What will happen to old data if data structure changes in hyperledger fabric chaincode












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What will happen to old data if data structure changes in hyperledger fabric chaincode? will it affect when we read old data from couchdb and translate it into object of new structure? Lets say I've added a new field and removed old field in the structure. what will be the impact of this change to old data?










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    What will happen to old data if data structure changes in hyperledger fabric chaincode? will it affect when we read old data from couchdb and translate it into object of new structure? Lets say I've added a new field and removed old field in the structure. what will be the impact of this change to old data?










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      What will happen to old data if data structure changes in hyperledger fabric chaincode? will it affect when we read old data from couchdb and translate it into object of new structure? Lets say I've added a new field and removed old field in the structure. what will be the impact of this change to old data?










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      What will happen to old data if data structure changes in hyperledger fabric chaincode? will it affect when we read old data from couchdb and translate it into object of new structure? Lets say I've added a new field and removed old field in the structure. what will be the impact of this change to old data?







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      asked Nov 13 '18 at 5:04









      jkstarjkstar

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          CouchDb is a Nosql DB. You don't specify a schema to the records which would be created. The records are in the form of a Document. You can just relate a record in CouchDB as a JSON.



          Would JSON ever get affected by adding/deleting a key?



          No, it doesn't. It's just that the old records won't have that key which is being added to the new records. Therefore, you might not be able to retrieve old records only if you are filtering/querying the records with newly added key.



          Hope this helps.






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            CouchDb is a Nosql DB. You don't specify a schema to the records which would be created. The records are in the form of a Document. You can just relate a record in CouchDB as a JSON.



            Would JSON ever get affected by adding/deleting a key?



            No, it doesn't. It's just that the old records won't have that key which is being added to the new records. Therefore, you might not be able to retrieve old records only if you are filtering/querying the records with newly added key.



            Hope this helps.






            share|improve this answer






























              0














              CouchDb is a Nosql DB. You don't specify a schema to the records which would be created. The records are in the form of a Document. You can just relate a record in CouchDB as a JSON.



              Would JSON ever get affected by adding/deleting a key?



              No, it doesn't. It's just that the old records won't have that key which is being added to the new records. Therefore, you might not be able to retrieve old records only if you are filtering/querying the records with newly added key.



              Hope this helps.






              share|improve this answer




























                0












                0








                0







                CouchDb is a Nosql DB. You don't specify a schema to the records which would be created. The records are in the form of a Document. You can just relate a record in CouchDB as a JSON.



                Would JSON ever get affected by adding/deleting a key?



                No, it doesn't. It's just that the old records won't have that key which is being added to the new records. Therefore, you might not be able to retrieve old records only if you are filtering/querying the records with newly added key.



                Hope this helps.






                share|improve this answer















                CouchDb is a Nosql DB. You don't specify a schema to the records which would be created. The records are in the form of a Document. You can just relate a record in CouchDB as a JSON.



                Would JSON ever get affected by adding/deleting a key?



                No, it doesn't. It's just that the old records won't have that key which is being added to the new records. Therefore, you might not be able to retrieve old records only if you are filtering/querying the records with newly added key.



                Hope this helps.







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                edited Nov 23 '18 at 2:47









                cricket_007

                81k1142110




                81k1142110










                answered Nov 22 '18 at 3:32









                Nitish BhardwajNitish Bhardwaj

                394213




                394213






























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