Re: [MonetDB-users] DROP TABLE IF EXISTS <table>;

I stumbled upon this on google: IF EXISTS(SELECT 1 FROM sys.objects WHERE OBJECT_ID = OBJECT_ID(N'table_to_drop') AND type = (N'U')) DROP TABLE table_to_drop I believe it's an extension. Mike On Thu, Mar 31, 2011 at 2:05 PM, wrote:

On Thu, Mar 31, 2011 at 01:28:57PM +0300, Michael Sioutis wrote:

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Well yes, actually I don't want to deal with an SQLException in my code. Having an SQL query (SELECT name FROM tables WHERE name like 'table_I_want_to_drop';) to see if the table is there as Fabian suggested and then move on to dropping it if it exists by checking the results of the query, works for me.

Good. ;-)

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I was trying to find out if there is a single SQL query that would do that like for example in Ms SQL, but reading a bit the documentation of MonetDB I couldn't come up with sth.

What does such a Ms SQL query look like? And is that SQL:2003 standard or a proprietary Ms SQL extensions?

Stefan

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Mike

On Wed, Mar 30, 2011 at 4:55 PM, Stefan de Konink wrote:

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Because somepeople have scripts that clean up, and dont want these parts to run outside a transaction?

Stefan

Op 30 mrt 2011 om 15:53 heeft Stefan.Manegold@cwi.nl het volgende geschreven:\

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Mike,

may I ask why you want to drop a table that does not exist?

Stefan

On Wed, Mar 30, 2011 at 04:41:15PM +0300, Michael Sioutis wrote:

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Hello,

I want to prevent an SQLException from occurring for tables that do not exist in my database. For example: sql>DROP TABLE "locked"; SQLException:sql.catalog:DROP TABLE: no such table 'locked'

It seems (and is documented) that there is no such thing like "IF EXISTS" in MonetDB. Is there a way to circumvent the SQLException?

Mike

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