Error : "Too many tables names"

Posted on 2001-08-23
Last Modified: 2007-11-27
Hi all,
 Here is my problem : we use Business Objects with data on SQL Server 6.5

Sometimes,users need to ask server to perform "big" queries with something like 18 tables names. In such case here is the error message they get :

[Microsoft][ODBC SQL Server Driver][SQL Server]Too many table names in the query.  The maximum allowable is 16. 106

My DBA is away for few days, so does anyboy here knows how to increase this limitation of 16 table names ?


Note : points will be upgraded up to 200 pts for full working answer in less than 1 hour. :-)

Question by:gklux
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 2
  • +1

Expert Comment

ID: 6417423
Try to divide the large search into 2 nested searches.
If it is realized in the stored procedure, it Try to divide into 2 nested procedures.

Author Comment

ID: 6417553
kdq2000 :
 First of all, thank for interesting in my question.
I cannot accept your answer, because what I need is to know how can I upgrade the limitation. If I do what you say, it means that each time a user make a big query, I will have to do this specially for his report. It's not the goal.



LVL 18

Expert Comment

ID: 6417659
Afraid there is no way.
You would normally just change the SP to use an intermediate temp table but if you give the client app control of the database structure then I don't think there is a lot you can do.
Edgartown IT Case Study

Learn about Edgartown's quest to ensure the safety and security of the entire town's employee and citizen data. Read the case study!


Expert Comment

ID: 6417723
It's not about control of the database structure.  SQL Server is set up to be able to allocate only so much memory for database queries.  Having too many tables in the queries pushes this past the allowable limit, which could easily crash the entire program, so checks were put in to forbid this from happening.  It's not about having a longer wait, it's about the the db not crashing.  There is no way around this, especially in the older languages like 6.5, which didn't allow for a whole lot of user control.

If you don't want to break up the query into separate parts, the only way to do what you want is to use views.  If you know that the query will only target certain fields in the tables, create some views that each hold five or six of those fields.  Then run your database query against those views rather than against the base tables.  That might free up enough memory to let it work.

Expert Comment

ID: 6420761
If it would be possible to look at query, it is possible precisely to define(determine) paths of an output(exit) from the usual situation.

Author Comment

ID: 6430913
Hi all,
  I've found this in the Help file while looking ont he select statement syntax:

SELECT [ALL | DISTINCT] select_list
[INTO [new_table_name]
[FROM table_name [, table_name2 [?, table_name16]]
[WHERE clause]
[GROUP BY clause]
[HAVING clause]
[ORDER BY clause]
[COMPUTE clause]

It seems that this is a syntax restriction. does anybody knows if this restriction exists in SQL Server 7 ? And what about SQL server 2000 ?

LVL 18

Expert Comment

ID: 6431207
v7 can have 256 tables.

Author Comment

ID: 6441133
nigelrivett : are you sure of this ?

LVL 18

Accepted Solution

nigelrivett earned 100 total points
ID: 6441308
this works for @i = 255 - fails for @i = 256 with

Too many table names in the query. The maximum allowable is 256.

set nocount on
declare @cmd varchar(8000)
select @cmd = 'select 1 from sysobjects'
declare @i int
select @i = 255
while @i > 0
   select @cmd = @cmd + ',sysobjects s' + convert(varchar(10),@i)
   select @i = @i - 1
select @cmd = @cmd + ' where 1 = 0'
exec (@cmd)

Author Comment

ID: 6443739


Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
SqlServer Table Triggers 3 28
MSSQL join different row from other table 14 66
SCOM to SQL port 14xx failed? 1 31
SQL Syntax 6 29
When you hear the word proxy, you may become apprehensive. This article will help you to understand Proxy and when it is useful. Let's talk Proxy for SQL Server. (Not in terms of Internet access.) Typically, you'll run into this type of problem w…
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Viewers will learn how to use the INSERT statement to insert data into their tables. It will also introduce the NULL statement, to show them what happens when no value is giving for any given column.
Viewers will learn how to use the SELECT statement in SQL to return specific rows and columns, with various degrees of sorting and limits in place.

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question