AWS Glue and update duplicating data
I'm using AWS Glue to move multiple files to an RDS instance from S3. Each day I get a new file into S3 which may contain new data, but can also contain a record I have already saved with some updates values. If I run the job multiple times I will of course get duplicate records in the database. Instead of multiple records being inserted I want Glue to try and update that record if it notices a field has changed, each record has a unique id. Is this possible?
python pyspark etl aws-glue
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
add a comment |
I'm using AWS Glue to move multiple files to an RDS instance from S3. Each day I get a new file into S3 which may contain new data, but can also contain a record I have already saved with some updates values. If I run the job multiple times I will of course get duplicate records in the database. Instead of multiple records being inserted I want Glue to try and update that record if it notices a field has changed, each record has a unique id. Is this possible?
python pyspark etl aws-glue
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
add a comment |
I'm using AWS Glue to move multiple files to an RDS instance from S3. Each day I get a new file into S3 which may contain new data, but can also contain a record I have already saved with some updates values. If I run the job multiple times I will of course get duplicate records in the database. Instead of multiple records being inserted I want Glue to try and update that record if it notices a field has changed, each record has a unique id. Is this possible?
python pyspark etl aws-glue
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
I'm using AWS Glue to move multiple files to an RDS instance from S3. Each day I get a new file into S3 which may contain new data, but can also contain a record I have already saved with some updates values. If I run the job multiple times I will of course get duplicate records in the database. Instead of multiple records being inserted I want Glue to try and update that record if it notices a field has changed, each record has a unique id. Is this possible?
python pyspark etl aws-glue
python pyspark etl aws-glue
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
edited Nov 22 '18 at 19:29
joshuahornby10
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
asked Nov 22 '18 at 19:21
joshuahornby10joshuahornby10
2,74642843
2,74642843
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Unfortunately there is no elegant way to do it with Glue. If you would write to Redshift you could use postactions to implement Redshift merge operation. However, it's not possible for other jdbc sinks (afaik).
Alternatively in your ETL script you can load existing data from a database to filter out existing records before saving. However if your DB table is big then the job may take a while to process it.
Another approach is to write into a staging table with mode 'overwrite' first (replace existing staging data) and then make a call to a DB via API to copy new records only into a final table.
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
add a comment |
I have used INSERT into table .... ON DUPLICATE KEY.. for UPSERTs into the Aurora RDS running mysql engine. Maybe this would be a reference for your use case. We cannot use a JDBC since we have only APPEND, OVERWRITE, ERROR modes currently supported.
I am not sure of the RDS database engine you are using, and following is an example for mysql UPSERTS.
Please see this reference, where i have posted a solution using INSERT INTO TABLE..ON DUPLICATE KEY for mysql :
Error while using INSERT INTO table ON DUPLICATE KEY, using a for loop array
answered Nov 25 '18 at 11:11
YuvaYuva
418417
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Unfortunately there is no elegant way to do it with Glue. If you would write to Redshift you could use postactions to implement Redshift merge operation. However, it's not possible for other jdbc sinks (afaik).
Alternatively in your ETL script you can load existing data from a database to filter out existing records before saving. However if your DB table is big then the job may take a while to process it.
Another approach is to write into a staging table with mode 'overwrite' first (replace existing staging data) and then make a call to a DB via API to copy new records only into a final table.
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
add a comment |
Unfortunately there is no elegant way to do it with Glue. If you would write to Redshift you could use postactions to implement Redshift merge operation. However, it's not possible for other jdbc sinks (afaik).
Alternatively in your ETL script you can load existing data from a database to filter out existing records before saving. However if your DB table is big then the job may take a while to process it.
Another approach is to write into a staging table with mode 'overwrite' first (replace existing staging data) and then make a call to a DB via API to copy new records only into a final table.
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
add a comment |
Unfortunately there is no elegant way to do it with Glue. If you would write to Redshift you could use postactions to implement Redshift merge operation. However, it's not possible for other jdbc sinks (afaik).
Alternatively in your ETL script you can load existing data from a database to filter out existing records before saving. However if your DB table is big then the job may take a while to process it.
Another approach is to write into a staging table with mode 'overwrite' first (replace existing staging data) and then make a call to a DB via API to copy new records only into a final table.
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
Unfortunately there is no elegant way to do it with Glue. If you would write to Redshift you could use postactions to implement Redshift merge operation. However, it's not possible for other jdbc sinks (afaik).
Alternatively in your ETL script you can load existing data from a database to filter out existing records before saving. However if your DB table is big then the job may take a while to process it.
Another approach is to write into a staging table with mode 'overwrite' first (replace existing staging data) and then make a call to a DB via API to copy new records only into a final table.
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
answered Nov 23 '18 at 2:29
Yuriy BondarukYuriy Bondaruk
1,167616
1,167616
add a comment |
add a comment |
I have used INSERT into table .... ON DUPLICATE KEY.. for UPSERTs into the Aurora RDS running mysql engine. Maybe this would be a reference for your use case. We cannot use a JDBC since we have only APPEND, OVERWRITE, ERROR modes currently supported.
I am not sure of the RDS database engine you are using, and following is an example for mysql UPSERTS.
Please see this reference, where i have posted a solution using INSERT INTO TABLE..ON DUPLICATE KEY for mysql :
Error while using INSERT INTO table ON DUPLICATE KEY, using a for loop array
answered Nov 25 '18 at 11:11
YuvaYuva
418417
add a comment |
I have used INSERT into table .... ON DUPLICATE KEY.. for UPSERTs into the Aurora RDS running mysql engine. Maybe this would be a reference for your use case. We cannot use a JDBC since we have only APPEND, OVERWRITE, ERROR modes currently supported.
I am not sure of the RDS database engine you are using, and following is an example for mysql UPSERTS.
Please see this reference, where i have posted a solution using INSERT INTO TABLE..ON DUPLICATE KEY for mysql :
Error while using INSERT INTO table ON DUPLICATE KEY, using a for loop array
answered Nov 25 '18 at 11:11
YuvaYuva
418417
add a comment |
I have used INSERT into table .... ON DUPLICATE KEY.. for UPSERTs into the Aurora RDS running mysql engine. Maybe this would be a reference for your use case. We cannot use a JDBC since we have only APPEND, OVERWRITE, ERROR modes currently supported.
I am not sure of the RDS database engine you are using, and following is an example for mysql UPSERTS.
Please see this reference, where i have posted a solution using INSERT INTO TABLE..ON DUPLICATE KEY for mysql :
Error while using INSERT INTO table ON DUPLICATE KEY, using a for loop array
answered Nov 25 '18 at 11:11
YuvaYuva
418417
I have used INSERT into table .... ON DUPLICATE KEY.. for UPSERTs into the Aurora RDS running mysql engine. Maybe this would be a reference for your use case. We cannot use a JDBC since we have only APPEND, OVERWRITE, ERROR modes currently supported.
I am not sure of the RDS database engine you are using, and following is an example for mysql UPSERTS.
Please see this reference, where i have posted a solution using INSERT INTO TABLE..ON DUPLICATE KEY for mysql :
Error while using INSERT INTO table ON DUPLICATE KEY, using a for loop array
answered Nov 25 '18 at 11:11
YuvaYuva
418417
answered Nov 25 '18 at 11:11
YuvaYuva
418417
answered Nov 25 '18 at 11:11
YuvaYuva
418417
answered Nov 25 '18 at 11:11
YuvaYuva
418417
418417
add a comment |
add a comment |
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