xuzifu666 commented on code in PR #4180:
URL: https://github.com/apache/calcite/pull/4180#discussion_r1944608186
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core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
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@@ -369,6 +369,23 @@ public static String hex(String value) {
return Hex.encodeHexString(value.getBytes(UTF_8));
}
+ /** SQL BIN(long) function. */
+ public static String bin(long value) {
+ int zeros = Long.numberOfLeadingZeros(value);
+ if (zeros == Long.SIZE) {
+ return "0";
+ } else {
+ int length = Long.SIZE - zeros;
+ byte[] bytes = new byte[length];
+ for (int index = length - 1; index >= 0; index--) {
+ bytes[index] = (byte) ((value & 0x1) == 1 ? '1' : '0');
Review Comment:
Here stand for & with hex 1，if lowerest is 1 return 1，otherwise return 0.
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