PHP db2_special_columns function

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db2_special_columns

(PECL)

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

Parameters

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 valueSQL constantDescription0SQL_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.

Return Values

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 nameDescriptionSCOPE

Integer valueSQL constantDescription0SQL_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.

See Also

db2_column_privileges()db2_columns()db2_foreign_keys()db2_primary_keys()db2_procedure_columns()db2_procedures()db2_statistics()db2_table_privileges()db2_tables()