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query_util.go
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query_util.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package persistence
import (
"fmt"
"io"
"os"
"strings"
)
const (
queryDelimiter = ";"
querySliceDefaultSize = 100
)
// LoadAndSplitQuery loads and split cql / sql query into one statement per string
func LoadAndSplitQuery(
filePaths []string,
) ([]string, error) {
var files []io.Reader
for _, filePath := range filePaths {
f, err := os.Open(filePath)
if err != nil {
return nil, fmt.Errorf("error opening file %s: %w", filePath, err)
}
files = append(files, f)
}
return LoadAndSplitQueryFromReaders(files)
}
// LoadAndSplitQueryFromReaders loads and split cql / sql query into one statement per string
func LoadAndSplitQueryFromReaders(
readers []io.Reader,
) ([]string, error) {
result := make([]string, 0, querySliceDefaultSize)
for _, r := range readers {
content, err := io.ReadAll(r)
if err != nil {
return nil, fmt.Errorf("error reading contents: %w", err)
}
for _, stmt := range strings.Split(string(content), queryDelimiter) {
stmt = strings.TrimSpace(stmt)
if stmt == "" {
continue
}
result = append(result, stmt)
}
}
return result, nil
}