You CANNOT bind parameters for table and/or column names. Binding parameters only works for values:
YES: $sqlQuery = "UPDATE ".TB_NAME." SET ".CN_NAME." = ? WHERE DAY = ?";
NO: $sqlQuery = "UPDATE ? SET ? = ? WHERE DAY = ?";
Any attempt to bind column or table names will result in the following error during db2_execute():
PHP Warning: db2_bind_param(): Describe Param Failed in ...
PHP - Manual: db2_execute
2024-12-22
db2_execute
(PECL ibm_db2 >= 1.0.0)
db2_execute — Executes a prepared SQL statement
说明
db2_execute(resource
$stmt, array $parameters = ?): booldb2_execute() executes an SQL statement that was prepared by db2_prepare().
If the SQL statement returns a result set, for example, a SELECT statement
or a CALL to a stored procedure that returns one or more result sets, you
can retrieve a row as an array from the stmt resource
using db2_fetch_assoc(),
db2_fetch_both(), or
db2_fetch_array(). Alternatively, you can use
db2_fetch_row() to move the result set pointer to the
next row and fetch a column at a time from that row with
db2_result().
Refer to db2_prepare() for a brief discussion of the advantages of using db2_prepare() and db2_execute() rather than db2_exec().
参数
-
stmt -
A prepared statement returned from db2_prepare().
-
parameters -
An array of input parameters matching any parameter markers contained in the prepared statement.
返回值
成功时返回 true， 或者在失败时返回 false。
范例
示例 #1 Preparing and executing an SQL statement with parameter markers
The following example prepares an INSERT statement that accepts four parameter markers, then iterates over an array of arrays containing the input values to be passed to db2_execute().
<?php
$pet = array(0, 'cat', 'Pook', 3.2);
$insert = 'INSERT INTO animals (id, breed, name, weight)
VALUES (?, ?, ?, ?)';
$stmt = db2_prepare($conn, $insert);
if ($stmt) {
$result = db2_execute($stmt, $pet);
if ($result) {
print "Successfully added new pet.";
}
}
?>
以上例程会输出：
Successfully added new pet.
示例 #2 Calling a stored procedure with an OUT parameter
The following example prepares a CALL statement that accepts one
parameter marker representing an OUT parameter, binds the PHP variable
$my_pets to the parameter using
db2_bind_param(), then issues
db2_execute() to execute the CALL statement. After the
CALL to the stored procedure has been made, the value of
$num_pets changes to reflect the value returned by the
stored procedure for that OUT parameter.
<?php
$num_pets = 0;
$res = db2_prepare($conn, "CALL count_my_pets(?)");
$rc = db2_bind_param($res, 1, "num_pets", DB2_PARAM_OUT);
$rc = db2_execute($res);
print "I have $num_pets pets!";
?>
以上例程会输出：
I have 7 pets!
示例 #3 Returning XML data as an SQL ResultSet
The following example demonstrates how to work with documents stored in a XML column using the SAMPLE database. Using some pretty simple SQL/XML, this example returns some of the nodes in a XML document in an SQL ResultSet format that most users are familiar with.
<?php
$conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");
$query = 'SELECT * FROM XMLTABLE(
XMLNAMESPACES (DEFAULT \'http://posample.org\'),
\'db2-fn:xmlcolumn("CUSTOMER.INFO")/customerinfo\'
COLUMNS
"CID" VARCHAR (50) PATH \'@Cid\',
"NAME" VARCHAR (50) PATH \'name\',
"PHONE" VARCHAR (50) PATH \'phone [ @type = "work"]\'
) AS T
WHERE NAME = ?
';
$stmt = db2_prepare($conn, $query);
$name = 'Kathy Smith';
if ($stmt) {
db2_bind_param($stmt, 1, "name", DB2_PARAM_IN);
db2_execute($stmt);
while($row = db2_fetch_object($stmt)){
printf("$row->CID $row->NAME $row->PHONE\n");
}
}
db2_close($conn);
?>
以上例程会输出：
1000 Kathy Smith 416-555-1358 1001 Kathy Smith 905-555-7258
示例 #4 Performing a "JOIN" with XML data
The following example works with documents stored in 2 different XML columns in the SAMPLE database. It creates 2 temporary tables from the XML documents from 2 different columns and returns an SQL ResultSet with information regarding shipping status for the customer.
<?php
$conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");
$query = '
SELECT A.CID, A.NAME, A.PHONE, C.PONUM, C.STATUS
FROM
XMLTABLE(
XMLNAMESPACES (DEFAULT \'http://posample.org\'),
\'db2-fn:xmlcolumn("CUSTOMER.INFO")/customerinfo\'
COLUMNS
"CID" BIGINT PATH \'@Cid\',
"NAME" VARCHAR (50) PATH \'name\',
"PHONE" VARCHAR (50) PATH \'phone [ @type = "work"]\'
) as A,
PURCHASEORDER AS B,
XMLTABLE (
XMLNAMESPACES (DEFAULT \'http://posample.org\'),
\'db2-fn:xmlcolumn("PURCHASEORDER.PORDER")/PurchaseOrder\'
COLUMNS
"PONUM" BIGINT PATH \'@PoNum\',
"STATUS" VARCHAR (50) PATH \'@Status\'
) as C
WHERE A.CID = B.CUSTID AND
B.POID = C.PONUM AND
A.NAME = ?
';
$stmt = db2_prepare($conn, $query);
$name = 'Kathy Smith';
if ($stmt) {
db2_bind_param($stmt, 1, "name", DB2_PARAM_IN);
db2_execute($stmt);
while($row = db2_fetch_object($stmt)){
printf("$row->CID $row->NAME $row->PHONE $row->PONUM $row->STATUS\n");
}
}
db2_close($conn);
?>
以上例程会输出：
1001 Kathy Smith 905-555-7258 5002 Shipped
示例 #5 Returning SQL data as part of a larger XML document
The following example works with a portion of the PRODUCT.DESCRIPTION documents in the SAMPLE database. It creates a XML document containing product description (XML data) and pricing info (SQL data).
<?php
$conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");
$query = '
SELECT
XMLSERIALIZE(
XMLQUERY(\'
declare boundary-space strip;
declare default element namespace "http://posample.org";
<promoList> {
for $prod in $doc/product
where $prod/description/price < 10.00
order by $prod/description/price ascending
return(
<promoitem> {
$prod,
<startdate> {$start} </startdate>,
<enddate> {$end} </enddate>,
<promoprice> {$promo} </promoprice>
} </promoitem>
)
} </promoList>
\' passing by ref DESCRIPTION AS "doc",
PROMOSTART as "start",
PROMOEND as "end",
PROMOPRICE as "promo"
RETURNING SEQUENCE)
AS CLOB (32000))
AS NEW_PRODUCT_INFO
FROM PRODUCT
WHERE PID = ?
';
$stmt = db2_prepare($conn, $query);
$pid = "100-100-01";
if ($stmt) {
db2_bind_param($stmt, 1, "pid", DB2_PARAM_IN);
db2_execute($stmt);
while($row = db2_fetch_array($stmt)){
printf("$row[0]\n");
}
}
db2_close($conn);
?>
以上例程会输出：
<promoList xmlns="http://posample.org">
<promoitem>
<product pid="100-100-01">
<description>
<name>Snow Shovel, Basic 22 inch</name>
<details>Basic Snow Shovel, 22 inches wide, straight handle with D-Grip</details>
<price>9.99</price>
<weight>1 kg</weight>
</description>
</product>
<startdate>2004-11-19</startdate>
<enddate>2004-12-19</enddate>
<promoprice>7.25</promoprice>
</promoitem>
</promoList>
参见
- db2_exec() - Executes an SQL statement directly
- db2_fetch_array() - Returns an array, indexed by column position, representing a row in a result set
- db2_fetch_assoc() - Returns an array, indexed by column name, representing a row in a result set
- db2_fetch_both() - Returns an array, indexed by both column name and position, representing a row in a result set
- db2_fetch_row() - Sets the result set pointer to the next row or requested row
- db2_prepare() - Prepares an SQL statement to be executed
- db2_result() - Returns a single column from a row in the result set
add a note
User Contributed Notes 1 note
stefanov at uk dot ibm dot com ¶
6 years ago
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