Mercurial > sqlpython
comparison docs/source/design.rst @ 476:4bd3145bff1b
begin design notes
| author | cat@eee |
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| date | Thu, 11 Mar 2010 16:11:42 -0500 |
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| 475:8937b1476c42 | 476:4bd3145bff1b |
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| 1 ============ | |
| 2 Design Notes | |
| 3 ============ | |
| 4 | |
| 5 These design notes will hopefully not be necessary for routine use | |
| 6 of sqlpython; they describe implementation details intended to be | |
| 7 transparent to the user. However, if you get involved in developing | |
| 8 or debugging - or if something goes wrong (which it sometimes will) - | |
| 9 this information may be of interest. | |
| 10 | |
| 11 Pickled metadata | |
| 12 ---------------- | |
| 13 | |
| 14 sqlpython relies on Gerald to collect metadata, and this collection | |
| 15 takes some time. When a database connection is made, a Gerald | |
| 16 connection is initiated; to provide preliminary metadata before that | |
| 17 Gerald collection is complete, sqlpython looks for a picklefile | |
| 18 storing metadata collected during an earlier session. When the fresh | |
| 19 metadata collection is complete, it is stored in pickled form for the | |
| 20 next session. | |
| 21 | |
| 22 | |
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| 24 |