Hello Aly, please, check that the Excel file already contains a worksheet "TransformerTypeStoragePeriodProducts". The first line of the worksheet should contain the column names TransformerTypeID, PeriodID, ProductID, UnitStorageCost, StorageCapacity, StorageQuantity
A line with the excact values you try to INSERT should not exist. File .\d2.dsn should not contain a line READONLY=TRUE. A bug concerning SQL commands spread over multiple lines has been reported. The fixed coding is included in WinGLPK 4.44.1. http://lists.gnu.org/archive/html/bug-glpk/2010-07/msg00000.html Best regards Xypron -------- Original-Nachricht -------- > Datum: Tue, 20 Jul 2010 08:28:08 -0400 (EDT) > Betreff: Re: [Help-glpk] Problems with Connecting GLPK to Excel > Hi Xypron, > > Thanks a lot for that idea. It worked perfectly. > > Now, the problem I have is for writing values back to Access. The writing > fails, saying that VALUES <1,1,1,1,100,0>" failed. The driver reported the > following diagnostics whilst running SQLExecDirect model.txt:553: error on > writing data to table iq_jpt Model postsolving error. > > The code I use is: > > table iq_jpt {j in TF, p in P, t in T} OUT 'ODBC' > 'FileDSN=.\d2.dsn;READONLY=FALSE' > 'INSERT INTO [TransformerTypeStoragePeriodProducts$]' > '(TransformerTypeID, PeriodID, ProductID,' > 'UnitStorageCost, StorageQuantity, TotalStorage,' > 'StorageCapacity, VariableID)' > 'VALUES(?,?,?,?,?,?);' : > j ~ TransformerTypeID, t ~ PeriodID, p ~ ProductID, hc[j,p,t] ~ > UnitStorageCost, icap_jpt[j,p,t] ~ StorageCapacity, iq[j,p,t] ~ > StorageQuantity; > > > N.B: hc and icap_jpt are parameters (read initially from the same table > successfully), and iq is the variable I am trying to write. Also, note that > the table has 8 columns (3 indices, the 2 parameters, the one variable, and > two extra columns not used in this case). > > I tried erasing the line code of the column names, or modifying it > (including only the indices and used parameters and variable) or trying to > just > write the variable, with no luck!! > > Any help will be highly appreciated! > > Best, > > Aly > > ----- Original Message ----- > From: "glpk xypron" <[email protected]> > To: [email protected] > Cc: [email protected] > Sent: Friday, July 16, 2010 12:48:06 AM GMT -05:00 US/Canada Eastern > Subject: Re: [Help-glpk] Problems with Connecting GLPK to Excel > > Hello Aly, > > GLPK only allows strings up to 100 characters. > > In the current release, SQL statements may be split over multiple strings. > A semicolon at the end of a string marks the end of the statement. Spaces > are automatically inserted between the strings. > > table ta {(i, j) in {i1 in 1..9} cross {i2 in 1..9}} OUT > 'iODBC' 'DSN=glpk;UID=glpk;PWD=gnu' > 'DELETE FROM sudoku_solution' > 'WHERE ID = ' & id & ';' > 'INSERT INTO sudoku_solution' > '(ID, COL, LIN, VAL)' > 'VALUES(?, ?, ?, ?);' : > id ~ ID, i ~ COL, j ~ LIN, (sum{k in 1..9} x[i,j,k] * k) ~ VAL; > > Yesterday a bug was reported in the implementation of multiple string > SQL statements. Please, apply the patch described in > > http://old.nabble.com/bug-in-glpk-4.44-in-glpsql.c-to29176967.html > > The statement you provided could be formatted as: > > table ti IN > 'ODBC' 'DSN=glpk;UID=glpk;PWD=gnu' > 'SELECT' > 'a.OriginFacilityID, d.TransformerTypeID, b.ProductID,' > 'b.PeriodID, b.UnitCost' > 'FROM Channels a' > 'INNER JOIN ChannelPeriodProducts b' > 'ON a.ChannelID = b.ChannelID, Channels a' > 'INNER JOIN Facilities c1' > 'ON a.OriginFacilityID = c1.FacilityID, Channel a' > 'INNER JOIN Facilities c2' > 'ON a.DestinationFacilityID = c2.FacilityID, Facilities c2' > 'INNER JOIN TransformerTypes d' > 'ON c2.FacilityID = d.FacilityID' > 'WHERE (c2.FacilityType = "Transformer")' > 'AND (c1.FacilityType => "Supplier");' : > ... > > Please, check the syntax of your inner joins. > > Best regards > > Xypron > > > -------- Original-Nachricht -------- > > Datum: Thu, 15 Jul 2010 20:40:48 -0400 (EDT) > > CC: [email protected] > > Betreff: Re: [Help-glpk] Problems with Connecting GLPK to Excel > > > Hi Xypron, > > > > Thanks a lot for the excellent support. I sincerely appreciate it. > > > > I tried the SQL idea you told me about. The problem now is that I get > the > > following error: "String Literal Too Long" for the "Where" statement!! > > > > > > My SQL is: > > > > 'SELECT a.OriginFacilityID, a.DestinationFacilityID, b.ProductID, > > b.PeriodID, b.UnitCost, d.TransformationTypeID' > > 'FROM Channels a, ChannelPeriodProducts b, Facilities c, > TransformerTypes > > d' > > 'WHERE a.ChannelID = b.ChannelID AND a.OriginFacilityID = c.FacilityID > AND > > c.FacilityType = "Supplier" AND a.DestinationFacilityID = c.FacilityID > AND > > c.FacilityType = "Transformer" AND a.DestinationFacilityID = > > d.FacilityID': > > > > > > I also tried the following alternative, and got the same error, now for > > the "FROM" statement: > > > > 'SELECT a.OriginFacilityID, d.TransformerTypeID, b.ProductID, > b.PeriodID, > > b.UnitCost ' > > > > 'FROM Channels a INNER JOIN ChannelPeriodProducts b ON a.ChannelID = > > b.ChannelID, Channels a INNER JOIN Facilities c1 ON a.OriginFacilityID = > > c1.FacilityID , Channel a INNER JOIN Facilities c2 ON > a.DestinationFacilityID = > > c2.FacilityID, Facilities c2 INNER JOIN TransformerTypes d ON > c2.FacilityID = > > d.FacilityID ' > > 'WHERE (c2.FacilityType = "Transformer") AND (c1.FacilityType = > > "Supplier")': > > > > Is that error because GLPK can not handle long SQL statements?? And is > > there a way to solve that problem? As I really would like to still have > that > > query in GLPK (I do not want to manually create the table in Access and > then > > call that table in GLPK) > > > > > > Any help will be really appreciated. > > > > Best, > > > > Aly > > -- > GMX DSL: Internet-, Telefon- und Handy-Flat ab 19,99 EUR/mtl. > Bis zu 150 EUR Startguthaben inklusive! http://portal.gmx.net/de/go/dsl > > -- > PhD Student > > Rm. 407 Main Building > H. Milton Stewart School of Industrial and Systems Engineering > Georgia Institute of Technology > 765 Ferst Dr., NW > Atlanta, Georgia 30332-0205, USA > -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
