[ http://issues.apache.org/jira/browse/DDLUTILS-54?page=all ]
Thomas Dudziak updated DDLUTILS-54:
-----------------------------------
Component: Core (No specific database)
> Column comparison does not check on native types
> ------------------------------------------------
>
> Key: DDLUTILS-54
> URL: http://issues.apache.org/jira/browse/DDLUTILS-54
> Project: DdlUtils
> Type: Bug
> Components: Core (No specific database)
> Reporter: Konstantinos Stathatos
> Assignee: Thomas Dudziak
> Priority: Minor
> Fix For: 1.0
> Attachments: derby_test.xml, svndiff, zementis_tests.ant
>
> The attached Ant script creates a table (in Derby) and then tries to alter
> it, using the same database description. I would expect the DdlUtils would
> not try to modify anything as the database has not changed.
> However, the database defines a BOOLEAN column and a FLOAT column which in a
> Derby are mapped to a SMALLINT column and a DOUBLE column. With such a
> mapping, next time the columns are compared DdlUtils finds them different
> since the type codes are different. As a result, it tries to modify the
> columns even though the modification is not necessary.
> Generally, such modification is really harmless. However, under my
> particular use case, occasionally a DBA would have to get involved and
> manually update the database if modifications are needed (i.e. if a non-empty
> alter sql is generated). This means that taking the extra step to check
> based on the native types if the modifications are material or not would be
> important.
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