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Bug #17908 Can't retrieve info using OCIColumnIsNULL()
Submitted: 2002-06-21 14:20 UTC Modified: 2003-10-19 10:24 UTC
Votes:1
Avg. Score:1.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: ThorpeJ at gao dot gov Assigned: maxim (profile)
Status: No Feedback Package: OCI8 related
PHP Version: 4.0CVS-2002-06-21 OS: Linux 7.1
Private report: No CVE-ID: None
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From: ThorpeJ at gao dot gov
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 [2002-06-21 14:20 UTC] ThorpeJ at gao dot gov
I've tried using OCIColumnIsNULL() to retrieve info on which fields were NULL/NOT NULL in an Oracle database table, and the function did not return anything (using OCIColumnName, OCIColumnType, and OCIColumnSize in the same program worked fine). The script below is a simple example:

/******************************************************/
$conn = OCILogon($user, $pwd, $db);
$stmt = OCIParse($conn, "select * from $table");
OCIExecute($stmt);
$ncols = OCINumCols($stmt);
for ( $i = 1; $i <= $ncols; $i++ ) {
  echo "NAME: " . OCIColumnName($stmt,$i) . "<BR>";
  echo "TYPE: " . OCIColumnType($stmt,$i) . "<BR>";
  echo "SIZE: " . OCIColumnSize($stmt,$i) . "<BR>";
  echo "ISNULL: " . OCIColumnIsNULL($stmt,$i) . "<P>"; //Function does not return any information
}
/******************************************************/

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 [2002-10-20 15:33 UTC] maxim@php.net
true,

actually, what i noticed is that if you do a fetch *before* calling OCIColumnIsNULL() you then get the right results.

/******************************************************/
$conn = OCILogon($user, $pwd, $db);
$stmt = OCIParse($conn, "select * from $table");
OCIExecute($stmt);
$nrows = OCIFetchStatement($stmt, $res);  // adding this
$ncols = OCINumCols($stmt);
for ( $i = 1; $i <= $ncols; $i++ ) {
  echo "NAME: " . OCIColumnName($stmt,$i) . "<BR>";
  echo "TYPE: " . OCIColumnType($stmt,$i) . "<BR>";
  echo "SIZE: " . OCIColumnSize($stmt,$i) . "<BR>";
  echo "ISNULL: " . OCIColumnIsNULL($stmt,$i) . "<P>"; //Function does
not return any information
}
/******************************************************/

Will go to fix that.
 [2003-10-19 10:24 UTC] sniper@php.net
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