public void TestFilterGroup_Optimize_SimplifiesConditions()
{
FilterGroup topFilter = new FilterGroup(Conjunction.Or,
new FilterGroup(Conjunction.And,
new EqualToFilter(new Column("FirstName"), new StringLiteral("Albert")),
new FilterGroup(Conjunction.And,
new EqualToFilter(new Column("LastName"), new StringLiteral("Einstein")))),
new FilterGroup(Conjunction.And,
new EqualToFilter(new Column("FirstName"), new StringLiteral("Max")),
new FilterGroup(Conjunction.And,
new EqualToFilter(new Column("LastName"), new StringLiteral("Planck")))));
wrapInParentheses(topFilter, true);
SelectBuilder selectBuilder = new SelectBuilder();
selectBuilder.AddTable(new Table("Person"));
selectBuilder.AddProjection(new Column("FirstName"));
selectBuilder.AddProjection(new Column("LastName"));
selectBuilder.AddWhere(topFilter);
Formatter formatter = new Formatter();
string beforeActual = formatter.GetCommandText(selectBuilder);
const string beforeExpected = "SELECT FirstName, LastName FROM Person WHERE (((FirstName = 'Albert') AND ((LastName = 'Einstein'))) OR ((FirstName = 'Max') AND ((LastName = 'Planck'))))";
Assert.AreEqual(beforeExpected, beforeActual, "The initial query had an unexpected string representation.");
wrapInParentheses(topFilter, false);
topFilter.Optimize();
wrapInParentheses(topFilter, true);
string afterActual = formatter.GetCommandText(selectBuilder, new CommandOptions() { WrapFiltersInParentheses = true });
const string afterExpected = "SELECT FirstName, LastName FROM Person WHERE (((FirstName = 'Albert') AND (LastName = 'Einstein')) OR ((FirstName = 'Max') AND (LastName = 'Planck')))";
Assert.AreEqual(afterExpected, afterActual, "The optimized query had an unexpected string representation.");
}
private void buildCondition(MatchResult result, ConditionalCase options)
{
MatchResult expressionResult = result.Matches[SqlGrammar.Condition.Filter];
IFilter innerFilter = buildOrFilter(expressionResult);
MatchResult valueResult = result.Matches[SqlGrammar.Condition.Value];
IProjectionItem value = (IProjectionItem)buildArithmeticItem(valueResult);
FilterGroup filterGroup = new FilterGroup(Conjunction.And, innerFilter);
filterGroup.Optimize();
options.AddBranch(filterGroup, value);
}
