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SERVER-2864 allow generating a query pattern when there is an invalid range for a field

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This commit is contained in:
Aaron
2011-09-12 22:51:36 -07:00
parent 5410320e7c
commit 9cc4038d7e
6 changed files with 69 additions and 29 deletions
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45
db/querypattern.cpp
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@@ -19,6 +19,29 @@
namespace mongo {
QueryPattern::QueryPattern( const FieldRangeSet &frs, const BSONObj &sort ) {
for( map<string,FieldRange>::const_iterator i = frs.ranges().begin(); i != frs.ranges().end(); ++i ) {
if ( i->second.equality() ) {
_fieldTypes[ i->first ] = QueryPattern::Equality;
}
else if ( i->second.empty() ) {
// This case generally results from an upper and lower bound that are inconsistent for a single key index.
_fieldTypes[ i->first ] = QueryPattern::UpperAndLowerBound;
}
else if ( i->second.nontrivial() ) {
bool upper = i->second.max().type() != MaxKey;
bool lower = i->second.min().type() != MinKey;
if ( upper && lower )
_fieldTypes[ i->first ] = QueryPattern::UpperAndLowerBound;
else if ( upper )
_fieldTypes[ i->first ] = QueryPattern::UpperBound;
else if ( lower )
_fieldTypes[ i->first ] = QueryPattern::LowerBound;
}
}
setSort( sort );
}
/** for testing only - speed unimportant */
bool QueryPattern::operator==( const QueryPattern &other ) const {
bool less = operator<( other );
@@ -32,6 +55,28 @@ namespace mongo {
return !operator==( other );
}
string typeToString( enum QueryPattern::Type t ) {
switch (t) {
case QueryPattern::Equality:
return "Equality";
case QueryPattern::LowerBound:
return "LowerBound";
case QueryPattern::UpperBound:
return "UpperBound";
case QueryPattern::UpperAndLowerBound:
return "UpperAndLowerBound";
}
return "";
}
string QueryPattern::toString() const {
BSONObjBuilder b;
for( map<string,Type>::const_iterator i = _fieldTypes.begin(); i != _fieldTypes.end(); ++i ) {
b << i->first << typeToString( i->second );
}
return BSON( "query" << b.done() << "sort" << _sort ).toString();
}
void QueryPattern::setSort( const BSONObj sort ) {
_sort = normalizeSort( sort );
}