IvmAggBitmapUnionProcessor.java

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package org.apache.doris.mtmv.ivm.agg;

import org.apache.doris.nereids.trees.expressions.Slot;
import org.apache.doris.nereids.trees.expressions.functions.agg.AggregateFunction;
import org.apache.doris.nereids.trees.expressions.functions.agg.BitmapUnion;

/** Processor for BITMAP_UNION(expr). */
class IvmAggBitmapUnionProcessor extends IvmAggBitmapProcessor {
    @Override
    public boolean supportsOriginalFunction(AggregateFunction function) {
        return function instanceof BitmapUnion;
    }

    @Override
    public IvmAggFunctionKind handledFunctionKind() {
        return IvmAggFunctionKind.BITMAP_UNION;
    }

    @Override
    public void appendApplyExpressions(IvmAggTarget target, IvmAggApplyContext applyContext) {
        // The visible MV column is the bitmap state itself, so merge old visible state with insert-delta bitmap.
        Slot oldBitmap = applyContext.rawMvSlot(target.getVisibleSlot().getName());
        applyContext.putFinalExpression(target.getVisibleSlot().getName(),
                buildGuardedNewBitmap(target, applyContext, oldBitmap));
    }
}