本节介绍如何使用函数计算对表格存储增量数据进行实时计算。
{
"Version": "string",
"Records": [
{
"Type": "string",
"Info": {
"Timestamp": int64
},
"PrimaryKey": [
{
"ColumnName": "string",
"Value": formated_value
}
],
"Columns": [
{
"Type": "string",
"ColumnName": "string",
"Value": formated_value,
"Timestamp": int64
}
]
}
]
}
{
"Version": "Sync-v1",
"Records": [
{
"Type": "PutRow",
"Info": {
"Timestamp": 1506416585740836
},
"PrimaryKey": [
{
"ColumnName": "pk_0",
"Value": 1506416585881590900
},
{
"ColumnName": "pk_1",
"Value": "2017-09-26 17:03:05.8815909 +0800 CST"
},
{
"ColumnName": "pk_2",
"Value": 1506416585741000
}
],
"Columns": [
{
"Type": "Put",
"ColumnName": "attr_0",
"Value": "hello_table_store",
"Timestamp": 1506416585741
},
{
"Type": "Put",
"ColumnName": "attr_1",
"Value": 1506416585881590900,
"Timestamp": 1506416585741
}
]
}
]
}
import logging
import cbor
import json
def get_attrbute_value(record, column):
attrs = record[u'Columns']
for x in attrs:
if x[u'ColumnName'] == column:
return x['Value']
def get_pk_value(record, column):
attrs = record[u'PrimaryKey']
for x in attrs:
if x['ColumnName'] == column:
return x['Value']
def handler(event, context):
logger = logging.getLogger()
logger.info("Begin to handle event")
#records = cbor.loads(event)
records = json.loads(event)
for record in records['Records']:
logger.info("Handle record: %s", record)
pk_0 = get_pk_value(record, "pk_0")
attr_0 = get_attrbute_value(record, "attr_0")
return 'OK'
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