weizihan0110 commented on a change in pull request #2468:
URL: https://github.com/apache/iotdb/pull/2468#discussion_r579601730
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File path: server/src/main/java/org/apache/iotdb/db/metadata/mnode/MNode.java
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@@ -233,4 +235,20 @@ void serializeChildren(MLogWriter logWriter) throws
IOException {
entry.getValue().serializeTo(logWriter);
}
}
+
+ public void replaceChild(String measurement, MNode newChildNode) {
+ MNode oldChildNode = this.getChild(measurement);
+ if (oldChildNode == null) {
+ return;
+ }
+ Map<String, MNode> grandChildren = oldChildNode.getChildren();
+ // newChildNode builds parent-child relationship
+ newChildNode.setChildren(grandChildren);
+ grandChildren.forEach(
+ (grandChildName, grandChildNode) ->
grandChildNode.setParent(newChildNode));
Review comment:
Thanks a lot for your reviews. I've already fixed it.
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