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


Описание

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

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


Список параметров

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
0SQL_SCOPE_CURROWRow identifier is valid only while the cursor is positioned on the row.
1SQL_SCOPE_TRANSACTIONRow identifier is valid for the duration of the transaction.
2SQL_SCOPE_SESSIONRow identifier is valid for the duration of the connection.


Возвращаемые значения

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
0SQL_SCOPE_CURROWRow identifier is valid only while the cursor is positioned on the row.
1SQL_SCOPE_TRANSACTIONRow identifier is valid for the duration of the transaction.
2SQL_SCOPE_SESSIONRow identifier is valid for the duration of the connection.

COLUMN_NAMEName of the unique column.
DATA_TYPESQL data type for the column.
TYPE_NAMECharacter string representation of the SQL data type for the column.
COLUMN_SIZEAn 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_COLUMNAlways returns 1.


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