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