On 15 Mar 2019, at 7:35am, niklas <[email protected]> wrote:
> Dropping analyze (sqlite_stat1) information from the database made
> the problem go away, i.e. made sqlite use index instead of scanning.
Instead of dropping ANALYZE information, did you try updating it instead, by
running ANALYZE again ?
Ah ...
> ANALYZE;
> INSERT INTO sqlite_stat1 VALUES('BookGenres','BookGenres','3190 2 1');
How do we know your values for sqlite_stat1 are right ? Why aren't you just
leaving ANALZE to do its job ?
Also, you are missing out on part of what ANALYZE does. As well as looking at
your schema, ANALYZE also considers the 'chunkiness' of the data in each
indexed column. Run it with data in the table, with the data as convincing as
possible in terms of number of rows and the values in each column.
In your create.txt I would insert data in your tables, then put ANALYZE just
before COMMIT.
Curious to know if this improves matters for you. I'm not certain.
Simon.
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