public override DbExpression Visit(DbUpdateExpression exp)
{
this._sqlBuilder.Append("UPDATE ");
this.AppendTable(exp.Table);
this._sqlBuilder.Append(" SET ");
bool first = true;
foreach (var item in exp.UpdateColumns)
{
if (first)
{
first = false;
}
else
{
this._sqlBuilder.Append(",");
}
this.QuoteName(item.Key.Name);
this._sqlBuilder.Append("=");
DbExpression valExp = DbExpressionExtension.StripInvalidConvert(item.Value);
AmendDbInfo(item.Key, valExp);
DbValueExpressionTransformer.Transform(valExp).Accept(this);
}
this.AppendOutputClause(exp.Returns);
this.BuildWhereState(exp.Condition);
return(exp);
}
public override DbExpression Visit(DbInsertExpression exp)
{
string separator = "";
this._sqlBuilder.Append("INSERT INTO ");
this.AppendTable(exp.Table);
this._sqlBuilder.Append("(");
separator = "";
foreach (var item in exp.InsertColumns)
{
this._sqlBuilder.Append(separator);
this.QuoteName(item.Key.Name);
separator = ",";
}
this._sqlBuilder.Append(")");
this.AppendOutputClause(exp.Returns);
this._sqlBuilder.Append(" VALUES(");
separator = "";
foreach (var item in exp.InsertColumns)
{
this._sqlBuilder.Append(separator);
DbExpression valExp = DbExpressionExtension.StripInvalidConvert(item.Value);
AmendDbInfo(item.Key, valExp);
DbValueExpressionTransformer.Transform(valExp).Accept(this);
separator = ",";
}
this._sqlBuilder.Append(")");
return(exp);
}
static DbExpression EnsureDbExpressionReturnCSharpBoolean(DbExpression exp)
{
return(DbValueExpressionTransformer.Transform(exp));
}
protected virtual void BuildLimitSql(DbSqlQueryExpression exp)
{
bool shouldSortResults = false;
if (exp.TakeCount != null)
{
shouldSortResults = true;
}
else if (this._sqlBuilder.Length == 0)
{
shouldSortResults = true;
}
this._sqlBuilder.Append("SELECT ");
this.AppendDistinct(exp.IsDistinct);
if (exp.TakeCount != null)
{
this._sqlBuilder.Append("TOP ", exp.TakeCount.ToString(), " ");
}
string tableAlias = "T";
List <DbColumnSegment> columns = exp.ColumnSegments;
for (int i = 0; i < columns.Count; i++)
{
DbColumnSegment column = columns[i];
if (i > 0)
{
this._sqlBuilder.Append(",");
}
this.QuoteName(tableAlias);
this._sqlBuilder.Append(".");
this.QuoteName(column.Alias);
this._sqlBuilder.Append(" AS ");
this.QuoteName(column.Alias);
}
this._sqlBuilder.Append(" FROM ");
this._sqlBuilder.Append("(");
//------------------------//
this._sqlBuilder.Append("SELECT ");
for (int i = 0; i < columns.Count; i++)
{
DbColumnSegment column = columns[i];
if (i > 0)
{
this._sqlBuilder.Append(",");
}
DbValueExpressionTransformer.Transform(column.Body).Accept(this);
this._sqlBuilder.Append(" AS ");
this.QuoteName(column.Alias);
}
List <DbOrdering> orderings = exp.Orderings;
if (orderings.Count == 0)
{
DbOrdering ordering = new DbOrdering(UtilConstants.DbParameter_1, DbOrderType.Asc);
orderings = new List <DbOrdering>(1);
orderings.Add(ordering);
}
string row_numberName = GenRowNumberName(columns);
this._sqlBuilder.Append(",ROW_NUMBER() OVER(ORDER BY ");
this.ConcatOrderings(orderings);
this._sqlBuilder.Append(") AS ");
this.QuoteName(row_numberName);
this._sqlBuilder.Append(" FROM ");
exp.Table.Accept(this);
this.BuildWhereState(exp.Condition);
this.BuildGroupState(exp);
//------------------------//
this._sqlBuilder.Append(")");
this._sqlBuilder.Append(" AS ");
this.QuoteName(tableAlias);
this._sqlBuilder.Append(" WHERE ");
this.QuoteName(tableAlias);
this._sqlBuilder.Append(".");
this.QuoteName(row_numberName);
this._sqlBuilder.Append(" > ");
this._sqlBuilder.Append(exp.SkipCount.ToString());
if (shouldSortResults)
{
this._sqlBuilder.Append(" ORDER BY ");
this.QuoteName(tableAlias);
this._sqlBuilder.Append(".");
this.QuoteName(row_numberName);
this._sqlBuilder.Append(" ASC");
}
}
internal void AppendColumnSegment(DbColumnSegment seg)
{
DbValueExpressionTransformer.Transform(seg.Body).Accept(this);
this._sqlBuilder.Append(" AS ");
this.QuoteName(seg.Alias);
}
