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oci_parse

(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)

oci_parse配置 Oracle 语句预备执行

说明

resource oci_parse ( resource $connection , string $query )

oci_parse()connection 上配置 query 并返回语句标识符以用于 oci_bind_by_name()oci_execute() 以及其它函数。

Note:

本函数并不验证 query。要知道 query 是否是合法的 SQL 或 PL/SQL 语句的唯一方法是执行它。

oci_parse() 在出错时返回 FALSE

Note:

在 PHP 5.0.0 之前的版本必须使用 ociparse() 替代本函数。该函数名仍然可用,为向下兼容作为 oci_parse() 的别名。不过其已被废弃,不推荐使用。

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User Contributed Notes 5 notes

up
1
kurt at kovac dot ch
13 years ago
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:

<?php
$stmt
= OCIParse($conn, $query);
if (!
$stmt) {
  
$oerr = OCIError($stmt);
   echo
"Fetch Code 1:".$oerr["message"];
   exit;
}
?>

use:

<?php
$stmt
= OCIParse($conn, $query);
if (!
$stmt) {
  
$oerr = OCIError($conn);
   echo
"Fetch Code 1:".$oerr["message"];
   exit;
}
?>

Hope this helps someone.
up
0
interloper at ukr dot net
2 years ago
If you want using PL/SQL in variable:

<?php
$query
= "begin null;  end;";
$stid = oci_parse($conn, "$query");
?>

or

<?php
$stid
= oci_parse($conn, "begin null;  end;");
?>
up
0
michael dot virnstein at brodos dot de
9 years ago
A neat way to parse a query only once per script, if the query is done inside a function:

<?php
function querySomething($conn, $id)
{
    static
$stmt;

    if (
is_null($stmt)) {
       
$stmt = oci_parse($conn, 'select * from t where pk = :id');
    }

   
oci_bind_by_name($stmt, ':id', $id, -1);

   
oci_execute($stmt, OCI_DEFAULT);

    return
oci_fetch_array($stmt, OCI_ASSOC);

}

?>

With the static variable, the statment handle isn't closed after the function has terminated. Very nice for functions that are called e.g. in loops. Unfortunately this only works for static sql. If you have dynamic sql, you can do the following:

<?php

function querySomething($conn, $data)
{
    static
$stmt = array();
   
   
$first = true;
   
   
$query = 'select * from t';

    foreach (
$data as $key => $value) {
        if (
$first) {
           
$first = false;
           
$query .= ' where ';
        } else {
           
$query .= ' and ';
        }
       
       
$query .= "$key = :b$key";
    }
   
   
$queryhash = md5($query);
  
    if (
is_null($stmt[$queryhash])) {
       
$stmt[$queryhash] = oci_parse($conn, $query);   
    }

    foreach (
$data as $key => $value) {
       
// don't use $value, because we bind memory addresses here.
        // this would result in every bind pointing at the same value after foreach
       
oci_bind_by_name($stmt[$queryhash], ":b$key", $data[$key], -1);
    }
   
   
oci_execute($stmt[$queryhash], OCI_DEFAULT);

    return
oci_fetch_array($stmt[$queryhash], OCI_ASSOC);

}

?>
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0
egypt at nmt dot edu
14 years ago
Whereas MySQL doesn't care what kind of quotes are around a LIKE clause, ociexecute gives the error:
    ociexecute(): OCIStmtExecute: ORA-00904: "NM": invalid identifier
for the following.
<?php
$sql 
= "SELECT * FROM addresses "
     
. "WHERE state LIKE \"NM\""// error!
$stmt = ociparse($conn, $sql);
ociexecute($stmt);
?>

it's fine if you just use single quotes:
    . "WHERE state LIKE 'NM'";
but i think it's interesting that ociparse doesn't say anything
up
-5
falundir at gmail dot com
6 years ago
When you want to call stored function (and want to read its result) which executes DML queries (insert, update, delete) inside its body you can't use "select your_stored_function(:param1, :param2) from dual" because you will receive "ORA-14551: cannot perform a DML operation inside a query" error.

In order to call such function and get its result you need to wrap it into nested procedure with OUT parameter like this:

DECLARE
  PROCEDURE caller(return_value OUT NUMBER) AS
  BEGIN
    return_value := your_stored_function(:param1, :param2);
  END;
BEGIN
  caller(:return_value);
END;

and bind to :return_value variable to get the result of function.
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