[remove datanode] Delete the SQL of removing multiple datanodes at the same time #14862

Author: HxpSerein

iotdb-core/antlr/src/main/antlr4/org/apache/iotdb/db/qp/sql/IoTDBSqlParser.g4

@@ -552,7 +552,7 @@ verifyConnection
 
 // ---- Remove DataNode
 removeDataNode
-    : REMOVE DATANODE dataNodeId=INTEGER_LITERAL (COMMA dataNodeId=INTEGER_LITERAL)*
+    : REMOVE DATANODE dataNodeId=INTEGER_LITERAL
     ;
 
 // ---- Remove ConfigNode

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/parser/ASTVisitor.java

@@ -239,7 +239,6 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.io.BaseEncoding;
 import org.antlr.v4.runtime.Token;
-import org.antlr.v4.runtime.tree.ParseTree;
 import org.antlr.v4.runtime.tree.TerminalNode;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.tsfile.common.conf.TSFileDescriptor;
@@ -4226,12 +4225,9 @@ public Statement visitRemoveRegion(IoTDBSqlParser.RemoveRegionContext ctx) {
 
   @Override
   public Statement visitRemoveDataNode(IoTDBSqlParser.RemoveDataNodeContext ctx) {
-    List<Integer> dataNodeIDs =
-        ctx.INTEGER_LITERAL().stream()
-            .map(ParseTree::getText)
-            .map(Integer::parseInt)
-            .collect(Collectors.toList());
-    return new RemoveDataNodeStatement(dataNodeIDs);
+    List<Integer> nodeIds =
+        Collections.singletonList(Integer.parseInt(ctx.INTEGER_LITERAL().getText()));
+    return new RemoveDataNodeStatement(nodeIds);
   }
 
   @Override

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/sql/parser/AstBuilder.java

@@ -1185,10 +1185,7 @@ public Node visitRemoveRegionStatement(RelationalSqlParser.RemoveRegionStatement
   @Override
   public Node visitRemoveDataNodeStatement(RelationalSqlParser.RemoveDataNodeStatementContext ctx) {
     List<Integer> nodeIds =
-        ctx.INTEGER_VALUE().stream()
-            .map(TerminalNode::getText)
-            .map(Integer::valueOf)
-            .collect(Collectors.toList());
+        Collections.singletonList(Integer.parseInt(ctx.INTEGER_VALUE().getText()));
     return new RemoveDataNode(nodeIds);
   }
 

iotdb-core/relational-grammar/src/main/antlr4/org/apache/iotdb/db/relational/grammar/sql/RelationalSql.g4

@@ -497,7 +497,7 @@ removeRegionStatement
     ;
 
 removeDataNodeStatement
-    : REMOVE DATANODE dataNodeId=INTEGER_VALUE (',' dataNodeId=INTEGER_VALUE)*
+    : REMOVE DATANODE dataNodeId=INTEGER_VALUE
     ;
 
 removeConfigNodeStatement