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Allow the expressions like 'v.tag' in return #5440

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Mar 28, 2023
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15 changes: 12 additions & 3 deletions src/graph/visitor/PropertyTrackerVisitor.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -208,10 +208,19 @@ void PropertyTrackerVisitor::visit(AttributeExpression *expr) {
auto &propName = constVal.getStr();
switch (lhs->kind()) {
case Expression::Kind::kInputProperty:
case Expression::Kind::kVarProperty: { // $e.name
case Expression::Kind::kVarProperty: {
// maybe: $e.prop
auto *varPropExpr = static_cast<PropertyExpression *>(lhs);
auto &edgeAlias = varPropExpr->prop();
propsUsed_.insertEdgeProp(edgeAlias, unknownType_, propName);
auto &entityAlias = varPropExpr->prop();
propsUsed_.insertEdgeProp(entityAlias, unknownType_, propName);
// maybe: $v.tag
auto ret = qctx_->schemaMng()->toTagID(space_, propName);
if (!ret.ok()) {
status_ = std::move(ret).status();
break;
}
auto tagId = ret.value();
propsUsed_.insertVertexProp(entityAlias, tagId, "*");
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Is it necessary to insert edge and vertex props at same time? maybe only need to handle one branch by checking where the prop is from?

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I just found e.likeness wouldn't reach here... Maybe this part was outdated. Let me check.

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@xtcyclist xtcyclist Mar 28, 2023

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It goes into Kind::kSubscript as $-.e[0]. Maybe we can delete it already. 算了,不敢删。

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Seems like we don't have sufficient information here to tell them apart. Any advise?

break;
}
case Expression::Kind::kCase: { // (case xxx).name
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6 changes: 5 additions & 1 deletion src/graph/visitor/PrunePropertiesVisitor.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -424,7 +424,11 @@ void PrunePropertiesVisitor::pruneCurrent(AppendVertices *node) {
usedProps.insert(unknownIter->second.begin(), unknownIter->second.end());
}
if (tagIter != usedVertexProps.end()) {
usedProps.insert(tagIter->second.begin(), tagIter->second.end());
if (tagIter->second.find("*") != tagIter->second.end()) {
usedProps.insert(props.begin(), props.end());
} else {
usedProps.insert(tagIter->second.begin(), tagIter->second.end());
}
}
if (usedProps.empty()) {
continue;
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4 changes: 2 additions & 2 deletions tests/tck/features/match/Base.IntVid.feature
Original file line number Diff line number Diff line change
Expand Up @@ -1045,8 +1045,8 @@ Feature: Basic match
MATCH (v:player{name:"Tim Duncan"}) RETURN v.player AS vtag
"""
Then the result should be, in any order:
| vtag |
| {name:"Tim Duncan"} |
| vtag |
| {age: 42, name: "Tim Duncan"} |
When executing query:
"""
MATCH (v:player)-[]->(b) WHERE v.age > 30 RETURN v.player.name AS vname
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13 changes: 11 additions & 2 deletions tests/tck/features/match/Base.feature
Original file line number Diff line number Diff line change
Expand Up @@ -1449,8 +1449,17 @@ Feature: Basic match
MATCH (v:player{name:"Tim Duncan"}) RETURN v.player AS vtag
"""
Then the result should be, in any order:
| vtag |
| {name:"Tim Duncan"} |
| vtag |
| {age: 42, name: "Tim Duncan"} |
When executing query:
"""
match (v)
where id(v) == "Tim Duncan"
return v.player, v.bachelor.name
"""
Then the result should be, in any order:
| v.player | v.bachelor.name |
| {age: 42, name: "Tim Duncan"} | "Tim Duncan" |
When executing query:
"""
MATCH (v:player)-[]->(b) WHERE v.age > 30 RETURN v.player.name AS vname
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