sp_foreign_keys_rowset (Transact-SQL MetaData) Definition

Please note: that the following source code is provided and copyrighted by Microsoft and is for educational purpose only.
The meta data is from an SQL 2012 Server.

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Definition:

sys.sp_foreign_keys_rowset(nvarchar @pk_table_name
, nvarchar @pk_table_schema
, nvarchar @foreignkey_tab_name
, nvarchar @foreignkey_tab_schema
, nvarchar @foreignkey_tab_catalog)

MetaData:

   
create procedure sys.sp_foreign_keys_rowset  
(  
    @pk_table_name          sysname,  
    @pk_table_schema        sysname = null,  
    @foreignkey_tab_name    sysname = null,  
    @foreignkey_tab_schema  sysname = null,  
    @foreignkey_tab_catalog sysname = null  
)  
as  
    select  
--         PK_TABLE_CATALOG    = db_name(r.rkeydbid),  
        PK_TABLE_CATALOG    = db_name(),  
        PK_TABLE_SCHEMA     = schema_name(o1.schema_id),  
        PK_TABLE_NAME       = o1.name,  
        PK_COLUMN_NAME      = c1.name,  
        PK_COLUMN_GUID      = convert(uniqueidentifier,null),  
        PK_COLUMN_PROPID    = convert(int,null),  
--         FK_TABLE_CATALOG    = db_name(r.fkeydbid),  
        FK_TABLE_CATALOG    = db_name(),  
        FK_TABLE_SCHEMA     = schema_name(o2.schema_id),  
        FK_TABLE_NAME       = o2.name,  
        FK_COLUMN_NAME      = c2.name,  
        FK_COLUMN_GUID      = convert(uniqueidentifier,null),  
        FK_COLUMN_PROPID    = convert(int,null),  
        ORDINAL             = convert(int,k.constraint_column_id),  
--         UPDATE_RULE         = CASE ObjectProperty(r.constid, 'CnstIsUpdateCascade')  
        UPDATE_RULE         = CASE r.update_referential_action  
                              WHEN 1 THEN N'CASCADE'  
                              WHEN 2 THEN N'SET NULL'  
                              WHEN 3 THEN N'SET DEFAULT'  
                              ELSE        N'NO ACTION'  
                              END,  
--         DELETE_RULE         = CASE ObjectProperty(r.constid, 'CnstIsDeleteCascade')  
        DELETE_RULE         = CASE r.delete_referential_action  
                              WHEN 1 THEN N'CASCADE'  
                              WHEN 2 THEN N'SET NULL'  
                              WHEN 3 THEN N'SET DEFAULT'  
                              ELSE        N'NO ACTION'  
                              END,  
        PK_NAME             = i.name,  
--         FK_NAME             = object_name(r.constid),  
        FK_NAME             = object_name(r.object_id),  
        DEFERRABILITY       = convert(smallint, 3) --  DBPROPVAL_DF_NOT_DEFERRABLE  
    from  
        sys.all_objects o1, --  ISSUE - PERF - do inner joins here instead of old join in where clause !!!  
        sys.all_objects o2, --  ISSUE - PERF - do inner joins here instead of old join in where clause !!!  
        sys.all_columns c1,  
        sys.all_columns c2,  
  
--         sysreferences r,  
        sys.foreign_keys r inner join  
        sys.foreign_key_columns k on (k.constraint_object_id = r.object_id) inner join  
        sys.indexes i on (r.referenced_object_id = i.object_id and r.key_index_id = i.index_id)  
    where  
            (@foreignkey_tab_catalog is null or @foreignkey_tab_catalog = db_name())  
        and (                                   @pk_table_name = o1.name)                         --  ISSUE - PERF - Do check against object_id, not against the names !!!  
        and (@pk_table_schema  is null       or @pk_table_schema = schema_name(o1.schema_id))  --  ISSUE - PERF - Do check against object_id, not against the names !!!  
        and (@foreignkey_tab_name    is null or @foreignkey_tab_name = o2.name)                         --  ISSUE - PERF - Do check against object_id, not against the names !!!  
        and (@foreignkey_tab_schema  is null or @foreignkey_tab_schema = schema_name(o2.schema_id))  --  ISSUE - PERF - Do check against object_id, not against the names !!!  
        and  
        o1.object_id = r.referenced_object_id and  
        o1.object_id = c1.object_id and  
        c1.column_id = k.referenced_column_id and  
        o2.object_id = r.parent_object_id and  
        o2.object_id = c2.object_id and  
        c2.column_id = k.parent_column_id  
    order by 8,9,2,3,13