Avoid full scans flags #137962
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Avoid full scans flags #137962
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This is a mechanical change that will set up the ability to use CostFlags in a future commit. Release note: None
Informs cockroachdb#79683 Release note (sql change): Added support for a new index hint, AVOID_FULL_SCAN, which will prevent the optimizer from planning a full scan for the specified table if any other plan is possible. The hint can be used in the same way as other existing index hints. For example, SELECT * FROM table_name@{AVOID_FULL_SCAN};. Note that a full scan of a partial index may still be preferred by the optimizer, unless AVOID_FULL_SCAN is used in combination with a specific partial index via FORCE_INDEX=index_name. This hint is similar to NO_FULL_SCAN, but will not error if a full scan cannot be avoided.
Fixes cockroachdb#79683 Release note (sql change): Added a new session setting avoid_full_table_scans_in_mutations, which when set to true, causes the optimizer to avoid planning full table scans for mutation queries if any other plan is possible. It now defaults to true.
Removed a comment that references a function parameter that no longer exists. Release note: None
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