Question

我正在开发一个SQL脚本，它将存储在S3存储桶中的.csv文件加载到RDS DB中。不使用LOAD时，CONCAT命令可以完美地工作。我正在使用CONCAT在语句中包含变量。我认为问题在于一个或多个条款。我大大缩短了字段以进行故障排除。我尝试了几种不同的方法，但似乎无法获得正确的语法。

set @s3intotemp = CONCAT('
LOAD DATA FROM S3 PREFIX "`',@workingdir, '`"
INTO TABLE `',@rndtable, '` 
FIELDS TERMINATED BY ","
ESCAPED BY ""
ENCLOSED BY "\""
LINES TERMINATED BY "\n"
(@col1,
@col2) 
SET customer=@col1,
firstname=@col2;
');
PREPARE stmt from @s3intotemp;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

我收到以下错误：

SQL错误：您的SQL语法有错误。检查手册对应于您的MySQL服务器版本以使用正确的语法行附近'“（@ col1，@ col2）设置客户= @ col1，名字= @ col2' 6

Answer 1

您需要对字符串中的反斜杠进行转义，以使它们进入串联的结果。

set @s3intotemp = CONCAT('
LOAD DATA FROM S3 PREFIX "`',@workingdir, '`"
INTO TABLE `',@rndtable, '` 
FIELDS TERMINATED BY ","
ESCAPED BY ""
ENCLOSED BY "\\\""
LINES TERMINATED BY "\\n"
(@col1,
@col2) 
SET customer=@col1,
firstname=@col2;
');

加载数据时出现MySQL CONCAT错误

1 个答案: