# JDBC Logstash - Json datatype is unknown

**URL:** <https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019>\
**Category:** Logstash\
**Created:** [July 5, 2019, 6:59am UTC](https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019 "2019-07-05T06:59:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![selimseker](https://avatars.discourse-cdn.com/v4/letter/s/f14d63/32.png) [@selimseker](https://discuss.elastic.co/u/selimseker)\
**Post date:** [July 5, 2019, 6:59am UTC](https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019/1 "2019-07-05T06:59:22Z")

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Hello everyone,  
I'm collecting the data from Postgresql table via Logstash. Postgre table contains text typed Json field. In the config file I filtered the json and I can see in the Kibana json keys separately but data types are seeing unknown. I tried the mutate and convert plugin but nothing has change. Can anybody help?  
Thanks in advance...

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [July 5, 2019, 2:50pm UTC](https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019/2 "2019-07-05T14:50:39Z")

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Have you done an index pattern refresh in Kibana?

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<div class="post-metadata">

**Author:** ![selimseker](https://avatars.discourse-cdn.com/v4/letter/s/f14d63/32.png) [@selimseker](https://discuss.elastic.co/u/selimseker)\
**Post date:** [July 5, 2019, 3:14pm UTC](https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019/3 "2019-07-05T15:14:06Z")

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Thanks, I just solve it, first reason is what you mentioned and the second is some naming issue in the json keys.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 2, 2019, 3:14pm UTC](https://discuss.elastic.co/t/jdbc-logstash-json-datatype-is-unknown/189019/4 "2019-08-02T15:14:13Z")

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