That depends on the deployment configuration you select. If you are deploying SAP HANA as the SAP NetWeaver BW native database, then no SAP NetWeaver BW Accelerator is needed in this configuration.
However, if you are deploying SAP HANA as an analytic accelerator and are replicating the data from SAP NetWeaver BW, then the SAP NetWeaver BW Accelerator is not replaced and should remain as part
of the existing SAP NetWeaver BW infrastructure.
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Tags: Does SAP HANA replace SAP NetWeaver BW Accelerator, HANA BWA, BI Accelerator