@Override
  public Statement visitShowTriggers(IoTDBSqlParser.ShowTriggersContext ctx) {
    return new ShowTriggersStatement();
  }
Check and set datatype, encoding, compressor.

@throws SemanticException if encoding or dataType meets error handling
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/parser/ASTVisitor.java