robinyqiu commented on a change in pull request #12292:
URL: https://github.com/apache/beam/pull/12292#discussion_r456572768
##########
File path:
sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/translation/ExpressionConverter.java
##########
@@ -786,15 +786,39 @@ private RexNode convertSimpleValueToRexNode(TypeKind
kind, Value value) {
ZetaSqlCalciteTranslationUtils.toSimpleRelDataType(kind,
rexBuilder()));
break;
case TYPE_DOUBLE:
+ // Cannot simply call makeApproxLiteral() for ZetaSQL DOUBLE type
because positive infinity,
+ // negative infinity and Nan cannot be directly converted to
BigDecimal. So we create three
+ // wrapper functions here for these three cases such that we can later
recognize it and
+ // customize its unparsing in BeamBigQuerySqlDialect.
double val = value.getDoubleValue();
- if (Double.isInfinite(val) || Double.isNaN(val)) {
- throw new UnsupportedOperationException("Does not support Infinite
or NaN literals.");
+ if (Double.isInfinite(val) && val > 0) {
+ ret =
+ rexBuilder()
+ .makeCall(
+ SqlOperators.createOtherKindSqlFunction(
+ BeamBigQuerySqlDialect.DOUBLE_POSITIVE_INF_FUNCTION,
+
ZetaSqlCalciteTranslationUtils.toCalciteTypeName(kind)));
+ } else if (Double.isInfinite(val) && val < 0) {
+ ret =
+ rexBuilder()
+ .makeCall(
+ SqlOperators.createOtherKindSqlFunction(
+ BeamBigQuerySqlDialect.DOUBLE_NEGATIVE_INF_FUNCTION,
+
ZetaSqlCalciteTranslationUtils.toCalciteTypeName(kind)));
+ } else if (Double.isNaN(val)) {
+ ret =
+ rexBuilder()
+ .makeCall(
+ SqlOperators.createOtherKindSqlFunction(
+ BeamBigQuerySqlDialect.DOUBLE_NAN_FUNCTION,
+
ZetaSqlCalciteTranslationUtils.toCalciteTypeName(kind)));
+ } else {
+ ret =
+ rexBuilder()
+ .makeApproxLiteral(
+ new BigDecimal(val),
+ ZetaSqlCalciteTranslationUtils.toSimpleRelDataType(kind,
rexBuilder()));
Review comment:
I meant
```
String wrapperFun = null;
if (val == Double.POSITIVE_INFINITY) {
wrapperFun = BeamBigQuerySqlDialect.DOUBLE_POSITIVE_INF_FUNCTION;
} else if (val == Double.NEGATIVE_INFINITY) {
wrapperFun = BeamBigQuerySqlDialect.DOUBLE_NEGATIVE_INF_FUNCTION;
} else if (Double.isNan(val)) {
wrapperFun = BeamBigQuerySqlDialect.DOUBLE_NAN_FUNCTION;
}
RelDataType returnType =
ZetaSqlCalciteTranslationUtils.toSimpleRelDataType(kind, rexBuilder());
if (wrapperFun == null) {
ret = rexBuilder().makeApproxLiteral(new BigDecimal(val), returnType);
} else {
ret =
rexBuilder().makeCall(SqlOperators.createOtherKindSqlFunction(wrapperFun,
returnType.getSqlTypeName()));
}
```
Isn't this simpler :)
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