subsonic/SubSonic-2.0

AnsiSqlGenerator causes SQL syntax error for "where ... in (new select...)" statement

blankers opened this issue · 2 comments

Problem:
duplicate clause is being generated by the following SqlQuery object when using AnsiSqlGenerator:

SubSonic.SqlQuery q = new Select()
  .From(Views.VwSearchIndexQuery2Mtx)
  .Paged(pageNumber, maximumRows)
  .Where(VwSearchIndexQuery2Mtx.Columns.SearchIndexQueryId)
    .In(
        new Select(SearchIndexQueryGroupMap.Columns.SearchIndexQueryId)
          .From(Tables.SearchIndexQueryGroupMap)
          .Where(SearchIndexQueryGroupMap.Columns.SearchIndexQueryGroupId)
          .IsEqualTo(searchIndexQueryGroupId));

This statement works using the Sql2005 & Sql2008 generators.

Reference:
http://stackoverflow.com/questions/1711798/subsonic-2-2-sqlquery-object-generates-very-different-sql-for-where-in-stateme

This is the same issue that's caused by the one documented in issue 7. The IsSQL2008 function returns false if you are using R2 or SP1 of SQL Server 2008.

how to fix:

in ANSISqlGenerator.cs > virtual string BuildPagedSelectStatement()
change string tweakedWheres = wheres.Replace("WHERE", "AND");
to: string tweakedWheres = Sugar.Strings.ReplaceFirst(wheres, "WHERE", "AND", StringComparison.OrdinalIgnoreCase);

and add to sugar > String new method :

///

    /// Replace only first match
    /// </summary>


    /// <param name="originalString"></param>
    /// <param name="oldValue"></param>
    /// <param name="newValue"></param>
    /// <param name="comparisonType"></param>
    /// <returns></returns>
    public static string ReplaceFirst(string originalString, string oldValue, string newValue, StringComparison comparisonType)
    {
        int startIndex = 0;
            startIndex = originalString.IndexOf(oldValue, startIndex, comparisonType);
            if (startIndex != -1)
            {

                originalString = originalString.Substring(0, startIndex) + newValue + originalString.Substring(startIndex + oldValue.Length);

                startIndex += newValue.Length;
            }


        return originalString;
    }