AlterDatabaseRenameCommand.java

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package org.apache.doris.nereids.trees.plans.commands.alter;

import org.apache.doris.catalog.Env;
import org.apache.doris.common.ErrorCode;
import org.apache.doris.common.ErrorReport;
import org.apache.doris.common.FeNameFormat;
import org.apache.doris.common.util.InternalDatabaseUtil;
import org.apache.doris.datasource.InternalCatalog;
import org.apache.doris.mysql.privilege.PrivPredicate;
import org.apache.doris.nereids.trees.plans.PlanType;
import org.apache.doris.nereids.trees.plans.commands.AlterCommand;
import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor;
import org.apache.doris.qe.ConnectContext;
import org.apache.doris.qe.StmtExecutor;

/**
 * Represents the command for ALTER DATABASE db_name RENAME new_db_name.
 */
public class AlterDatabaseRenameCommand extends AlterCommand {
    private final String dbName;
    private final String newDbName;

    public AlterDatabaseRenameCommand(String dbName, String newDbName) {
        super(PlanType.ALTER_DATABASE_RENAME_COMMAND);
        this.dbName = dbName;
        this.newDbName = newDbName;
    }

    @Override
    public void doRun(ConnectContext ctx, StmtExecutor executor) throws Exception {
        InternalDatabaseUtil.checkDatabase(dbName, ConnectContext.get());
        if (!Env.getCurrentEnv().getAccessManager()
                .checkDbPriv(ConnectContext.get(), InternalCatalog.INTERNAL_CATALOG_NAME, dbName,
                        PrivPredicate.ALTER)) {
            ErrorReport.reportAnalysisException(ErrorCode.ERR_DBACCESS_DENIED_ERROR, ctx.getQualifiedUser(), dbName);
        }

        FeNameFormat.checkDbName(newDbName);
        Env.getCurrentInternalCatalog().renameDatabase(dbName, newDbName);
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitAlterDatabaseRenameCommand(this, context);
    }

    public String toSql() {
        return "ALTER DATABASE " + dbName + " RENAME " + newDbName;
    }
}