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Editorial Team
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Asked: 2026-05-18T00:49:29+00:00

I have a HSQLDB table in which the MAC address is stored as a

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I have a HSQLDB table in which the MAC address is stored as a varchar, which is not quite efficient. I’d like to convert it to BIGINT, but I found no conversion function from VARCHAR hex to BIGINT/INTEGER. I tried to use convert like this: convert(client_mac, BIGINT), but it fails with the first non digit encountered. Does anybody have any idea?

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1 Answer

  1. Editorial Team

    I’ve found myself a solution:

    SELECT  "java.lang.Long.decode"(concat('0x',replace(client_mac,'-',''))),
FROM    user_accounting_sessions_table

    This is kind of an workaround, because the first way that comes into my mind to do it was the following:

    SELECT  "java.lang.Long.parseLong"(replace(client_mac,'-',''),16)
FROM    user_accounting_sessions_table

    But this throws this error:

    java.lang.ArrayIndexOutOfBoundsException: 1
    at org.hsqldb.Function.setArgument(Unknown Source)
    at org.hsqldb.Parser.readTerm(Unknown Source)
    at org.hsqldb.Parser.readFactor(Unknown Source)
    at org.hsqldb.Parser.readSum(Unknown Source)
    at org.hsqldb.Parser.readConcat(Unknown Source)
    at org.hsqldb.Parser.readCondition(Unknown Source)
    at org.hsqldb.Parser.readAnd(Unknown Source)
    at org.hsqldb.Parser.readOr(Unknown Source)
    at org.hsqldb.Parser.parseExpression(Unknown Source)
    at org.hsqldb.Parser.parseSelect(Unknown Source)
    at org.hsqldb.Parser.compileSelectStatement(Unknown Source)
    at org.hsqldb.DatabaseCommandInterpreter.executePart(Unknown Source)
    at org.hsqldb.DatabaseCommandInterpreter.execute(Unknown Source)
    at org.hsqldb.Session.sqlExecuteDirectNoPreChecks(Unknown Source)
    at org.hsqldb.Session.execute(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.fetchResult(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.execute(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.onseven.dbvis.b.B.B.?(Z:2256)
    at com.onseven.dbvis.b.B.F$A.call(Z:2838)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

    It seems that the problem is with the second parameter.
    However, the first one works fine.

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