DB2_STMT_ERRORMSG(3) 1 DB2_STMT_ERRORMSG(3)db2_stmt_errormsg - Returns a string containing the last SQL statement error messageSYNOPSIS
string db2_stmt_errormsg ([resource $stmt])
DESCRIPTION
Returns a string containing the last SQL statement error message.
If you do not pass a statement resource as an argument to db2_stmt_errormsg(3), the driver returns the error message associated with the
last attempt to return a statement resource, for example, from db2_prepare(3) or db2_exec(3).
PARAMETERS
o $stmt
- A valid statement resource.
RETURN VALUES
Returns a string containing the error message and SQLCODE value for the last error that occurred issuing an SQL statement.
SEE ALSO db2_conn_error(3), db2_conn_errormsg(3), db2_stmt_error(3).
PHP Documentation Group DB2_STMT_ERRORMSG(3)
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DB2_PREPARE(3) 1 DB2_PREPARE(3)db2_prepare - Prepares an SQL statement to be executedSYNOPSIS
resource db2_prepare (resource $connection, string $statement, [array $options])
DESCRIPTION db2_prepare(3) creates a prepared SQL statement which can include 0 or more parameter markers ( ? characters) representing parameters for
input, output, or input/output. You can pass parameters to the prepared statement using db2_bind_param(3), or for input values only, as an
array passed to db2_execute(3).
There are three main advantages to using prepared statements in your application:
o Performance: when you prepare a statement, the database server creates an optimized access plan for retrieving data with that
statement. Subsequently issuing the prepared statement with db2_execute(3) enables the statements to reuse that access plan and
avoids the overhead of dynamically creating a new access plan for every statement you issue.
o Security: when you prepare a statement, you can include parameter markers for input values. When you execute a prepared statement
with input values for placeholders, the database server checks each input value to ensure that the type matches the column defini-
tion or parameter definition.
o Advanced functionality: Parameter markers not only enable you to pass input values to prepared SQL statements, they also enable
you to retrieve OUT and INOUT parameters from stored procedures using db2_bind_param(3).
PARAMETERS
o $connection
- A valid database connection resource variable as returned from db2_connect(3) or db2_pconnect(3).
o $statement
- An SQL statement, optionally containing one or more parameter markers..
o $options
- An associative array containing statement options. You can use this parameter to request a scrollable cursor on database servers
that support this functionality. For a description of valid statement options, see db2_set_option(3).
RETURN VALUES
Returns a statement resource if the SQL statement was successfully parsed and prepared by the database server. Returns FALSE if the data-
base server returned an error. You can determine which error was returned by calling db2_stmt_error(3) or db2_stmt_errormsg(3).
EXAMPLES
Example #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 con-
taining the input values to be passed to db2_execute(3).
<?php
$animals = array(
array(0, 'cat', 'Pook', 3.2),
array(1, 'dog', 'Peaches', 12.3),
array(2, 'horse', 'Smarty', 350.0),
);
$insert = 'INSERT INTO animals (id, breed, name, weight)
VALUES (?, ?, ?, ?)';
$stmt = db2_prepare($conn, $insert);
if ($stmt) {
foreach ($animals as $animal) {
$result = db2_execute($stmt, $animal);
}
}
?>
SEE ALSO db2_bind_param(3), db2_execute(3), db2_stmt_error(3), db2_stmt_errormsg(3).
PHP Documentation Group DB2_PREPARE(3)