Column qualifier for multiple columns in a column family.

[piyushkhetan]

I have a hbase table with multiple columns in a single column family let say "c".
In order to save disk space this column family can be written to a single family qualifier and it will make only one row for a given rowkey.
How can I achieve this using this library.
I tried this catalog where I am trying to make "q_data" as my family qualifier.

{
"table":{"namespace":"default", "name":"spark_dense_string", "tableCoder":"PrimitiveType"},
"rowkey":"id:hist_timestamp",
"columns":{
"id":{"cf":"rowkey", "col":"id", "type":"string","length":"36"},
"hist_timestamp":{"cf":"rowkey", "col":"hist_timestamp", "type":"string"},
"q_data":{"cf":"c","col":"value", "type":"double"},
"q_data":{"cf":"c", "col":"est_val", "type":"double"},
"q_data":{"cf":"c","col":"replaced", "type":"smallint"}
}
}

Thanks in advance!

[jonashartwig]

I think if you change to this (according to documentation) it should work as you like:

{
"table":{"namespace":"default", "name":"spark_dense_string", "tableCoder":"PrimitiveType"},
"rowkey":"hist_timestamp",
"columns":{
"id":{"cf":"rowkey", "col":"hist_timestamp", "type":"string","length":"36"},
"hist_timestamp":{"cf":"rowkey", "col":"hist_timestamp", "type":"string"},
"q_data":{"cf":"c","col":"value", "type":"double"},
"q_data":{"cf":"c", "col":"est_val", "type":"double"},
"q_data":{"cf":"c","col":"replaced", "type":"smallint"}
}
}