array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'de', ), 'this' => array ( 0 => 'function.db2-special-columns.php', 1 => 'db2_special_columns', 2 => 'Returns a result set listing the unique row identifier columns for a table', ), 'up' => array ( 0 => 'ref.ibm-db2.php', 1 => 'IBM DB2 Funktionen', ), 'prev' => array ( 0 => 'function.db2-set-option.php', 1 => 'db2_set_option', ), 'next' => array ( 0 => 'function.db2-statistics.php', 1 => 'db2_statistics', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/ibm_db2/functions/db2-special-columns.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

db2_special_columns

(PECL ibm_db2 >= 1.0.0)

db2_special_columns — Returns a result set listing the unique row identifier columns for a table

Beschreibung

db2_special_columns(
    resource $connection,
    ?string $qualifier,
    string $schema,
    string $table_name,
    int $scope
): resource

Returns a result set listing the unique row identifier columns for a table.

Parameter-Liste

connection
A valid connection to an IBM DB2, Cloudscape, or Apache Derby database.
qualifier
A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass null or an empty string.
schema
The schema which contains the tables.
table_name
The name of the table.
scope

Integer value representing the minimum duration for which the unique row identifier is valid. This can be one of the following values:
Integer value SQL constant Description
0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row.
1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction.
2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection.

Rückgabewerte

Returns a statement resource with a result set containing rows with unique row identifier information for a table. The rows are composed of the following columns:
Column name Description
SCOPE
Integer value SQL constant Description
0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row.
1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction.
2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection.
COLUMN_NAME Name of the unique column.
DATA_TYPE SQL data type for the column.
TYPE_NAME Character string representation of the SQL data type for the column.
COLUMN_SIZE An integer value representing the size of the column.
BUFFER_LENGTH Maximum number of bytes necessary to store data from this column.
DECIMAL_DIGITS The scale of the column, or null where scale is not applicable.
NUM_PREC_RADIX An integer value of either 10 (representing an exact numeric data type), 2 (representing an approximate numeric data type), or null (representing a data type for which radix is not applicable).
PSEUDO_COLUMN Always returns 1.

Siehe auch