[CASSANDRA-1704] CQL reads (aka SELECT)

• Type: Sub-task
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.8 beta 1
• Component/s: Legacy/CQL
• Assignee: Eric Evans
• Reporter: Eric Evans

Authors

Eric Evans

• Created: 04/Nov/10 14:06
• Updated: 16/Apr/19 09:33
• Resolved: 20/Jan/11 22:10

Description

Data access specification and implementation for CQL.

This corresponds to the following RPC methods:

• get()
• get_slice()
• get_count()
• multiget_slice()
• multiget_count()
• get_range_slices()
• get_indexed_slices()

The initial check-in to trunk/ uses a syntax that looks like:

SELECT (FROM)? <CF> [USING CONSISTENCY.<LVL>] WHERE <EXPRESSION> [ROWLIMIT X] [COLLIMIT Y] [ASC|DESC]

Where:

• <CF> is the column family name.
• <EXPRESSION> consists of relations chained by the AND keyword.
• <LVL> corresponds to one of the enum values in the RPC interface(s).

What is still undone:

• Support for indexes
• Counts
• Complete test coverage

And of course, all of this is still very much open to further discussion.