Re: SQL Statement size limit?

What could cut your sql statements in half?
Well, funny you should mention that...
The SQL Reference manual, Appendix A, 'Maximum length of an SQL statement'
value lists the limit at V5R4 and V6R1 as 2,097,152 bytes. Run SQL Scripts
uses the IBM Toolbox for Java JDBC driver which sends all SQL statement
text to the host in UCS-2 (CCSID 13488) which uses 2 bytes to represent
each character. So the effective limit in characters will be one half the
limit in bytes, or 1,048,576 characters.


http://www-912.ibm.com/s_dir/SLKBase.nsf/1ac66549a21402188625680b0002037e/cf718297a375333f86257457005d723c?OpenDocument

For subselect limits and how you may reach them when you didn't think you
would, check out

http://publib.boulder.ibm.com/infocenter/wpdoc/v6r0/index.jsp?topic=/com.ibm.wp.exp.doc/wps/tbl_pdm.html
searching for sql0101


Rob Berendt
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http://www.dekko.com





From: Charles Wilt <charles.wilt@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>,
Date: 04/18/2013 11:28 AM
Subject: Re: SQL Statement size limit?
Sent by: midrange-l-bounces@xxxxxxxxxxxx



Well as I said, I believe that this is coming through JDBC (but I'm
checking on that :)

It also appears that a SQL0101 is being thrown...

SQL0101 Message Text: SQL statement too long or complex. Cause Text: The
SQL statement is longer than the limit allowed for length or complexity.
The reason code is &1. One of the following reason codes indicates the
error:

- 1 - The total number of subselects combined using UNION, EXCEPT, and
INTERSECT is greater than 256.
- 2 - The total number of columns, constants, and operators is greater
than the SQL limits.
- 3 - The sum of the lengths of the non-LOB columns in a select list,
table, view definition, or user defined table function is greater than
32766 or the definition contains a LOB and the sum of the lengths
specified
on the ALLOCATE clause for varying-length fields and the non-varying
field
lengths is greater than 32740. The maximum length is reduced if any of
the
columns are varying-length or allow null values.
- 4 - The total number of subselects referenced in an outer subselect
is
greater than 256.
- 5 - The total length of the statement text is greater than 2097152,
or
the total length of the prepare attribute string text is greater than
65535.
- 6 - The relative position value specified on the FETCH statement is
outside the range of valid values.
- 7 - A system name could not be generated.

Recovery Text: Simplify the statement or divide the statement up into
more
than one statement and try the request again. For reason code 7, specify a
different name for the table, view, index, or alias. SQLCODE or SQLCODEs:
-101
SQLSTATE or SQLSTATEs: 54001, 54010, 54011


But I'm basing that on the message text, "SQL statement too long or
complex."
I was shown from the client side log. I haven't seen the actual joblog
message with reason code.

I'd assume it would be reason 7.

But now I've got a third limit... 64KB.

The client side log showed the statement being cut off at 32K...but that
could have just been a limitation of the logging.

Charles



On Thu, Apr 18, 2013 at 10:51 AM, Birgitta Hauser
<Hauser@xxxxxxxxxxxxxxx>wrote:

AFAIK - 2MB in SQL Scripts / in embedded SQL - 32 K?

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars."

(Les

Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training

them

and keeping them!"

-----Ursprüngliche Nachricht-----
Von: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] Im Auftrag von Charles Wilt
Gesendet: Thursday, 18.4 2013 16:41
An: Midrange Systems Technical Discussion
Betreff: SQL Statement size limit?

All,

Does anybody know what the SQL statement size limit for the iSeries is

at

v5r4?

I found this:

http://publib.boulder.ibm.com/infocenter/iseries/v5r4/topic/rzaik/exitpointt

able1.htm

which shows a max statement size of 32K

But this

http://publib.boulder.ibm.com/infocenter/iseries/v5r4/topic/db2/rbafzmstlimt

abs.htm

says
Maximum length of an SQL statement (in bytes) 2 097 152

Bit of a difference between 32KB and 2MB :)

Lastly, does the JDBC have some other limit?

Thanks!
Charles
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