Question

我正在尝试使用AWS s3select功能查询镶木地板文件。根据{{3}}的支持，但我尝试了各种配置，但无法使其正常工作。在已显示为已注释掉的每个InputSerialization尝试中，我都列出了尝试该版本时收到的错误。有人可以告诉我如何正确配置吗？

import boto3

S3_BUCKET = 'myBucket'
KEY_LIST = "'0123','6789'"
S3_FILE = 'myFolder/myFile.parquet'

s3 = boto3.client('s3')

r = s3.select_object_content(
        Bucket=S3_BUCKET,
        Key=S3_FILE,
        ExpressionType='SQL',
        Expression="select \"Record\" from s3object s where s.\"Key\" in [" + KEY_LIST + "]",
#        InputSerialization={}, # (MissingRequiredParameter) when calling the SelectObjectContent operation: InputSerialization is required
#        InputSerialization={'CompressionType': { 'NONE' }},    # Invalid type for parameter InputSerialization.CompressionType, value: {'NONE'}, type: <class 'set'>, valid types: <class 'str'>
#        InputSerialization={'Parquet': {}}, # Unknown parameter in InputSerialization: "Parquet", must be one of: CSV, CompressionType, JSON
#        InputSerialization={'CompressionType': { 'Snappy' }},    # Invalid type for parameter InputSerialization.CompressionType, value: {'Snappy'}, type: <class 'set'>, valid types: <class 'str'>

        OutputSerialization={'JSON': {}},
)

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

Answer 1

我需要将boto3安装升级到最新版本。升级到1.9.7后，此版本可以正常工作：

InputSerialization={'Parquet': {}},

python boto3如何在镶木地板上配置AWS s3select？

1 个答案: