COLLATION_MISMATCH error class
SQLSTATE: 42P21
Could not determine which collation to use for string functions and operators.
EXPLICIT
Error occurred due to the mismatch between explicit collations: <explicitTypes>
. Decide on a single explicit collation and remove others.
IMPLICIT
Error occurred due to the mismatch between multiple implicit non-default collations. Use COLLATE function to set the collation explicitly.