Re: [sqlite] possible ordering issue since 3.7.15

Thank you for clarification. I'll forward this to the original reporter and add a note about this to our library. Regards, Kenichi Ishigaki 2013/4/14 Jay A. Kreibich : > On Sat, Apr 13, 2013 at 11:25:41PM +0700, Dan Kennedy scratched on the wall: >> On 04/13/2013 11:22 PM,

Re: [sqlite] Help speed up query

SQLite was much slower on many queries AFTER analyze was executed. here are the referenced tables, # of rows, primary key, and additional indexes: Objects = 5495 rows, Primary key=Object_ID, other indexes on Address_ID, Dimension_ID, DisplayFormat_ID, Limit_ID, and Object_ID; DTC_Statuses = 5234

Re: [sqlite] Help speed up query

On 15 Apr 2013, at 9:47pm, ven...@intouchmi.com wrote: > The integrity check came back with OK. Good. > My software was not locked up totally. It did finally come back. For some > reason executing analyze slow other queries way down. I am surprised by anyone reporting that ANALYZE has

Re: [sqlite] Help speed up query

I corrected the "DTC" to 'DTC' and undid the analyze since that seemed to be slowing things down quite a bit. Unfortunately, the speed did not improve. Here is the latest explain query plan: 0|0|6|SEARCH TABLE Object_Types USING COVERING INDEX sqlite_autoindex_Object_Types_1 (Object_Type=?)

Re: [sqlite] Help speed up query

The integrity check came back with OK. My software was not locked up totally. It did finally come back. For some reason executing analyze slow other queries way down. Here is the new explain query plan: 0|0|6|SEARCH TABLE Object_Types USING COVERING INDEX sqlite_autoindex_Object_Types_1

Re: [sqlite] Help speed up query

On 15 Apr 2013, at 9:40pm, Igor Tandetnik wrote: > On 4/15/2013 4:31 PM, Simon Slavin wrote: >> I also note this: >> >>> WHERE ((([Object_Types].[Object_Type])="DTC")) >> >> This is technically incorrect. It should use single quotes around DTC, not >> double quotes. > >

Re: [sqlite] Help speed up query

On 4/15/2013 4:31 PM, Simon Slavin wrote: I also note this: WHERE ((([Object_Types].[Object_Type])="DTC")) This is technically incorrect. It should use single quotes around DTC, not double quotes. Actually - does any of the tables participating in the statement have a column named DTC,

Re: [sqlite] Help speed up query

On 15 Apr 2013, at 9:22pm, ven...@intouchmi.com wrote: > This is the create index statement: > CREATE INDEX IF NOT EXISTS > "DTC_Statuses_1_index" ON > "DTC_Statuses" ("Object_ID"); > > For some reason, when I execute analyze, my software locks up somewhere > when running its test queries.

Re: [sqlite] Help speed up query

On Mon, Apr 15, 2013 at 10:04 PM, Dominique Devienne wrote: > On Mon, Apr 15, 2013 at 9:45 PM, wrote: > >> Igor, >> >> As a follow up, I added the other two indexes with no real inprovement. >> Here is the new explain query plan: >> 0|0|6|SEARCH TABLE

Re: [sqlite] Help speed up query

This is the create index statement: CREATE INDEX IF NOT EXISTS "DTC_Statuses_1_index" ON "DTC_Statuses" ("Object_ID"); For some reason, when I execute analyze, my software locks up somewhere when running its test queries. I'll delve further into this. Vance on Apr 15, 2013, Igor Tandetnik

Re: [sqlite] Help speed up query

Are you sure? The query plan looks like Objects(Object_Type_ID) was added but DTC_Statuses(Object_ID) was not. Igor Tandetnik On 4/15/2013 3:57 PM, ven...@intouchmi.com wrote: DTC_Statuses(Object_ID) and Objects(Object_Type_ID) Vance on Apr 15, 2013, Igor Tandetnik

Re: [sqlite] Help speed up query

On Mon, Apr 15, 2013 at 9:45 PM, wrote: > Igor, > > As a follow up, I added the other two indexes with no real inprovement. > Here is the new explain query plan: > 0|0|6|SEARCH TABLE Object_Types USING COVERING INDEX > sqlite_autoindex_Object_Types_1 (Object_Type=?) (~1

Re: [sqlite] Help speed up query

DTC_Statuses(Object_ID) and Objects(Object_Type_ID) Vance on Apr 15, 2013, Igor Tandetnik wrote: > >On 4/15/2013 3:45 PM, ven...@intouchmi.com wrote: >> As a follow up, I added the other two indexes with no real inprovement. > >Which two indexes? >-- >Igor Tandetnik >

Re: [sqlite] Help speed up query

On 4/15/2013 3:45 PM, ven...@intouchmi.com wrote: As a follow up, I added the other two indexes with no real inprovement. Which two indexes? -- Igor Tandetnik ___ sqlite-users mailing list sqlite-users@sqlite.org

Re: [sqlite] Help speed up query

On 4/15/2013 3:27 PM, ven...@intouchmi.com wrote: Here is the result of the explain query plan: 0|0|1|SCAN TABLE DTC_Statuses (~100 rows) 0|1|0|SEARCH TABLE Objects USING INTEGER PRIMARY KEY (rowid=?) (~1 rows) 0|2|6|SEARCH TABLE Object_Types USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)

Re: [sqlite] Help speed up query

Igor, As a follow up, I added the other two indexes with no real inprovement. Here is the new explain query plan: 0|0|6|SEARCH TABLE Object_Types USING COVERING INDEX sqlite_autoindex_Object_Types_1 (Object_Type=?) (~1 rows) 0|1|1|SCAN TABLE DTC_Statuses (~100 rows) 0|2|0|SEARCH TABLE

Re: [sqlite] Help speed up query

Thanks Igor! I did create indexes for the SQLite DB version based on the indexes in the MS Access DB. Object_Texttables does have an index on Object_ID and Object_Transactions also has an index on - Object_ID. Just to double check, my index declarations are: CREATE INDEX IF NOT EXISTS

Re: [sqlite] Help speed up query

Do you have appropriate indexes on the tables. See: http://stackoverflow.com/questions/1676448/using-sqlite-how-do-i-index-colum ns-in-a-create-table-statement -Original Message- From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org] On Behalf Of

Re: [sqlite] Help speed up query

On 4/15/2013 2:20 PM, ven...@intouchmi.com wrote: here is the output from explain: I asked about EXPLAIN QUERY PLAN, not EXPLAIN. -- Igor Tandetnik ___ sqlite-users mailing list sqlite-users@sqlite.org

Re: [sqlite] Help speed up query

On 4/15/2013 2:12 PM, ven...@intouchmi.com wrote: That's odd, I had listed the tables and keys in the original message. Here is that section again: which generates about 16000 rows. The row counts and primary keys for the referenced tables are: Objects = 5495, Object_ID; DTC_Statuses = 5234,

Re: [sqlite] Help speed up query

here is the output from explain: 0|Trace|0|0|0||00| 1|String8|0|1|0|DTC|00| 2|Goto|0|80|0||00| 3|OpenRead|1|17|0|8|00| 4|OpenRead|0|1027|0|10|00| 5|OpenRead|6|1025|0|2|00| 6|OpenRead|7|16|0|2|00| 7|OpenRead|2|170|0|4|00| 8|OpenRead|8|171|0|keyinfo(1,BINARY)|00| 9|OpenRead|3|731|0|6|00|

Re: [sqlite] Help speed up query

That's odd, I had listed the tables and keys in the original message. Here is that section again: which generates about 16000 rows. The row counts and primary keys for the referenced tables are: Objects = 5495, Object_ID; DTC_Statuses = 5234, DTC_Status_ID; Object_TextTables = 15718,

Re: [sqlite] Help speed up query

On 4/15/2013 1:07 PM, ven...@intouchmi.com wrote: I've been trying to convince my boss that SQLite should be faster than MS Access. I wrote a conversion program that reads a Access DB and generates an SQL statement files and then sends the table creation and insert statements to SQLite. I

[sqlite] Help speed up query

Hi, I've been trying to convince my boss that SQLite should be faster than MS Access. I wrote a conversion program that reads a Access DB and generates an SQL statement files and then sends the table creation and insert statements to SQLite. I also wrote a C++ wrapper that I can call from VB6