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db2_foreign_keys

(no version information, might be only in CVS)

db2_foreign_keys --  Returns a result set listing the foreign keys for a table

Description

resource db2_foreign_keys ( resource connection, string qualifier, string schema, string table-name )

Warning

This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.

Returns a result set listing the foreign keys 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. If schema is NULL, db2_foreign_keys() matches the schema for the current connection.

table-name

The name of the table.

Return Values

Returns a statement resource with a result set containing rows describing the foreign keys for the specified table. The result set is composed of the following columns:

Column nameDescription
PKTABLE_CAT Name of the catalog for the table containing the primary key. The value is NULL if this table does not have catalogs.
PKTABLE_SCHEM Name of the schema for the table containing the primary key.
PKTABLE_NAMEName of the table containing the primary key.
PKCOLUMN_NAMEName of the column containing the primary key.
FKTABLE_CAT Name of the catalog for the table containing the foreign key. The value is NULL if this table does not have catalogs.
FKTABLE_SCHEM Name of the schema for the table containing the foreign key.
FKTABLE_NAMEName of the table containing the foreign key.
FKCOLUMN_NAMEName of the column containing the foreign key.
KEY_SEQ1-indexed position of the column in the key.
UPDATE_RULE Integer value representing the action applied to the foreign key when the SQL operation is UPDATE.
DELETE_RULE Integer value representing the action applied to the foreign key when the SQL operation is DELETE.
FK_NAMEThe name of the foreign key.
PK_NAMEThe name of the primary key.
DEFERRABILITY An integer value representing whether the foreign key deferrability is SQL_INITIALLY_DEFERRED, SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE.

See Also

db2_column_privileges()
db2_columns()
db2_primary_keys()
db2_procedure_columns()
db2_procedures()
db2_special_columns()
db2_statistics()
db2_table_privileges()
db2_tables()

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