Relational method for checking whether a path in a JSON exists #31136
Description
All relational databases support some way of checking whether a given JSON PATH exists in a JSON document. We should add a relational-level EF.Functions.JsonExists (or similar) which the different providers can translate to this.
| Database | Function |
|---|---|
| PG | jsonb_path_exists |
| SQL Server | JSON_PATH_EXISTS (since SQL Server 2022) |
| SQLite | json_type (returns NULL for non-existing path, as opposed to 'null' for JSON null values) |
| MariaDB | JSON_EXISTS |
| MySQL | JSON_CONTAINS_PATH |
| Oracle | JSON_EXISTS |