World: r3wp
[SQLite] C library embeddable DB .
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Robert 4-Dec-2008 [779x2] | Yes. |
I did buy the extension. Works very well. | |
Pekr 4-Dec-2008 [781] | Any link? |
Sunanda 4-Dec-2008 [782] | Could you use (say) Truecrypt to host the data files on a encrypted partition? |
Pekr 4-Dec-2008 [783x2] | well, but at some point, you open-up that partition in order to be able to access it. The security is not there anymore. What I would like to have is direct SQLite low-level encryption, so that file might be visible to FS, but still encrypted. And your app provides password or something like that ... IIRC BrianH is using some such solution, I just don't remember its name. |
I am not hesitating to invest some money into it ... | |
Robert 4-Dec-2008 [785x2] | Look on the SQLite homepage under professional support. |
IIRC encryption costs $2000 | |
Pekr 4-Dec-2008 [787] | uff, so much? I expected something sub 500 ;-) |
Ashley 4-Dec-2008 [788] | Robert, I was thinking we can depreciate the /create refinement by making that implict as well ... and the change required to support additional CONNECTs after the first should be as simple as changing the line that reads: all [dbid sql-error "Already connected"] to something like: if all [dbid file? database] [ unless find file %/ [insert file what-dir] sql rejoin ["attach '" ... return ] which then raises the interesting question as to whether we should force database to be file! (so you'd have to attach multiple databases by issuing multiple CONNECTs ... it would certainly simply the CONNECT logic! ;) |
Robert 4-Dec-2008 [789x3] | I see one problem, if the to-be-opened database doesn't exists yet it needs to be created. This can only be done by a call to sqlite3_open and not via the ATTACH sql command. |
And than the returned DB handle has to be used for all actions against this database file. It's much like a file handler. | |
I see two options: 1. We enhance the driver to be able to handle more database handles at the same time. This needs a way to select a database handle as the current one. 2. We make the driver as a prototype object which carries everything for one database handle. Than we need a way how to state which instance to use. | |
amacleod 4-Dec-2008 [792x3] | Banging my head against a wall! This works: SQL reduce [{UPDATE notes SET note=?, up_date=? WHERE book=? AND chapter=? AND section=?} note_text now bk_tit/1 bk_tit/2 bk_tit/3] But this does not: SQL reduce ["Update fdbooks SET up_date=? WHERE ref_number=?" now ref] nor this: SQL reduce [{UPDATE notes SET note=?, up_date=? WHERE book=? AND chapter=? AND section=?} note_text now bk_tit/1 bk_tit/2 bk_tit/3] Any ideas? |
Sorry I mean: nor this: SQL reduce [{UPDATE fdbooks SET bk=?, chap=?, sec_num=?, ftext=?, key_words=?, up_date=? WHERE ref_number=?} blk/2 blk/3 blk/4 blk/5 blk/6 (to-date blk/7) blk/1] | |
I found part of the problem... If I'm updating multiple records it fails to update but if update one record it updates. I'm using a transaction here. do I need to place each var in ()? | |
Pekr 4-Dec-2008 [795] | which version of sqlite dll are you using? there was one bug with update, which I reported one year ago, which even corrupted data. They fixed it thought in next version. So hopefully this is not your case ... |
amacleod 4-Dec-2008 [796x3] | Found it! I had my 'begin' of my transaction inside the loop. dope! |
Thanks Pekr. | |
That's what happens when you work in hte middle of the night. | |
GiuseppeC 14-Dec-2008 [799x3] | Hello, I am experimenting with SQLite and I have a question: How do I store a web page retrieved with READ onto a SQLite field ? |
Forget it, just found the solution. My fear was all about string handling but everything seems going well. | |
It seems to work even with block of lines | |
Ashley 14-Dec-2008 [802] | Yep, by default the driver molds and loads REBOL values. Use /direct if you don't want this behaviour. |
amacleod 17-Dec-2008 [803x3] | how do you search for a string within a column. Is that what they refer to as full text search? (fts) |
does sqlite.r support these fts tables? | |
Let me first make sure i need fts... I want to find a sub-string within a larger string: for example: find the the rows that contain word "table" in a column called f_text one row of which might contain "When inserting into an fts table, if no docid is provided," This would be a hit since table is contained in the string. | |
sqlab 18-Dec-2008 [806] | like is your friend |
amacleod 18-Dec-2008 [807] | syntax? |
Robert 18-Dec-2008 [808] | See SQLite homepage. It's something like this: LIKE '%...%' |
Chris 18-Dec-2008 [809] | Begins with is LIKE '...%' Anywhere is LIKE '%...%' End is LIKE '%...' Rebol filenames: LIKE '%.r' |
sqlab 18-Dec-2008 [810] | select * from table where f_text like '%table%' but the wildcards may vary according the database |
[unknown: 5] 18-Dec-2008 [811] | Amacleod - http://www.w3schools.com/sql/sql_like.asp |
amacleod 18-Dec-2008 [812] | Thanks, I try it out in the morning. I googled but could not find it. I've had trouble finding a good source of docs for sqlite before. w3schools looks good. Thanks again all! |
GiuseppeC 19-Dec-2008 [813x2] | Amacleod: if you search for ANSI 92 you should be able to find for the complete specification. |
This also brings me a question: what about SQLite and UNICODE ? | |
amacleod 21-Dec-2008 [815x4] | I got the 'like' command working with a text string but I can not fiqure out how to use variables... something like: rslts: sql reduce [{SELECT * FROM books WHERE ftext LIKE '%?%' } var] |
This works: rslts: sql reduce [{SELECT * FROM books WHERE ftext LIKE '%string%' } ] | |
SQL reduce [{INSERT INTO table VALUES (?, ?, ?)} fname lname phone] | |
Ignore that last message...Sorry | |
Graham 22-Dec-2008 [819] | you have to create your dialected string first |
sqlab 22-Dec-2008 [820] | A concatenation like like '%' || ? || '%' shoud work |
PeterWood 22-Dec-2008 [821] | I got this unexpected behaviour: >> do %~/Code/Library/Rebol/sqlite.r Script: "SQLite driver" (26-Nov-2008) >> connect %~/Code/SQLite3/mydata.db ** User Error: SQLite out of memory ** Near: make error! reform ["SQLite" error] >> change-dir %~/Code/SQLite3 == %/Users/peter/Code/SQLite3 / >> connect %mydata.db == 3400768 |
amacleod 22-Dec-2008 [822x7] | sqlab, reslts: sql reduce [{select * from fdbooks where ftext like '%'||?||'%'} srch] == [] where srch: "ladders" no error but not finding what should be there.: reslts: sql reduce [{select * from fdbooks where ftext like '%ladders%'}] == [[2 "FFP-LADDERS" "1-PORTABLE LADDERS" "2." " SIZES AND TYPES OF PORTABLE LADDERS IN USE^/" "" 4-Dec-2008/15:29:1 9] [4 "FFP-LADD... |
I got it! it works when srch: 'ladders | |
as word? | |
Not string? | |
What if I want multi-word string? as in; reslts: sql reduce [{select * from fdbooks where ftext like '%aluminum ladders%'}] == [[9 "FFP-LADDERS" "1-PORTABLE LADDERS" "3." " CONSTRUCTION OF PORTABLE ALUMINUM LADDERS^/" "" 4-Dec-2008/15:29:19 ] [10 "FFP-LADD... | |
and while we are here... what about multiple words in string... ladders and "aluminum" as apposed to "aluminum ladders" | |
And how could I figure this out myself. Is this syntax a part of the sqlite.r interface or sqlite itself? | |
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