Commits on Aug 3, 2023

1. fix: EXPOSED-116 UUID conversion error with upsert in H2 …

   Using a UUID column as a key constraint in H2's MERGE INTO -- USING statement
   was failing with: org.h2.jdbc.JdbcSQLDataException: Data conversion error converting
   "U&'\\fffdK\\fffdS\\001bJr\\fffdG%\\fffdE\\00100\\fffd' (TESTER: ""ID"" UUID NOT NULL)";
   
   This error occurs because the statement uses a derived column list to merge ON
   (T.ID=S.ID), so the UUID as a ByteArray in T.ID needs to be converted internally
   to compare with the String in S.ID. This error goes away if a regular integer
   id column is used or if the key constraint is swapped with another.
   
   The error also goes away if the identical MERGE statement is placed in an exec()
   directly, indicating that the issue lies with how Exposed sends UUID values to
   the H2 database.
   
   Switching the sent value from a ByteArray to a String allows comparison without
   conversion. A String is still one of 3 acceptable ways to store a UUID in H2 and
   sending a String still results in a UUID being retrieved back from the database.

   

   bog-walk committed Aug 3, 2023
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