JdbcQueryTableValueFunction.java

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package org.apache.doris.tablefunction;

import org.apache.doris.analysis.TupleDescriptor;
import org.apache.doris.catalog.Column;
import org.apache.doris.catalog.JdbcTable;
import org.apache.doris.catalog.TableIf.TableType;
import org.apache.doris.common.AnalysisException;
import org.apache.doris.datasource.jdbc.JdbcExternalCatalog;
import org.apache.doris.datasource.jdbc.source.JdbcScanNode;
import org.apache.doris.planner.PlanNodeId;
import org.apache.doris.planner.ScanNode;
import org.apache.doris.qe.SessionVariable;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.util.List;
import java.util.Map;

public class JdbcQueryTableValueFunction extends QueryTableValueFunction {
    public static final Logger LOG = LogManager.getLogger(JdbcQueryTableValueFunction.class);

    public JdbcQueryTableValueFunction(Map<String, String> params) throws AnalysisException {
        super(params);
    }

    @Override
    public List<Column> getTableColumns() throws AnalysisException {
        JdbcExternalCatalog catalog = (JdbcExternalCatalog) catalogIf;
        return catalog.getColumnsFromQuery(query);
    }

    @Override
    public ScanNode getScanNode(PlanNodeId id, TupleDescriptor desc, SessionVariable sv) {
        JdbcExternalCatalog catalog = (JdbcExternalCatalog) catalogIf;
        JdbcTable jdbcTable = new JdbcTable(1, desc.getTable().getName(), desc.getTable().getFullSchema(),
                TableType.JDBC);
        catalog.configureJdbcTable(jdbcTable, desc.getTable().getName());
        desc.setTable(jdbcTable);
        return new JdbcScanNode(id, desc, true, query);
    }
}