Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I need to find candidate keys of a table. As for a column to be a candidate key,
it must be (1) NOT NULL and (2) UNIQUE. So what I am doing is:
for(i=1;i<colcount; i++){
if( (resultset.getmetadata().isnullable(i)==0) && (UNIQUE_COND) ){
// IS A CANDIDATE KEY
}
}
How can I check for UNIQUE condition? I am using mysql db through JDBC.
Is there another way to get candidate keys?
Thanks.
You need to use the
DatabaseMetaData, not the metadata of the resultset. Specifically you need to look at:uniqueset to true.