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PHP : Function Reference : IBM DB2, Cloudscape and Apache Derby Functions : db2_set_option

db2_set_option

Set options for connection or statement resources (PECL ibm_db2:1.0-1.6.2)
bool db2_set_option ( resource resource, array options, int type )

Sets options for a statement resource or a connection resource. You cannot set options for result set resources.

Parameters

resource

A valid statement resource as returned from db2_prepare() or a valid connection resource as returned from db2_connect() or db2_pconnect().

options

An associative array containing valid statement or connection options. This parameter can be used to change autocommit values, cursor types (scrollable or forward), and to specify the case of the column names (lower, upper, or natural) that will appear in a result set.

autocommit

Passing DB2_AUTOCOMMIT_ON turns autocommit on for the specified connection resource.

Passing DB2_AUTOCOMMIT_OFF turns autocommit off for the specified connection resource.

cursor

Passing DB2_FORWARD_ONLY specifies a forward-only cursor for a statement resource. This is the default cursor type, and is supported by all database servers.

Passing DB2_SCROLLABLE specifies a scrollable cursor for a statement resource. Scrollable cursors enable result set rows to be accessed in non-sequential order, but are only supported by IBM DB2 Universal Database databases.

binmode

Passing DB2_BINARY specifies that binary data will be returned as is. This is the default mode. This is the equivalent of setting ibm_db2.binmode=1 in php.ini.

Passing DB2_CONVERT specifies that binary data will be converted to hexadecimal encoding, and will be returned as such. This is the equivalent of setting ibm_db2.binmode=2 in php.ini.

Passing DB2_PASSTHRU specifies that binary data will be converted to NULL. This is the equivalent of setting ibm_db2.binmode=3 in php.ini.

db2_attr_case

Passing DB2_CASE_LOWER specifies that column names of the result set are returned in lower case.

Passing DB2_CASE_UPPER specifies that column names of the result set are returned in upper case.

Passing DB2_CASE_NATURAL specifies that column names of the result set are returned in natural case.

deferred_prepare

Passing DB2_DEFERRED_PREPARE_ON turns deferred prepare on for the specified statement resource.

Passing DB2_DEFERRED_PREPARE_OFF turns deferred prepare off for the specified statement resource.

The following new i5/OS options are available as of ibm_db2 version 1.5.1.

Note:

Prior versions of ibm_db2 do not support these new i5 options.

i5_fetch_only

DB2_I5_FETCH_ON - Cursors are read-only and cannot be used for positioned updates or deletes. This is the default unless SQL_ATTR_FOR_FETCH_ONLY environment has been set to SQL_FALSE.

DB2_I5_FETCH_OFF - Cursors can be used for positioned updates and deletes.

The following new options are available as of ibm_db2 version 1.6.0. They provide useful tracking information that can be accessed during execution with db2_get_option().

Note:

Prior versions of ibm_db2 do not support these new options.

When the value in each option is being set, some servers might not handle the entire length provided and might truncate the value.

To ensure that the data specified in each option is converted correctly when transmitted to a host system, use only the characters A through Z, 0 through 9, and the underscore (_) or period (.).

userid

SQL_ATTR_INFO_USERID - A pointer to a null-terminated character string used to identify the client user ID sent to the host database server when using DB2 Connect.

Note:

DB2 for z/OS and OS/390 servers support up to a length of 16 characters. This user-id is not to be confused with the authentication user-id, it is for identification purposes only and is not used for any authorization.

acctstr

SQL_ATTR_INFO_ACCTSTR - A pointer to a null-terminated character string used to identify the client accounting string sent to the host database server when using DB2 Connect.

Note:

DB2 for z/OS and OS/390 servers support up to a length of 200 characters.

applname

SQL_ATTR_INFO_APPLNAME - A pointer to a null-terminated character string used to identify the client application name sent to the host database server when using DB2 Connect.

Note:

DB2 for z/OS and OS/390 servers support up to a length of 32 characters.

wrkstnname

SQL_ATTR_INFO_WRKSTNNAME - A pointer to a null-terminated character string used to identify the client workstation name sent to the host database server when using DB2 Connect.

Note:

DB2 for z/OS and OS/390 servers support up to a length of 18 characters.

type

An integer value that specifies the type of resource that was passed into the function. The type of resource and this value must correspond.

Passing 1 as the value specifies that a connection resource has been passed into the function.

Passing any integer not equal to 1 as the value specifies that a statement resource has been passed into the function.

The following table specifies which options are compatible with the available resource types:

Table 128. Resource-Parameter Matrix

Key Value Resource Type
    Connection Statement Result Set
autocommit DB2_AUTOCOMMIT_ON X - -
autocommit DB2_AUTOCOMMIT_OFF X - -
cursor DB2_SCROLLABLE - X -
cursor DB2_FORWARD_ONLY - X -
binmode DB2_BINARY X X -
binmode DB2_CONVERT X X -
binmode DB2_PASSTHRU X X -
db2_attr_case DB2_CASE_LOWER X X -
db2_attr_case DB2_CASE_UPPER X X -
db2_attr_case DB2_CASE_NATURAL X X -
deferred_prepare DB2_DEFERRED_PREPARE_ON - X -
deferred_prepare DB2_DEFERRED_PREPARE_OFF - X -
i5_fetch_only DB2_I5_FETCH_ON - X -
i5_fetch_only DB2_I5_FETCH_OFF - X -
userid SQL_ATTR_INFO_USERID X X -
acctstr SQL_ATTR_INFO_ACCTSTR X X -
applname SQL_ATTR_INFO_APPLNAME X X -
wrkstnname SQL_ATTR_INFO_WRKSTNNAME X X -


Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 953. Setting one parameter with a connection resource

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_ON);

/* Call the function using the correct resource, options array, and type values */
$result = db2_set_option($conn, $options, 1);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Options Set Successfully


Example 954. Setting multiple parameters with a connection resource

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF,
                   
'binmode' => DB2_PASSTHRU,
             
'db2_attr_case' => DB2_CASE_UPPER,
                   
'cursor' => DB2_SCROLLABLE);

/* Call the function using the correct resource, options array, and type values */
$result = db2_set_option($conn, $options, 1);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Options Set Successfully


Example 955. Setting multiple parameters with an invalid key

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF,
           
'MY_INVALID_KEY' => DB2_PASSTHRU,
             
'db2_attr_case' => DB2_CASE_UPPER,
                   
'cursor' => DB2_SCROLLABLE);

/* Call the function using the correct resource, options array, and type values */
$result = db2_set_option($conn, $options, 1);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Could Not Set Options


Example 956. Setting multiple parameters with an invalid value

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF,
                   
'binmode' => 'INVALID_VALUE',
             
'db2_attr_case' => DB2_CASE_UPPER,
                   
'cursor' => DB2_SCROLLABLE);

/* Call the function using the correct resource, options array, and type values */
$result = db2_set_option($conn, $options, 1);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Could Not Set Options


Example 957. Setting multiple parameters with a connection resource and the wrong type

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF,
                   
'binmode' => DB2_PASSTHRU,
             
'db2_attr_case' => DB2_CASE_UPPER,
                   
'cursor' => DB2_SCROLLABLE);

/* Call the function using the correct resource, options array, and the wrong type value */
$result = db2_set_option($conn, $options, 2);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Could Not Set Options


Example 958. Setting multiple parameters with the wrong resource

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF,
                   
'binmode' => DB2_PASSTHRU,
             
'db2_attr_case' => DB2_CASE_UPPER,
                   
'cursor' => DB2_SCROLLABLE);

$stmt = db2_prepare($conn, 'SELECT * FROM EMPLOYEE');

/* Call the function using the wrong resource, and the correct options array, and type values */
$result = db2_set_option($stmt, $options, 1);

/* Check if all options could be set correctly */
if($result)
{
 echo
'Options Set Successfully';
}
else
{
 echo
'Could Not Set Options';
}
?>

The above example will output:

Could Not Set Options


Example 959. Putting it all together

<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$hostname = 'localhost';
$port = 50000;
$protocol = 'TCPIP';
$username = 'db2inst1';
$password = 'ibmdb2';

/* Connection String */
$conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;";
$conn_string .= "HOSTNAME=$hostname;PORT=$port;PROTOCOL=$protocol;";
$conn_string .= "UID=$username;PWD=$password;";

/* Obtain Connection Resource */
$conn = db2_connect($conn_string, '', '');

/* Create the associative options array with valid key-value pairs */
$options = array('db2_attr_case' => DB2_CASE_LOWER,
                       
'cursor' => DB2_SCROLLABLE);

$stmt = db2_prepare($conn, 'SELECT * FROM EMPLOYEE WHERE EMPNO = ? OR EMPNO = ?');

/* Call the function using the correct resource, options array, and type values */
$option_result = db2_set_option($stmt, $options, 2);
$result = db2_execute($stmt, array('000130', '000140'));

/* Get Row 2 before Row 1 since Scrollable Cursor */
print_r(db2_fetch_assoc($stmt, 2));
print
'<br /><br />';
print_r(db2_fetch_assoc($stmt, 1));

?>

The above example will output:

Array
(
   [empno] => 000140
   [firstnme] => HEATHER
   [midinit] => A
   [lastname] => NICHOLLS
   [workdept] => C01
   [phoneno] => 1793
   [hiredate] => 1976-12-15
   [job] => ANALYST
   [edlevel] => 18
   [sex] => F
   [birthdate] => 1946-01-19
   [salary] => 28420.00
   [bonus] => 600.00
   [comm] => 2274.00
)

Array
(
   [empno] => 000130
   [firstnme] => DELORES
   [midinit] => M
   [lastname] => QUINTANA
   [workdept] => C01
   [phoneno] => 4578
   [hiredate] => 1971-07-28
   [job] => ANALYST
   [edlevel] => 16
   [sex] => F
   [birthdate] => 1925-09-15
   [salary] => 23800.00
   [bonus] => 500.00
   [comm] => 1904.00
)


Example 960. i5/OS cursors are read-only

<?php
 $conn
= db2_connect("", "", "", array("i5_lib"=>"nobody"));
 
$stmt = db2_prepare($conn, 'select * from names where first = ?');
 
$name = "first2";
 
db2_bind_param($stmt, 1, "name", DB2_PARAM_IN);
 
$options = array("i5_fetch_only"=>DB2_I5_FETCH_ON);
 
db2_set_option($stmt,$options,0);
 if (
db2_execute($stmt)) {
   while (
$row = db2_fetch_array($stmt)) {
     echo
"{$row[0]} {$row[1]}";
   }
 }
?>

The above example will output:

first2 last2


Code Examples / Notes » db2_set_option

rtejpar

Examples 3 and 4 should output 'Options Set Successfully.'  This is because, only a single option's key/value is set incorrectly (other options are still correct), hence the function must return successfully. (Instead a PHP warning will most probably be issued).

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db2_autocommit
db2_bind_param
db2_client_info
db2_close
db2_column_privileges
db2_columns
db2_commit
db2_conn_error
db2_conn_errormsg
db2_connect
db2_cursor_type
db2_escape_string
db2_exec
db2_execute
db2_fetch_array
db2_fetch_assoc
db2_fetch_both
db2_fetch_object
db2_fetch_row
db2_field_display_size
db2_field_name
db2_field_num
db2_field_precision
db2_field_scale
db2_field_type
db2_field_width
db2_foreign_keys
db2_free_result
db2_free_stmt
db2_get_option
db2_lob_read
db2_next_result
db2_num_fields
db2_num_rows
db2_pconnect
db2_prepare
db2_primary_keys
db2_procedure_columns
db2_procedures
db2_result
db2_rollback
db2_server_info
db2_set_option
db2_special_columns
db2_statistics
db2_stmt_error
db2_stmt_errormsg
db2_table_privileges
db2_tables
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