Comments (1)
This query will check for exactly the same set of columns as keys:
SELECT indrelid::regclass as relation,
a.indexrelid::regclass as index1,
b.indexrelid::regclass as index2
FROM pg_index a JOIN pg_index b USING (indrelid, indkey)
WHERE a.indexrelid != b.indexrelid;
It might be interesting to check if one index is redundant in the sense that there is another index that has the same set of initial columns. Something like:
CREATE TABLE foo (a int, b int, c int);
CREATE INDEX ON foo(a,b);
CREATE INDEX ON foo(a,b,c);
There seems to be a few customer cases with this kind of situation, especially if the customer creates a covering index but forget to remove the old index.
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Related Issues (16)
- Provide summary table for suggestions HOT 3
- Refactor rules definition HOT 1
- Generate messages using template
- Add unit tests for rules
- Check that compress_chunk_interval is used correctly HOT 1
- Error when timescaledb not installed in source database
- Error when timescaledb database contains dropped chunks with tombstone HOT 1
- Find chunks that do not have same permissions as hypertable
- Check that all chunks are accounted for HOT 1
- Check for continuous aggregates which haven't been migrated from finalized format
- List available rules and their description
- Recommend suitable segmentby and orderby columns for compression
- Check that all hypertable have valid users for chunks and compressed chunks
- Support PostgreSQL URLs for connection HOT 5
- Improve error handling
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