vlsi commented on a change in pull request #1795:
URL: https://github.com/apache/calcite/pull/1795#discussion_r492986042
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File path: core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
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@@ -1066,12 +1067,53 @@ private static RuntimeException notComparable(String
op, Object b0,
op, b1.getClass().toString()).ex();
}
- // &
- /** Helper function for implementing <code>BIT_AND</code> */
+ // BITAND
+
+ /** SQL <code>BITAND</code> operator applied to long values */
public static long bitAnd(long b0, long b1) {
return b0 & b1;
}
+ /** SQL <code>BITAND</code> operator applied to ByteString values */
+ public static ByteString bitAnd(ByteString b0, ByteString b1) {
+
+ if (b0.length() != b1.length()) {
+ throw RESOURCE.invalidInputForBitwiseBinaryValue().ex();
+ }
+ byte[] bytes0 = b0.getBytes();
+ byte[] bytes1 = b1.getBytes();
+ byte[] result = new byte[b0.length()];
+
+ IntStream.range(0, bytes0.length).forEach(i -> {
Review comment:
Frankly speaking, a good old `for` loop would look better here, and it
looks like streams add complexity without much benefits.
```suggestion
for (int i = 0; i < bytes0.length; i++) {
```
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