[HHH-19365]!appendDatetimeFormat

Author: liubao68

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

@@ -1073,27 +1073,7 @@ public boolean supportsTemporalLiteralOffset() {
 
 	@Override
 	public void appendDatetimeFormat(SqlAppender appender, String format) {
-		appender.appendSql( datetimeFormat( format ).result() );
-	}
-
-	public Replacer datetimeFormat(String format) {
-		return OracleDialect.datetimeFormat( format, true, false )
-				.replace("SSSSSS", "US")
-				.replace("SSSSS", "US")
-				.replace("SSSS", "US")
-				.replace("SSS", "MS")
-				.replace("SS", "MS")
-				.replace("S", "MS")
-				//use ISO day in week, as per DateTimeFormatter
-				.replace("ee", "ID")
-				.replace("e", "fmID")
-				//TZR is TZ
-				.replace("zzz", "TZ")
-				.replace("zz", "TZ")
-				.replace("z", "TZ")
-				.replace("xxx", "OF")
-				.replace("xx", "OF")
-				.replace("x", "OF");
+		throw new UnsupportedOperationException( "GaussDB not support datetime format yet" );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/identity/GaussDBIdentityColumnSupport.java

@@ -12,10 +12,6 @@
 public class GaussDBIdentityColumnSupport extends IdentityColumnSupportImpl {
 
 	public static final GaussDBIdentityColumnSupport INSTANCE = new GaussDBIdentityColumnSupport();
-	@Override
-	public boolean supportsIdentityColumns() {
-		return false;
-	}
 
 	@Override
 	public String getIdentitySelectString(String table, String column, int type) {