[mapserver-users] How to avoid reading unneeded Features from PostGIS when displaying by map scale ranges?

[Kyle Qian]

Hi, I know that MapServer will determine the CLASS of a Feature based on
the expression and scale range when drawing, but what if I want to avoid
reading data that is not needed under the current scale? FILTER can filter
LAYER data at the same time as spatial query, but do I have to create a
separate LAYER for each scale range?
Thanks.
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