如何在Ruby/Rails中使用load命令和MySQL？

Question

在MySQL中，我可以運行：

LOAD DATA LOCAL INFILE "/home/pt/test/bal.csv" INTO TABLE bal FIELDS 
TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '"' IGNORE 1 
LINES; 

然而，在我的Ruby程序：

str="LOAD DATA LOCAL INFILE "/home/pt/test/bal.csv" INTO TABLE bal 
FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '"' 
IGNORE 1 LINES;" 

puts str 

dbh.query(str) 

輸出是：

LOAD DATA LOCAL INFILE "/home/pt/test/bal.csv" INTO TABLE bal FIELDS 
TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '"' IGNORE 1 
LINES; 

/home/pt/test/ptb.rb:34:in `query': Field separator argument is not what 
is expected; check the manual (Mysql::Error) 
from /home/pt/test/ptb.rb:34:in `<main>' 

有什麼不對的代碼？

Answer 1

在ENCLOSED BY ' \"'

str="LOAD DATA LOCAL INFILE \"/home/pt/test/bal.csv\" INTO TABLE bal FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n' IGNORE 1 LINES;" 

刪除空格您還可以找到有用的%Q[]Ruby syntax。它的""模擬，但你不需要逃避"裏面的字符串：

str=%Q[LOAD DATA LOCAL INFILE "/home/pt/test/bal.csv" INTO TABLE bal FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 LINES;]