void analyzeWhereExpression(ArrayList<AbstractExpression> whereList) {
// This next bit of code identifies which tables get classified how
HashSet<Table> tableSet = new HashSet<Table>();
for (AbstractExpression expr : whereList) {
tableSet.clear();
getTablesForExpression(expr, tableSet);
if (tableSet.size() == 0) {
noTableSelectionList.add(expr);
} else if (tableSet.size() == 1) {
Table table = (Table) tableSet.toArray()[0];
ArrayList<AbstractExpression> exprs;
if (tableFilterList.containsKey(table)) {
exprs = tableFilterList.get(table);
} else {
exprs = new ArrayList<AbstractExpression>();
tableFilterList.put(table, exprs);
}
expr.m_isJoiningClause = false;
addExprToEquivalenceSets(expr);
exprs.add(expr);
} else if (tableSet.size() == 2) {
TablePair pair = new TablePair();
pair.t1 = (Table) tableSet.toArray()[0];
pair.t2 = (Table) tableSet.toArray()[1];
ArrayList<AbstractExpression> exprs;
if (joinSelectionList.containsKey(pair)) {
exprs = joinSelectionList.get(pair);
} else {
exprs = new ArrayList<AbstractExpression>();
joinSelectionList.put(pair, exprs);
}
expr.m_isJoiningClause = true;
addExprToEquivalenceSets(expr);
exprs.add(expr);
} else if (tableSet.size() > 2) {
multiTableSelectionList.add(expr);
}
}
}
