Tenantification of database management systems

A non-transitory, computer-readable media comprising computer-readable instructions stored thereon that when executed by a processor of a control plane cause the processor to:

• receive a request from a tenant to update a portion of a database including tenant-specific metadata of multiple tenants and global metadata, wherein the tenant-specific metadata of the multiple tenants is identified in the database using individual tenant identifiers of the multiple tenants and can be accessed only by the corresponding tenant, and wherein the global metadata is identified in the database using a global tenant identifier and can be accessed by all of the multiple tenants;
• determine an individual tenant identifier of the tenant, wherein determining the individual tenant identifier comprises fetching the individual tenant identifier at runtime from a thread context that is global in scope and visible only in the thread handling the request, wherein the request does not include the individual tenant identifier;
• determine whether the portion of the database is associated with the global tenant identifier;
• and
• either allow the tenant to update the portion of the database in response to determining that the portion of the database is associated with the global tenant identifier, or restrict the tenant from updating the portion of the database in response to determining that the portion of the database is associated with neither the global tenant identifier nor the individual tenant identifier.

A method comprising:

• receiving, by a processor of a control plane, a request from a tenant to update a portion of a database including tenant-specific metadata of multiple tenants and global metadata, wherein the tenant-specific metadata of the multiple tenants is identified in the database using individual tenant identifiers of the multiple tenants and can be accessed only by the corresponding tenant, and wherein the global metadata is identified in the database using a global tenant identifier and can be accessed by all of the multiple tenants;
• determining, by the processor, an individual tenant identifier of the tenant, wherein determining the individual tenant identifier comprises fetching the individual tenant identifier at runtime from a thread context that is global in scope and visible only in the thread handling the request, wherein the request does not include the individual tenant identifier;
• determining, by the processor, whether the portion of the database is associated with the global tenant identifier;
• and
• either allowing, by the processor, the tenant to update the portion of the database in response to determining that the portion of the database is associated with the global tenant identifier, or restricting the tenant from updating the portion of the database in response to determining that the portion of the database is associated with neither the global tenant identifier nor the individual tenant identifier.