Key value pair in PostgreSQL [closed]

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Closed 6 years ago.

I need to save key value pairs in PostgreSQL database which will have some basic info regarding the record.

After some googling on the topic I found out hstore is one of the options. But even after going through the documentation I am not able to figure out how to add records in a table with a hstore column and also how they are returned in the result and how I can parse it.

I am totally new to PostgreSQL so any code reference will be great.

回答1:

You need to install the additional module hstore before you can use it. Once per database:

CREATE EXTENSION hstore;

CREATE EXTENSION has been introduced with Postgres 9.1. Older versions have other methods.

Read more about the pros and (many) cons of EAV (Entity-Attribute-Value) storage in an RDBMS under this related question od dba.SE.

来源：https://stackoverflow.com/questions/15032540/key-value-pair-in-postgresql