Files
codeql/cpp
Tom Hvitved 1273db5a22 Data flow: Fix bad join-order when getAReadContent has large fan-in
Before (terminated before completion)
```
Evaluated relational algebra for predicate DataFlowImplForHttpClientLibraries#c536b619::store#5#fffff@e5ef07bh with tuple counts:
            151500     ~0%    {4} r1 = SCAN DataFlowImplCommon#4f8df883::Cached::store#4#ffff OUTPUT In.1, In.0, In.2, In.3
            150500     ~0%    {5} r2 = JOIN r1 WITH DataFlowImplCommon#4f8df883::Cached::MkTypedContent#fff_20#join_rhs ON FIRST 1 OUTPUT Lhs.1, Lhs.0, Lhs.2, Lhs.3, Rhs.1
            149500     ~0%    {5} r3 = JOIN r2 WITH num#DataFlowImplForHttpClientLibraries#c536b619::TNodeNormal#ff ON FIRST 1 OUTPUT Lhs.2, Lhs.1, Lhs.3, Lhs.4, Rhs.1
            148500     ~0%    {5} r4 = JOIN r3 WITH num#DataFlowImplForHttpClientLibraries#c536b619::TNodeNormal#ff ON FIRST 1 OUTPUT Lhs.3, Lhs.1, Lhs.2, Lhs.4, Rhs.1
        2003849000     ~0%    {5} r5 = JOIN r4 WITH DataFlowPublic#e1781e31::ContentSet::getAReadContent#0#dispred#ff_10#join_rhs ON FIRST 1 OUTPUT Rhs.1, Lhs.1, Lhs.2, Lhs.3, Lhs.4
         105066500  ~9036%    {5} r6 = JOIN r5 WITH project#DataFlowImplForHttpClientLibraries#c536b619::readSet#4#ffff ON FIRST 1 OUTPUT Lhs.3, Lhs.1, Lhs.4, Lhs.2, Rhs.1
                              return r6
```

After
```
Evaluated relational algebra for predicate DataFlowImplForHttpClientLibraries#c536b619::readProj#2#ff@302620cn with tuple counts:
        1461867  ~0%    {2} r1 = SCAN DataFlowPrivate#462ff392::Cached::TContent#f OUTPUT In.0, In.0
        3549054  ~1%    {2} r2 = JOIN r1 WITH DataFlowPublic#e1781e31::ContentSet::getAReadContent#0#dispred#ff_10#join_rhs ON FIRST 1 OUTPUT Rhs.1, Lhs.1
        5772824  ~5%    {2} r3 = JOIN r2 WITH project#DataFlowImplForHttpClientLibraries#c536b619::readSet#4#ffff ON FIRST 1 OUTPUT Lhs.1, Rhs.1
                        return r3

Evaluated relational algebra for predicate DataFlowImplForHttpClientLibraries#c536b619::store#5#fffff@016cd9o1 with tuple counts:
         267905  ~0%    {4} r1 = SCAN DataFlowImplCommon#4f8df883::Cached::store#4#ffff OUTPUT In.1, In.0, In.2, In.3
         267905  ~0%    {5} r2 = JOIN r1 WITH DataFlowImplCommon#4f8df883::Cached::MkTypedContent#fff_20#join_rhs ON FIRST 1 OUTPUT Lhs.1, Lhs.0, Lhs.2, Lhs.3, Rhs.1
         267905  ~0%    {5} r3 = JOIN r2 WITH num#DataFlowImplForHttpClientLibraries#c536b619::TNodeNormal#ff ON FIRST 1 OUTPUT Lhs.2, Lhs.1, Lhs.3, Lhs.4, Rhs.1
         267905  ~0%    {5} r4 = JOIN r3 WITH num#DataFlowImplForHttpClientLibraries#c536b619::TNodeNormal#ff ON FIRST 1 OUTPUT Lhs.3, Lhs.1, Lhs.2, Lhs.4, Rhs.1
        2109240  ~0%    {5} r5 = JOIN r4 WITH DataFlowImplForHttpClientLibraries#c536b619::readProj#2#ff ON FIRST 1 OUTPUT Lhs.3, Lhs.1, Lhs.4, Lhs.2, Rhs.1
                        return r5
```
2022-09-26 20:37:53 +02:00
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