vvysotskyi commented on a change in pull request #2389:
URL: https://github.com/apache/drill/pull/2389#discussion_r775158618
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File path:
contrib/format-iceberg/src/main/java/org/apache/drill/exec/store/iceberg/plan/IcebergPluginImplementor.java
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@@ -144,7 +155,23 @@ public boolean splitProject(Project project) {
@Override
public boolean canImplement(Project project) {
- return true;
+ RelTraitSet traitSet = project.getInput().getTraitSet();
+ if (!traitSet.isEmpty()) {
+ RelTrait trait = traitSet.get(0);
+ if (trait instanceof Convention) {
+ Convention c = (Convention) trait;
+ if (StringUtils.contains(c.getName(),
IcebergFormatPlugin.ICEBERG_CONVENTION_PREFIX)) {
+ return true; // accept the iceberg queries
+ }
+ }
+ }
+ List<String> fields = project.getInput().getRowType().getFieldNames();
+ if (!fields.isEmpty()) {
+ if(StringUtils.equals(SchemaPath.DYNAMIC_STAR, fields.get(0))) {
+ return true; // accept the plan queries of iceberg
+ }
+ }
+ return false; // does not affect other format and storage
Review comment:
I don't think that we should rely on the convention of input rel node.
It could have any convention, but the rule will be responsible for the
conversion of input. Please see this line as an example:
https://github.com/apache/drill/blob/ec76ad05680612b84147993d66312f040430cac0/exec/java-exec/src/main/java/org/apache/drill/exec/store/plan/rule/PluginProjectRule.java#L56.
If no conversion of input happened, the planner will accept another plan where
all children were converted.
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