本文整理汇总了Java中org.apache.calcite.sql.fun.SqlStdOperatorTable.SUM0属性的典型用法代码示例。如果您正苦于以下问题：Java SqlStdOperatorTable.SUM0属性的具体用法？Java SqlStdOperatorTable.SUM0怎么用？Java SqlStdOperatorTable.SUM0使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类org.apache.calcite.sql.fun.SqlStdOperatorTable的用法示例。
在下文中一共展示了SqlStdOperatorTable.SUM0属性的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: rewriteAggregateCall
@SuppressWarnings("deprecation")
private AggregateCall rewriteAggregateCall(AggregateCall aggCall, FunctionDesc func) {
// rebuild function
String callName = getSqlFuncName(aggCall);
RelDataType fieldType = aggCall.getType();
SqlAggFunction newAgg = aggCall.getAggregation();
Map<String, Class<?>> udafMap = func.getMeasureType().getRewriteCalciteAggrFunctions();
if (func.isCount()) {
newAgg = SqlStdOperatorTable.SUM0;
} else if (udafMap != null && udafMap.containsKey(callName)) {
newAgg = createCustomAggFunction(callName, fieldType, udafMap.get(callName));
}
// rebuild parameters
List<Integer> newArgList = Lists.newArrayList(aggCall.getArgList());
if (udafMap != null && udafMap.containsKey(callName)) {
newArgList = truncArgList(newArgList, udafMap.get(callName));
}
if (func.needRewriteField()) {
RelDataTypeField field = getInput().getRowType().getField(func.getRewriteFieldName(), true, false);
if (newArgList.isEmpty()) {
newArgList.add(field.getIndex());
} else {
// TODO: only the first column got overwritten
newArgList.set(0, field.getIndex());
}
}
// rebuild aggregate call
AggregateCall newAggCall = new AggregateCall(newAgg, false, newArgList, fieldType, callName);
return newAggCall;
}
示例2: transformAggCalls
private List<AggregateCall> transformAggCalls(RelNode input, int groupCount,
List<AggregateCall> origCalls) {
final List<AggregateCall> newCalls = Lists.newArrayList();
for (Ord<AggregateCall> ord : Ord.zip(origCalls)) {
final AggregateCall origCall = ord.e;
if (origCall.isDistinct()
|| !SUPPORTED_AGGREGATES.containsKey(origCall.getAggregation()
.getClass())) {
return null;
}
final SqlAggFunction aggFun;
final RelDataType aggType;
if (origCall.getAggregation() == SqlStdOperatorTable.COUNT) {
aggFun = SqlStdOperatorTable.SUM0;
// count(any) is always not null, however nullability of sum might
// depend on the number of columns in GROUP BY.
// Here we use SUM0 since we are sure we will not face nullable
// inputs nor we'll face empty set.
aggType = null;
} else {
aggFun = origCall.getAggregation();
aggType = origCall.getType();
}
AggregateCall newCall =
AggregateCall.create(aggFun, origCall.isDistinct(),
origCall.isApproximate(),
ImmutableList.of(groupCount + ord.i), -1, groupCount, input,
aggType, origCall.getName());
newCalls.add(newCall);
}
return newCalls;
}
示例3: getRollup
public static SqlAggFunction getRollup(SqlAggFunction aggregation) {
if (aggregation == SqlStdOperatorTable.SUM
|| aggregation == SqlStdOperatorTable.MIN
|| aggregation == SqlStdOperatorTable.MAX
|| aggregation == SqlStdOperatorTable.SUM0) {
return aggregation;
} else if (aggregation == SqlStdOperatorTable.COUNT) {
return SqlStdOperatorTable.SUM0;
} else {
return null;
}
}
示例4: getMergeAggFunctionOfTopSplit
@Override public SqlAggFunction getMergeAggFunctionOfTopSplit() {
return SqlStdOperatorTable.SUM0;
}