github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/util/composite_clusterby_util.go (about)

     1  // Copyright 2021 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 util
    16  
    17  import (
    18  	"strconv"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/sql/plan/function/builtin/multi"
    21  
    22  	"github.com/fagongzi/util/format"
    23  	"github.com/matrixorigin/matrixone/pkg/catalog"
    24  	"github.com/matrixorigin/matrixone/pkg/container/batch"
    25  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    26  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    27  )
    28  
    29  func JudgeIsCompositeClusterByColumn(s string) bool {
    30  	if len(s) < len(catalog.PrefixCBColName) {
    31  		return false
    32  	}
    33  	return s[0:len(catalog.PrefixCBColName)] == catalog.PrefixCBColName
    34  }
    35  
    36  func BuildCompositeClusterByColumnName(s []string) string {
    37  	var name string
    38  	name = catalog.PrefixCBColName
    39  	for _, single := range s {
    40  		lenNum := format.Int64ToString(int64(len(single)))
    41  		for num := 0; num < 3-len(lenNum); num++ {
    42  			name += string('0')
    43  		}
    44  		name += lenNum
    45  		name += single
    46  	}
    47  	return name
    48  }
    49  
    50  func SplitCompositeClusterByColumnName(s string) []string {
    51  	var names []string
    52  	for next := len(catalog.PrefixCBColName); next < len(s); {
    53  		strLen, _ := strconv.Atoi(s[next : next+3])
    54  		names = append(names, s[next+3:next+3+strLen])
    55  		next += strLen + 3
    56  	}
    57  
    58  	return names
    59  }
    60  
    61  func GetClusterByColumnOrder(cbName, colName string) int {
    62  	if len(cbName) == 0 || len(colName) == 0 {
    63  		return -1
    64  	}
    65  	if cbName == colName {
    66  		return 0
    67  	}
    68  	if !JudgeIsCompositeClusterByColumn(cbName) {
    69  		return -1
    70  	}
    71  	idx := 0
    72  	for next := len(catalog.PrefixCBColName); next < len(cbName); {
    73  		strLen, _ := strconv.Atoi(cbName[next : next+3])
    74  		if cbName[next+3:next+3+strLen] == colName {
    75  			return idx
    76  		}
    77  		next += strLen + 3
    78  		idx++
    79  	}
    80  	return -1
    81  }
    82  
    83  func FillCompositeClusterByBatch(bat *batch.Batch, cbName string, proc *process.Process) {
    84  	names := SplitCompositeClusterByColumnName(cbName)
    85  	cCBVecMap := make(map[string]*vector.Vector)
    86  	for num, attrName := range bat.Attrs {
    87  		for _, name := range names {
    88  			if attrName == name {
    89  				cCBVecMap[name] = bat.Vecs[num]
    90  			}
    91  		}
    92  	}
    93  	vs := make([]*vector.Vector, 0)
    94  	for _, name := range names {
    95  		v := cCBVecMap[name]
    96  		vs = append(vs, v)
    97  	}
    98  	vec, _ := multi.Serial(vs, proc)
    99  	bat.Attrs = append(bat.Attrs, cbName)
   100  	bat.Vecs = append(bat.Vecs, vec)
   101  }