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PHP db2_foreign_keys

PHP original manual for db2_foreign_keys [ show | php.net ]

db2_foreign_keys

(PECL ibm_db2 >= 1.0.0)

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 )

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 name Description
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_NAME Name of the table containing the primary key.
PKCOLUMN_NAME Name 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_NAME Name of the table containing the foreign key.
FKCOLUMN_NAME Name of the column containing the foreign key.
KEY_SEQ 1-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_NAME The name of the foreign key.
PK_NAME The 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() - Returns a result set listing the columns and associated privileges for a table
  • db2_columns() - Returns a result set listing the columns and associated metadata for a table
  • db2_primary_keys() - Returns a result set listing primary keys for a table
  • db2_procedure_columns() - Returns a result set listing stored procedure parameters
  • db2_procedures() - Returns a result set listing the stored procedures registered in a database
  • db2_special_columns() - Returns a result set listing the unique row identifier columns for a table
  • db2_statistics() - Returns a result set listing the index and statistics for a table
  • db2_table_privileges() - Returns a result set listing the tables and associated privileges in a database
  • db2_tables() - Returns a result set listing the tables and associated metadata in a database