| Subject | Fw: JPEG Images and BLOBS |
|---|---|
| Author | peter.fabian@lafarge-za.lafarge.com |
| Post date | 2009-09-28T05:38:10Z |
Good Day,
I have recently started using Firebird with REALBasic (V2008 R5, on
Windows XP) - connecting through Firebird ODBC, I'm using Superserver
version 2.1.2, dialect 3.
I am trying to store and retrieve JPEG images in BLOB fields, without much
success.
Whilst doing this in REAL (using SQLite) databases in the past presented
no difficulties, I can't get it to work in Firebird. Having read Ms
Borrie's "The Firebird Book" - all thousand pages of it - I'm no wiser.
She puts lots of effort into describing the use of BLOB Subtype 1 fields
to store large blocks of text, but, unfortunately, virtually none on using
BLOB Subtype 0 fields, for storing images or other binary data.
What I need is some simple guidelines on how to store and retrieve JPEGs
in Firebird.
Storing the image, as I understand it, is straightforward, same as any
other data with 'Insert'. However, the image is stored 'elsewhere' and an
ID is generated, as a pointer, but I'm not clear on where that pointer is
put in the record. I have several other fields in the record, such as the
picture title and subject - presumably I must make a provision for the
BLOB ID (what data type would that be?).
Retrieving that image is a mystery to me. It seems to be a 2 step process,
getting the ID and then using that ID to get the actual image back into an
RB Picture variable. I don't understand either step!
Can anyone assist ?
Regards
Peter FABIAN | Plant System Controller | Sunninghill | Lafarge Industries
South Africa
Office: 011 253-4600 | Direct: 011 253-4631 | Fax: 011 253-4643 | Mobile:
083 656-9202
Email: peter.fabian@... | Web: http://www.lafarge.co.za
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[Non-text portions of this message have been removed]
I have recently started using Firebird with REALBasic (V2008 R5, on
Windows XP) - connecting through Firebird ODBC, I'm using Superserver
version 2.1.2, dialect 3.
I am trying to store and retrieve JPEG images in BLOB fields, without much
success.
Whilst doing this in REAL (using SQLite) databases in the past presented
no difficulties, I can't get it to work in Firebird. Having read Ms
Borrie's "The Firebird Book" - all thousand pages of it - I'm no wiser.
She puts lots of effort into describing the use of BLOB Subtype 1 fields
to store large blocks of text, but, unfortunately, virtually none on using
BLOB Subtype 0 fields, for storing images or other binary data.
What I need is some simple guidelines on how to store and retrieve JPEGs
in Firebird.
Storing the image, as I understand it, is straightforward, same as any
other data with 'Insert'. However, the image is stored 'elsewhere' and an
ID is generated, as a pointer, but I'm not clear on where that pointer is
put in the record. I have several other fields in the record, such as the
picture title and subject - presumably I must make a provision for the
BLOB ID (what data type would that be?).
Retrieving that image is a mystery to me. It seems to be a 2 step process,
getting the ID and then using that ID to get the actual image back into an
RB Picture variable. I don't understand either step!
Can anyone assist ?
Regards
Peter FABIAN | Plant System Controller | Sunninghill | Lafarge Industries
South Africa
Office: 011 253-4600 | Direct: 011 253-4631 | Fax: 011 253-4643 | Mobile:
083 656-9202
Email: peter.fabian@... | Web: http://www.lafarge.co.za
"This e-mail is confidential and may contain legally privileged information.
If you are not the intended recipient, you should not copy, distribute, disclose or use the information it contains.
Please e-mail the sender immediately and delete this message from your system.
E-mails are susceptible to corruption, interception and unauthorised amendment; we do not accept liability for any such changes, or for their consequences.
You should be aware, that the company may monitor your emails and their content"
[Non-text portions of this message have been removed]