PostgreSQL to SAP HANA
real-time replication
TwinCommit replicates PostgreSQL to SAP HANA in real time by reading the PostgreSQL transaction log and applying every committed change exactly once and in commit order. Use it to migrate or continuously mirror PostgreSQL into SAP HANA with zero downtime, with no triggers or capture tables on the source.
PostgreSQL
log reader
commit-ordered · exactly-once
SAP HANA
native writer
How capture works on PostgreSQL
TwinCommit uses a logical replication slot with the built-in pgoutput plugin, so there is nothing to install on the server.
Prerequisites
- ✓wal_level = logical
- ✓REPLICATION privilege
- ✓Primary key or REPLICA IDENTITY FULL
How apply works on SAP HANA
Array UPSERT and DELETE statements committed in the same transaction as the TwinCommit checkpoint.
Requirements
- ✓log_mode = normal
- ✓Technical user with LOG ADMIN and CATALOG READ
- ✓Primary keys on replicated tables
Setup
Set up PostgreSQL → SAP HANA in four steps
- 1
Prepare PostgreSQL
Run twincommit check. It verifies wal_level = logical and the other prerequisites, and prints the exact fix for anything missing.
- 2
Point at SAP HANA
Add a target block for SAP HANA. TwinCommit can generate target DDL with twincommit ddl -apply.
- 3
Snapshot
twincommit snapshot copies each table under a brief share lock and records the exact log position.
- 4
Stream
twincommit run streams every committed change from that position, exactly once and in commit order.
source:
type: postgres
dsn: ${SOURCE_DSN}
slot: twincommit
target:
type: saphana
host: hana.internal:30015
user: ${HANA_USER}
password: ${HANA_PASSWORD}
schema: REPLICA
tables:
- source: SALES.ORDERS
- source: SALES.ORDER_LINES
exclude_columns: [INTERNAL_NOTES]PostgreSQL to SAP HANA replication FAQ
How does TwinCommit replicate PostgreSQL to SAP HANA?
+
TwinCommit reads changes from the PostgreSQL transaction log, buffers them per transaction, and applies each committed transaction to SAP HANA in commit order. Array UPSERT and DELETE statements committed in the same transaction as the TwinCommit checkpoint.
Does PostgreSQL to SAP HANA replication need triggers or capture tables?
+
No. TwinCommit reads the PostgreSQL log directly and creates no objects in the source database.
Is PostgreSQL to SAP HANA replication exactly-once?
+
Yes. TwinCommit commits its checkpoint in the same SAP HANA transaction as the data, so a crash or restart never loses or duplicates a transaction.
What PostgreSQL versions are supported?
+
PostgreSQL 13–18 · Amazon RDS and Aurora · Azure Flexible Server · Cloud SQL · AlloyDB.
Stream PostgreSQL to SAP HANA today.
Download the free Developer edition, or have one of our replication engineers walk you through a migration plan.