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https://issues.apache.org/jira/browse/DERBY-4842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920521#action_12920521
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Rick Hillegas commented on DERBY-4842:
--------------------------------------
Thanks for the suggestion, Adrian. The MySQL 6.0 syntax for declaring a table
is this:
CREATE TABLE [IF NOT EXISTS] tableName ...
and the MySQL syntax for removing a table is this:
DROP TABLE [IF EXISTS] tableName ...
These clauses are MySQL extensions which are not part of the ANSI/ISO SQL
Standard. This functionality may be peculiar to MySQL: I can't find anything
similar documented for Postgres, Oracle, or DB2.
> Support "IF [NOT] EXISTS" in CREATE TABLE and "IF EXISTS" in DROP TABLE
> -------------------------------------------------------------------------
>
> Key: DERBY-4842
> URL: https://issues.apache.org/jira/browse/DERBY-4842
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Reporter: Adrian Tarau
>
> It would be really great if Derby will support these additions similar with
> what MySQL has.
> Also a way to disable constraints when dropping the whole database, so you
> would not be forced to put DROPs in such an order that constraints will not
> fail.
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