github.com/matrixorigin/matrixone@v1.2.0/pkg/frontend/back_self_handle.go (about)

     1  // Copyright 2024 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package frontend
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    19  	"github.com/matrixorigin/matrixone/pkg/sql/parsers/tree"
    20  )
    21  
    22  func execInFrontendInBack(backSes *backSession,
    23  	execCtx *ExecCtx) (err error) {
    24  	//check transaction states
    25  	switch st := execCtx.stmt.(type) {
    26  	case *tree.BeginTransaction:
    27  	case *tree.CommitTransaction:
    28  	case *tree.RollbackTransaction:
    29  	case *tree.Use:
    30  		err = handleChangeDB(backSes, execCtx, st.Name.Compare())
    31  		if err != nil {
    32  			return
    33  		}
    34  	case *tree.CreateDatabase:
    35  		err = inputNameIsInvalid(execCtx.reqCtx, string(st.Name))
    36  		if err != nil {
    37  			return
    38  		}
    39  		if st.SubscriptionOption != nil && backSes.tenant != nil && !backSes.tenant.IsAdminRole() {
    40  			err = moerr.NewInternalError(execCtx.reqCtx, "only admin can create subscription")
    41  			return
    42  		}
    43  		st.Sql = execCtx.sqlOfStmt
    44  	case *tree.DropDatabase:
    45  		err = inputNameIsInvalid(execCtx.reqCtx, string(st.Name))
    46  		if err != nil {
    47  			return
    48  		}
    49  		// if the droped database is the same as the one in use, database must be reseted to empty.
    50  		if string(st.Name) == backSes.GetDatabaseName() {
    51  			backSes.SetDatabaseName("")
    52  		}
    53  	case *tree.Grant:
    54  		switch st.Typ {
    55  		case tree.GrantTypeRole:
    56  			if err = handleGrantRole(backSes, execCtx, &st.GrantRole); err != nil {
    57  				return
    58  			}
    59  		case tree.GrantTypePrivilege:
    60  			if err = handleGrantPrivilege(backSes, execCtx, &st.GrantPrivilege); err != nil {
    61  				return
    62  			}
    63  		}
    64  	case *tree.Revoke:
    65  		switch st.Typ {
    66  		case tree.RevokeTypeRole:
    67  			if err = handleRevokeRole(backSes, execCtx, &st.RevokeRole); err != nil {
    68  				return
    69  			}
    70  		case tree.RevokeTypePrivilege:
    71  			if err = handleRevokePrivilege(backSes, execCtx, &st.RevokePrivilege); err != nil {
    72  				return
    73  			}
    74  		}
    75  	case *tree.EmptyStmt:
    76  		if err = handleEmptyStmt(backSes, execCtx, st); err != nil {
    77  			return
    78  		}
    79  	default:
    80  		return moerr.NewInternalError(execCtx.reqCtx, "backExec does not support %s", execCtx.sqlOfStmt)
    81  	}
    82  	return
    83  }