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Towards 1529: replacing the predicates with an IEnumerable on IRowToRowMapper.GetDependencies #2504

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@sfilipi @Ivanidzo4ka @TomFinley @yaeldekel
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sfilipi commented Feb 11, 2019

More work towards #1529.

Marked the pr as still working on it, because there is one test failing: TestAndPredictoOnIris; double-checking the changes on the CompositeRowToRowMapper.

@sfilipi sfilipi requested review from TomFinley , Ivanidzo4ka and yaeldekel Feb 11, 2019

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sfilipi reviewed Feb 11, 2019
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src/Microsoft.ML.TimeSeries/SequentialTransformerBase.cs Outdated
var predicateOut = GetActiveOutputColumns(active);

// Now map those to active input columns.
var predicateIn = _mapper.GetDependencies(predicateOut);

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sfilipi Feb 11, 2019 •
edited

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call method above #Resolved
@yaeldekel

yaeldekel reviewed Feb 11, 2019
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src/Microsoft.ML.Data/DataView/CompositeRowToRowMapper.cs Outdated
for (int i = InnerMappers.Length - 1; i >= 0; --i)
toReturn = InnerMappers[i].GetDependencies(toReturn);
return toReturn;
columnsNeeded = columnsNeeded.Union(InnerMappers[i].GetDependencies(columnsNeeded));

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@yaeldekel

yaeldekel Feb 11, 2019 •
edited by sfilipi

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Union [](start = 46, length = 5)

Is this needed? The old code seems to "forget" each intermediate mapper's predicate and only return the dependencies of the first one. #Resolved

@sfilipi sfilipi self-assigned this Feb 12, 2019

@sfilipi sfilipi added the api label Feb 12, 2019

@sfilipi sfilipi added this to In progress in Project 13 via automation Feb 12, 2019

@sfilipi sfilipi added this to the 0219 milestone Feb 12, 2019

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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Transforms/OptionalColumnTransform.cs Outdated
Contracts.AssertValue(dependingColumns);

var active = GetActiveInput(dependingColumns);
Contracts.Assert(active.Count() == Input.Count);

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sfilipi Feb 12, 2019 •
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call the method above #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Ensemble/PipelineEnsemble.cs Outdated
var mapperColumns = Mappers[i].OutputSchema.Where(col => mapperPredicate(col.Index));
var inputColumns = Mappers[i].GetDependencies(mapperColumns);

Func<int, bool> inputPredicate = c => BoundPipelines[i].OutputSchema.Count() < c;

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sfilipi Feb 12, 2019 •
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inputPredicate = c => BoundPipelines[i].OutputSchema.Count() < c; [](start = 40, length = 65)

fix #Resolved
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sfilipi commented Feb 12, 2019 •
edited 

        }

remove #Resolved

Refers to: src/Microsoft.ML.Data/Transforms/ColumnSelecting.cs:709 in 5b99fe2. [](commit_id = 5b99fe2, deletion_comment = False)
@sfilipi

sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/RowToRowScorerBase.cs Outdated
var predicateInputForMapper = bindings.RowMapper.GetDependencies(predicateMapper);
// Get the active output columns
var activeOutputCols = bindings.RowMapper.OutputSchema.Where(c => localMapper(c.Index));
var predicateInputForMapper = bindings.RowMapper.GetDependencies(activeOutputCols);

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sfilipi Feb 12, 2019 •
edited

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predicate [](start = 16, length = 9)

rename
#Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/FeatureContributionCalculation.cs Outdated
return col => false;
}
IEnumerable<Schema.Column> IRowToRowMapper.GetDependencies(IEnumerable<Schema.Column> dependingColumns)
=> Enumerable.Repeat(FeatureColumn, 1);

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sfilipi Feb 12, 2019 •
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Enumerable.Repeat(FeatureColumn, 1); [](start = 14, length = 37)

fix #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/EntryPoints/TransformModelImpl.cs Outdated
while (transform != null)
{
var mapper = transform as IRowToRowMapper;
_ectx.AssertValue(mapper);
pred = mapper.GetDependencies(pred);
dependingColumns = dependingColumns.Union(mapper.GetDependencies(cols));

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sfilipi Feb 12, 2019 •
edited

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Union [](start = 56, length = 5)

remove #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/EntryPoints/TransformModelImpl.cs Outdated
@@ -252,13 +256,15 @@ public Row GetRow(Row input, Func<int, bool> active)
var actives = new List<Func<int, bool>>();
var transform = _chain as IDataTransform;
var activeCur = active;
var activeCurCol = InputSchema.Where(col => active(col.Index));

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sfilipi Feb 12, 2019 •
edited

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InputSchema [](start = 35, length = 11)

output #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/EntryPoints/TransformModelImpl.cs Outdated
@@ -252,13 +256,16 @@ public Row GetRow(Row input, Func<int, bool> active)
var actives = new List<Func<int, bool>>();
var transform = _chain as IDataTransform;
var activeCur = active;
var activeCurCol = OutputSchema.Where(col => active(col.Index));

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sfilipi Feb 12, 2019 •
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activeCurCol [](start = 20, length = 12)

remove, implement without it. #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/SchemaBindablePredictorWrapper.cs Outdated
if (dependingColumns.Count() == 0 || !InputRoleMappedSchema.Feature.HasValue)
return Enumerable.Empty<Schema.Column>();

return InputSchema.Where(col => col.Name.Equals(InputRoleMappedSchema.Feature?.Name));

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sfilipi Feb 12, 2019 •
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col => col.Name.Equals(InputRoleMappedSchema.Feature?.Name [](start = 41, length = 58)

base it on the index #Resolved
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sfilipi reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/SchemaBindablePredictorWrapper.cs Outdated
if (dependingColumns.Count() == 0 || !InputRoleMappedSchema.Feature.HasValue)
return Enumerable.Empty<Schema.Column>();

return InputSchema.Where(col => col.Name.Equals(InputRoleMappedSchema.Feature?.Name));

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sfilipi Feb 12, 2019 •
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col => col.Name.Equals(InputRoleMappedSchema.Feature?.Name [](start = 41, length = 58)

base it on the index #Resolved

@sfilipi sfilipi changed the title [WIP] towards 1529: replacing the predicates with an IEnumerable on IRowToRowMapper.GetDependencies Towards 1529: replacing the predicates with an IEnumerable on IRowToRowMapper.GetDependencies Feb 12, 2019

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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/DataView/CompositeRowToRowMapper.cs Outdated
deps[i - 1] = InnerMappers[i].GetDependencies(deps[i]);
{
var outputColumns = InnerMappers[i].OutputSchema.Where(c => deps[i](c.Index));
var cols = InnerMappers[i].GetDependencies(outputColumns);

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Ivanidzo4ka Feb 12, 2019 •
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GetDependencies [](start = 43, length = 15)

I would put ToArray to cache it. Otherwise you constantly fetch results from IEnumerable
Well techinacally only twice, one in Count one in Any. #Closed
@Ivanidzo4ka

Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/DataView/RowToRowMapperTransform.cs Outdated
@@ -245,11 +238,14 @@ void ISaveAsPfa.SaveAsPfa(BoundPfaContext ctx)
}
}

public Func<int, bool> GetDependencies(Func<int, bool> predicate)
/// <summary>
/// Given a set of columns, return the input columns that are needed to generate those output columns.

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Ivanidzo4ka Feb 12, 2019 •
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set of columns [](start = 20, length = 14)

set of output columns? #Closed
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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Prediction/Calibrator.cs Outdated
}
return col => false;
var columnNames = dependingColumns.Select(col => col.Name);

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Ivanidzo4ka Feb 12, 2019 •
edited

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Looks excessive. I mean, you don't use it, right? #Closed
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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/SchemaBindablePredictorWrapper.cs Outdated
return col => col == InputRoleMappedSchema.Feature.Value.Index;
}
return col => false;
if (dependingColumns.Count() == 0 || !InputRoleMappedSchema.Feature.HasValue)

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Ivanidzo4ka Feb 12, 2019 •
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if (dependingColumns.Count() == 0 || !InputRoleMappedSchema.Feature.HasValue) [](start = 16, length = 77)

Micro optimization but i would switch order. #Closed
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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Transforms/NopTransform.cs Outdated
/// Given a set of columns, return the input columns that are needed to generate those output columns.
/// </summary>
IEnumerable<Schema.Column> IRowToRowMapper.GetDependencies(IEnumerable<Schema.Column> dependingColumns)
=> dependingColumns;

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Ivanidzo4ka Feb 12, 2019 •
edited

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If you look few lines above we have example of different style for =>.
Can we put tab here? (not tab, 4 spaces, we are not barbarians) #Closed
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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Transforms/ColumnSelecting.cs Outdated
{
var activeOutput = RowCursorUtils.FromColumnsToPredicate(columns, _mapper.OutputSchema);

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Ivanidzo4ka Feb 12, 2019 •
edited

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FromColumnsToPredicate [](start = 50, length = 22)

You will need to untangle it sooner or later :)
Right now I don't see any reason to use predicate. We get set of columns we return set of columns, and we don't call any function which required predicate.
But you can always postpone it to moment when we delete than Utils method #Closed

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sfilipi Feb 12, 2019

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You know, that Utils method might stay for a while, because GetActive is not public...

untangling this now:)

In reply to: 256133342 [](ancestors = 256133342)
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codecov bot commented Feb 12, 2019 •
edited

Codecov Report

Merging #2504 into master will decrease coverage by <.01%.
The diff coverage is 74.56%.

@@            Coverage Diff             @@
##           master    #2504      +/-   ##
==========================================
- Coverage   71.26%   71.26%   -0.01%     
==========================================
  Files         797      797              
  Lines      141292   141278      -14     
  Branches    16118    16097      -21     
==========================================
- Hits       100692   100677      -15     
- Misses      36138    36141       +3     
+ Partials     4462     4460       -2
Flag Coverage Δ
#Debug 71.26% <74.56%> (-0.01%) ⬇️
#production 67.59% <74.56%> (-0.01%) ⬇️
#test 85.35% <ø> (-0.02%) ⬇️
@Ivanidzo4ka

Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Data/Scorers/MultiClassClassifierScorer.cs Outdated
/// Given a set of columns, return the input columns that are needed to generate those output columns.
/// </summary>
IEnumerable<Schema.Column> IRowToRowMapper.GetDependencies(IEnumerable<Schema.Column> dependingColumns)
=> _mapper.GetDependencies(dependingColumns);

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Ivanidzo4ka Feb 12, 2019 •
edited

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=> [](start = 15, length = 3)

somehow this triggers me. can you add tab? #Closed

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sfilipi Feb 12, 2019

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I will add 4 spaces ;)

In reply to: 256133529 [](ancestors = 256133529)
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Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.Ensemble/PipelineEnsemble.cs Outdated

return InputSchema.Where(col => _inputColIndices.Contains(col.Index));

//return Enumerable.Repeat(InputSchema.First(col => _inputColIndices.Contains(col.Index)), 1);

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Ivanidzo4ka Feb 12, 2019 •
edited

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//return Enumerable.Repeat(InputSchema.First(col => _inputColIndices.Contains(col.Index)), 1); [](start = 16, length = 94)

clean it #Closed
@Ivanidzo4ka

Ivanidzo4ka reviewed Feb 12, 2019
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src/Microsoft.ML.TimeSeries/SequentialTransformerBase.cs Outdated
}
return col => false;
var columnNames = dependingColumns.Select(col => col.Name);
return InputSchema.Where(col => columnNames.Contains(col.Name));

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Ivanidzo4ka Feb 12, 2019 •
edited

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InputSchema [](start = 23, length = 11)

was it mistake in previous code? We used to filter by OutputSchema, now it's InputSchema #Closed

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sfilipi Feb 12, 2019 •
edited

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The description of the function was:

"Given a predicate specifying which columns are needed, return a predicate indicating which input columns are
needed. " So i took it as : input is columns from the outputschema, and return value is columns from the input schema.

i thought the iteration is over the OutputSchema, since the predicate was over the OutputSchema.

hmm, going back to the IRowToRowMapper, summary:

" The domain of the function is defined over the indices of the columns of for ."

but InputSchema => OutputSchema makes no sense, to me?

In reply to: 256136896 [](ancestors = 256136896)

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yaeldekel Feb 13, 2019

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"The domain of the function is defined...", I think this refers to the predicate returned by GetDependencies().

The way I understand the old code is - if any columns are active, then activate all the input columns. If this is correct, then the new code should return all the columns of InputSchema if dependingColumns is not empty, and an empty enumerable if dependingColumns is empty.

In reply to: 256140629 [](ancestors = 256140629,256136896)

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sfilipi Feb 13, 2019

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thanks @yaeldekel

In reply to: 256199343 [](ancestors = 256199343,256140629,256136896)
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/DataView/RowToRowMapperTransform.cs Outdated
{
int n = _bindings.Schema.Count;
var active = Utils.BuildArray(n, predicate);
Contracts.Assert(active.Length == n);

var activeInput = _bindings.GetActiveInput(predicate);
Contracts.Assert(activeInput.Length == _bindings.InputSchema.Count);
Contracts.Assert(activeInput.Count() == _bindings.InputSchema.Count);

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yaeldekel Feb 13, 2019 •
edited by sfilipi

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Count [](start = 41, length = 5)

Is activeInput not an array? #Resolved
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/DataView/RowToRowMapperTransform.cs Outdated
@@ -164,8 +163,8 @@ private bool[] GetActive(Func<int, bool> predicate, out Func<int, bool> predicat
var predicateIn = _mapper.GetDependencies(predicateOut);

// Combine the two sets of input columns.
predicateInput =
col => 0 <= col && col < activeInput.Length && (activeInput[col] || predicateIn(col));
inputColumns = _bindings.InputSchema.Where(col => col.Index < activeInput.Length

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yaeldekel Feb 13, 2019 •
edited by sfilipi

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col => col.Index < activeInput.Length [](start = 55, length = 37)

I think this should always be true, given the assert in line 157 above. #Resolved
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/EntryPoints/TransformModelImpl.cs Outdated
while (transform != null)
{
var mapper = transform as IRowToRowMapper;
_ectx.AssertValue(mapper);
pred = mapper.GetDependencies(pred);
dependingColumns = mapper.GetDependencies(cols);

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yaeldekel Feb 13, 2019 •
edited by sfilipi

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dependingColumns [](start = 20, length = 16)

Shouldn't this also be cols? #Resolved
@Ivanidzo4ka

Ivanidzo4ka reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Transforms/ColumnSelecting.cs Outdated
{
var activeOutput = RowCursorUtils.FromColumnsToPredicate(columns, _mapper.OutputSchema);

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Ivanidzo4ka Feb 13, 2019 •
edited by sfilipi

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activeOutput [](start = 20, length = 12)

You no longer use this one. #Resolved
@TomFinley

TomFinley reviewed Feb 13, 2019
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src/Microsoft.ML.Data/DataView/CompositeRowToRowMapper.cs Outdated
{
var outputColumns = InnerMappers[i].OutputSchema.Where(c => deps[i](c.Index));
var cols = InnerMappers[i].GetDependencies(outputColumns).ToArray();
deps[i - 1] = c => cols.Count() > 0 ? cols.Any(col => col.Index == c) : false;

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TomFinley Feb 13, 2019 •
edited by sfilipi

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Count() [](start = 40, length = 7)

Length. Note that Count() the method will actually iterate and literally count. #Resolved
@TomFinley

TomFinley reviewed Feb 13, 2019
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src/Microsoft.ML.Data/DataView/RowToRowMapperTransform.cs Outdated
@@ -164,8 +163,7 @@ private bool[] GetActive(Func<int, bool> predicate, out Func<int, bool> predicat
var predicateIn = _mapper.GetDependencies(predicateOut);

// Combine the two sets of input columns.
predicateInput =
col => 0 <= col && col < activeInput.Length && (activeInput[col] || predicateIn(col));
inputColumns = _bindings.InputSchema.Where(col => activeInput[col.Index]|| predicateIn(col.Index));

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TomFinley Feb 13, 2019 •
edited by sfilipi

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]| [](start = 83, length = 2)

Spacing, try ctrl-k-d #Resolved
@TomFinley

TomFinley reviewed Feb 13, 2019
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src/Microsoft.ML.Data/DataView/RowToRowMapperTransform.cs Outdated
GetActive(predicate, out predicateInput);
return predicateInput;
var predicate = RowCursorUtils.FromColumnsToPredicate(dependingColumns, OutputSchema);
GetActive(predicate, out IEnumerable<Schema.Column> inputColumns);

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TomFinley Feb 13, 2019 •
edited by sfilipi

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IEnumerable<Schema.Column> [](start = 37, length = 26)

Don't be afraid of out var. This will ultimately make @eerhardt's job of renaming this sort of thing easier if you want a selfless reason to do so. #Resolved
@TomFinley

TomFinley reviewed Feb 13, 2019
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src/Microsoft.ML.Data/EntryPoints/TransformModelImpl.cs Outdated
@@ -258,7 +262,8 @@ public Row GetRow(Row input, Func<int, bool> active)
_ectx.AssertValue(mapper);
mappers.Add(mapper);
actives.Add(activeCur);
activeCur = mapper.GetDependencies(activeCur);
var activeCurCol = mapper.GetDependencies(mapper.OutputSchema.Where(col => activeCur(col.Index)));
activeCur = c => activeCurCol.Any(col => col.Index == c);

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@TomFinley

TomFinley Feb 13, 2019 •
edited by sfilipi

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activeCurCol.Any(col => col.Index == c); [](start = 37, length = 40)

I don't like this usage of Any that I've been seeing... using quadratic algorithms is probably best avoided. Did we not have a utility method to take care of this predicate mapping problem? I think we did. #Resolved

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@TomFinley

TomFinley Feb 13, 2019

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internal static Func<int, bool> FromColumnsToPredicate(IEnumerable<Schema.Column> columnsNeeded, Schema sourceSchema), you called it, in RowCursorUtils.

In reply to: 256593471 [](ancestors = 256593471)
@Ivanidzo4ka

Ivanidzo4ka approved these changes Feb 13, 2019
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:shipit:

@sfilipi sfilipi force-pushed the sfilipi:getDependanciesRemovePredicates branch from 8da2253 to 3a7d3da Feb 13, 2019

@sfilipi
fixing mistake during rebase.
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@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Scorers/SchemaBindablePredictorWrapper.cs
if (!InputRoleMappedSchema.Feature.HasValue || dependingColumns.Count() == 0)
return Enumerable.Empty<Schema.Column>();

return InputSchema.Where(col => col.Index == InputRoleMappedSchema.Feature.Value.Index);

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yaeldekel Feb 13, 2019

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InputSchema.Where(col => col.Index == InputRoleMappedSchema.Feature.Value.Index); [](start = 23, length = 81)

Isn't this InputRoleMappedSchema.Feature?
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Scorers/SchemaBindablePredictorWrapper.cs
if (dependingColumns.Count() == 0 || !InputRoleMappedSchema.Feature.HasValue)
return Enumerable.Empty<Schema.Column>();

return InputSchema.Where(col => col.Index == InputRoleMappedSchema.Feature.Value.Index);

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yaeldekel Feb 13, 2019

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InputSchema.Where(col => col.Index == InputRoleMappedSchema.Feature.Value.Index); [](start = 23, length = 81)

Here too.
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Transforms/ColumnBindingsBase.cs
@@ -589,6 +589,16 @@ public bool[] GetActive(Func<int, bool> predicate)
return Utils.BuildArray(ColumnCount, predicate);
}

/// <summary>
/// The given predicate maps from output column index to whether the column is active.

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yaeldekel Feb 13, 2019

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predicate [](start = 22, length = 9)

Update the comment.
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Transforms/ColumnBindingsBase.cs
@@ -609,6 +619,19 @@ public bool[] GetActiveInput(Func<int, bool> predicate)
return active;
}

/// <summary>
/// The given predicate maps from output column index to whether the column is active.

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yaeldekel Feb 13, 2019

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predicate [](start = 22, length = 9)

Update the comment.
@yaeldekel

yaeldekel reviewed Feb 13, 2019
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src/Microsoft.ML.Data/Transforms/ColumnBindingsBase.cs
@@ -763,6 +786,18 @@ public bool[] GetActiveInput(Func<int, bool> predicate)
}
return active;
}

/// <summary>
/// The given predicate maps from output column index to whether the column is active.

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yaeldekel Feb 13, 2019

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predicate [](start = 22, length = 9)

Update the comment.

@shauheen shauheen removed this from In progress in Project 13 Feb 21, 2019

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