github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/colexec/table_function/table_function.go (about)

     1  // Copyright 2022 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 table_function
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  
    21  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    22  	"github.com/matrixorigin/matrixone/pkg/container/types"
    23  	"github.com/matrixorigin/matrixone/pkg/pb/plan"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    25  )
    26  
    27  func Call(idx int, proc *process.Process, arg any, isFirst bool, isLast bool) (bool, error) {
    28  	tblArg := arg.(*Argument)
    29  	switch tblArg.Name {
    30  	case "unnest":
    31  		return unnestCall(idx, proc, tblArg)
    32  	case "generate_series":
    33  		return generateSeriesCall(idx, proc, tblArg)
    34  	case "meta_scan":
    35  		return metaScanCall(idx, proc, tblArg)
    36  	case "current_account":
    37  		return currentAccountCall(idx, proc, tblArg)
    38  	default:
    39  		return true, moerr.NewNotSupported(proc.Ctx, fmt.Sprintf("table function %s is not supported", tblArg.Name))
    40  	}
    41  }
    42  
    43  func String(arg any, buf *bytes.Buffer) {
    44  	buf.WriteString(arg.(*Argument).Name)
    45  }
    46  
    47  func Prepare(proc *process.Process, arg any) error {
    48  	tblArg := arg.(*Argument)
    49  	switch tblArg.Name {
    50  	case "unnest":
    51  		return unnestPrepare(proc, tblArg)
    52  	case "generate_series":
    53  		return generateSeriesPrepare(proc, tblArg)
    54  	case "meta_scan":
    55  		return metaScanPrepare(proc, tblArg)
    56  	case "current_account":
    57  		return currentAccountPrepare(proc, tblArg)
    58  	default:
    59  		return moerr.NewNotSupported(proc.Ctx, fmt.Sprintf("table function %s is not supported", tblArg.Name))
    60  	}
    61  }
    62  
    63  func dupType(typ *plan.Type) types.Type {
    64  	return types.New(types.T(typ.Id), typ.Width, typ.Scale, typ.Precision)
    65  }