public SqlProvider <T> FormatExists()
{
var selectSql = "SELECT TOP 1 1";
var fromTableSql = FormatTableName();
var whereParams = ResolveExpression.ResolveWhere(Context.QuerySet.WhereExpression);
var whereSql = whereParams.SqlCmd;
Params = whereParams.Param;
SqlString = $"{selectSql} {fromTableSql} {whereSql}";
return(this);
}
public SqlProvider <T> FormatSum(LambdaExpression lambdaExpression)
{
var selectSql = ResolveExpression.ResolveSum(typeof(T).GetProperties(), lambdaExpression);
var fromTableSql = FormatTableName();
var whereParams = ResolveExpression.ResolveWhere(Context.QuerySet.WhereExpression);
var whereSql = whereParams.SqlCmd;
Params = whereParams.Param;
SqlString = $"{selectSql} {fromTableSql} {whereSql} ";
return(this);
}
public SqlProvider <T> FormatToList()
{
var selectSql = ResolveExpression.ResolveSelect(typeof(T).GetProperties(), Context.QuerySet.SelectExpression, Context.QuerySet.TopNum);
var fromTableSql = FormatTableName();
var whereParams = ResolveExpression.ResolveWhere(Context.QuerySet.WhereExpression);
var whereSql = whereParams.SqlCmd;
Params = whereParams.Param;
var orderbySql = ResolveExpression.ResolveOrderBy(Context.QuerySet.OrderbyExpressionList);
SqlString = $"{selectSql} {fromTableSql} {whereSql} {orderbySql}";
return(this);
}
public SqlProvider <T> FormatUpdateSelect(Expression <Func <T, T> > updator)
{
var update = ResolveExpression.ResolveUpdate(updator);
var selectSql = ResolveExpression.ResolveSelectOfUpdate(typeof(T).GetProperties(), Context.QuerySet.SelectExpression);
var where = ResolveExpression.ResolveWhere(Context.QuerySet.WhereExpression);
var whereSql = where.SqlCmd;
Params = where.Param;
Params.AddDynamicParams(update.Param);
var topSql = Context.QuerySet.TopNum.HasValue ? " TOP " + Context.QuerySet.TopNum.Value : "";
SqlString = $"UPDATE {topSql} {FormatTableName(false)} WITH ( UPDLOCK, READPAST ) {update.SqlCmd} {selectSql} {whereSql}";
return(this);
}