tanclary commented on code in PR #3234:
URL: https://github.com/apache/calcite/pull/3234#discussion_r1212344188
##########
core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
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@@ -1524,6 +1524,19 @@ 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 b0) {
+ return b0.compareTo(BigDecimal.valueOf(Long.MIN_VALUE)) < 0
+ || b0.compareTo(BigDecimal.valueOf(Long.MAX_VALUE)) > 0;
+ }
+
+ /** SQL {@code SAFE_MULTIPLY(<value0>, <value1>)} function. */
+ public static @Nullable Double safeMultiply(@PolyNull BigDecimal b0,
Review Comment:
@zoudan I think I am going to mirror my commit from [LOG
function](https://github.com/apache/calcite/commit/74bc025fbb5af4f43762926e0bec75acf6ac3025).
This function has the same operand type // return type relationship so should
be okay. [BigQuery
docs](https://cloud.google.com/bigquery/docs/reference/standard-sql/mathematical_functions#log)
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