Just to close the loop on this ... I just used Excel to invert the order of the polygons, as changing it in HANA was too intensive for me. The spatial reference guide has a section in the appendix called:
CREATE SPATIAL REFERENCE SYSTEM
That details a property called POLYGON FORMAT
Internally, SAP IQ interprets polygons by looking at the orientation of the constituent rings. As one travels a ring in the order of the defined points, the inside of the polygon is on the left side of the ring. The same rules are applied in PLANAR and ROUND EARTH spatial reference systems. The interpretation used by SAP IQ is a common but not universal interpretation. Some products use the exact opposite orientation, and some products do not rely on ring orientation to interpret polygons. The POLYGONFORMAT clause can be used to select a polygon interpretation that matches the input data, as needed. The following values are supported:
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It seems that the EvenOdd default setting in my case is resulting in a left-hand orientation. I suspect that changing the property to Clockwise might alter the orientation, but I'm not willing to tackle creating a new spatial reference system and reloading my data.