xtern commented on code in PR #6005:
URL: https://github.com/apache/ignite-3/pull/6005#discussion_r2137961820
##########
modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/exec/ExecutionServiceImpl.java:
##########
@@ -522,13 +524,56 @@ private AsyncDataCursor<InternalSqlRow> executeKill(
return new IteratorToDataCursorAdapter<>(ret, Runnable::run);
}
- @SuppressWarnings("MethodMayBeStatic")
- private AsyncDataCursor<InternalSqlRow> executeExplain(ExplainPlan plan) {
- String planString = plan.plan().explain();
+ private AsyncDataCursor<InternalSqlRow> executeExplain(
+ SqlOperationContext operationContext,
+ ExplainPlan plan
+ ) {
+ switch (plan.mode()) {
+ case PLAN: {
+ String planString = plan.plan().explain();
+
+ InternalSqlRow res = new
InternalSqlRowSingleString(planString);
+
+ return new
IteratorToDataCursorAdapter<>(List.of(res).iterator());
+ }
+ case MAPPING:
+ if (plan.plan() instanceof MultiStepPlan) {
+ QueryTransactionContext txContext =
operationContext.txContext();
+
+ assert txContext != null;
+
+ boolean readOnly =
plan.type().implicitTransactionReadOnlyMode();
+ QueryTransactionWrapper txWrapper = txContext.explicitTx();
+ if (txWrapper != null) {
+ InternalTransaction tx = txWrapper.unwrap();
+ readOnly = tx.isReadOnly();
+ }
+
+ Predicate<String> nodeExclusionFilter =
operationContext.nodeExclusionFilter();
- InternalSqlRow res = new InternalSqlRowSingleString(planString);
+ MappingParameters mappingParameters =
+
MappingParameters.create(operationContext.parameters(), readOnly,
nodeExclusionFilter);
- return new IteratorToDataCursorAdapter<>(List.of(res).iterator());
+ CompletableFuture<List<MappedFragment>> mapping =
mappingService.map((MultiStepPlan) plan.plan(), mappingParameters);
+
+ CompletableFuture<InternalSqlRow> fragments =
FragmentPrinter.fragmentsToString(mapping);
+
+ CompletableFuture<Iterator<InternalSqlRow>> fragments0 =
fragments.thenApply(List::of)
+ .thenApply(List::iterator);
Review Comment:
I prefer to make `String fragmentsToString()` public and remove
`CompletableFuture<InternalSqlRow>
fragmentsToString(CompletableFuture<List<MappedFragment>> fragments)`
```suggestion
CompletableFuture<Iterator<InternalSqlRow>> fragments0 =
mappingService.map((MultiStepPlan) plan.plan(),
mappingParameters)
.thenApply(FragmentPrinter::fragmentsToString)
.thenApply(InternalSqlRowSingleString::new)
.thenApply(InternalSqlRow.class::cast)
.thenApply(List::of)
.thenApply(List::iterator);
```
or simple
```
CompletableFuture<Iterator<InternalSqlRow>> fragments0 =
mappingService.map((MultiStepPlan) plan.plan(),
mappingParameters)
.thenApply(
fragments -> {
String fragmentsString =
FragmentPrinter.fragmentsToString(fragments);
InternalSqlRow row = new
InternalSqlRowSingleString(fragmentsString);
return
List.of(row).iterator();
}
);
```
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