如何从Java的ResultSet中按别名/标签获取列？

Question

Suppose I have a SP which does SELECT a as b FROM example_table at the end.

When I do

// Some magical code goes here
ResultSet rs = callableStatement.executeQuery();
while(rs.next()) {
    System.out.printLn(rs.getString("b"));
}
// Some magical code goes here

I get an error telling me that the column does not exist, however when I change my code for rs.getString("a") , It will execute correctly. This seems to be because the getString(String) fetches for the column by its name, not by its alias/label.

How can I tell the ResultSet to fetch the column by label/alias, not by its name.

PS: I found a similar question here.

Answer 1

@Alper was on the money.

They changed the driver and added a connection property GET_COLUMN_LABEL_FOR_NAME that you need to set to "true". I thought it was only for resultSetMetaData, but apparently not so much...

It's bizarre, but try it.

Reference in Sybooks

Sybase Newsgroup Article

Answer 2

I don't know if it is related but in MySQL there is a similar problem which you can avert by adding ?useOldAliasMetadataBehavior=true to the end of the connection string. Check this link for details

The link of an official explanation for the same case : Here it says, until the version 5.0.x the default value was set to true but after the version 5.1 the default value was set false . You can also check the other parameters for the configuration string here