wehub-resource-sync
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// Copyright 2023 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ast
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import (
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"github.com/cockroachdb/errors"
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"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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pgnodes "github.com/dolthub/doltgresql/server/node"
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)
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// nodeCopyFrom handles *tree.CopyFrom nodes.
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func nodeCopyFrom(ctx *Context, node *tree.CopyFrom) (vitess.Statement, error) {
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if node == nil {
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return nil, nil
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}
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if node.Options.CopyFormat == tree.CopyFormatBinary {
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return nil, errors.Errorf("COPY FROM does not support format BINARY")
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}
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// We start by creating a stub insert statement for the COPY FROM statement, which we will use to build a basic
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// INSERT plan for. At runtime we will swap out the bogus row values for our actual data read from STDIN.
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var columns []vitess.ColIdent
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if len(node.Columns) > 0 {
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columns = make([]vitess.ColIdent, len(node.Columns))
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for i := range node.Columns {
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columns[i] = vitess.NewColIdent(string(node.Columns[i]))
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}
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}
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tableName, err := nodeTableName(ctx, &node.Table)
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if err != nil {
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return nil, err
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}
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stubValues := make(vitess.Values, 1)
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stubValues[0] = make(vitess.ValTuple, len(columns))
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for i := range columns {
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stubValues[0][i] = &vitess.NullVal{}
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}
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return vitess.InjectedStatement{
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Statement: pgnodes.NewCopyFrom(
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node.Table.Catalog(),
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doltdb.TableName{
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Name: node.Table.Object(),
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Schema: node.Table.Schema(),
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},
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node.Options,
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node.File,
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node.Stdin,
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node.Columns,
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&vitess.Insert{
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Action: vitess.InsertStr,
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Table: tableName,
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Columns: columns,
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Rows: &vitess.AliasedValues{
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Values: stubValues,
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},
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},
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),
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Children: nil,
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}, nil
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}
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