mirror of
https://github.com/go-gitea/gitea.git
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* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
206 lines
6.2 KiB
Go
206 lines
6.2 KiB
Go
// Copyright 2016 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 executor
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import (
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"strings"
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"github.com/juju/errors"
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"github.com/pingcap/tidb/ast"
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"github.com/pingcap/tidb/context"
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"github.com/pingcap/tidb/infoschema"
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"github.com/pingcap/tidb/model"
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"github.com/pingcap/tidb/mysql"
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"github.com/pingcap/tidb/privilege"
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"github.com/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/terror"
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)
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// DDLExec represents a DDL executor.
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type DDLExec struct {
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Statement ast.StmtNode
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ctx context.Context
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is infoschema.InfoSchema
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done bool
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}
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// Fields implements Executor Fields interface.
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func (e *DDLExec) Fields() []*ast.ResultField {
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return nil
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}
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// Next implements Execution Next interface.
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func (e *DDLExec) Next() (*Row, error) {
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if e.done {
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return nil, nil
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}
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var err error
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switch x := e.Statement.(type) {
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case *ast.TruncateTableStmt:
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err = e.executeTruncateTable(x)
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case *ast.CreateDatabaseStmt:
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err = e.executeCreateDatabase(x)
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case *ast.CreateTableStmt:
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err = e.executeCreateTable(x)
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case *ast.CreateIndexStmt:
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err = e.executeCreateIndex(x)
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case *ast.DropDatabaseStmt:
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err = e.executeDropDatabase(x)
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case *ast.DropTableStmt:
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err = e.executeDropTable(x)
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case *ast.DropIndexStmt:
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err = e.executeDropIndex(x)
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case *ast.AlterTableStmt:
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err = e.executeAlterTable(x)
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}
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if err != nil {
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return nil, errors.Trace(err)
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}
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e.done = true
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return nil, nil
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}
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// Close implements Executor Close interface.
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func (e *DDLExec) Close() error {
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return nil
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}
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func (e *DDLExec) executeTruncateTable(s *ast.TruncateTableStmt) error {
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table, ok := e.is.TableByID(s.Table.TableInfo.ID)
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if !ok {
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return errors.New("table not found, should never happen")
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}
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return table.Truncate(e.ctx)
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}
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func (e *DDLExec) executeCreateDatabase(s *ast.CreateDatabaseStmt) error {
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var opt *ast.CharsetOpt
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if len(s.Options) != 0 {
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opt = &ast.CharsetOpt{}
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for _, val := range s.Options {
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switch val.Tp {
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case ast.DatabaseOptionCharset:
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opt.Chs = val.Value
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case ast.DatabaseOptionCollate:
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opt.Col = val.Value
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}
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}
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}
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err := sessionctx.GetDomain(e.ctx).DDL().CreateSchema(e.ctx, model.NewCIStr(s.Name), opt)
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if err != nil {
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if terror.ErrorEqual(err, infoschema.DatabaseExists) && s.IfNotExists {
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err = nil
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}
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}
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return errors.Trace(err)
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}
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func (e *DDLExec) executeCreateTable(s *ast.CreateTableStmt) error {
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ident := ast.Ident{Schema: s.Table.Schema, Name: s.Table.Name}
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err := sessionctx.GetDomain(e.ctx).DDL().CreateTable(e.ctx, ident, s.Cols, s.Constraints, s.Options)
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if terror.ErrorEqual(err, infoschema.TableExists) {
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if s.IfNotExists {
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return nil
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}
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return infoschema.TableExists.Gen("CREATE TABLE: table exists %s", ident)
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}
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return errors.Trace(err)
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}
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func (e *DDLExec) executeCreateIndex(s *ast.CreateIndexStmt) error {
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ident := ast.Ident{Schema: s.Table.Schema, Name: s.Table.Name}
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err := sessionctx.GetDomain(e.ctx).DDL().CreateIndex(e.ctx, ident, s.Unique, model.NewCIStr(s.IndexName), s.IndexColNames)
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return errors.Trace(err)
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}
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func (e *DDLExec) executeDropDatabase(s *ast.DropDatabaseStmt) error {
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err := sessionctx.GetDomain(e.ctx).DDL().DropSchema(e.ctx, model.NewCIStr(s.Name))
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if terror.ErrorEqual(err, infoschema.DatabaseNotExists) {
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if s.IfExists {
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err = nil
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} else {
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err = infoschema.DatabaseDropExists.Gen("Can't drop database '%s'; database doesn't exist", s.Name)
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}
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}
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return errors.Trace(err)
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}
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func (e *DDLExec) executeDropTable(s *ast.DropTableStmt) error {
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var notExistTables []string
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for _, tn := range s.Tables {
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fullti := ast.Ident{Schema: tn.Schema, Name: tn.Name}
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schema, ok := e.is.SchemaByName(tn.Schema)
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if !ok {
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// TODO: we should return special error for table not exist, checking "not exist" is not enough,
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// because some other errors may contain this error string too.
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notExistTables = append(notExistTables, fullti.String())
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continue
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}
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tb, err := e.is.TableByName(tn.Schema, tn.Name)
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if err != nil && strings.HasSuffix(err.Error(), "not exist") {
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notExistTables = append(notExistTables, fullti.String())
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continue
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} else if err != nil {
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return errors.Trace(err)
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}
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// Check Privilege
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privChecker := privilege.GetPrivilegeChecker(e.ctx)
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hasPriv, err := privChecker.Check(e.ctx, schema, tb.Meta(), mysql.DropPriv)
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if err != nil {
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return errors.Trace(err)
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}
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if !hasPriv {
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return errors.Errorf("You do not have the privilege to drop table %s.%s.", tn.Schema, tn.Name)
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}
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err = sessionctx.GetDomain(e.ctx).DDL().DropTable(e.ctx, fullti)
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if infoschema.DatabaseNotExists.Equal(err) || infoschema.TableNotExists.Equal(err) {
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notExistTables = append(notExistTables, fullti.String())
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} else if err != nil {
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return errors.Trace(err)
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}
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}
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if len(notExistTables) > 0 && !s.IfExists {
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return infoschema.TableDropExists.Gen("DROP TABLE: table %s does not exist", strings.Join(notExistTables, ","))
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}
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return nil
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}
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func (e *DDLExec) executeDropIndex(s *ast.DropIndexStmt) error {
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ti := ast.Ident{Schema: s.Table.Schema, Name: s.Table.Name}
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err := sessionctx.GetDomain(e.ctx).DDL().DropIndex(e.ctx, ti, model.NewCIStr(s.IndexName))
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if (infoschema.DatabaseNotExists.Equal(err) || infoschema.TableNotExists.Equal(err)) && s.IfExists {
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err = nil
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}
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return errors.Trace(err)
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}
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func (e *DDLExec) executeAlterTable(s *ast.AlterTableStmt) error {
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ti := ast.Ident{Schema: s.Table.Schema, Name: s.Table.Name}
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err := sessionctx.GetDomain(e.ctx).DDL().AlterTable(e.ctx, ti, s.Specs)
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return errors.Trace(err)
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}
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func joinColumnName(columnName *ast.ColumnName) string {
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var originStrs []string
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if columnName.Schema.O != "" {
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originStrs = append(originStrs, columnName.Schema.O)
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}
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if columnName.Table.O != "" {
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originStrs = append(originStrs, columnName.Table.O)
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}
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originStrs = append(originStrs, columnName.Name.O)
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return strings.Join(originStrs, ".")
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}
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