cloud-fan commented on a change in pull request #31198:
URL: https://github.com/apache/spark/pull/31198#discussion_r559383381
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/bitwiseExpressions.scala
##########
@@ -204,3 +205,47 @@ case class BitwiseCount(child: Expression)
case LongType => java.lang.Long.bitCount(input.asInstanceOf[Long])
}
}
+
+object BitwiseGetUtil {
+ def calculate(target: Long, pos: Int): Long = {
+ if (pos < 0) {
+ throw new IllegalArgumentException(s"Invalid bit position: $pos less
than zero")
+ } else if (java.lang.Long.SIZE <= pos) {
+ throw new IllegalArgumentException(s"Invalid bit position: $pos exceeds
the " +
+ "bit length of the target long")
+ }
+ (target >> pos) & 1
+ }
+}
+
+@ExpressionDescription(
+ usage = "_FUNC_(expr, pos) - Returns the value of the bit (0 or 1) at the
specified position.",
+ examples = """
+ Examples:
+ > SELECT _FUNC_(11, 0);
+ 1
+ > SELECT _FUNC_(11, 2);
+ 0
+ """,
+ since = "3.2.0",
+ group = "bitwise_funcs")
+case class BitwiseGet(left: Expression, right: Expression)
+ extends BinaryExpression with ImplicitCastInputTypes with NullIntolerant {
+
+ override def inputTypes: Seq[IntegralType] = Seq(LongType, IntegerType)
+
+ override def dataType: DataType = LongType
Review comment:
if it only returns 0 or 1, why we use long type? how about other
databases?
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