public void Test_can_parse_single_condition_as_expression()
{
CmsqlParser cmsqlParser = CmsqlParserFactory.CreateParserForQuery("where foo != 'bar'");
CmsqlParser.WhereClauseContext parseTree = cmsqlParser.whereClause();
WhereClauseVisitor visitor = new WhereClauseVisitor();
ICmsqlQueryExpression expression = visitor.VisitWhereClause(parseTree);
expression.Should().BeOfType <CmsqlQueryCondition>();
}
public void Test_can_parse_grouped_expression_and_condition()
{
CmsqlParser cmsqlParser = CmsqlParserFactory.CreateParserForQuery("where (bar = 'foo' and foo = 'bar') or foo != 'bar'");
CmsqlParser.WhereClauseContext parseTree = cmsqlParser.whereClause();
WhereClauseVisitor visitor = new WhereClauseVisitor();
CmsqlQueryBinaryExpression binaryExpression = visitor.VisitWhereClause(parseTree) as CmsqlQueryBinaryExpression;
binaryExpression.Operator.ShouldBeEquivalentTo(ConditionalOperator.Or);
binaryExpression.LeftExpression.Should().BeOfType <CmsqlQueryBinaryExpression>();
binaryExpression.RightExpression.Should().BeOfType <CmsqlQueryCondition>();
}
public override CmsqlQuery VisitQuery(CmsqlParser.QueryContext context)
{
CmsqlQuery query = new CmsqlQuery();
SelectClauseVisitor selectClauseVisitor = new SelectClauseVisitor();
query.ContentType = context.selectClause().Accept(selectClauseVisitor);
FromClauseVisitor fromClauseVisitor = new FromClauseVisitor();
query.StartNode = context.fromClause().Accept(fromClauseVisitor);
CmsqlParser.WhereClauseContext whereClauseContext = context.whereClause();
if (whereClauseContext != null)
{
WhereClauseVisitor whereClauseVisitor = new WhereClauseVisitor();
query.Criteria = whereClauseContext.Accept(whereClauseVisitor);
}
return(query);
}
public override ICmsqlQueryExpression VisitWhereClause(CmsqlParser.WhereClauseContext context)
{
ExpressionVisitor expressionVisitor = new ExpressionVisitor();
return(context.expression().Accept(expressionVisitor));
}