我在 postgres 函数中使用这些语句。
Select count(*) into V_check
from employee
where employee_name like 'Raj%';
if V_check == 0
then
update exception set exception_found = 'Raj';
end if;
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我收到此错误:
Run Code Online (Sandbox Code Playgroud)ERROR: operator does not exist: integer == integer LINE 1: SELECT V_check == 0
athena 中的 MD5 哈希函数不适用于字符串。但是,雅典娜的文档表明确实如此:https ://docs.aws.amazon.com/redshift/latest/dg/r_MD5.html
不知道我在这里缺少什么。如果我将 varchar 转换为 varbinary,则生成的哈希值不正确。
收到此错误:
SYNTAX_ERROR: line 1:8: Unexpected parameters (varchar(15)) for function md5. Expected: md5(varbinary)
This query ran against the "temp" database, unless qualified by the query. Please post the error message on our forum or contact customer support with Query Id: dd959e8a-7fa4-4170-8895-ce7cf58be6ea.```
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