New post
Question
· Feb 15, 2018

The Index on a String field

#SQL #Caché

I noticed that the subscript of the index map is actually the collated field (%SQLUPPER).

Is String the only data type going through this transformation? Any other data type would also go through this transformation?

Thanks. 

Discussion (1)0
Log in or sign up to continue
Eduard Lebedyuk · Feb 15, 2018

All datatypes go through the transformation.

The collation is determined in this order:

  1. If an index definition includes an explicitly specified collation for a property, the index uses that collation.
  2. If an index definition does not include an explicitly specified collation for a property, the index uses the collation explicitly specified in the property definition.
  3. If the property definition does not include an explicitly specified collation, then the index uses the collation that is the default for the property data type.
  4. If the property data type does not include an explicitly specified collation, then the index uses namespace default collation
  5. If the namespace default collation is not specified, then SQLUPPER is used.

Documentation.

0 0