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https://issues.apache.org/jira/browse/DERBY-2605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12493533
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Rick Hillegas commented on DERBY-2605:
--------------------------------------
That sounds like a reasonable approach to me. It may turn out that the checks
are in the parser right now. What you're proposing may have to happen at bind()
time.
> You can create BOOLEAN columns in 10.3
> --------------------------------------
>
> Key: DERBY-2605
> URL: https://issues.apache.org/jira/browse/DERBY-2605
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.3.0.0
> Reporter: Rick Hillegas
>
> The work on DERBY-64 seems to have opened up a wormhole by which you can
> create user tables with BOOLEAN columns. The following script shows how to do
> this:
> drop table foo;
> create table foo
> as select systemalias from sys.sysaliases with no data;
> rename column foo.systemalias to boolcol;
> alter table foo
> alter column boolcol null;
> select c.columndatatype
> from sys.syscolumns c, sys.systables t
> where t.tableid=c.referenceid
> and t.tablename='FOO';
> insert into foo( boolcol )
> values
> ( 0 ),
> ( 1 ),
> ( cast (null as int) )
> ;
> select * from foo;
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