@Override
  public Statement visitShowChildPaths(IoTDBSqlParser.ShowChildPathsContext ctx) {
    if (ctx.prefixPath() != null) {
      return new ShowChildPathsStatement(parsePrefixPath(ctx.prefixPath()));
    } else {
      return new ShowChildPathsStatement(new PartialPath(SqlConstant.getSingleRootArray()));
    }
  }
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