79 lines
2.5 KiB
Go
79 lines
2.5 KiB
Go
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// Copyright 2013 The ql Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSES/QL-LICENSE file.
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// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package evaluator
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import (
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"github.com/juju/errors"
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"github.com/pingcap/tidb/context"
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"github.com/pingcap/tidb/mysql"
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"github.com/pingcap/tidb/sessionctx/db"
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"github.com/pingcap/tidb/sessionctx/variable"
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)
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// See: https://dev.mysql.com/doc/refman/5.7/en/information-functions.html
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func builtinDatabase(args []interface{}, ctx context.Context) (v interface{}, err error) {
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d := db.GetCurrentSchema(ctx)
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if d == "" {
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return nil, nil
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}
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return d, nil
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}
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func builtinFoundRows(arg []interface{}, ctx context.Context) (interface{}, error) {
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data := variable.GetSessionVars(ctx)
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if data == nil {
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return nil, errors.Errorf("Missing session variable when evalue builtin")
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}
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return data.FoundRows, nil
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}
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// See: https://dev.mysql.com/doc/refman/5.7/en/information-functions.html#function_current-user
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// TODO: The value of CURRENT_USER() can differ from the value of USER(). We will finish this after we support grant tables.
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func builtinCurrentUser(args []interface{}, ctx context.Context) (v interface{}, err error) {
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data := variable.GetSessionVars(ctx)
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if data == nil {
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return nil, errors.Errorf("Missing session variable when evalue builtin")
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}
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return data.User, nil
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}
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func builtinUser(args []interface{}, ctx context.Context) (v interface{}, err error) {
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data := variable.GetSessionVars(ctx)
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if data == nil {
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return nil, errors.Errorf("Missing session variable when evalue builtin")
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}
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return data.User, nil
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}
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func builtinConnectionID(args []interface{}, ctx context.Context) (v interface{}, err error) {
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data := variable.GetSessionVars(ctx)
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if data == nil {
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return nil, errors.Errorf("Missing session variable when evalue builtin")
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}
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return data.ConnectionID, nil
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}
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func builtinVersion(args []interface{}, ctx context.Context) (v interface{}, err error) {
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return mysql.ServerVersion, nil
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}
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