Examples with ShowTablesDesc org.apache.hadoop.hive.ql.ddl.table.info.show.tables.ShowTablesDesc used on opensource projects

Example 1 with ShowTablesDesc

use of org.apache.hadoop.hive.ql.ddl.table.info.show.tables.ShowTablesDesc in project hive by apache.

the class HCatSemanticAnalyzer method authorizeDDLWork.

@Override
protected void authorizeDDLWork(HiveSemanticAnalyzerHookContext cntxt, Hive hive, DDLWork work) throws HiveException {
    DDLDesc ddlDesc = work.getDDLDesc();
    if (ddlDesc instanceof ShowDatabasesDesc) {
        authorize(HiveOperation.SHOWDATABASES.getInputRequiredPrivileges(), HiveOperation.SHOWDATABASES.getOutputRequiredPrivileges());
    } else if (ddlDesc instanceof DropDatabaseDesc) {
        DropDatabaseDesc dropDb = (DropDatabaseDesc) ddlDesc;
        Database db = cntxt.getHive().getDatabase(dropDb.getDatabaseName());
        if (db != null) {
            // if above returned a null, then the db does not exist - probably a
            // "drop database if exists" clause - don't try to authorize then.
            authorize(db, Privilege.DROP);
        }
    } else if (ddlDesc instanceof DescDatabaseDesc) {
        DescDatabaseDesc descDb = (DescDatabaseDesc) ddlDesc;
        Database db = cntxt.getHive().getDatabase(descDb.getDatabaseName());
        authorize(db, Privilege.SELECT);
    } else if (ddlDesc instanceof SwitchDatabaseDesc) {
        SwitchDatabaseDesc switchDb = (SwitchDatabaseDesc) ddlDesc;
        Database db = cntxt.getHive().getDatabase(switchDb.getDatabaseName());
        authorize(db, Privilege.SELECT);
    } else if (ddlDesc instanceof ShowTablesDesc) {
        ShowTablesDesc showTables = (ShowTablesDesc) ddlDesc;
        String dbName = showTables.getDbName() == null ? SessionState.get().getCurrentDatabase() : showTables.getDbName();
        authorize(cntxt.getHive().getDatabase(dbName), Privilege.SELECT);
    } else if (ddlDesc instanceof DescTableDesc) {
        // we should be careful when authorizing table based on just the
        // table name. If columns have separate authorization domain, it
        // must be honored
        DescTableDesc descTable = (DescTableDesc) ddlDesc;
        String tableName = extractTableName(descTable.getDbTableName());
        authorizeTable(cntxt.getHive(), tableName, Privilege.SELECT);
    } else if (ddlDesc instanceof ShowTableStatusDesc) {
        ShowTableStatusDesc showTableStatus = (ShowTableStatusDesc) ddlDesc;
        String dbName = showTableStatus.getDbName() == null ? SessionState.get().getCurrentDatabase() : showTableStatus.getDbName();
        authorize(cntxt.getHive().getDatabase(dbName), Privilege.SELECT);
    } else if (ddlDesc instanceof AlterTableDropPartitionDesc) {
        AlterTableDropPartitionDesc dropPartition = (AlterTableDropPartitionDesc) ddlDesc;
        // this is actually a ALTER TABLE DROP PARITITION statement
        for (AlterTableDropPartitionDesc.PartitionDesc partSpec : dropPartition.getPartSpecs()) {
            // partitions are not added as write entries in drop partitions in Hive
            Table table = hive.getTable(SessionState.get().getCurrentDatabase(), dropPartition.getTableName());
            List<Partition> partitions = null;
            try {
                partitions = hive.getPartitionsByFilter(table, partSpec.getPartSpec().getExprString());
            } catch (Exception e) {
                throw new HiveException(e);
            }
            for (Partition part : partitions) {
                authorize(part, Privilege.DROP);
            }
        }
    } else if (ddlDesc instanceof ShowPartitionsDesc) {
        ShowPartitionsDesc showParts = (ShowPartitionsDesc) ddlDesc;
        String tableName = extractTableName(showParts.getTabName());
        authorizeTable(cntxt.getHive(), tableName, Privilege.SELECT);
    } else if (ddlDesc instanceof AlterTableSetLocationDesc) {
        AlterTableSetLocationDesc alterTable = (AlterTableSetLocationDesc) ddlDesc;
        Table table = hive.getTable(SessionState.get().getCurrentDatabase(), Utilities.getDbTableName(alterTable.getDbTableName())[1], false);
        Partition part = null;
        if (alterTable.getPartitionSpec() != null) {
            part = hive.getPartition(table, alterTable.getPartitionSpec(), false);
        }
        String newLocation = alterTable.getLocation();
        /* Hcat requires ALTER_DATA privileges for ALTER TABLE LOCATION statements
      * for the old table/partition location and the new location.
      */
        if (part != null) {
            // authorize for the old
            authorize(part, Privilege.ALTER_DATA);
            // location, and new location
            part.setLocation(newLocation);
            authorize(part, Privilege.ALTER_DATA);
        } else {
            // authorize for the old
            authorize(table, Privilege.ALTER_DATA);
            // location, and new location
            table.getTTable().getSd().setLocation(newLocation);
            authorize(table, Privilege.ALTER_DATA);
        }
    }
}