Examples with ResetOptionHandler org.apache.drill.exec.planner.sql.handlers.ResetOptionHandler used on opensource projects

Example 1 with ResetOptionHandler

use of org.apache.drill.exec.planner.sql.handlers.ResetOptionHandler in project drill by apache.

the class DrillSqlWorker method getQueryPlan.

/**
 * Converts sql query string into query physical plan.
 *
 * @param context query context
 * @param sql sql query
 * @param textPlan text plan
 * @return query physical plan
 */
private static PhysicalPlan getQueryPlan(QueryContext context, String sql, Pointer<String> textPlan) throws ForemanSetupException, RelConversionException, IOException, ValidationException {
    final SqlConverter parser = new SqlConverter(context);
    injector.injectChecked(context.getExecutionControls(), "sql-parsing", ForemanSetupException.class);
    final SqlNode sqlNode = checkAndApplyAutoLimit(parser, context, sql);
    final AbstractSqlHandler handler;
    final SqlHandlerConfig config = new SqlHandlerConfig(context, parser);
    switch(sqlNode.getKind()) {
        case EXPLAIN:
            handler = new ExplainHandler(config, textPlan);
            context.setSQLStatementType(SqlStatementType.EXPLAIN);
            break;
        case SET_OPTION:
            if (sqlNode instanceof DrillSqlSetOption) {
                handler = new SetOptionHandler(context);
                context.setSQLStatementType(SqlStatementType.SETOPTION);
                break;
            }
            if (sqlNode instanceof DrillSqlResetOption) {
                handler = new ResetOptionHandler(context);
                context.setSQLStatementType(SqlStatementType.SETOPTION);
                break;
            }
        case DESCRIBE_TABLE:
            if (sqlNode instanceof DrillSqlDescribeTable) {
                handler = new DescribeTableHandler(config);
                context.setSQLStatementType(SqlStatementType.DESCRIBE_TABLE);
                break;
            }
        case DESCRIBE_SCHEMA:
            if (sqlNode instanceof SqlDescribeSchema) {
                handler = new DescribeSchemaHandler(config);
                context.setSQLStatementType(SqlStatementType.DESCRIBE_SCHEMA);
                break;
            }
            if (sqlNode instanceof SqlSchema.Describe) {
                handler = new SchemaHandler.Describe(config);
                context.setSQLStatementType(SqlStatementType.DESCRIBE_SCHEMA);
                break;
            }
        case CREATE_TABLE:
            handler = ((DrillSqlCall) sqlNode).getSqlHandler(config, textPlan);
            context.setSQLStatementType(SqlStatementType.CTAS);
            break;
        case SELECT:
            handler = new DefaultSqlHandler(config, textPlan);
            context.setSQLStatementType(SqlStatementType.SELECT);
            break;
        case DROP_TABLE:
        case CREATE_VIEW:
        case DROP_VIEW:
        case OTHER_DDL:
        case OTHER:
            if (sqlNode instanceof DrillSqlCall) {
                handler = ((DrillSqlCall) sqlNode).getSqlHandler(config);
                if (handler instanceof AnalyzeTableHandler || handler instanceof MetastoreAnalyzeTableHandler) {
                    context.setSQLStatementType(SqlStatementType.ANALYZE);
                } else if (handler instanceof RefreshMetadataHandler) {
                    context.setSQLStatementType(SqlStatementType.REFRESH);
                } else {
                    context.setSQLStatementType(SqlStatementType.OTHER);
                }
                break;
            }
        // fallthrough
        default:
            handler = new DefaultSqlHandler(config, textPlan);
            context.setSQLStatementType(SqlStatementType.OTHER);
    }
    // Determines whether result set should be returned for the query based on return result set option and sql node kind.
    // Overrides the option on a query level if it differs from the current value.
    boolean currentReturnResultValue = context.getOptions().getBoolean(ExecConstants.RETURN_RESULT_SET_FOR_DDL);
    boolean newReturnResultSetValue = currentReturnResultValue || !SqlKind.DDL.contains(sqlNode.getKind());
    if (newReturnResultSetValue != currentReturnResultValue) {
        context.getOptions().setLocalOption(ExecConstants.RETURN_RESULT_SET_FOR_DDL, true);
    }
    return handler.getPlan(sqlNode);
}