saboluo opened a new issue #4306: Why do distributed primary keys need to be retrieved in reverse order in ShardingGeneratedKeyInsertValueParameterRewriter.rewrite URL: https://github.com/apache/incubator-shardingsphere/issues/4306 ## Question **For English only**, other languages will not accept. Before asking a question, make sure you have: - Googled your question. - Searched open and closed [GitHub issues](https://github.com/apache/incubator-shardingsphere/issues). - Read documentation: [ShardingSphere Doc](https://shardingsphere.apache.org/document/current/en/overview). Please pay attention on issues you submitted, because we maybe need more details. If no response **more than 7 days** and we cannot reproduce it on current information, we will **close it**. source code class ShardingGeneratedKeyInsertValueParameterRewriter `public void rewrite(final ParameterBuilder parameterBuilder, final SQLStatementContext sqlStatementContext, final List<Object> parameters) { Preconditions.checkState(sqlRouteResult.getGeneratedKey().isPresent()); ((GroupedParameterBuilder) parameterBuilder).setDerivedColumnName(sqlRouteResult.getGeneratedKey().get().getColumnName()); **Iterator<Comparable<?>> generatedValues = sqlRouteResult.getGeneratedKey().get().getGeneratedValues().descendingIterator();** int count = 0; int parametersCount = 0; for (List<Object> each : ((InsertSQLStatementContext) sqlStatementContext).getGroupedParameters()) { parametersCount += ((InsertSQLStatementContext) sqlStatementContext).getInsertValueContexts().get(count).getParametersCount(); Comparable<?> generatedValue = generatedValues.next(); if (!each.isEmpty()) { ((GroupedParameterBuilder) parameterBuilder).getParameterBuilders().get(count).addAddedParameters(parametersCount, Lists.<Object>newArrayList(generatedValue)); } count++; } }`
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