0
后,我得到了需要执行以下任务AWS胶水:Rename_field()relationalize
- Relationalize数据
- 重命名包含字段名”工作不工作的,这样。它可以作为普通的外观名称导入到PostgreSQL中。
下面是代码
import sys
from awsglue.transforms import *
from awsglue.utils import getResolvedOptions
from pyspark.context import SparkContext
from awsglue.context import GlueContext
from awsglue.job import Job
## @params: [JOB_NAME]
args = getResolvedOptions(sys.argv, ['JOB_NAME'])
sc = SparkContext()
glueContext = GlueContext(sc)
spark = glueContext.spark_session
job = Job(glueContext)
job.init(args['JOB_NAME'], args)
datasource0 = glueContext.create_dynamic_frame.from_catalog(database = "gluecatalog", table_name = "fcorders", transformation_ctx = "datasource0")
rootTableName = 'orders'
dfc = Relationalize.apply(frame = datasource0, staging_path = "s3://my-bucket/temp/", name = rootTableName, transformation_ctx = "dfc")
dfc.keys()
for df_name in dfc.keys():
m_df = dfc.select(df_name)
print "Writing to Postgre table: ", df_name
if (df_name <> rootTableName):
renamefields4 = m_df.rename_field("SalesDeliveryLines.val.shipped.unitDisplayCode", "shipped_unitDisplayCode")
else:
renamefields4 = RenameField.apply(frame = m_df, old_name = "vehicle.sourceReccordUID", new_name = "vehicle_sourceReccordUID", transformation_ctx = "renamefields4")
renamefields4.printSchema()
的printSchema()显示模式作为不变。如果我写入数据库,字段名称仍然包含“。”。
如果我使用ApplyMapping.apply()在关系化之前更改字段名称,它会使子表消失。如果在关系化之后使用ApplyMapping.apply(),它只会删除名称中包含'。'的所有字段。
底线是我不能在相同的工作中进行关联和重命名字段,无论我尝试什么。
我错过了什么,或者这是一个AWS胶水错误?
是否有一个链接来追踪这个bug? – rob