 PHP : Function Reference : Oracle Functions : ociparse
Examples ( Source code ) » ociparse
<?php
/* oci_fetch_all example mbritton at verinet dot com (990624) */
$conn = oci_connect("scott", "tiger");
$stmt = oci_parse($conn, "select * from emp");
oci_execute($stmt);
$nrows = oci_fetch_all($stmt, $results);
if ($nrows > 0) {
echo "<table border=\"1\">\n";
echo "<tr>\n";
foreach ($results as $key => $val) {
echo "<th>$key</th>\n";
}
echo "</tr>\n";
for ($i = 0; $i < $nrows; $i++) {
echo "<tr>\n";
foreach ($results as $data) {
echo "<td>$data[$i]</td>\n";
}
echo "</tr>\n";
}
echo "</table>\n";
} else {
echo "No data found<br />\n";
}
echo "$nrows Records Selected<br />\n";
oci_free_statement($stmt);
oci_close($conn);
?>
27-jan-2006 12:05
one of the most things that is done wrong with oracle is the following.
Cosider:
-------------------------------------------------------------------
$dbh = ocilogon('user', 'pass', 'db');
for ($i = 0; $i<=10; $i++) {
$sth = ociparse($dbh, 'SELECT * FROM T WHERE x = :x');
ocibindbyname($sth, ':x', $i, -1);
ociexecute($sth, OCI_DEFAULT);
if (ocifetchrow($sth, $row, OCI_ASSOC+OCI_RETURN_NULLS)) {
var_dump($row);
}
}
ocilogoff($dbh);
-------------------------------------------------------------------
Problem here is, that you parse the same statement over and over and that'll cost ressources and will introduce many wait events. This problem will increase exponentially with the number of users using your system. That's one of the things besides not using bind variables that will prevent your application from scaling well.
The right approach:
-------------------------------------------------------------------
$dbh = ocilogon('user', 'pass', 'db');
$sth = ociparse($dbh, 'SELECT * FROM T WHERE x = :x');
for ($i = 0; $i<=10; $i++) {
ocibindbyname($sth, ':x', $i, -1);
ociexecute($sth, OCI_DEFAULT);
if (ocifetchrow($sth, $row, OCI_ASSOC+OCI_RETURN_NULLS)) {
var_dump($row);
}
}
ocilogoff($dbh);
------------------------------------------------------------------
Now we are parsing the statement once and using it as often as possible.
When your using Oracle, create proper indexes, use bind variables and parse once and execute often. Not doing so will get you into trouble when more than a few users are working with your application simultaneously.
steveg
OCIParse() does return errors, try having a mismatched single quote on an insert, in this case OCIParse returned FALSE, and a call to OCIError($connection) returned the message: ORA-01756: quoted string not properly terminated
It does seems that OCIParse doesn't catch a whole lot of stuff tho.
chris_maden
It took me a while to work out the semantics of error handling for the Parse/Fetch/Execute seqeunce as well.
OCIParse always returns true, so testing it is a waste of time. Instead, call OCIError, and test the value of the "code" element.
OCINumRows always returns 1, BTW, so you have to loop. There are a number of other postings on this.
<?php
putenv("ORACLE_SID=admin");
putenv("ORACLE_HOME=/home/oracle");
// Kill the internal messages: this is DIY
error_reporting(0);
$conn = OCILogon("scott", "tiger");
$oerr = OCIError();
if ($oerr) {
if ($oerr["code"] == "1017")
echo "Please check your username and password";
else
echo "Error ".$oerr["message"];
exit;
} else {
echo "Hello";
}
// The table name here should be "emp", not "empxx"
$query = sprintf("select * from empxx");
/* Long version */
// Testing the result of the OCIParse call directly doesn't work...
$stmt = OCIParse($conn, $query);
if (!$stmt) {
$oerr = OCIError($stmt);
echo "Fetch Code 1:".$oerr["message"];
exit;
}
// However, if you test this, it performs as you would hope
$oerr = OCIError($stmt);
echo "Fetch Code 2:".$oerr["code"];
if ($oerr["code"]) {
echo "Error:".$oerr["message"];
exit;
}
// Or, you can catch it here (comment out the above block of code)
if (!OCIExecute($stmt)) {
$oerr = OCIError($stmt);
echo "Execute Code:".$oerr["code"];
if ($oerr["code"]) {
echo "Error:".$oerr["message"];
exit;
}
}
OCIFetch($stmt);
$ncols = OCINumCols($stmt);
$nrows = OCIRowCount($stmt);
printf("Result size is $ncols cols by $nrows rows.
");
for ($i=1; $i<=$ncols; $i++) {
printf("col[%s] = %s type[%d] = %s size[%d] = %s
",
$i, OCIColumnName($stmt, $i),
$i, OCIColumnType($stmt, $i),
$i, OCIColumnSize($stmt, $i));
}
$j=1;
do {
for ($i=1; $i<=$ncols; $i++) {
$col = OCIResult($stmt, $i);
printf("val[%d, %d] = %s * ", $j, $i, $col);
}
printf("
");
$j++;
} while (OCIFetch($stmt));
?>
mwd
if you're using "complex" statements e.g such having calls to build in oracle functions in the select list (as in example below), I did not find any other way as using the "AS <Name>" clause to being able to output the functions outcome using ociresult
example:
ociparse($conn,"select EMPNO, LPAD(' ', 2*(LEVEL-1)) || ENAME AS COMPLETE_FANTASY_NAME, JOB, HIREDATE from scott.emp start with job='MANAGER' connect by PRIOR EMPNO = MGR");
echo ociresult $stmt,"COMPLETE_FANTASY_NAME")." ";
BTW: I also found out by TAE that "COMPLETE_FANATASY_NAME" might not be "complete fantasy" as it has to be all capital letters.
ian
Hey, I did get OCIPARSE to return false. It happened during a session where the previous update had failed.
The SQL for my query was valid, but OCIPARSE returned false to tell me that the query could not be executed because of the previous failure.
kurt
For those that are having trouble with error checking, i have noticed on a lot of sites that people are trying to check the statement handle for error messages with OCIParse. Since the statement handle ($sth) is not created yet, you need to check the database handle ($dbh) for any errors with OCIParse. For example:
instead of:
$stmt = OCIParse($conn, $query);
if (!$stmt) {
$oerr = OCIError($stmt);
echo "Fetch Code 1:".$oerr["message"];
exit;
}
use:
$stmt = OCIParse($conn, $query);
if (!$stmt) {
$oerr = OCIError($conn);
echo "Fetch Code 1:".$oerr["message"];
exit;
}
Hope this helps someone.
badr
connecting to oracle database, get the data and insert it into a dynamic drop down box
<?php
$conn = oci_connect("$username", "$password", 'ora10g');
if (!$conn) {
$e = oci_error();
print htmlentities($e['message']);
exit;
}
?>
<SELECT name="name">
<?php
$query2 = "SELECT EMP_NAME, EMP_CODE FROM HR_EMP where APP_USER='$suserid' ";
$statement2 = oci_parse ($conn, $query2);
oci_execute ($statement2);
while ($row = oci_fetch_array ($statement2, OCI_NUM)) {
?>
<option value="<? echo $row[1]; ?>"> <? echo $row[0] ?> </option>
<? }
?>
</select>
webmaster
$sth = OCIParse ( $dbh, "begin sp_newaddress( :address_id, '$firstname', '$lastname', '$company', '$address1', '$address2', '$city', '$state', '$postalcode', '$country', :error_code );end;" );
This calls stored procedure sp_newaddress, with :address_id being an in/out variable and :error_code being an out variable. Then you do the binding:
OCIBindByName ( $sth, ":address_id", $addr_id, 10 );
OCIBindByName ( $sth, ":error_code", $errorcode, 10 );
OCIExecute ( $sth );
Hope this helps!
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