github.com/dolthub/go-mysql-server@v0.18.0/sql/rowexec/builder.go (about)

     1  // Copyright 2023 Dolthub, Inc.
     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 rowexec
    16  
    17  import (
    18  	"github.com/dolthub/go-mysql-server/sql"
    19  )
    20  
    21  var DefaultBuilder = &BaseBuilder{}
    22  
    23  var _ sql.NodeExecBuilder = (*BaseBuilder)(nil)
    24  
    25  type ExecBuilderFunc func(ctx *sql.Context, n sql.Node, r sql.Row) (sql.RowIter, error)
    26  
    27  // BaseBuilder converts a plan tree into a RowIter tree. All relational nodes
    28  // have a build statement. Custom source nodes that provide rows that implement
    29  // sql.ExecSourceRel are also built into the tree.
    30  type BaseBuilder struct{}
    31  
    32  func (b *BaseBuilder) Build(ctx *sql.Context, n sql.Node, r sql.Row) (sql.RowIter, error) {
    33  	return b.buildNodeExec(ctx, n, r)
    34  }