forked from apache/arrow-adbc
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat(go/adbc/driver/snowflake): support parameter binding (apache#1808)
Fixes apache#1144.
- Loading branch information
Showing
7 changed files
with
321 additions
and
11 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
|
|
||
| package snowflake | ||
|
|
||
| import ( | ||
| "database/sql" | ||
| "database/sql/driver" | ||
| "fmt" | ||
| "io" | ||
|
|
||
| "github.com/apache/arrow-adbc/go/adbc" | ||
| "github.com/apache/arrow/go/v17/arrow" | ||
| "github.com/apache/arrow/go/v17/arrow/array" | ||
| ) | ||
|
|
||
| func convertArrowToNamedValue(batch arrow.Record, index int) ([]driver.NamedValue, error) { | ||
| // see goTypeToSnowflake in gosnowflake | ||
| // technically, snowflake can bind an array of values at once, but | ||
| // only for INSERT, so we can't take advantage of that without | ||
| // analyzing the query ourselves | ||
| params := make([]driver.NamedValue, batch.NumCols()) | ||
| for i, field := range batch.Schema().Fields() { | ||
| rawColumn := batch.Column(i) | ||
| params[i].Ordinal = i + 1 | ||
| switch column := rawColumn.(type) { | ||
| case *array.Boolean: | ||
| params[i].Value = sql.NullBool{ | ||
| Bool: column.Value(index), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Float32: | ||
| // Snowflake only recognizes float64 | ||
| params[i].Value = sql.NullFloat64{ | ||
| Float64: float64(column.Value(index)), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Float64: | ||
| params[i].Value = sql.NullFloat64{ | ||
| Float64: column.Value(index), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Int8: | ||
| // Snowflake only recognizes int64 | ||
| params[i].Value = sql.NullInt64{ | ||
| Int64: int64(column.Value(index)), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Int16: | ||
| params[i].Value = sql.NullInt64{ | ||
| Int64: int64(column.Value(index)), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Int32: | ||
| params[i].Value = sql.NullInt64{ | ||
| Int64: int64(column.Value(index)), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.Int64: | ||
| params[i].Value = sql.NullInt64{ | ||
| Int64: column.Value(index), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.String: | ||
| params[i].Value = sql.NullString{ | ||
| String: column.Value(index), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| case *array.LargeString: | ||
| params[i].Value = sql.NullString{ | ||
| String: column.Value(index), | ||
| Valid: column.IsValid(index), | ||
| } | ||
| default: | ||
| return nil, adbc.Error{ | ||
| Code: adbc.StatusNotImplemented, | ||
| Msg: fmt.Sprintf("[Snowflake] Unsupported bind param '%s' type %s", field.Name, field.Type.String()), | ||
| } | ||
| } | ||
| } | ||
| return params, nil | ||
| } | ||
|
|
||
| type snowflakeBindReader struct { | ||
| doQuery func([]driver.NamedValue) (array.RecordReader, error) | ||
| currentBatch arrow.Record | ||
| nextIndex int64 | ||
| // may be nil if we bound only a batch | ||
| stream array.RecordReader | ||
| } | ||
|
|
||
| func (r *snowflakeBindReader) Release() { | ||
| if r.currentBatch != nil { | ||
| r.currentBatch.Release() | ||
| r.currentBatch = nil | ||
| } | ||
| if r.stream != nil { | ||
| r.stream.Release() | ||
| r.stream = nil | ||
| } | ||
| } | ||
|
|
||
| func (r *snowflakeBindReader) Next() (array.RecordReader, error) { | ||
| params, err := r.NextParams() | ||
| if err != nil { | ||
| // includes EOF | ||
| return nil, err | ||
| } | ||
| return r.doQuery(params) | ||
| } | ||
|
|
||
| func (r *snowflakeBindReader) NextParams() ([]driver.NamedValue, error) { | ||
| for r.currentBatch == nil || r.nextIndex >= r.currentBatch.NumRows() { | ||
| // We can be used both by binding a stream or by binding a | ||
| // batch. In the latter case, we have to release the batch, | ||
| // but not in the former case. Unify the cases by always | ||
| // releasing the batch, adding an "extra" retain so that the | ||
| // release does not cause issues. | ||
| if r.currentBatch != nil { | ||
| r.currentBatch.Release() | ||
| } | ||
| r.currentBatch = nil | ||
| if r.stream != nil && r.stream.Next() { | ||
| r.currentBatch = r.stream.Record() | ||
| r.currentBatch.Retain() | ||
| r.nextIndex = 0 | ||
| continue | ||
| } else if r.stream != nil && r.stream.Err() != nil { | ||
| return nil, r.stream.Err() | ||
| } else { | ||
| // no more params | ||
| return nil, io.EOF | ||
| } | ||
| } | ||
|
|
||
| params, err := convertArrowToNamedValue(r.currentBatch, int(r.nextIndex)) | ||
| r.nextIndex++ | ||
| return params, err | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
|
|
||
| package snowflake | ||
|
|
||
| import ( | ||
| "io" | ||
| "sync/atomic" | ||
|
|
||
| "github.com/apache/arrow-adbc/go/adbc" | ||
| "github.com/apache/arrow/go/v17/arrow" | ||
| "github.com/apache/arrow/go/v17/arrow/array" | ||
| ) | ||
|
|
||
| type readerIter interface { | ||
| Release() | ||
|
|
||
| Next() (array.RecordReader, error) | ||
| } | ||
|
|
||
| type concatReader struct { | ||
| refCount atomic.Int64 | ||
| readers readerIter | ||
| currentReader array.RecordReader | ||
| schema *arrow.Schema | ||
| err error | ||
| } | ||
|
|
||
| func (r *concatReader) nextReader() { | ||
| if r.currentReader != nil { | ||
| r.currentReader.Release() | ||
| r.currentReader = nil | ||
| } | ||
| reader, err := r.readers.Next() | ||
| if err == io.EOF { | ||
| r.currentReader = nil | ||
| } else if err != nil { | ||
| r.err = err | ||
| } else { | ||
| // May be nil | ||
| r.currentReader = reader | ||
| } | ||
| } | ||
| func (r *concatReader) Init(readers readerIter) error { | ||
| r.readers = readers | ||
| r.refCount.Store(1) | ||
| r.nextReader() | ||
| if r.err != nil { | ||
| r.Release() | ||
| return r.err | ||
| } else if r.currentReader == nil { | ||
| r.Release() | ||
| r.err = adbc.Error{ | ||
| Code: adbc.StatusInternal, | ||
| Msg: "[Snowflake] No data in this stream", | ||
| } | ||
| return r.err | ||
| } | ||
| r.schema = r.currentReader.Schema() | ||
| return nil | ||
| } | ||
| func (r *concatReader) Retain() { | ||
| r.refCount.Add(1) | ||
| } | ||
| func (r *concatReader) Release() { | ||
| if r.refCount.Add(-1) == 0 { | ||
| if r.currentReader != nil { | ||
| r.currentReader.Release() | ||
| } | ||
| r.readers.Release() | ||
| } | ||
| } | ||
| func (r *concatReader) Schema() *arrow.Schema { | ||
| if r.schema == nil { | ||
| panic("did not call concatReader.Init") | ||
| } | ||
| return r.schema | ||
| } | ||
| func (r *concatReader) Next() bool { | ||
| for r.currentReader != nil && !r.currentReader.Next() { | ||
| r.nextReader() | ||
| } | ||
| if r.currentReader == nil || r.err != nil { | ||
| return false | ||
| } | ||
| return true | ||
| } | ||
| func (r *concatReader) Record() arrow.Record { | ||
| return r.currentReader.Record() | ||
| } | ||
| func (r *concatReader) Err() error { | ||
| return r.err | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.