Brett Brett - 3 months ago 25
reST (reStructuredText) Question

Filter Azure Table Storage by RowKey and StartsWith using the Python SDK

I have seen that Azure Table Storage supports querying records by a partial

RowKey
(in addition to the
PartitionKey
) (C# example here).

However, I can't find anything related to this in the actual docs on filtering query results (here).

I am trying to using the Python Azure-Storage SDK to query a subset of
PartitionKey
and
RowKey
combinations where the
RowKey
starts with a certain string. I have the code (which works, but does not do correct filtering any row keys):

from azure.storage.table import TableService
table_service = TableService(account_name=ACCOUNT_NAME, account_key=ACCOUNT_KEY)
entities = table_service.query_entities('mystoragetable', filter='PartitionKey eq mypartitionkey"', num_results=10)


However, I can't figure out the syntax for also adding a partial (
startswith
) constraint to the filter.

Has anyone had any experience with filtering Azure Table Storage queries by partial
RowKey
strings?
I am at a loss here; however, it seems to be possible via the
C#
code in the example above.

If there are any extra docs about how to do this via a REST call, I can probably translate that into the Python usage.

Answer

Assuming your RowKey values contains words and you only want to filter the words starting with a and b, this is what you would add to your query:

(RowKey ge 'a' and RowKey lt 'c') ==> (RowKey >= 'a' && RowKey < 'c')

So your code would be something like:

entities = table_service.query_entities('mystoragetable', filter="PartitionKey eq 'mypartitionkey' and RowKey ge '<starts with substring>'", num_results=10)
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