clintropolis commented on code in PR #16216:
URL: https://github.com/apache/druid/pull/16216#discussion_r1543826889
##########
sql/src/main/java/org/apache/druid/sql/calcite/expression/OperatorConversions.java:
##########
@@ -779,4 +781,13 @@ public static DirectOperatorConversion
druidUnaryDoubleFn(String sqlOperator, St
druidFunctionName
);
}
+
+ public static SqlReturnTypeInference
complexReturnTypeWithNullability(ColumnType columnType, boolean nullable)
Review Comment:
nit: there are some `SqlReturnTypeInference` defined in `Calcites`, maybe
this should also live there (or those should live here?)
##########
extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/theta/sql/ThetaSketchEstimateWithErrorBoundsOperatorConversion.java:
##########
@@ -46,7 +46,8 @@ public class
ThetaSketchEstimateWithErrorBoundsOperatorConversion implements Sql
private static final SqlFunction SQL_FUNCTION = OperatorConversions
.operatorBuilder(StringUtils.toUpperCase(FUNCTION_NAME))
.operandTypes(SqlTypeFamily.ANY, SqlTypeFamily.INTEGER)
- .returnTypeNonNull(SqlTypeName.OTHER)
+ .returnTypeInference(
+
OperatorConversions.complexReturnTypeWithNullability(SketchModule.BUILD_TYPE,
false))
Review Comment:
i guess the changes to `ComplexSqlType` make this not really matter anymore,
but technically `THETA_SKETCH` is the type string for what gets stored in
columns and is associated with the serde that is common between build/merge
(and the postagg the function maps to is actually using the merge type as its
output type)
also, nit formatting, trailing `)` should be on newline (though style stuff
doesn't always flag this consistently). same formatting nit for other similar
operator function changes
##########
extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/quantiles/sql/DoublesSketchObjectSqlAggregator.java:
##########
@@ -52,7 +52,8 @@ public class DoublesSketchObjectSqlAggregator implements
SqlAggregator
OperatorConversions.aggregatorBuilder(NAME)
.operandNames("column", "k")
.operandTypes(SqlTypeFamily.ANY,
SqlTypeFamily.EXACT_NUMERIC)
- .returnTypeNonNull(SqlTypeName.OTHER)
+ .returnTypeInference(
+
OperatorConversions.complexReturnTypeWithNullability(HllSketchModule.TYPE,
false))
Review Comment:
this should be `DoublesSketchModule.DOUBLES_SKETCH` i think?
##########
extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/hll/sql/HllSketchEstimateWithErrorBoundsOperatorConversion.java:
##########
@@ -47,7 +47,8 @@ public class
HllSketchEstimateWithErrorBoundsOperatorConversion implements SqlOp
.operatorBuilder(StringUtils.toUpperCase(FUNCTION_NAME))
.operandTypes(SqlTypeFamily.ANY, SqlTypeFamily.INTEGER)
.requiredOperandCount(1)
- .returnTypeNonNull(SqlTypeName.OTHER)
+ .returnTypeInference(
Review Comment:
this function returns `ARRAY<DOUBLE>` as far as I can tell. I think there is
a `.returnTypeNullableArrayWithNullableElements` that can be used instead of
`.returnTypeInference`
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