@Wangminhao Gou I think you can reference the JdbcConvention , that would push queries to JDBC datasource as much as possible,.
勾王敏浩 <[email protected]> 于2019年5月9日周四 下午4:18写道： > Hi， > My name is Wangminhao Gou. I've read the CSV example of calcite and > written several other adapters following the CSV adapter(However, all are > scannable). Now I'm going to write the adapter for IoTDB. > However，Considering performance, we don't want to just implement > ScannableTable. We want to push as many operations as possible down to > IoTDB. > Here are my questions: > 1.We want to get the user's query statement first. Turn this query > statement into an IoTDB recognizable query. Use IoTDB to process the query > and get a resultSet. Then use this resultSet to perform scan operations and > stitch it together into the final resultSet of calcite. How can I get the > query in the adapter and can I get the resultSet first and then put it > together? > 2.If my above considerations cannot be realized, is there any other way to > push queries down to the IoTDB database? > > > Best Regards, > Wangminhao Gou > >
