private static void CreateBufferedValue(ExpressionNode expression, ICollection <ComputedValueDefinition> computedColumnList, ICollection <RowBufferEntry> columnList, IEnumerable <ComputedValueDefinition> alreadyComputedBufferedValues)
{
if (alreadyComputedBufferedValues != null)
{
expression = ReplaceAlreadyComputedSubsequences(expression, alreadyComputedBufferedValues);
}
foreach (ComputedValueDefinition computedBufferedValue in computedColumnList)
{
if (expression.IsStructuralEqualTo(computedBufferedValue.Expression))
{
columnList.Add(computedBufferedValue.Target);
return;
}
}
RowBufferEntryExpression rowBufferExpression = expression as RowBufferEntryExpression;
if (rowBufferExpression != null)
{
columnList.Add(rowBufferExpression.RowBufferEntry);
}
else
{
RowBufferEntry rowBufferEntry = new RowBufferEntry(expression.ExpressionType);
columnList.Add(rowBufferEntry);
ComputedValueDefinition computedValue = new ComputedValueDefinition();
computedValue.Target = rowBufferEntry;
computedValue.Expression = expression;
computedColumnList.Add(computedValue);
}
}
public static int FindStructuralEquivalentExpression(ExpressionNode[] expressions, ExpressionNode expr)
{
for (int i = 0; i < expressions.Length; i++)
{
ExpressionNode node = expressions[i];
if (node.IsStructuralEqualTo(expr))
{
return(i);
}
}
return(-1);
}
public override AstNode Visit(AstNode node)
{
ExpressionNode expression = node as ExpressionNode;
if (expression != null)
{
foreach (ComputedValueDefinition computedBufferedValue in _computedValues)
{
if (expression.IsStructuralEqualTo(computedBufferedValue.Expression))
{
RowBufferEntryExpression rowBufferExpression = new RowBufferEntryExpression();
rowBufferExpression.RowBufferEntry = computedBufferedValue.Target;
return(rowBufferExpression);
}
}
}
return(base.Visit(node));
}
private static void CreateBufferedValue(ExpressionNode expression, ICollection<ComputedValueDefinition> computedColumnList, ICollection<RowBufferEntry> columnList, IEnumerable<ComputedValueDefinition> alreadyComputedBufferedValues)
{
if (alreadyComputedBufferedValues != null)
expression = ReplaceAlreadyComputedSubsequences(expression, alreadyComputedBufferedValues);
foreach (ComputedValueDefinition computedBufferedValue in computedColumnList)
{
if (expression.IsStructuralEqualTo(computedBufferedValue.Expression))
{
columnList.Add(computedBufferedValue.Target);
return;
}
}
RowBufferEntryExpression rowBufferExpression = expression as RowBufferEntryExpression;
if (rowBufferExpression != null)
{
columnList.Add(rowBufferExpression.RowBufferEntry);
}
else
{
RowBufferEntry rowBufferEntry = new RowBufferEntry(expression.ExpressionType);
columnList.Add(rowBufferEntry);
ComputedValueDefinition computedValue = new ComputedValueDefinition();
computedValue.Target = rowBufferEntry;
computedValue.Expression = expression;
computedColumnList.Add(computedValue);
}
}