parquetFormat = "parquet"
)

// CompressionType - represents value inside <CompressionType/> in request XML.
type CompressionType string

const (
	noneType  CompressionType = "none"
	gzipType  CompressionType = "GZIP"
	bzip2Type CompressionType = "BZIP2"

	zstdType   CompressionType = "ZSTD"
	lz4Type    CompressionType = "LZ4"
	s2Type     CompressionType = "S2"
	snappyType CompressionType = "SNAPPY"
)

<SelectObjectContentRequest>
    <Expression>SELECT s.synonyms from s3object s WHERE 'whatever' IN s.synonyms</Expression>
    <ExpressionType>SQL</ExpressionType>
    <InputSerialization>
        <CompressionType>NONE</CompressionType>
        <JSON>
            <Type>DOCUMENT</Type>
        </JSON>
    </InputSerialization>
    <OutputSerialization>
        <CSV>
	   <QuoteCharacter>"</QuoteCharacter>
        </CSV>

<?xml version="1.0" encoding="UTF-8"?>
<SelectObjectContentRequest>
    <Expression>` + query + `</Expression>
    <ExpressionType>SQL</ExpressionType>
    <InputSerialization>
        <CompressionType>NONE</CompressionType>
        <CSV>
            <FileHeaderInfo>USE</FileHeaderInfo>
        </CSV>
    </InputSerialization>
    <OutputSerialization>
        <CSV>
        </CSV>
    </OutputSerialization>

	if pr == nil {
		return 0, 0
	}
	return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
}

func newProgressReader(rc io.ReadCloser, compType CompressionType) (*progressReader, error) {
	if rc == nil {
		return nil, errors.New("newProgressReader: nil reader provided")
	}
	scannedReader := newCountUpReader(rc)
	pr := progressReader{
		rc:            rc,

    ExpressionType='SQL',
    Expression="select * from s3object s where s.Location like '%United States%'",
    InputSerialization={
        'CSV': {
            "FileHeaderInfo": "USE",
        },
        'CompressionType': 'GZIP',
    },
    OutputSerialization={'CSV': {}},
)

for event in r['Payload']:
    if 'Records' in event:
        records = event['Records']['Payload'].decode('utf-8')
        print(records)