sp_MScreatelightweightupdateproc (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_MScreatelightweightupdateproc(uniqueidentifier @pubid
, uniqueidentifier @artid)

MetaData:

 create procedure sys.sp_MScreatelightweightupdateproc   
    @pubid        uniqueidentifier,  
    @artid        uniqueidentifier  
as  
    set nocount on  
  
    declare @argname            nvarchar(10)  
    declare @tablenick            int  
    declare @destination_object    sysname  
    declare @destination_owner    sysname  
    declare @qualified_name     nvarchar(270)  
    declare @cmdpiece             nvarchar(4000)  
    declare @postfix            nchar(32)  
    declare @id                 int  
    declare @colid                 int  
    declare @previouscolid        int  
    declare @columnordinal        smallint  
    declare @colname             nvarchar(200)  
    declare @typename            sysname  
    declare @len                smallint  
    declare @prec                int  
    declare @scale                int  
    declare @isrowguidcol        tinyint  
    declare @comma                nvarchar(2)  
    declare @retcode            int  
    declare @maintainsmetadata    bit  
    declare @coltracked            bit  
    declare @enumtype_str        nvarchar(100)  
    declare @cmdtable            table (phase int not null,   
                                       step int identity not null,   
                                       cmdtext nvarchar(4000) collate database_default null)  
  
    --  Security check  
    exec @retcode= sys.sp_MSreplcheck_subscribe  
    if @@error <> 0 or @retcode <> 0 return (1)  
  
    select @tablenick= nickname,   
           @destination_object= destination_object,   
           @postfix= procname_postfix,   
           @destination_owner= destination_owner,  
           @coltracked= column_tracking  
        from dbo.sysmergearticles   
        where pubid = @pubid and artid = @artid  
  
    if 1=@coltracked  
    begin  
        set @enumtype_str= '@COLUMNS_ENUMERATED_ChangedOnly'  
    end  
    else  
    begin  
        set @enumtype_str= '@COLUMNS_ENUMERATED_AllOnOtherReason'  
    end  
  
    set @maintainsmetadata= sys.fn_MSarticle_allows_DML_at_this_replica(@artid, default)  
  
    if @destination_owner is null or @destination_owner = ''  
        select @qualified_name = quotename(@destination_object)  
    else  
        select @qualified_name = quotename(@destination_owner) + '.' + quotename(@destination_object)  
  
    --  Phase 0: Create procedure and fixed part of argument list.  
    set @cmdpiece= 'create procedure dbo.' + quotename('MSmerge_lws_sp_upd_'  + @postfix) + '  
    @rowguid    uniqueidentifier,  
    @setnullbm    varbinary(128)'  
  
    if 1 = @maintainsmetadata  
    begin  
        set @cmdpiece= @cmdpiece + ',  
        @rowvector        varbinary(11)'  
    end  
  
    insert into @cmdtable (phase, cmdtext) values (0, @cmdpiece)  
  
    --  Phase 1: Column arguments list. This will be done later.  
  
    --  Phase 2: Open procedure body.  
    set @cmdpiece='  
    as   
    set nocount on  
  
    --  Security check  
    if (is_member(''db_owner'') <> 1)  
    begin  
        raiserror(15247,-1,-1)  
        return (1)  
    end  
  
    declare @tablenick    int  
    set @tablenick= ' + cast(@tablenick as nvarchar(20)) + '  
    '  
  
    insert into @cmdtable (phase, cmdtext) values (2, @cmdpiece)  
  
    --  Phase 3: Add all code up to column list in update statement.  
    if 1=@maintainsmetadata  
    begin  
        set @cmdpiece=   
        '  
        declare @errcode    int  
        declare @METADATA_TYPE_UpsertLightweightProcessed tinyint'  
  
        if 1=@coltracked  
        begin  
            set @cmdpiece=@cmdpiece + '  
            declare @COLUMNS_ENUMERATED_ChangedOnly tinyint  
  
            set @COLUMNS_ENUMERATED_ChangedOnly= 0'  
        end  
        else  
        begin  
            set @cmdpiece=@cmdpiece + '  
            declare @COLUMNS_ENUMERATED_AllOnOtherReason tinyint  
  
            set @COLUMNS_ENUMERATED_AllOnOtherReason= 2'  
        end  
  
        set @cmdpiece=@cmdpiece + '  
        set @METADATA_TYPE_UpsertLightweightProcessed= 11  
  
        begin tran  
        save tran tran_lws_updproc  
          
        update dbo.MSmerge_rowtrack  
            set      
                changetype= @METADATA_TYPE_UpsertLightweightProcessed,   
                rowvector= @rowvector,   
                changedcolumns= null,  
                columns_enumeration= ' + @enumtype_str + ',  
                changed= sys.fn_MSdayasnumber(getdate()),  
                sync_cookie= null  
            where tablenick = @tablenick and rowguid = @rowguid  
  
        if @@rowcount = 0  
        begin  
            insert into dbo.MSmerge_rowtrack  
            (  
                tablenick,   
                rowguid,   
                changetype,   
                rowvector,   
                changedcolumns,   
                columns_enumeration,   
                changed,   
                sync_cookie  
            )  
            values  
            (  
                @tablenick,   
                @rowguid,   
                @METADATA_TYPE_UpsertLightweightProcessed,   
                @rowvector,   
                null,   
                ' + @enumtype_str + ',   
                sys.fn_MSdayasnumber(getdate()),   
                null  
            )  
  
            if @@rowcount <> 1  
            begin  
                set @errcode= 3  
                goto Failure  
            end  
        end  
  
        update ' + @qualified_name + '  
            set'  
    end --  1=@maintainsmetadata  
    else  
    begin  
        set @cmdpiece=   
        '  
        declare @errcode    int  
  
        update ' + @qualified_name + '  
            set'  
    end  
      
    insert into @cmdtable (phase, cmdtext) values (3, @cmdpiece)  
  
    --  Phase 4: Add sequence of <column=value> in update statement. Will be done later  
  
    --  Phase 5: Close update statement, and complete the stored proc.  
    set @cmdpiece= '  
        where rowguidcol = @rowguid  
          
    if (@@rowcount <> 1)  
    begin  
        set @errcode= 3  
        goto Failure  
    end  
    else  
    begin  
        set @errcode= 1  
        delete from dbo.MSmerge_metadataaction_request  
            where tablenick=@tablenick and rowguid=@rowguid  
                  
        goto Done  
    end'  
  
    if 1 = @maintainsmetadata  
    begin  
        set @cmdpiece= @cmdpiece + '  
        Failure:  
            rollback tran tran_lws_updproc  
  
        Done:  
            commit tran  
            return @errcode  
            '  
    end  
    else  
    begin  
        set @cmdpiece= @cmdpiece + '  
        Failure:  
        Done:  
            return @errcode  
            '  
    end  
  
    insert into @cmdtable (phase, cmdtext) values (5, @cmdpiece)  
  
    --  Now we loop over the columns to complete the command.  
    --  We omit computed, identity, and timestamp columns.  
  
    select @id= object_id(@qualified_name)  
    if @id is null return (1)  
      
    set @columnordinal= 0  
    set @previouscolid= -1  
    set @comma= ''  
    while (1=1)  
    begin  
        set @columnordinal= @columnordinal + 1  
          
        set @colid= (select min(column_id) from sys.columns   
                        where object_id = @id and   
                              column_id > @previouscolid and  
                              is_computed = 0 and  
                              is_identity = 0 and    --  Identity column  
                              system_type_id <> type_id('timestamp'))  
  
        if @colid is null  
            break  
  
        set @previouscolid= @colid  
  
        select   
            @colname= quotename(name),   
            @typename= type_name(system_type_id),  
            @len= max_length,  
            @prec= precision,   
            @scale= scale,  
            @isrowguidcol= is_rowguidcol  
            from sys.columns   
            where object_id = @id and column_id = @colid  
  
        if @typename='nvarchar' or @typename='nchar' --  a unit of nchar takes 2 bytes  
            select @len= @len/2  
  
        exec @retcode= sys.sp_MSmaptype @typename out, @len, @prec, @scale  
        if @@error<>0 or @retcode <>0 return (1)  
  
        --  Phase 1: Add column to procedure arguments list.  
        --             The list also contains the rowguidcol.  
        select @argname= '@p' + convert(nvarchar, @columnordinal)  
        set @cmdpiece= ',  
        ' + @argname + ' ' + @typename + '=null'  
  
        insert into @cmdtable (phase, cmdtext) values (1, @cmdpiece)  
  
        --  Phase 4: Add sequence of <column=value> in update statement.  
        --             Unlike in the argument list of phase 1, we now omit the rowguidcol.  
        if @isrowguidcol = 1  
            continue  
  
        set @cmdpiece= @comma + '  
            ' + @colname + '= case' + '  
                when ' + @argname + ' is not null then ' + @argname + '  
                when @setnullbm =0x00 then ' + @colname + '  
                when 1 = sys.fn_MStestbit(@setnullbm, ' + convert(nvarchar, @columnordinal) + ') then null  
                else ' + @colname + '  
            end'  
  
        insert into @cmdtable (phase, cmdtext) values (4, @cmdpiece)  
  
        set @comma= ', '  
    end  
  
    --  Now we select out the command text pieces in proper order so that our caller,  
    --  xp_execresultset, will execute the command that creates the stored procedure.  
    select cmdtext from @cmdtable order by phase, step  
  
    return 0