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3 changes: 3 additions & 0 deletions docs/Design/Algebra Layer.md
Original file line number Diff line number Diff line change
Expand Up @@ -563,6 +563,9 @@ int Algebra::join(char srcRelation1[ATTR_SIZE], char srcRelation2[ATTR_SIZE], ch
Attribute record2[numOfAttributes2];
Attribute targetRecord[numOfAttributesInTarget];

// reset the search index of `srcRelation1` in the relation cache
// using RelCacheTable::resetSearchIndex()

// this loop is to get every record of the srcRelation1 one by one
while (BlockAccess::project(srcRelId1, record1) == SUCCESS) {

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