tanclary commented on code in PR #3234:
URL: https://github.com/apache/calcite/pull/3234#discussion_r1254727378
##########
core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
##########
@@ -1524,136 +1524,89 @@ public static int multiply(int b0, int b1) {
throw notArithmetic("*", b0, b1);
}
- /** Helper method for safe arithmetic functions that checks if overflow has
occurred. */
- private static boolean isOverflow(BigDecimal ans, BigDecimal min, BigDecimal
max) {
- return ans.compareTo(min) > 0 || ans.compareTo(max) < 0;
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to integer values. */
- public static @Nullable Integer safeMultiply(int b0, int b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow = isOverflow(ans, BigDecimal.valueOf(Integer.MAX_VALUE),
BigDecimal.valueOf(Integer.MIN_VALUE));
- return overflow ? null : ans.intValue();
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to integer and double
values. */
- public static @Nullable Double safeMultiply(int b0, double b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Double.MAX_VALUE),
BigDecimal.valueOf(-Double.MAX_VALUE));
- return overflow ? null : ans.doubleValue();
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to integer and
BigDecimal values. */
- public static @Nullable BigDecimal safeMultiply(int b0, BigDecimal b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), b1);
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to integer and long
values. */
- public static @Nullable Long safeMultiply(int b0, long b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Long.MAX_VALUE),
BigDecimal.valueOf(Long.MIN_VALUE));
- return overflow ? null : ans.longValue();
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to double and integer
values. */
- public static @Nullable Double safeMultiply(double b0, int b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Double.MAX_VALUE),
BigDecimal.valueOf(-Double.MAX_VALUE));
- return overflow ? null : ans.doubleValue();
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to double values. */
- public static @Nullable Double safeMultiply(double b0, double b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Double.MAX_VALUE),
BigDecimal.valueOf(-Double.MAX_VALUE));
- return overflow ? null : ans.doubleValue();
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to double and BigDecimal
values. */
- public static @Nullable BigDecimal safeMultiply(double b0, BigDecimal b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), b1);
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
- }
-
- /** SQL <code>SAFE_MULTIPLY</code> function applied to double and long
values. */
- public static @Nullable Long safeMultiply(double b0, long b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Long.MAX_VALUE),
BigDecimal.valueOf(Long.MIN_VALUE));
- return overflow ? null : ans.longValue();
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to long values. */
+ public static @Nullable Long safeMultiply(long b0, long b1) {
+ try {
+ return Math.multiplyExact(b0, b1);
+ } catch (ArithmeticException e) {
+ return null;
+ }
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal and
integer values. */
- public static @Nullable BigDecimal safeMultiply(BigDecimal b0, int b1) {
- BigDecimal ans = multiply(b0, BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to long and BigDecimal
values. */
+ public static @Nullable BigDecimal safeMultiply(long b0, BigDecimal b1) {
+ BigDecimal ans = BigDecimal.valueOf(b0).multiply(b1);
+ return decimalOverflow(ans) ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal and double
values. */
- public static @Nullable BigDecimal safeMultiply(BigDecimal b0, double b1) {
- BigDecimal ans = multiply(b0, BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal and long
values. */
+ public static @Nullable BigDecimal safeMultiply(BigDecimal b0, long b1) {
+ BigDecimal ans = b0.multiply(BigDecimal.valueOf(b1));
+ return decimalOverflow(ans) ? ans : null;
}
/** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal values. */
public static @Nullable BigDecimal safeMultiply(BigDecimal b0, BigDecimal
b1) {
- BigDecimal ans = multiply(b0, b1);
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
+ BigDecimal ans = b0.multiply(b1);
+ return decimalOverflow(ans) ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal and long
values. */
- public static @Nullable BigDecimal safeMultiply(BigDecimal b0, long b1) {
- BigDecimal ans = multiply(b0, BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to double and long
values. */
+ public static @Nullable Double safeMultiply(double b0, long b1) {
+ double ans = b0 * b1;
+ boolean isInfinite = Double.isInfinite(b0);
+ return doubleOverflow(ans) || isInfinite ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to long and integer
values. */
- public static @Nullable Long safeMultiply(long b0, int b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Long.MAX_VALUE),
BigDecimal.valueOf(Long.MIN_VALUE));
- return overflow ? null : ans.longValue();
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to long and double
values. */
+ public static @Nullable Double safeMultiply(long b0, double b1) {
+ double ans = b0 * b1;
+ boolean isInfinite = Double.isInfinite(b1);
+ return doubleOverflow(ans) || isInfinite ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to long and double
values. */
- public static @Nullable Long safeMultiply(long b0, double b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Long.MAX_VALUE),
BigDecimal.valueOf(Long.MIN_VALUE));
- return overflow ? null : ans.longValue();
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to double and BigDecimal
values. */
+ public static @Nullable Double safeMultiply(double b0, BigDecimal b1) {
+ double ans = b0 * b1.doubleValue();
+ boolean isInfinite = Double.isInfinite(b0);
+ return doubleOverflow(ans) || isInfinite ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to long values. */
- public static @Nullable Long safeMultiply(long b0, long b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), BigDecimal.valueOf(b1));
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Long.MAX_VALUE),
BigDecimal.valueOf(Long.MIN_VALUE));
- return overflow ? null : ans.longValue();
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to BigDecimal and double
values. */
+ public static @Nullable Double safeMultiply(BigDecimal b0, double b1) {
+ double ans = b0.doubleValue() * b1;
+ boolean isInfinite = Double.isInfinite(b1);
+ return doubleOverflow(ans) || isInfinite ? ans : null;
}
- /** SQL <code>SAFE_MULTIPLY</code> function applied to long and BigDecimal
values. */
- public static @Nullable BigDecimal safeMultiply(long b0, BigDecimal b1) {
- BigDecimal ans = multiply(BigDecimal.valueOf(b0), b1);
- boolean overflow =
- isOverflow(ans, BigDecimal.valueOf(Float.MAX_VALUE),
BigDecimal.valueOf(-Float.MAX_VALUE));
- return overflow ? null : ans;
+ /** SQL <code>SAFE_MULTIPLY</code> function applied to double values. */
+ public static @Nullable Double safeMultiply(double b0, double b1) {
+ double ans = b0 * b1;
+ boolean isInfinite = Double.isInfinite(b0) || Double.isInfinite(b1);
+ return doubleOverflow(ans) || isInfinite ? ans : null;
+ }
+
+ /** Helper for the safe arithmetic functions to determine
+ * overflow for a BigDecimal value. According to BigQuery, BigDecimal
+ * overflow occurs if the precision is greater than 76 or the precision
+ * is greater than 38. */
Review Comment:
Oops, good catch. Fixed now.
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