public static ExprQuerySpecification WithCrossJoin(this ExprQuerySpecification querySpecification, IExprTableSource tableSource)
{
if (querySpecification.From == null)
{
throw new SqExpressException("Query Specification \"From\" cannot be null");
}
var newJoin = new ExprCrossedTable(querySpecification.From, tableSource);
return(querySpecification.WithFrom(newJoin));
}
private static ExprQuerySpecification JoinQuerySpecification(ExprJoinedTable.ExprJoinType exprJoinType,
ExprQuerySpecification querySpecification, IExprTableSource tableSource, ExprBoolean @on)
{
if (querySpecification.From == null)
{
throw new SqExpressException("Query Specification \"From\" cannot be null");
}
var newJoin = new ExprJoinedTable(querySpecification.From, exprJoinType, tableSource, on);
return(querySpecification.WithFrom(newJoin));
}