Before (including customers):

OLAKE_DIRECTORY/streams.json

"selected_streams": {
        "otter_db": [
            {
                "stream_name": "order",
                "partition_regex": "",
                "normalization": false,
                "append_only": false,
                "chunk_column": "",         //column name to be specified
            },
            {
                "stream_name": "customer",
                "partition_regex": "",
                "normalization": false,
                "append_only": false,
                "chunk_column": "",         //column name to be specified
            }
        ]
    },

After (to exclude customers):

OLAKE_DIRECTORY/streams.json

"selected_streams": {
        "otter_db": [
            {
                "stream_name": "order",
                "partition_regex": "",
                "normalization": false,
                "append_only": false,
                "chunk_column": "",         //column name to be specified  
            },
        ]
    },