Compare collation keys generated by collate_key with similar semantics
as strcmp.
See also collate_cmp_func if you need a version of this function that works as a CompareDataFunc.
The default implementation in Analyzer just uses strcmp.
| this |
The analyzer to use when comparing collation keys |
| key1 |
The first collation key to compare |
| key2 |
The second collation key to compare |
|
-1, 0 or 1, if |