Field Number Limitation into MySQL

[cover]

Is there a restriction to the number of fields you can work with in a
PHP to MySQL connection? I'd used as many as 15 quite a few times and
now I have a form with 34 fields and can't seem to get the info
inserted into the table even though I'm not getting any connection
errors, etc. Since my method is identical, I'm wondering if there's
some 'rule' I am unaware of. TIA

[Mara Guida]

cover wrote:

Is there a restriction to the number of fields you can work with in a
PHP to MySQL connection? I'd used as many as 15 quite a few times and
now I have a form with 34 fields and can't seem to get the info
inserted into the table even though I'm not getting any connection
errors, etc. Since my method is identical, I'm wondering if there's
some 'rule' I am unaware of. TIA

GET vs POST? See the thread titled "Memory Limit for for HTML pages??"

[Oli Filth]

Mara Guida said the following on 11/12/2005 17:31:

cover wrote:

Is there a restriction to the number of fields you can work with in a
PHP to MySQL connection? I'd used as many as 15 quite a few times and
now I have a form with 34 fields and can't seem to get the info
inserted into the table even though I'm not getting any connection
errors, etc. Since my method is identical, I'm wondering if there's
some 'rule' I am unaware of. TIA

Just tried a 34-field insert; it worked fine.

What is your query string?



GET vs POST? See the thread titled "Memory Limit for for HTML pages??"

This is completely unrelated.

--
Oli

[Chuck Anderson]

cover wrote:

Is there a restriction to the number of fields you can work with in a
PHP to MySQL connection? I'd used as many as 15 quite a few times and
now I have a form with 34 fields and can't seem to get the info
inserted into the table even though I'm not getting any connection
errors, etc. Since my method is identical, I'm wondering if there's
some 'rule' I am unaware of. TIA

Put - echo mysql_error(); - right after your query.

--
*************** **************
Chuck Anderson • Boulder, CO
http://www.CycleTourist.com
Integrity is obvious.
The lack of it is common.
*************** **************

[Toby Inkster]

cover wrote:

Is there a restriction to the number of fields you can work with in a
PHP to MySQL connection?

Do you mean a limit to the number of columns that a table can contain in
MySQL?

http://www-css.fnal.gov/dsg/external...-vs-pgsql.html

| MySQL: Maximum number of columns in one table - 3398

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

[cover]

On Sun, 11 Dec 2005 18:15:52 GMT, Oli Filth <ca***@olifilth .co.uk>
wrote:

Just tried a 34-field insert; it worked fine.
Hmmm. Guess I'll keep looking for an error.

What is your query string?

$sqlquery = "INSERT INTO $table VALUES('$id', '$etype', '$area',
'$equipname', '$jdeno', '$equipno', '$mccloc', '$bspec', '$bsize',
'$bfpm', '$gbmanu', '$lube', '$gbsize', '$gbratio', '$motorsize',
'$motorframe', '$drivesprocket ', '$drivensprocke t', '$chainsize',
'$lacingtype', '$brgtypesize', '$brgqty', '$tbrgtypesize' , '$tbrgqty',
'$headsize', '$hoawidth', '$tailsize', '$toawidth', '$cbsize',
'$keysize' '$uhmwsize', '$convnotes',)" ;

$results = mysql_query($sq lquery);

[cover]

On Sun, 11 Dec 2005 12:11:02 -0700, Chuck Anderson
<we************ @seemy.sig> wrote:

Put - echo mysql_error(); - right after your query.

Thanks, I inserted it as follows:
$results = mysql_query($sq lquery);
echo mysql_error();
mysql_close();

and received the following error :
"Column count doesn't match value count at row 1"

looked at the database again and field lengths were okay to accomodate
variable content - thoughts?

[Chris Hope]

cover wrote:

On Sun, 11 Dec 2005 18:15:52 GMT, Oli Filth <ca***@olifilth .co.uk>
wrote:

Just tried a 34-field insert; it worked fine.

Hmmm. Guess I'll keep looking for an error.

What is your query string?

$sqlquery = "INSERT INTO $table VALUES('$id', '$etype', '$area',
'$equipname', '$jdeno', '$equipno', '$mccloc', '$bspec', '$bsize',
'$bfpm', '$gbmanu', '$lube', '$gbsize', '$gbratio', '$motorsize',
'$motorframe', '$drivesprocket ', '$drivensprocke t', '$chainsize',
'$lacingtype', '$brgtypesize', '$brgqty', '$tbrgtypesize' , '$tbrgqty',
'$headsize', '$hoawidth', '$tailsize', '$toawidth', '$cbsize',
'$keysize' '$uhmwsize', '$convnotes',)" ;

There's a comma before the closing bracket. I would say that's your
error. echo mysql_error() after running the query and see what happens.
Or alternatively echo out the sql string and paste it into the mysql
console or phpMyAdmin etc.

One other thing, where do all those values come from? Directly from the
form with no escaping? If so, you need to read up on the topic of sql
injection.

And one other thing... I personally believe you are better to write your
insert query in the form:

INSERT INTO tablename (fieldname1, fieldname2, ... ) VALUES ('value1',
'value2', ...)

than not specity the fieldnames. Sure, it takes time to write your
query, but if you add a column to the table at a later time you will
break any existing insert queries for that table as the number of
columns specified in your query won't match the number in the table.

--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com

[Chris Hope]

cover wrote:

On Sun, 11 Dec 2005 12:11:02 -0700, Chuck Anderson
<we************ @seemy.sig> wrote:

Put - echo mysql_error(); - right after your query.

Thanks, I inserted it as follows:
$results = mysql_query($sq lquery);
echo mysql_error();
mysql_close();

and received the following error :
"Column count doesn't match value count at row 1"

looked at the database again and field lengths were okay to accomodate
variable content - thoughts?

It means you have eg 35 columns in your database but your sql string
only has values for 34 of them. See the other message I just posted a
couple of minutes ago.

--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com

[cover]

On Mon, 12 Dec 2005 10:20:59 +1300, Chris Hope
<bl*******@elec trictoolbox.com > wrote:

There's a comma before the closing bracket. I would say that's your
error. echo mysql_error() after running the query and see what happens.
Or alternatively echo out the sql string and paste it into the mysql
console or phpMyAdmin etc.
caught the comma after installing the echo mysql_error(); line and now
have:
"You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'x 2" x .25', 'no notes')' at line 1" unless I remove the
measurements from the uhmwsize field which were 60' x 2" x .25"*

after blanking that field, the error came back to a more simple
"Column count doesn't match value count at row 1" which now makes me
wonder... Setting id as an integer when establishing the database,
what numerical entry should I enter into that?
One other thing, where do all those values come from? Directly from the
form with no escaping? If so, you need to read up on the topic of sql
injection.
I use two forms to enter the data and until now, it's worked very well
(so far with fields of 12 or less). One form is the user input, the
second does the query and insert while echoing the values to the
screen of what the user just entered into the database.
And one other thing... I personally believe you are better to write your
insert query in the form:

INSERT INTO tablename (fieldname1, fieldname2, ... ) VALUES ('value1',
'value2', ...)
I've done it this way too - kind of got away from it which may have
been bad however, went back to it for this error solving and it made
no difference in the outcome or error.

than not specity the fieldnames. Sure, it takes time to write your
query, but if you add a column to the table at a later time you will
break any existing insert queries for that table as the number of
columns specified in your query won't match the number in the table.