TCIS.Pluggable.Persistence.Oracle 1.0.0-rc.19

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher.
This is a prerelease version of TCIS.Pluggable.Persistence.Oracle. 
dotnet add package TCIS.Pluggable.Persistence.Oracle --version 1.0.0-rc.19
                    


                    

                
NuGet\Install-Package TCIS.Pluggable.Persistence.Oracle -Version 1.0.0-rc.19
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="TCIS.Pluggable.Persistence.Oracle" Version="1.0.0-rc.19" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="TCIS.Pluggable.Persistence.Oracle" Version="1.0.0-rc.19" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="TCIS.Pluggable.Persistence.Oracle" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add TCIS.Pluggable.Persistence.Oracle --version 1.0.0-rc.19
                    


                    

                
#r "nuget: TCIS.Pluggable.Persistence.Oracle, 1.0.0-rc.19"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package TCIS.Pluggable.Persistence.Oracle@1.0.0-rc.19
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=TCIS.Pluggable.Persistence.Oracle&version=1.0.0-rc.19&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=TCIS.Pluggable.Persistence.Oracle&version=1.0.0-rc.19&prerelease
                    


                            Install as a Cake Tool

TCIS.Pluggable.Persistence.Oracle

Oracle provider for the Pluggable multi-tenant data layer. Supports all three tiers — Virtual Private Database, schema per tenant, and database per tenant.

Shared behaviour — model composition, query filters, audit stamping — lives in TCIS.Pluggable.Persistence.EntityFrameworkCore.

1. Registration

dotnet add package TCIS.Pluggable.Persistence.Oracle

builder.Services.AddPluggableOracle<TosDbContext>(commandTimeoutSeconds: 30);

Do not pass a connection string. It is resolved per request from the Tenant Store through IMultiTenantContextAccessor<TenantInfo>.

2. Tier support

Tier Mechanism Identifier used
Tier 1 — Row level (VPD) DBMS_SESSION.SET_CONTEXT('TCIS_CTX', 'TENANT_ID', …) TenantInfo.Id (GUID)
Tier 2 — Schema per tenant ALTER SESSION SET CURRENT_SCHEMA TenantInfo.Identifier (site code)
Tier 3 — Database per tenant no-op initializer —

Tier 2 takes the schema name from TenantInfo.Identifier, not TenantInfo.Id. The identifier becomes an Oracle schema name and must pass the identifier whitelist; a GUID contains - and is always rejected.

In Oracle a schema is a user, so Tier 2 means one database user per tenant. Grant the application account the privileges to switch into each of them, and nothing more.

3. Tier 1 — application context and VPD

OracleRlsConnectionInitializer sets an application context on Open() and clears it on Close(). Your VPD policy function reads it back:

CREATE OR REPLACE FUNCTION sec.tenant_predicate(
    schema_name IN VARCHAR2, table_name IN VARCHAR2) RETURN VARCHAR2 AS
BEGIN
    RETURN 'TENANT_ID = SYS_CONTEXT(''TCIS_CTX'', ''TENANT_ID'')';
END;

The context namespace TCIS_CTX must be created with a trusted package so that only that package can set it — otherwise any session could set its own tenant id and defeat the policy:

CREATE CONTEXT TCIS_CTX USING sec.tenant_ctx_pkg;

A blank tenant id runs the cleanup command, clearing any context left over from a pooled session. The predicate then matches no row: fail-closed.

4. Tier status

Tier 3 is the simplest design here (a no-op initializer) but has no automated test coverage yet, and tenant resolution is its single point of failure — if the wrong connection string is resolved, nothing downstream will catch it. Ironically it is also the tier most likely to be chosen by a large port.

Treat a Tier 3 rollout as needing its own isolation test before go-live.

5. Pitfalls

# Pitfall Consequence
1 Using a GUID as the Tier 2 identifier Whitelist rejection — use the site code
2 Creating TCIS_CTX without a trusted package Any session can set its own tenant id and bypass VPD
3 Granting the application account EXEMPT ACCESS POLICY VPD no longer applies to it — the defence is gone
4 Assuming the EF query filter protects Dapper queries It does not; on Tier 1 only VPD stands in the way
5 Relying on commandTimeoutSeconds for Dapper It applies to EF Core only
6 Deploying Tier 3 without an isolation test Tenant resolution is the only thing preventing a cross-tenant connection

6. A note on terminology

FORCE ROW LEVEL SECURITY and BYPASSRLS are PostgreSQL concepts and have no Oracle equivalent. The Oracle counterparts are VPD policies plus the EXEMPT ACCESS POLICY privilege — do not port a PostgreSQL checklist verbatim.

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
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NuGet packages

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Version Downloads Last Updated
1.0.0-rc.19 10 8/13/2026
1.0.0-rc.18 6 8/13/2026
1.0.0-rc.17 18 8/13/2026
1.0.0-rc.16 32 8/13/2026
1.0.0-rc.15 38 8/12/2026
1.0.0-rc.14 46 8/12/2026
1.0.0-rc.13 40 8/11/2026
1.0.0-rc.12 47 8/10/2026
1.0.0-rc.11 61 7/28/2026
1.0.0-rc.10 54 7/24/2026
1.0.0-rc.9 51 7/21/2026
1.0.0-rc.8 51 7/21/2026