github.com/matrixorigin/matrixone@v1.2.0/pkg/util/executor/mem_executor.go (about)

     1  // Copyright 2023 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 executor
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/common/mpool"
    21  	"github.com/matrixorigin/matrixone/pkg/container/batch"
    22  	"github.com/matrixorigin/matrixone/pkg/container/types"
    23  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    24  	"github.com/matrixorigin/matrixone/pkg/txn/client"
    25  )
    26  
    27  type memExecutor struct {
    28  	mocker func(sql string) (Result, error)
    29  }
    30  
    31  // NewMemExecutor used to testing
    32  func NewMemExecutor(mocker func(sql string) (Result, error)) SQLExecutor {
    33  	return &memExecutor{mocker: mocker}
    34  }
    35  
    36  func (e *memExecutor) NewTxnOperator(_ context.Context) client.TxnOperator {
    37  	return nil
    38  }
    39  
    40  func (e *memExecutor) Exec(
    41  	ctx context.Context,
    42  	sql string,
    43  	opts Options) (Result, error) {
    44  	return e.mocker(sql)
    45  }
    46  
    47  func (e *memExecutor) ExecTxn(
    48  	ctx context.Context,
    49  	execFunc func(TxnExecutor) error,
    50  	opts Options) error {
    51  	te := &memTxnExecutor{mocker: e.mocker}
    52  	return execFunc(te)
    53  }
    54  
    55  type memTxnExecutor struct {
    56  	mocker func(sql string) (Result, error)
    57  }
    58  
    59  func (te *memTxnExecutor) Exec(sql string, _ StatementOption) (Result, error) {
    60  	return te.mocker(sql)
    61  }
    62  
    63  func (te *memTxnExecutor) Use(db string) {
    64  
    65  }
    66  
    67  func (te *memTxnExecutor) LockTable(table string) error {
    68  	return nil
    69  }
    70  
    71  func (te *memTxnExecutor) Txn() client.TxnOperator {
    72  	return nil
    73  }
    74  
    75  // MemResult used to test. Construct a Result from memory.
    76  type MemResult struct {
    77  	cols  int
    78  	types []types.Type
    79  	res   Result
    80  }
    81  
    82  func NewMemResult(
    83  	types []types.Type,
    84  	mp *mpool.MPool) *MemResult {
    85  	return &MemResult{res: Result{mp: mp}, types: types, cols: len(types)}
    86  }
    87  
    88  func (m *MemResult) NewBatch() {
    89  	m.res.Batches = append(m.res.Batches, newBatch(m.cols))
    90  }
    91  
    92  func (m *MemResult) GetResult() Result {
    93  	return m.res
    94  }
    95  
    96  func AppendStringRows(m *MemResult, col int, values []string) error {
    97  	bat := m.res.Batches[len(m.res.Batches)-1]
    98  	return appendStringCols(bat, col, m.types[col], values, m.res.mp)
    99  }
   100  
   101  func AppendBytesRows(m *MemResult, col int, values [][]byte) error {
   102  	bat := m.res.Batches[len(m.res.Batches)-1]
   103  	return appendBytesCols(bat, col, m.types[col], values, m.res.mp)
   104  }
   105  
   106  func AppendFixedRows[T any](m *MemResult, col int, values []T) error {
   107  	bat := m.res.Batches[len(m.res.Batches)-1]
   108  	return appendCols(bat, col, m.types[col], values, m.res.mp)
   109  }
   110  
   111  func newBatch(cols int) *batch.Batch {
   112  	bat := batch.NewWithSize(cols)
   113  	bat.SetRowCount(cols)
   114  	return bat
   115  }
   116  
   117  func appendCols[T any](
   118  	bat *batch.Batch,
   119  	colIndex int,
   120  	tp types.Type,
   121  	values []T,
   122  	mp *mpool.MPool) error {
   123  
   124  	col := vector.NewVec(tp)
   125  	if err := vector.AppendFixedList(col, values, nil, mp); err != nil {
   126  		return err
   127  	}
   128  	bat.Vecs[colIndex] = col
   129  	return nil
   130  }
   131  
   132  func appendBytesCols(
   133  	bat *batch.Batch,
   134  	colIndex int,
   135  	tp types.Type,
   136  	values [][]byte,
   137  	mp *mpool.MPool) error {
   138  
   139  	col := vector.NewVec(tp)
   140  	for _, v := range values {
   141  		if err := vector.AppendBytes(col, v[:], false, mp); err != nil {
   142  			return err
   143  		}
   144  	}
   145  	bat.Vecs[colIndex] = col
   146  	return nil
   147  }
   148  
   149  func appendStringCols(
   150  	bat *batch.Batch,
   151  	colIndex int,
   152  	tp types.Type,
   153  	values []string,
   154  	mp *mpool.MPool) error {
   155  
   156  	col := vector.NewVec(tp)
   157  	for _, v := range values {
   158  		if err := vector.AppendBytes(col, []byte(v), false, mp); err != nil {
   159  			return err
   160  		}
   161  	}
   162  	bat.Vecs[colIndex] = col
   163  	return nil
   164  }