB後端法律聲明