You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.9 KiB
61 lines
1.9 KiB
kexiImport proposal - piggz (www.piggz.co.uk)
|
|
=============================================
|
|
|
|
This is a proposal for some import functionality for kexi.
|
|
As of this moment i have no idea how it will work, but ive
|
|
been thinking and figured i should get something down in
|
|
writing. Hopefully you will all improve on this and we can
|
|
get something working.
|
|
|
|
The way i see it we need to do a few things:
|
|
|
|
1) A common api to different import systems
|
|
This would be similar in concept to kexidb drivers, but would
|
|
only provide limited, specific functionality
|
|
|
|
2) DB specific classes that provide import functionality
|
|
for postgres, mysql firebird etc...
|
|
|
|
|
|
For 1) we need to to:
|
|
|
|
i) Connect to backend -|
|
|
|
|
|
ii) Get list of databases | All this is already catered for in
|
|
| kexidb
|
|
iii) Get list of tables -|
|
|
|
|
iv) For a given table, get list of columns as stringlist
|
|
|
|
v) For a given table/column combination, get extended information for
|
|
that column:
|
|
|
|
type
|
|
+--If a known kexi type then ok
|
|
+--If unknown then driver may be able to automagically map to suitable type
|
|
+--Ask the user what to do (map to type, convert column, drop column)
|
|
|
|
index (yes/no)
|
|
|
|
pkex (yes/no)
|
|
|
|
default value
|
|
|
|
Alot of this is already catered for in old kexi api, so maybe some
|
|
chunks fo code could be reused, though a bit of a rewrite is inevitable
|
|
to limit the functionality to the above
|
|
|
|
Once the table/column information is available then a tableschema object would be
|
|
created and standard kexidb api could create nescessary structure. For this there
|
|
would be 2 modes of operation
|
|
|
|
A) Structure will be created under new db name, and kexidb api would be used as
|
|
normal
|
|
|
|
B) Structure will be created in existing db. Kexi api would need a mode where
|
|
kexi__* structure is created, but tables are not created as they already exist
|
|
|
|
|
|
Ideas, suggestions and designs welcome :o)
|
|
|
|
PiggZ |