In an extract report, I noticed that the CREATE and DROP of a global temporary table were excluded (OGG-10473), while the TRUNCATE of the same table was included (OGG-00487). If the extract writes the TRUNCATE to the trail but not the CREATE, the replicat will try to apply it on a target where the table does not exist. The replicat…
In a previous blog, I noted that there might be a bug with the Maximum Input Characters setting in GoldenGate 26ai AI Service. The bug was confirmed by Oracle, so let’s see what it is exactly. Bug found in GoldenGate 26ai AI Service Maximum Input Characters is a setting in the AI Service. You can set it when registering a…
When automating your GoldenGate deployments, or tearing down a test environment, handling trail files is important. In fact, deleting an extract or a replicat does not delete the trail files it was writing to or reading from. It leaves the trail resource itself behind too, causing confusion (or worse) later. Indeed, a fresh extract writing to the same trail name/path…
For more than ten years (GoldenGate 12.2, released in 2015), GoldenGate has provided a way of performing initial load of tables with a per-table instantiation CSN. But when migrating a database or just performing the initial load of a single table to prepare a GoldenGate replication, the known procedure is very often still the old one: start an extract, note…
I sometimes get asked how the new AI Service of GoldenGate 26ai works, and the best way to show it is to see it in action. In this blog, I will set up the AI Service with Google Gemini, using a free API key in Google AI Studio. Most of what will be said here can be applied to the…
When replicating data with GoldenGate, you often want DDL changes (table alterations, new tables, dropped indexes, etc.) to follow alongside DML. But replicating all DDL is sometimes dangerous (TRUNCATE, DROP TABLE) or simply impossible (architecture differences between source and target). DDL filtering gives you precise control over this. This blog covers multiple aspects, including latest changes introduced in GoldenGate 26ai:…
When migrating a Coordinated Replicat for a client, I faced a very specific OGG-02454 error that I wanted to share. When using the migration utility on a Classic Architecture Coordinated Replicat, every attempt failed at the checkpoint conversion step with OGG-02454 Trail … not found in checkpoint file. Because the migration utility rolls back the entire migration on any hard…
Upgrading GoldenGate when the source is DB2 for z/OS is not quite the same exercise as upgrading a GoldenGate installation for Oracle. Most of what I described in my generic blogs about planning a GoldenGate upgrade and migrating from Classic to Microservices Architecture is still valid. However, there is an extra layer to deal with. It has to do with…
In a previous blog, I presented how to set up a distribution path between two GoldenGate deployments both secured with NGINX. The method I used there was purely through the Web UI. But GoldenGate also exposes a full REST API, and everything you can do in the UI can be done through the API as well, which is useful for…
While upgrading GoldenGate to 26ai for a DB2 z/OS source, I had to update the IBM Data Server Driver for ODBC and CLI (CLI Driver, in short) alongside it. Since I realized that DB2 driver know-how was rare in companies, I figured it would be worth writing a blog about the topic. In this GoldenGate upgrade, the previous driver was…
While working on a client’s GoldenGate 26ai environment, I ran into a NFS-related replication issue that could have been serious, had it happened in production. Here is what happened and how the issue was fixed. The client’s GoldenGate extract was running on a dedicated server, capturing changes from an Oracle 19c source database. Trail files were written on an NFS.…
The 23.26.3.0.0 release update of GoldenGate 26ai (July 2026) ships a small but welcome usability change, listed in the New Enhancements section of the release notes: Bug 39415027: Generic – Simplified Distribution and Receiver Service Path Configuration Enhanced the Create Distribution and Receiver Service Paths experience by introducing Simple and Advanced configuration modes. The simplified view displays only the required settings by default, while…
