Paul,
Have you tried forcing a Commit on the SQLite data. That may help
Dave
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-----Original Message-----
From: ProFox [mailto:[email protected]] On Behalf Of Paul H. Tarver
Sent: 16 November 2017 04:58
To: [email protected]
Subject: RE: SQLite Problem - DSN-less Connection Doesn't Create A File
New details.
I rebooted my computer and tried to use SQLSTRINGCONNECT again and this time, a
window opened which is the same window you would see if you try to create a
DSN. So I have no idea why I got a valid handle no matter what I tried earlier
because after the reboot, nothing I try will give me anything other than the
SQLite3 ODBC Driver Connect window.
I simplified the connection string command to this:
liH = SQLSTRINGCONNECT("DRIVER={SQLite3 ODBC
Driver};DBNAME=T:\f1;SyncPragma=NORMAL;Timeout=100000;")
Executing this line immediately opens the SQLite3 ODBC Driver Connect window.
The Data Source Name is blank and the Database Name is blank. The timeout and
the Synch Mode fields are populated with 100000 and NORMAL but I have no idea
if those are defaults or coming from the connection string.
If it helps, I'm using the 32-bit ODBC driver on a 64-bit Windows 7 development
box.
PS: T:\ is a valid volume and I have also tried c:\temp\f1.
Paul H. Tarver
Email: [email protected]
-----Original Message-----
From: ProfoxTech [mailto:[email protected]] On Behalf Of Paul H.
Tarver
Sent: Wednesday, November 15, 2017 6:14 PM
To: [email protected]
Subject: SQLite Problem - DSN-less Connection Doesn't Create A File
Ok, I give up. I've been using Whil Hentzen's book "Using SQLite to Bypass The
2GB .DBF Filesize Limit" for a project I'm trying to develop and I have some
weird behavior going on.
I'm trying to use SQLite3 to deal with an import file that will have 350+
columns. I've been using the the examples and doing everything via the
SQLite3.exe command prompt works as documented. I've also worked out a SQL
script using SQLite Expert to drop a table if it exists, create an empty table
and the corresponding indexes. Up to this point everything worked as expected.
However, now I'm trying to migrate this code into VFP9 using SQL Pass-Through,
but here's what I'm running into:
If I create a DSN using the ODBC drive and then use SQLCONNECT('dsn-name'), the
connection is made and if the database file "trnslate.db" doesn't already exist
it is created in the folder I designated in the Database Name field of the DSN.
However, if I create DSN-Less connection (SQLSTRINGCONNECT) using the
connection string I get back using SQLGETPROP(lnhandle,"ConnectString") , I get
a handle, but it is to a "trnslate.db" database that doesn't contain the table
I previously created and if the "trnslate.db" table doesn't already exist in
the designated folder, it is NOT created on the hard drive.
However, it apparently IS created in memory. I can create a table and issue a
select command and get back the results I expect, but a database file is NEVER
physically created on the hard drive which I need to do for my purposes.
Here is some sample code to see if you can tell me where I'm going wrong:
liH = SQLSTRINGCONNECT( "DRIVER=SQLite3 ODBC Driver;" + ;
"DBNAME=T:\trnslate.db;" + ;
"PWD=;" + ;
"StepAPI=0;" + ;
"SyncPragma=;" + ;
"NoTXN=0;" + ;
"Timeout=;" + ;
"ShortNames=0;" + ;
"LongNames=0;" + ;
"NoCreat=0;" + ;
"NoWCHAR=0;" + ;
"FKSupport=0;" + ;
"JournalMode=;" + ;
"OEMCP=0;" + ;
"BigInt=0;" + ;
"JDConv=0;" + ;
"TraceFile=;")
SQLExec(m.liH, "create table EmplImport (id int primary key, dummy
varchar(50));")
SQLExec(m.liH, "insert into EmplImport (id, dummy) values (1,'testing');")
SQLExec(m.liH, "select * from EmplImport;",'dbtest')
SQLDISCONNECT(liH)
I've tried this process about hundred differ ways with different combinations
of paired keys in the connection string without success. I've used a DSN-less
connection program that I wrote which works perfectly with SQL, MySQL and
others and though I never fail to get a handle; the database file never
physically exists in any path on the hard drive. Complete searches of my hard
drive for the database name yield no results
The code above gives me a value for m.liH which is greater than zero, I never
get errors thrown, I always get a valid handle, the table can be created, the
data inserted and I get a cursor back from the select named 'dbtest' with the
exact data inserted on the previous line.
I've been on this for about six hours and I'm no closer to making this work as
a DSN-less project even though Whil seemed to imply in the book that this was
his preferred method of doing things.
HELP!
Paul H. Tarver
Email: <mailto:[email protected]> [email protected]
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