Question

通常可以在Java中将两个JavaRDD对象（如矩阵）相乘吗？例如，如果我创建DenseMatrix，我可以使用方法

declare @TABLE_NAME sysname, @TABLE_SCHEMA sysname, @COLUMN_NAME sysname
declare @TABLE sysname, @sql nvarchar(max)
declare table_cursor Cursor
    For Select TABLE_NAME, TABLE_SCHEMA, COLUMN_NAME From INFORMATION_SCHEMA.COLUMNS 
    Where COLUMN_NAME like 'xxx' -- and data_type  '' ... and TABLE_NAME like 'xyz%' ...  and TABLE_SCHEMA like ...

open table_cursor
Fetch Next From table_cursor Into @TABLE_NAME, @TABLE_SCHEMA, @COLUMN_NAME;

While @@FETCH_STATUS = 0
Begin
    Set @TABLE = quotename(@TABLE_SCHEMA) + '.' + quotename(@TABLE_NAME)
    set @sql = 'Update ' + @TABLE + ' set ' + @COLUMN_NAME + ' = UPPER(' + @COLUMN_NAME + ')'
    print @sql
    -- uncomment next like if you really want to execute them
    --exec sp_executesql @sql
    Fetch Next From table_cursor Into @TABLE_NAME, @TABLE_SCHEMA, @COLUMN_NAME;
End

Close table_cursor
Deallocate table_cursor

我想为两个JavaRDD对象找到类似的简单实现。

JavaRDD对象的乘法

0 个答案: