Re: Max length of SQL statement

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Carmen Wai" <wai_carmen(at)hotmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Max length of SQL statement
Date: 2003-12-28 16:30:03
Message-ID: 18412.1072629003@sss.pgh.pa.us
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"Carmen Wai" <wai_carmen(at)hotmail(dot)com> writes:
> Do any one know the max length of a SQL statement?

There is no specific limit; it'll depend on available memory and
complexity of the statement. I've run tests with multi-megabyte
string literals, tens of thousands of WHERE clauses, etc.

MySQL's "crashme" test program attempts to discover the maximum length
of a SQL statement in the tested database. The last time I tried it,
I was highly amused to watch the test program run out of memory and dump
core before Postgres did. (This was a couple years back, so maybe
they've fixed their problem by now.)

regards, tom lane

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