HHH-18892 Fix SQL errors with hex and hash functions on HANA

Author: beikov

hibernate-core/src/main/java/org/hibernate/dialect/HANADialect.java

@@ -518,9 +518,9 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 //		functionFactory.xmlextract();
 		functionFactory.generateSeries_hana( getMaximumSeriesSize() );
 
-		functionFactory.hex( "to_hex(?1)" );
-		functionFactory.sha( "hash_sha256(?1)" );
-		functionFactory.md5( "hash_md5(?1)" );
+		functionFactory.hex( "bintohex(?1)" );
+		functionFactory.sha( "hash_sha256(to_binary(?1))" );
+		functionFactory.md5( "hash_md5(to_binary(?1))" );
 	}
 
 	/**