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The JSON format includes the concept of array. A JSON object cant contain an attribute of array type. We have seen that we can use the MariaDB CONNECT Storage Engine provided UDFs (user defined functions) to implement dynamic columns.
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The MariaDB CONNECT storage engine offers access to JSON file and allows you to see a external JSON file as a MariaDB table.
A nice feature of the CONNECT storage Engine is its capability to auto discover a table structure when the table correspond to external data. In our case the CONNECT storage engine will automatically define the columns based on the JSON file hierarchical structure.
This is possible thanks to a feature of MariaDB Storage Engine API. This auto discovery feature allows a create statement to delegate the discovery of the table structure to the chosen storage engine.
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The MariaDB CONNECT Storage Engine allows to access heterogeneous data sources. In my previous post I show you how to use the MariaDB CONNECT Storage Engine to access an Oracle database. This is quite easy through the CONNECT Storage Engine ODBC table type.
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