Hive JSON Data Types
I am looking to confirm my understanding of how complex JSON data types work in Hive. I am ingesting data onto a platform from a source system that stores data in MongoDB, so I am ingesting multiple JSON documents and storing in an object based storage. Finally, I am creating an external hive table using a JSON SerDe that is pointing to the directory which holds the JSON files.
Of course, not every JSON document within each collection has the same exact schema, however in order to create a data type in Hive I need to know the complete, possible, schema... correct?
It seems "obvious" to me that the answer is yes, as JSON is nested, you should have to fully describe the schema in order for Hive to be able to make sense of the data and for things like "lateral view explodes" to work. However, I am somewhat new to Hive so I just want to make sure there is not some feature of which I am unaware that somehow auto detects changes in your JSON schema and updates the data type appropriately.
json hive hive-serde
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
add a comment |
I am looking to confirm my understanding of how complex JSON data types work in Hive. I am ingesting data onto a platform from a source system that stores data in MongoDB, so I am ingesting multiple JSON documents and storing in an object based storage. Finally, I am creating an external hive table using a JSON SerDe that is pointing to the directory which holds the JSON files.
Of course, not every JSON document within each collection has the same exact schema, however in order to create a data type in Hive I need to know the complete, possible, schema... correct?
It seems "obvious" to me that the answer is yes, as JSON is nested, you should have to fully describe the schema in order for Hive to be able to make sense of the data and for things like "lateral view explodes" to work. However, I am somewhat new to Hive so I just want to make sure there is not some feature of which I am unaware that somehow auto detects changes in your JSON schema and updates the data type appropriately.
json hive hive-serde
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
add a comment |
I am looking to confirm my understanding of how complex JSON data types work in Hive. I am ingesting data onto a platform from a source system that stores data in MongoDB, so I am ingesting multiple JSON documents and storing in an object based storage. Finally, I am creating an external hive table using a JSON SerDe that is pointing to the directory which holds the JSON files.
Of course, not every JSON document within each collection has the same exact schema, however in order to create a data type in Hive I need to know the complete, possible, schema... correct?
It seems "obvious" to me that the answer is yes, as JSON is nested, you should have to fully describe the schema in order for Hive to be able to make sense of the data and for things like "lateral view explodes" to work. However, I am somewhat new to Hive so I just want to make sure there is not some feature of which I am unaware that somehow auto detects changes in your JSON schema and updates the data type appropriately.
json hive hive-serde
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
I am looking to confirm my understanding of how complex JSON data types work in Hive. I am ingesting data onto a platform from a source system that stores data in MongoDB, so I am ingesting multiple JSON documents and storing in an object based storage. Finally, I am creating an external hive table using a JSON SerDe that is pointing to the directory which holds the JSON files.
Of course, not every JSON document within each collection has the same exact schema, however in order to create a data type in Hive I need to know the complete, possible, schema... correct?
It seems "obvious" to me that the answer is yes, as JSON is nested, you should have to fully describe the schema in order for Hive to be able to make sense of the data and for things like "lateral view explodes" to work. However, I am somewhat new to Hive so I just want to make sure there is not some feature of which I am unaware that somehow auto detects changes in your JSON schema and updates the data type appropriately.
json hive hive-serde
json hive hive-serde
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
edited Nov 15 '18 at 17:54
dtolnay
3,64711634
3,64711634
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
asked Nov 15 '18 at 11:37
Nibroc A RehpotsirhcNibroc A Rehpotsirhc
1299
1299
add a comment |
add a comment |
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