BigTable: Can two column qualifiers from different column family have same name?

Question

My questions is: "Can two column qualifiers from different column family have same name?"

I went through Google Documentation but couldn't get my answer: https://cloud.google.com/bigtable/docs/schema-design#column_families_and_column_qualifiers

I have a scenario where I am storing cumulative/avg/min/max of some measurements (pressure, temperature, volume and many more).

I am planning to store data:

col-family:col:value

cum:pressure:<value>

avg:temperature:<value>

avg:pressure:<value>

Its just an example above. Now from the example first and third entry has different column family but same column name. Is this allowed in BigTable?

Please help!

Answer 1

As mentioned in the Overview of Cloud Bigtable documentation, in Bigtable the rows are basically a collection of key/value entries, where the keys are composed of a combination of the column family and the column qualifier. So as long as you don’t have the same qualifier inside the same family you are good to go.