Обсуждение: Inserting Null Value or String Value
Hi,
I am trying to insert a date into a date field, but also sometimes I need to insert a null value. Inserting the null value seems to require not using quotes around null, but if I try to enter a date without quotes around it, it thinks it is a number.
Here is the error I get: Warning: PostgreSQL query failed: ERROR: column "spec_start_date" is of type 'date' but expression is of type 'integer' You will need to rewrite or cast the expression
The value I am sending is: spec_start_date = 10/01/02
If I surround the date with single quotes it should be fine, but I can't do that when I want to insert a null value. I know that I can do an "IF <use quotes> ELSE <don't use quotes>" in the SQL string, by I am entering many values and this would really get messy. I was hoping that there was a better solution. Thanks for any help.
Sean
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I am trying to insert a date into a date field, but also sometimes I need to insert a null value. Inserting the null value seems to require not using quotes around null, but if I try to enter a date without quotes around it, it thinks it is a number.
Here is the error I get: Warning: PostgreSQL query failed: ERROR: column "spec_start_date" is of type 'date' but expression is of type 'integer' You will need to rewrite or cast the expression
The value I am sending is: spec_start_date = 10/01/02
If I surround the date with single quotes it should be fine, but I can't do that when I want to insert a null value. I know that I can do an "IF <use quotes> ELSE <don't use quotes>" in the SQL string, by I am entering many values and this would really get messy. I was hoping that there was a better solution. Thanks for any help.
If there is a way, I haven't found it yet. But it doesn't have to be messy--simply create a function that does the if-else for you, and your code will stay clean.
Keary Suska
Esoteritech, Inc.
"Leveraging Open Source for a better Internet"
>>>>> "Keary" == Keary Suska <hierophant@pcisys.net> writes:
Keary> If I surround the date with single quotes it should be
Keary> fine, but I can't do that when I want to insert a null
Keary> value. I know that I can do an "IF <use quotes> ELSE
Keary> <don't use quotes>" in the SQL string, by I am entering
Keary> many values and this would really get messy. I was hoping
Keary> that there was a better solution. Thanks for any help.
Why is this too difficult? You *are* doing some sort of input
validation before you send the data to posgres aren't you?
roland
--
PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD RL Enterprises
roland@rlenter.com 76-15 113th Street, Apt 3B
roland@astrofoto.org Forest Hills, NY 11375
* Keary Suska <hierophant@pcisys.net> [01 10 02 19:37]:
>on 10/1/02 10:54 AM, dcmkx10@yahoo.com purportedly said:
>
>I am trying to insert a date into a date field, but also sometimes I need to
>insert a null value. Inserting the null value seems to require not using
>quotes around null, but if I try to enter a date without quotes around it,
>it thinks it is a number.
>
>Here is the error I get: Warning: PostgreSQL query failed: ERROR: column
>"spec_start_date" is of type 'date' but expression is of type 'integer' You
>will need to rewrite or cast the expression
>
>If I surround the date with single quotes it should be fine, but I can't do
>that when I want to insert a null value. I know that I can do an "IF <use
>quotes> ELSE <don't use quotes>" in the SQL string, by I am entering many
>values and this would really get messy. I was hoping that there was a better
>solution. Thanks for any help.
>
>If there is a way, I haven't found it yet. But it doesn't have to be
>messy--simply create a function that does the if-else for you, and your code
>will stay clean.
Maybe you should do the following. At the point where the switch
"date" or "NULL" in the php-file is:
if(empty($form_date)){
$date_var = NULL;
}else $date_var = "'$date'";
$query = "INSERT INTO table (table_row1, date)
VALUES ('$value1', $date_var);";
You still have the if/else, but I think there must be somewhere the
switch NULL <=> date
--
Eckhard Höffner
e-hoeffner@fifoost.org
D-80331 München
Tel. +49-89-21 03 18 88
Hi Sean,
see below!
2002. október 1. 18:54 dátummal test test ezt írta:
| Hi,
|
| I am trying to insert a date into a date field, but also sometimes I
| need to insert a null value. Inserting the null value seems to
| require not using quotes around null, but if I try to enter a date
| without quotes around it, it thinks it is a number.
|
| Here is the error I get: Warning: PostgreSQL query failed: ERROR:
| column "spec_start_date" is of type 'date' but expression is of type
| 'integer' You will need to rewrite or cast the expression
|
| The value I am sending is: spec_start_date = 10/01/02
|
| If I surround the date with single quotes it should be fine, but I
| can't do that when I want to insert a null value. I know that I can
| do an "IF <use quotes> ELSE <don't use quotes>" in the SQL string, by
| I am entering many values and this would really get messy. I was
| hoping that there was a better solution. Thanks for any help.
|
| Sean
|
Beware crude hack is coming!!!
I wrote a fairly plain function which does the dirty quoting to any
kind of values to be inserted. It looks like:
function quote($var, $type, $empty_null = TRUE)
{
if ( empty($var) && $empty_null ){
return 'NULL';
}
// if type is prepended with _ it means "array of ..."
if ( $type{0} == '_' ){
$type = substr($type, 1);
$temp = "'{";
foreach ( $var as $item ){
$temp .= quote($item, $type).','; // recursive call
}
$temp = substr($temp, 0, -1);
return $temp ."}'";
}
switch ( $type ){
case 'int':
return intval($var);
case 'bool':
return ($var ? "'t'::bool": "'f'::bool");
case 'date':
if ( is_numeric($var) ) { // treats as timestamp integer
return date("'Y-m-d'", $var);
}
// otherwise as a date string
case 'text':
if (!get_magic_quotes_gpc()) {
$var = addslashes($var);
}
return '\''.$var.'\'';
default: trigger_error("unknown type : $type ($value)", E_USER_ERROR);
}
}
You must notice that $var holds the corresponding value to be inserted
or not set (in this case the function returns with NULL), $type is
neither a legal type from PHP nor from Postgresql, but I think you can
figure out how it works.
In my app, I have a PHP array which keeps information about what fields
needs to be inserted and what type these fields have.
$PROPERTIES = array (
'seatnum' => 'int',
'myear' => 'int',
'kmage' => 'int',
'price' => 'int',
'volume' => 'int',
'power' => 'int',
'pprpm' => 'int',
'color' => 'text',
'damaged' => 'bool',
'condition' => 'int',
'ownernum' => 'int',
'regvalid' => 'text',
'cylindernum' => 'int',
'cylinderarr' => 'int',
'gearnum' => 'int',
'gearing' => 'int',
'autoclutch' => 'bool',
'truss' => 'int',
'trussmaterial' => 'int',
'frontbreak' => 'int',
'rarebreak' => 'int',
'accessories' => '_int',
'notes' => 'text'
);
finally I have to loop through this array and simply calls quote to
quote the posted variables.
hth,
--
Papp, Győző
- pgerzson@freestart.hu
Actually, this does not work, it generates the SQL fine, but I get a Parse error when trying to insert it. I am doing something very similar, did I mess up somewhere.
Here is the PHP:
if ($special_start_date == '')
{$special_start_date = 'null';}
else {$special_start_date = "'$special_start_date'";}
if ($special_end_date == '')
{$special_end_date = 'null';}
else {$special_end_date = "'$special_end_date'";}
$sql = "INSERT INTO prod_opt (
xref_prod_id,
code,
title,
isbn,
list_price,
our_price,
spec_price,
spec_start_date,
spec_end_date,
quantity,
clearance,
priority)
VALUES (
'".$prod_id."',
'".$item_code."',
'".$option_format."',
'".$isbn."',
".$list_price.",
".$our_price.",
".$special_price.",
".$special_start_date.",
".$special_end_date.",
".$qty.",
'".$clearance."',
".$priority.")";
$result = pg_exec($dbh, $sql);
This is the error I get: Warning: PostgreSQL query failed: ERROR: parser: parse error at or near "10"
This is the SQL generated: UPDATE prod_opt SET xref_prod_id = '4', code = '2', title = 'test', isbn = '2', list_price = 2, our_price = 2, spec_price = 2, spec_start_date = '10/01/02', spec_end_date = '10/01/02', quantity = 2, clearance = 't', priority = 2 WHERE id = '2'
-Sean
Eckhard Hoeffner wrote:
* Keary Suska [01 10 02 19:37]:
>on 10/1/02 10:54 AM, dcmkx10@yahoo.com purportedly said:
>
>I am trying to insert a date into a date field, but also sometimes I need to
>insert a null value. Inserting the null value seems to require not using
>quotes around null, but if I try to enter a date without quotes around it,
>it thinks it is a number.
>
>Here is the error I get: Warning: PostgreSQL query failed: ERROR: column
>"spec_start_date" is of type 'date' but expression is of type 'integer' You
>will need to rewrite or cast the expression
>
>If I surround the date with single quotes it should be fine, but I can't do
>that when I want to insert a null value. I know that I can do an "IF >quotes> ELSE " in the SQL string, by I am entering many
>values and this would really get messy. I was hoping that there was a better
>solution. Thanks for any help.
>
>If there is a way, I haven't found it yet. But it doesn't have to be
>messy--simply create a function that does the if-else for you, and your code
>will stay clean.
Maybe you should do the following. At the point where the switch
"date" or "NULL" in the php-file is:
if(empty($form_date)){
$date_var = NULL;
}else $date_var = "'$date'";
$query = "INSERT INTO table (table_row1, date)
VALUES ('$value1', $date_var);";
You still have the if/else, but I think there must be somewhere the
switch NULL <=> date
--
Eckhard H�ffner
e-hoeffner@fifoost.org
D-80331 M�nchen
Tel. +49-89-21 03 18 88
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Sorry, I pasted the wrong code. This is the PHP Code for the UPDATE not INSERT:
$sql = "UPDATE prod_opt
SET xref_prod_id = '$prod_id',
code = '$item_code',
title = '$option_format',
isbn = '$isbn',
list_price = $list_price,
our_price = $our_price,
spec_price = $special_price,
spec_start_date = $special_start_date,
spec_end_date = $special_end_date,
quantity = $qty,
clearance = '$clearance',
priority = $priority
WHERE id = '$id'";
$result = pg_exec($dbh, $sql);
Sean wrote:
Actually, this does not work, it generates the SQL fine, but I get a Parse error when trying to insert it. I am doing something very similar, did I mess up somewhere.
Here is the PHP:
if ($special_start_date == '')
{$special_start_date = 'null';}
else {$special_start_date = "'$special_start_date'";}if ($special_end_date == '')
{$special_end_date = 'null';}
else {$special_end_date = "'$special_end_date'";}$sql = "INSERT INTO prod_opt (
xref_prod_id,
code,
title,
isbn,
list_price,
our_price,
spec_price,
spec_start_date,
spec_end_date,
quantity,
clearance,
priority)
VALUES (
'".$prod_id."',
'".$item_code."',
'".$option_format."',
'".$isbn."',
".$list_price.",
".$our_price.",
".$special_price.",
".$special_start_date.",
".$special_end_date.",
".$qty.",
'".$clearance."',
".$priority.")";
$result = pg_exec($dbh, $sql);This is the error I get: Warning: PostgreSQL query failed: ERROR: parser: parse error at or near "10"
This is the SQL generated: UPDATE prod_opt SET xref_prod_id = '4', code = '2', title = 'test', isbn = '2', list_price = 2, our_price = 2, spec_price = 2, spec_start_date = '10/01/02', spec_end_date = '10/01/02', quantity = 2, clearance = 't', priority = 2 WHERE id = '2'
-Sean
Eckhard Hoeffner wrote:
* Keary Suska [01 10 02 19:37]:
>on 10/1/02 10:54 AM, dcmkx10@yahoo.com purportedly said:
>
>I am trying to insert a date into a date field, but also sometimes I need to
>insert a null value. Inserting the null value seems to require not using
>quotes around null, but if I try to enter a date without quotes around it,
>it thinks it is a number.
>
>Here is the error I get: Warning: PostgreSQL query failed: ERROR: column
>"spec_start_date" is of type 'date' but expression is of type 'integer' You
>will need to rewrite or cast the expression
>
>If I surround the date with single quotes it should be fine, but I can't do
>that when I want to insert a null value. I know that I can do an "IF >quotes> ELSE " in the SQL string, by I am entering many
>values and this would really get messy. I was hoping that there was a better
>solution. Thanks for any help.
>
>If there is a way, I haven't found it yet. But it doesn't have to be
>messy--simply create a function that does the if-else for you, and your code
>will stay clean.
Maybe you should do the following. At the point where the switch
"date" or "NULL" in the php-file is:
if(empty($form_date)){
$date_var = NULL;
}else $date_var = "'$date'";
$query = "INSERT INTO table (table_row1, date)
VALUES ('$value1', $date_var);";
You still have the if/else, but I think there must be somewhere the
switch NULL <=> date
--
Eckhard H�ffner
e-hoeffner@fifoost.org
D-80331 M�nchen
Tel. +49-89-21 03 18 88
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http://archives.postgresql.org
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on 10/1/02 1:20 PM, dcmkx10@yahoo.com purportedly said: > This is the SQL generated: UPDATE prod_opt SET xref_prod_id = '4', code = '2', > title = 'test', isbn = '2', list_price = 2, our_price = 2, spec_price = 2, > spec_start_date = '10/01/02', spec_end_date = '10/01/02', quantity = 2, > clearance = 't', priority = 2 WHERE id = '2' > > This is the error I get: Warning: PostgreSQL query failed: ERROR: parser: > parse error at or near "10" I wouldn't expect that error message, but unless you have changed your date preferences the date format being used is invalid. By default, you must use SQl formatted dates, e.g. 2002-10-01 Keary Suska Esoteritech, Inc. "Leveraging Open Source for a better Internet"