It offers limited querying capabilities, and it's slow because it needs to load and parse the entire JSON blob each time. The JSON data type is basically a blob that stores JSON data in raw format, preserving even insignificant things such as whitespace, the order of keys in objects, or even duplicate keys in objects. Our focus here is going to be on the JSONB data type because it allows the contents to be indexed and queried with ease. The key difference between them is that JSON stores data in a raw format and JSONB stores data in a custom binary format. PostgreSQL has two native data types to store JSON documents: JSON and JSONB. Moreover, querying deep into the JSON document required the use of gnarly regular expressions. On every query, the database had to load and parse the entire text blob. But processing and speed were a problem because the database had no internal knowledge of the structure of the document. But with the powerful JSON features built into PostgreSQL, the need for an external document store is no longer necessary.ĭocument stores are enticing because it enables you to "store data now, figure out schema later." You were always able to store arbitrary data structures as plain text in databases like PostgreSQL and MySQL. In the past, data analysts and engineers had to revert to a specialized document store like MongoDB for JSON processing. One of the unusual features of the PostgreSQL database is the ability to store and process JSON documents.
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