Split SqlBuilder.copyData() to allow for copying specific columns
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Key: DDLUTILS-216
URL: https://issues.apache.org/jira/browse/DDLUTILS-216
Project: DdlUtils
Issue Type: Improvement
Components: Core (No specific database)
Affects Versions: 1.0
Reporter: Rick Riemer
Assignee: Thomas Dudziak
Fix For: 1.1
Attachments: split_copy_data.patch
Currently the copyData() method on SqlBuilder is protected and only allows for
copying data between columns with the same name. In some cases (especially
during upgrades) it may be useful to copy the content of one column to another.
As an example: during an upgrade a column may be moved out of a table to
another table. To implement this change it is required to create the new column
in a table, copy the data from the old column to the new column and optionally
drop the old column.
This behavior can easily be achieved by splitting copyData() into a part that
determines the set of columns to copy and a part that actually copies the data
between those columns. If the last part if made into a public method, this also
allows for users to implement their custom table copy changes in combination
with #DDLUTILS-215.
The attached patch implements this behavior. The patch does not break the
existing API.
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