Method sql_info

src/db/sqlengine/parser/zvec_sql_parser.cc:94–127

}

SQLInfo::Ptr ZVecSQLParser::sql_info(VoidPtr tree) {
  ParseTree *parseTree = reinterpret_cast<ParseTree *>(tree);
  SQLParser::Compilation_unitContext *compilation_unit_node =
      (SQLParser::Compilation_unitContext *)parseTree;
  SQLParser::Unit_statementContext *unit_statement_node =
      (SQLParser::Unit_statementContext *)compilation_unit_node->children[0];

  SQLInfo::SQLType sqlType = sql_type(unit_statement_node);
  if (sqlType == SQLInfo::SQLType::NONE) {
    return nullptr;
  }

  BaseInfo::Ptr baseInfo = nullptr;
  switch (sqlType) {
    case SQLInfo::SQLType::SELECT:
      baseInfo =
          select_info(unit_statement_node->dql_statement()->select_statement());
      break;
    default:
      break;
  }

  if (baseInfo == nullptr) {
    return nullptr;
  }

  if (baseInfo->validate() == false) {
    err_msg_ = baseInfo->err_msg();
    return nullptr;
  }

  SQLInfo::Ptr sqlInfo = std::make_shared<SQLInfo>(sqlType, baseInfo);
  return sqlInfo;
}

SQLInfo::SQLType ZVecSQLParser::sql_type(VoidPtr node) {
  SQLParser::Unit_statementContext *unit_statement_node =