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Add debugging check #22603

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Add debugging check #22603

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4 changes: 4 additions & 0 deletions presto-main/src/main/java/com/facebook/presto/server/protocol/RowIterable.java
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Expand Up @@ -25,6 +25,7 @@
import java.util.Iterator;
import java.util.List;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

class RowIterable
Expand Down Expand Up @@ -69,6 +70,9 @@ protected List<Object> computeNext()
if (position >= page.getPositionCount()) {
return endOfData();
}
if (page.getChannelCount() > types.size()) {
throw new IllegalStateException("columns and types must be the same size");
};

List<Object> values = new ArrayList<>(page.getChannelCount());
for (int channel = 0; channel < page.getChannelCount(); channel++) {
Expand Down