html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app https://github.com/simonw/sqlite-utils/issues/381#issuecomment-1010462035,https://api.github.com/repos/simonw/sqlite-utils/issues/381,1010462035,IC_kwDOCGYnMM48Om1T,9599,2022-01-11T23:33:37Z,2022-01-11T23:33:37Z,OWNER,Documentation: https://sqlite-utils.datasette.io/en/latest/cli.html#returning-all-rows-in-a-table,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099584685, https://github.com/simonw/sqlite-utils/issues/382#issuecomment-1010461844,https://api.github.com/repos/simonw/sqlite-utils/issues/382,1010461844,IC_kwDOCGYnMM48OmyU,9599,2022-01-11T23:33:14Z,2022-01-11T23:33:14Z,OWNER,Documentation: https://sqlite-utils.datasette.io/en/latest/cli.html#returning-all-rows-in-a-table,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099585611, https://github.com/simonw/sqlite-utils/issues/381#issuecomment-1010441118,https://api.github.com/repos/simonw/sqlite-utils/issues/381,1010441118,IC_kwDOCGYnMM48Ohue,9599,2022-01-11T22:56:53Z,2022-01-11T22:57:09Z,OWNER,"`sqlite-utils search` has `--limit` already: https://sqlite-utils.datasette.io/en/latest/cli-reference.html#search ``` --limit INTEGER Number of rows to return - defaults to everything ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099584685, https://github.com/simonw/sqlite-utils/issues/383#issuecomment-1010440166,https://api.github.com/repos/simonw/sqlite-utils/issues/383,1010440166,IC_kwDOCGYnMM48Ohfm,9599,2022-01-11T22:55:05Z,2022-01-11T22:55:05Z,OWNER,Twitter thread about this: https://twitter.com/simonw/status/1481020195074293761,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099586786, https://github.com/simonw/sqlite-utils/issues/383#issuecomment-1010387223,https://api.github.com/repos/simonw/sqlite-utils/issues/383,1010387223,IC_kwDOCGYnMM48OUkX,9599,2022-01-11T21:45:32Z,2022-01-11T21:45:32Z,OWNER,The new page of documentation: https://sqlite-utils.datasette.io/en/latest/cli-reference.html,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099586786, https://github.com/simonw/sqlite-utils/issues/383#issuecomment-1010386802,https://api.github.com/repos/simonw/sqlite-utils/issues/383,1010386802,IC_kwDOCGYnMM48OUdy,9599,2022-01-11T21:44:53Z,2022-01-11T21:44:53Z,OWNER,Here's the `cog` code I used: https://github.com/simonw/sqlite-utils/blob/1d44b0cc2784c94aed1bcf350225cd86ee1aa7e5/docs/cli-reference.rst#L11-L76,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099586786, https://github.com/simonw/sqlite-utils/issues/383#issuecomment-1010333511,https://api.github.com/repos/simonw/sqlite-utils/issues/383,1010333511,IC_kwDOCGYnMM48OHdH,9599,2022-01-11T20:27:08Z,2022-01-11T20:27:08Z,OWNER,"I'll call the new page ""CLI reference"", for consistency with the API reference page here: https://sqlite-utils.datasette.io/en/stable/reference.html","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1099586786, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1009548580,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1009548580,IC_kwDOCGYnMM48LH0k,536941,2022-01-11T02:43:34Z,2022-01-11T02:43:34Z,CONTRIBUTOR,thanks so much! always a pleasure to see how you work through these things,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/380#issuecomment-1009544785,https://api.github.com/repos/simonw/sqlite-utils/issues/380,1009544785,IC_kwDOCGYnMM48LG5R,9599,2022-01-11T02:32:56Z,2022-01-11T02:32:56Z,OWNER,"CLI and Python library improvements to help run [ANALYZE](https://www.sqlite.org/lang_analyze.html) after creating indexes or inserting rows, to gain better performance from the SQLite query planner when it runs against indexes. Three new CLI commands: `create-database`, `analyze` and `bulk`. - New `sqlite-utils create-database` command for creating new empty database files. ([#348](https://github.com/simonw/sqlite-utils/issues/348)) - New Python methods for running `ANALYZE` against a database, table or index: `db.analyze()` and `table.analyze()`, see [Optimizing index usage with ANALYZE](https://sqlite-utils.datasette.io/en/stable/python-api.html#python-api-analyze). ([#366](https://github.com/simonw/sqlite-utils/issues/366)) - New [sqlite-utils analyze command](https://sqlite-utils.datasette.io/en/stable/cli.html#cli-analyze) for running `ANALYZE` using the CLI. ([#379](https://github.com/simonw/sqlite-utils/issues/379)) - The `create-index`, `insert` and `update` commands now have a new `--analyze` option for running `ANALYZE` after the command has completed. ([#379](https://github.com/simonw/sqlite-utils/issues/379)) - New [sqlite-utils bulk command](https://sqlite-utils.datasette.io/en/stable/cli.html#cli-bulk) which can import records in the same way as `sqlite-utils insert` (from JSON, CSV or TSV) and use them to bulk execute a parametrized SQL query. ([#375](https://github.com/simonw/sqlite-utils/issues/375)) - The CLI tool can now also be run using `python -m sqlite_utils`. ([#368](https://github.com/simonw/sqlite-utils/issues/368)) - Using `--fmt` now implies `--table`, so you don't need to pass both options. ([#374](https://github.com/simonw/sqlite-utils/issues/374)) - The `--convert` function applied to rows can now modify the row in place. ([#371](https://github.com/simonw/sqlite-utils/issues/371)) - The [insert-files command](https://sqlite-utils.datasette.io/en/stable/cli.html#cli-insert-files) supports two new columns: `stem` and `suffix`. ([#372](https://github.com/simonw/sqlite-utils/issues/372)) - The `--nl` import option now ignores blank lines in the input. ([#376](https://github.com/simonw/sqlite-utils/issues/376)) - Fixed bug where streaming input to the `insert` command with `--batch-size 1` would appear to only commit after several rows had been ingested, due to unnecessary input buffering. ([#364](https://github.com/simonw/sqlite-utils/issues/364))","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1098574572, https://github.com/simonw/sqlite-utils/issues/375#issuecomment-1009536276,https://api.github.com/repos/simonw/sqlite-utils/issues/375,1009536276,IC_kwDOCGYnMM48LE0U,9599,2022-01-11T02:12:58Z,2022-01-11T02:12:58Z,OWNER,Documentation: https://sqlite-utils.datasette.io/en/latest/cli.html#executing-sql-in-bulk,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097251014, https://github.com/simonw/sqlite-utils/pull/377#issuecomment-1009534817,https://api.github.com/repos/simonw/sqlite-utils/issues/377,1009534817,IC_kwDOCGYnMM48LEdh,9599,2022-01-11T02:09:38Z,2022-01-11T02:09:38Z,OWNER,"I tested this like so: ``` % wget 'https://raw.githubusercontent.com/wri/global-power-plant-database/master/output_database/global_power_plant_database.csv' % sqlite-utils create-database test.db % sqlite-utils create-table test.db power_plants url text owner text % sqlite-utils schema test.db CREATE TABLE [power_plants] ( [url] TEXT, [owner] TEXT ); % sqlite-utils bulk test.db 'insert into power_plants (url, owner) values (:url, :owner)' global_power_plant_database.csv --csv [------------------------------------] 0% [###################################-] 99% % sqlite-utils tables --counts test.db -t table count ------------ ------- power_plants 33643 ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097477582, https://github.com/simonw/sqlite-utils/pull/377#issuecomment-1009532125,https://api.github.com/repos/simonw/sqlite-utils/issues/377,1009532125,IC_kwDOCGYnMM48LDzd,9599,2022-01-11T02:03:35Z,2022-01-11T02:03:35Z,OWNER,Documentation: https://github.com/simonw/sqlite-utils/blob/f4ea0d32c0543373eefaa9b9f3911eb07549eecb/docs/cli.rst#executing-sql-in-bulk,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097477582, https://github.com/simonw/sqlite-utils/pull/377#issuecomment-1009531863,https://api.github.com/repos/simonw/sqlite-utils/issues/377,1009531863,IC_kwDOCGYnMM48LDvX,22429695,2022-01-11T02:03:00Z,2022-01-11T02:03:00Z,NONE,"# [Codecov](https://codecov.io/gh/simonw/sqlite-utils/pull/377?src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) Report > Merging [#377](https://codecov.io/gh/simonw/sqlite-utils/pull/377?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (f4ea0d3) into [main](https://codecov.io/gh/simonw/sqlite-utils/commit/b6dad08a8389736b7e960cfe9bc719cfc21a98f5?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (b6dad08) will **decrease** coverage by `0.01%`. > The diff coverage is `96.00%`. 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Last update [b6dad08...f4ea0d3](https://codecov.io/gh/simonw/sqlite-utils/pull/377?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097477582, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1009521921,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1009521921,IC_kwDOCGYnMM48LBUB,9599,2022-01-11T01:37:53Z,2022-01-11T01:37:53Z,OWNER,"I decided to go with making this opt-in, mainly for consistency with the other places where I added this feature - see: - #379 - #366 You can now run the following: sqlite-utils create-index mydb.db mytable mycolumn --analyze And ``ANALYZE`` will be run on the index once it has been created.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1009508865,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1009508865,IC_kwDOCGYnMM48K-IB,9599,2022-01-11T01:08:51Z,2022-01-11T01:08:51Z,OWNER,"The Python methods are all done now, next step is the CLI options. I'll do those in a separate issue.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1009288898,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1009288898,IC_kwDOCGYnMM48KIbC,9599,2022-01-10T19:54:04Z,2022-01-10T19:54:04Z,OWNER,"Having browsed the API reference I think the methods that would benefit from an `analyze=True` parameter are: - `db.create_index` - `table.insert_all` - `table.upsert_all` - `table.delete_where`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1009285627,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1009285627,IC_kwDOCGYnMM48KHn7,9599,2022-01-10T19:49:19Z,2022-01-10T19:51:25Z,OWNER,Documentation for those two new methods: https://sqlite-utils.datasette.io/en/latest/python-api.html#optimizing-index-usage-with-analyze,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1009286373,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1009286373,IC_kwDOCGYnMM48KHzl,9599,2022-01-10T19:50:22Z,2022-01-10T19:50:22Z,OWNER,"With respect to #365, I'm now thinking that having the ability to say ""... and then run ANALYZE"" could be useful for a bunch of Python methods. For example: ```python db[""dogs""].insert_all(list_of_dogs, analyze=True) db[""dogs""].create_index([""name""], analyze=True) ``` ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1009273525,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1009273525,IC_kwDOCGYnMM48KEq1,9599,2022-01-10T19:32:39Z,2022-01-10T19:32:39Z,OWNER,"I'm going to implement the Python library methods based on the prototype: ```diff commit 650f97a08f29a688c530e5f6c9eedc9269ed7bdc Author: Simon Willison Date: Sat Jan 8 13:34:01 2022 -0800 Initial prototype of .analyze(), refs #366 diff --git a/sqlite_utils/db.py b/sqlite_utils/db.py index dfc4723..1348b4a 100644 --- a/sqlite_utils/db.py +++ b/sqlite_utils/db.py @@ -923,6 +923,13 @@ class Database: ""Run a SQLite ``VACUUM`` against the database."" self.execute(""VACUUM;"") + def analyze(self, name=None): + ""Run ``ANALYZE`` against the entire database or a named table or index."" + sql = ""ANALYZE"" + if name is not None: + sql += "" [{}]"".format(name) + self.execute(sql) + class Queryable: def exists(self) -> bool: @@ -2902,6 +2909,10 @@ class Table(Queryable): ) return self + def analyze(self): + ""Run ANALYZE against this table"" + self.db.analyze(self.name) + def analyze_column( self, column: str, common_limit: int = 10, value_truncate=None, total_rows=None ) -> ""ColumnDetails"": ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/pull/367#issuecomment-1009272446,https://api.github.com/repos/simonw/sqlite-utils/issues/367,1009272446,IC_kwDOCGYnMM48KEZ-,9599,2022-01-10T19:31:08Z,2022-01-10T19:31:08Z,OWNER,I'm going to implement this in a separate commit from this PR.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097041471, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008557414,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008557414,IC_kwDOCGYnMM48HV1m,9599,2022-01-10T05:36:19Z,2022-01-10T05:36:19Z,OWNER,That did the trick.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/375#issuecomment-1008556706,https://api.github.com/repos/simonw/sqlite-utils/issues/375,1008556706,IC_kwDOCGYnMM48HVqi,9599,2022-01-10T05:33:41Z,2022-01-10T05:33:41Z,OWNER,"I tested the prototype like this: sqlite-utils blah.db 'create table blah (id integer primary key, name text)' echo 'id,name 1,Cleo 2,Chicken' > blah.csv sqlite-utils bulk blah.db 'insert into blah (id, name) values (:id, :name)' blah.csv --csv ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097251014, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008546573,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008546573,IC_kwDOCGYnMM48HTMN,9599,2022-01-10T05:05:15Z,2022-01-10T05:05:15Z,OWNER,"Bit nasty but it might work: ```python def try_until(expected): tries = 0 while True: rows = list(Database(db_path)[""rows""].rows) if rows == expected: return tries += 1 if tries > 10: assert False, ""Expected {}, got {}"".format(expected, rows) time.sleep(tries * 0.1) try_until([{""name"": ""Azi""}]) proc.stdin.write(b'{""name"": ""Suna""}\n') proc.stdin.flush() try_until([{""name"": ""Azi""}, {""name"": ""Suna""}]) ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008545140,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008545140,IC_kwDOCGYnMM48HS10,9599,2022-01-10T05:01:34Z,2022-01-10T05:01:34Z,OWNER,"Urgh, tests are still failing intermittently - for example: ``` time.sleep(0.4) > assert list(Database(db_path)[""rows""].rows) == [{""name"": ""Azi""}] E AssertionError: assert [] == [{'name': 'Azi'}] E Right contains one more item: {'name': 'Azi'} E Full diff: E - [{'name': 'Azi'}] E + [] ``` I'm going to change this code to keep on trying up to 10 seconds - that should get the tests to pass faster on most machines.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008537194,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008537194,IC_kwDOCGYnMM48HQ5q,9599,2022-01-10T04:29:53Z,2022-01-10T04:31:29Z,OWNER,"After a bunch of debugging with `print()` statements it's clear that the problem isn't with when things are committed or the size of the batches - it's that the data sent to standard input is all being processed in one go, not a line at a time. I think that's because it is being buffered by this: https://github.com/simonw/sqlite-utils/blob/d2a79d200f9071a86027365fa2a576865b71064f/sqlite_utils/cli.py#L759-L770 The buffering is there so that we can sniff the first few bytes to detect if it's a CSV file - added in 99ff0a288c08ec2071139c6031eb880fa9c95310 for #230. So maybe for non-CSV inputs we should disable buffering?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008526736,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008526736,IC_kwDOCGYnMM48HOWQ,9599,2022-01-10T04:07:29Z,2022-01-10T04:07:29Z,OWNER,"I think this test is right: ```python def test_insert_streaming_batch_size_1(db_path): # https://github.com/simonw/sqlite-utils/issues/364 # Streaming with --batch-size 1 should commit on each record # Can't use CliRunner().invoke() here bacuse we need to # run assertions in between writing to process stdin proc = subprocess.Popen( [ sys.executable, ""-m"", ""sqlite_utils"", ""insert"", db_path, ""rows"", ""-"", ""--nl"", ""--batch-size"", ""1"", ], stdin=subprocess.PIPE, ) proc.stdin.write(b'{""name"": ""Azi""}') proc.stdin.flush() assert list(Database(db_path)[""rows""].rows) == [{""name"": ""Azi""}] proc.stdin.write(b'{""name"": ""Suna""}') proc.stdin.flush() assert list(Database(db_path)[""rows""].rows) == [{""name"": ""Azi""}, {""name"": ""Suna""}] proc.stdin.close() proc.wait() ``` ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/348#issuecomment-1008383293,https://api.github.com/repos/simonw/sqlite-utils/issues/348,1008383293,IC_kwDOCGYnMM48GrU9,9599,2022-01-09T20:38:17Z,2022-01-09T20:38:17Z,OWNER,Documentation: https://sqlite-utils.datasette.io/en/latest/cli.html#creating-an-empty-database,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1067771698, https://github.com/simonw/sqlite-utils/issues/348#issuecomment-1008367607,https://api.github.com/repos/simonw/sqlite-utils/issues/348,1008367607,IC_kwDOCGYnMM48Gnf3,9599,2022-01-09T20:22:43Z,2022-01-09T20:22:43Z,OWNER,I'm not going to implement `--page-size` unless someone specifically requests it - I don't like having features that I've never needed to use myself.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1067771698, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008364701,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008364701,IC_kwDOCGYnMM48Gmyd,9599,2022-01-09T20:04:35Z,2022-01-09T20:04:35Z,OWNER,"The previous code for highlighting errors in syntax (which was already a bit confused thanks to the added `return`, see https://github.com/simonw/sqlite-utils/issues/355#issuecomment-991393684 - isn't compatible with this approach at all. I'm going to ditch it and just show a generic `Error: Could not compile code` message.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008354207,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008354207,IC_kwDOCGYnMM48GkOf,9599,2022-01-09T18:54:54Z,2022-01-09T18:54:54Z,OWNER,"This seems to work: ```python def _compile_code(code, imports, variable=""value""): locals = {} globals = {""r"": recipes, ""recipes"": recipes} # If user defined a convert() function, return that try: exec(code, globals, locals) return locals[""convert""] except (AttributeError, SyntaxError, NameError, KeyError, TypeError): pass # Try compiling their code as a function instead body_variants = [code] # If single line and no 'return', try adding the return if ""\n"" not in code and not code.strip().startswith(""return ""): body_variants.insert(0, ""return {}"".format(code)) for variant in body_variants: new_code = [""def fn({}):"".format(variable)] for line in variant.split(""\n""): new_code.append("" {}"".format(line)) try: code_o = compile(""\n"".join(new_code), """", ""exec"") break except SyntaxError: # Try another variant, e.g. for 'return row[""column""] = 1' continue for import_ in imports: globals[import_.split(""."")[0]] = __import__(import_) exec(code_o, globals, locals) return locals[""fn""] ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008348032,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008348032,IC_kwDOCGYnMM48GiuA,9599,2022-01-09T18:14:02Z,2022-01-09T18:14:02Z,OWNER,Here's the code in question: https://github.com/simonw/sqlite-utils/blob/b8c134059e89f0fa040b84fb7d0bda25b9a52759/sqlite_utils/utils.py#L288-L299,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008347768,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008347768,IC_kwDOCGYnMM48Gip4,9599,2022-01-09T18:12:30Z,2022-01-09T18:12:30Z,OWNER,"Tried this test: ```python result = CliRunner().invoke( cli.cli, [ ""insert"", db_path, ""rows"", ""-"", ""--convert"", 'row[""is_chicken""] = True', ], input='{""name"": ""Azi""}', ) ``` And got this error: > `E + where 1 = ', 2, 30, ' return row[""is_chicken""] = True\n'))>.exit_code` The code snippet compilation isn't currently compatible with this.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/374#issuecomment-1008346841,https://api.github.com/repos/simonw/sqlite-utils/issues/374,1008346841,IC_kwDOCGYnMM48GibZ,9599,2022-01-09T18:06:50Z,2022-01-09T18:06:50Z,OWNER,"In addition to a unit test I manually tested all of the above, e.g. ``` % sqlite-utils indexes global-power-plants.db sqlite_master --fmt rst ======= ============ ======= ===== ====== ====== ====== ===== table index_name seqno cid name desc coll key ======= ============ ======= ===== ====== ====== ====== ===== ======= ============ ======= ===== ====== ====== ====== ===== ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135860, https://github.com/simonw/sqlite-utils/issues/374#issuecomment-1008346338,https://api.github.com/repos/simonw/sqlite-utils/issues/374,1008346338,IC_kwDOCGYnMM48GiTi,9599,2022-01-09T18:03:22Z,2022-01-09T18:03:22Z,OWNER,"Commands that support `--fmt` (via the `@output_options` decorator) are: - `tables` - `views` - `query` - `memory` - `search` - `rows` - `triggers` - `indexes` ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135860, https://github.com/simonw/sqlite-utils/issues/374#issuecomment-1008345267,https://api.github.com/repos/simonw/sqlite-utils/issues/374,1008345267,IC_kwDOCGYnMM48GiCz,9599,2022-01-09T17:56:37Z,2022-01-09T17:56:37Z,OWNER,"Better: ```python if fmt: table = True ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135860, https://github.com/simonw/sqlite-utils/issues/373#issuecomment-1008344980,https://api.github.com/repos/simonw/sqlite-utils/issues/373,1008344980,IC_kwDOCGYnMM48Gh-U,9599,2022-01-09T17:54:53Z,2022-01-09T17:54:53Z,OWNER,Updated TIL: https://til.simonwillison.net/python/cog-to-update-help-in-readme#user-content-cog-for-restructuredtext,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135732, https://github.com/simonw/sqlite-utils/issues/373#issuecomment-1008344525,https://api.github.com/repos/simonw/sqlite-utils/issues/373,1008344525,IC_kwDOCGYnMM48Gh3N,9599,2022-01-09T17:52:22Z,2022-01-09T17:52:22Z,OWNER,Updated docs: https://sqlite-utils.datasette.io/en/latest/cli.html#table-formatted-output,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135732, https://github.com/simonw/sqlite-utils/issues/373#issuecomment-1008341078,https://api.github.com/repos/simonw/sqlite-utils/issues/373,1008341078,IC_kwDOCGYnMM48GhBW,9599,2022-01-09T17:31:12Z,2022-01-09T17:31:12Z,OWNER,"Found an example of using `cog` in a rST file here: https://github.com/nedbat/coveragepy/blob/f3238eea7e403d13a217b30579b1a1c2cbff62e3/doc/dbschema.rst#L21 ``` .. [[[cog from coverage.sqldata import SCHEMA_VERSION print("".. code::"") print() print(f"" SCHEMA_VERSION = {SCHEMA_VERSION}"") print() .. ]]] .. code:: SCHEMA_VERSION = 7 .. [[[end]]] ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135732, https://github.com/simonw/sqlite-utils/issues/375#issuecomment-1008338186,https://api.github.com/repos/simonw/sqlite-utils/issues/375,1008338186,IC_kwDOCGYnMM48GgUK,9599,2022-01-09T17:13:33Z,2022-01-09T17:13:54Z,OWNER," cat blah.csv | sqlite-utils bulk blah.db - \ ""insert into blah (:foo, :bar)"" --csv ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097251014, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008275546,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008275546,IC_kwDOCGYnMM48GRBa,536941,2022-01-09T11:01:15Z,2022-01-09T13:37:51Z,CONTRIBUTOR,"i don’t want to be such a partisan for analyze, but the query planner deciding *not* to use an index based on information collected by analyze is not necessarily a bug, but could be the correct choice. the original poster in that stack overflow doesn’t say there’s a performance regression ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/datasette/pull/1574#issuecomment-1008279307,https://api.github.com/repos/simonw/datasette/issues/1574,1008279307,IC_kwDOBm6k_c48GR8L,33631,2022-01-09T11:26:06Z,2022-01-09T11:26:06Z,NONE,"@fgregg my thinking was backwards compatibility. I don't know what people do to their builds, I just wanted a smaller image for my use case. @simonw any chance to take a look at this? If there is no interest, feel free to close the PR","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1084193403, https://github.com/simonw/sqlite-utils/issues/374#issuecomment-1008252732,https://api.github.com/repos/simonw/sqlite-utils/issues/374,1008252732,IC_kwDOCGYnMM48GLc8,9599,2022-01-09T08:25:30Z,2022-01-09T08:25:30Z,OWNER,Need to change `if table:` to `if table or fmt:` in a few places.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097135860, https://github.com/simonw/sqlite-utils/issues/372#issuecomment-1008247370,https://api.github.com/repos/simonw/sqlite-utils/issues/372,1008247370,IC_kwDOCGYnMM48GKJK,9599,2022-01-09T07:51:18Z,2022-01-09T07:51:18Z,OWNER,"Pathlib says the stem of that would be `dogs.and.cats.jpg` - best stick with that for consistency. https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.suffix It calls the last bit `suffix` - maybe I should use that instead of `ext`.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097129710, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008246366,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008246366,IC_kwDOCGYnMM48GJ5e,9599,2022-01-09T07:42:14Z,2022-01-09T07:42:14Z,OWNER,Also need to update relevant docs for that example.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/371#issuecomment-1008246239,https://api.github.com/repos/simonw/sqlite-utils/issues/371,1008246239,IC_kwDOCGYnMM48GJ3f,9599,2022-01-09T07:41:24Z,2022-01-09T07:41:24Z,OWNER,"Might be a case of modifying this line: https://github.com/simonw/sqlite-utils/blob/e0c476bc380744680c8b7675c24fb0e9f5ec6dcd/sqlite_utils/cli.py#L828 To: ```python docs = (fn(doc) or doc for doc in docs) ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097128334, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008234293,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008234293,IC_kwDOCGYnMM48GG81,9599,2022-01-09T05:37:02Z,2022-01-09T05:37:02Z,OWNER,Calling `p.stdin.close()` and then `p.wait()` terminates the subprocess.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008233910,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008233910,IC_kwDOCGYnMM48GG22,9599,2022-01-09T05:32:53Z,2022-01-09T05:35:45Z,OWNER,"This is strange. The following: ```pycon >>> import subprocess >>> p = subprocess.Popen([""sqlite-utils"", ""insert"", ""/tmp/stream.db"", ""stream"", ""-"", ""--nl""], stdin=subprocess.PIPE) >>> p.stdin.write(b'\n'.join(b'{""id"": %s}' % str(i).encode(""utf-8"") for i in range(1000))) 11889 >>> # At this point /tmp/stream.db is still 0 bytes - but if I then run this: >>> p.stdin.close() >>> # /tmp/stream.db is now 20K and contains the written data ``` No wait, mystery solved - I can add `p.stdin.flush()` instead of `p.stdin.close()` and the file suddenly jumps up in size.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008232075,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008232075,IC_kwDOCGYnMM48GGaL,9599,2022-01-09T05:13:15Z,2022-01-09T05:13:56Z,OWNER,"I think the query that will help solve this is: `explain query plan select * from ny_times_us_counties where state = 1 and county = 2` In this case, the query planner needs to decide if it should use the index for the `state` column or the index for the `county` column. That's where the statistics come into play. In particular: | tbl | idx | stat | |----------------------|---------------------------------|---------------| | ny_times_us_counties | idx_ny_times_us_counties_date | 2092871 2915 | | ny_times_us_counties | idx_ny_times_us_counties_fips | 2092871 651 | | ny_times_us_counties | idx_ny_times_us_counties_county | 2092871 1085 | | ny_times_us_counties | idx_ny_times_us_counties_state | 2092871 37373 | Those numbers are explained by this comment in the SQLite C code: https://github.com/sqlite/sqlite/blob/5622c7f97106314719740098cf0854e7eaa81802/src/analyze.c#L41-L55 ``` ** There is normally one row per index, with the index identified by the ** name in the idx column. The tbl column is the name of the table to ** which the index belongs. In each such row, the stat column will be ** a string consisting of a list of integers. The first integer in this ** list is the number of rows in the index. (This is the same as the ** number of rows in the table, except for partial indices.) The second ** integer is the average number of rows in the index that have the same ** value in the first column of the index. ``` So that table is telling us that using a value in the `county` column will filter down to an average of 1,085 rows, whereas filtering on the `state` column will filter down to an average of 37,373 - so clearly the `county` index is the better index to use here! Just one catch: against both my` covid.db` and my `covid-analyzed.db` databases the `county` index is picked for both of them - so SQLite is somehow guessing that `county` is a better index even though it doesn't have statistics for that.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008229839,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008229839,IC_kwDOCGYnMM48GF3P,9599,2022-01-09T04:51:44Z,2022-01-09T04:51:44Z,OWNER,"Found one report on Stack Overflow from 9 years ago of someone seeing broken performance after running `ANALYZE`, hard to say that's a trend and not a single weird edge-case though! https://stackoverflow.com/q/12947214/6083","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008229341,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008229341,IC_kwDOCGYnMM48GFvd,9599,2022-01-09T04:45:38Z,2022-01-09T04:47:11Z,OWNER,"This is probably too fancy. I think maybe the way to do this is with `select * from [global-power-plants] where ""country_long"" = 'United Kingdom'` - then mess around with stats to see if I can get it to use the index or not based on them. Here's the explain for that: https://global-power-plants.datasettes.com/global-power-plants?sql=EXPLAIN+QUERY+PLAN+select+*+from+[global-power-plants]+where+%22country_long%22+%3D+%27United+Kingdom%27","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008227625,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008227625,IC_kwDOCGYnMM48GFUp,9599,2022-01-09T04:25:38Z,2022-01-09T04:25:38Z,OWNER,"```sql EXPLAIN QUERY PLAN select country_long, count(*) from [global-power-plants] group by country_long ``` https://global-power-plants.datasettes.com/global-power-plants?sql=EXPLAIN+QUERY+PLAN+select+country_long%2C+count%28*%29+from+%5Bglobal-power-plants%5D+group+by+country_long > SCAN TABLE global-power-plants USING COVERING INDEX ""global-power-plants_country_long""","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/datasette/issues/1588#issuecomment-1008227436,https://api.github.com/repos/simonw/datasette/issues/1588,1008227436,IC_kwDOBm6k_c48GFRs,9599,2022-01-09T04:23:37Z,2022-01-09T04:25:04Z,OWNER,"Relevant code: https://github.com/simonw/datasette/blob/85849935292e500ab7a99f8fe0f9546e903baad3/datasette/utils/__init__.py#L163-L170 https://github.com/simonw/datasette/blob/85849935292e500ab7a99f8fe0f9546e903baad3/datasette/utils/__init__.py#L195-L204","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097101917, https://github.com/simonw/datasette/issues/1588#issuecomment-1008227491,https://api.github.com/repos/simonw/datasette/issues/1588,1008227491,IC_kwDOBm6k_c48GFSj,9599,2022-01-09T04:24:09Z,2022-01-09T04:24:09Z,OWNER,"I think this is the fix: ```python re.compile(r""^explain\s+query\s+plan\s+select\b""), ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097101917, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008226862,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008226862,IC_kwDOCGYnMM48GFIu,9599,2022-01-09T04:17:55Z,2022-01-09T04:17:55Z,OWNER,"There are some clues as to what effect ANALYZE has in https://www.sqlite.org/optoverview.html Some quotes: > SQLite might use a skip-scan on an index if it knows that the first one or more columns contain many duplication values. If there are too few duplicates in the left-most columns of the index, then it would be faster to simply step ahead to the next value, and thus do a full table scan, than to do a binary search on an index to locate the next left-column value. > > The only way that SQLite can know that there are many duplicates in the left-most columns of an index is if the ANALYZE command has been run on the database. Without the results of ANALYZE, SQLite has to guess at the ""shape"" of the data in the table, and the default guess is that there are an average of 10 duplicates for every value in the left-most column of the index. Skip-scan only becomes profitable (it only gets to be faster than a full table scan) when the number of duplicates is about 18 or more. Hence, a skip-scan is never used on a database that has not been analyzed. And > Join reordering is automatic and usually works well enough that programmers do not have to think about it, especially if ANALYZE has been used to gather statistics about the available indexes, though occasionally some hints from the programmer are needed. And > The various sqlite_statN tables contain information on how selective the various indexes are. For example, the sqlite_stat1 table might indicate that an equality constraint on column x reduces the search space to 10 rows on average, whereas an equality constraint on column y reduces the search space to 3 rows on average. In that case, SQLite would prefer to use index ex2i2 since that index is more selective. ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008226487,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008226487,IC_kwDOCGYnMM48GFC3,9599,2022-01-09T04:14:05Z,2022-01-09T04:14:05Z,OWNER,"Didn't manage to spot a meaningful difference with that database either: ``` analyze % python3 -m timeit '__import__(""sqlite3"").connect(""covid.db"").execute(""select fips, count(*) from [ny_times_us_counties] group by fips"").fetchall()' 2 loops, best of 5: 101 msec per loop analyze % python3 -m timeit '__import__(""sqlite3"").connect(""covid-analyzed.db"").execute(""select fips, count(*) from [ny_times_us_counties] group by fips"").fetchall()' 2 loops, best of 5: 103 msec per loop ``` Maybe `select fips, count(*) from [ny_times_us_counties] group by fips` isn't a good query for testing this?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008220270,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008220270,IC_kwDOCGYnMM48GDhu,9599,2022-01-09T03:12:38Z,2022-01-09T03:13:15Z,OWNER,"Basically no difference using this very basic benchmark: ``` analyze % python3 -m timeit '__import__(""sqlite3"").connect(""global-power-plants.db"").execute(""select country_long, count(*) from [global-power-plants] group by country_long"").fetchall()' 100 loops, best of 5: 2.39 msec per loop analyze % python3 -m timeit '__import__(""sqlite3"").connect(""global-power-plants-analyzed.db"").execute(""select country_long, count(*) from [global-power-plants] group by country_long"").fetchall()' 100 loops, best of 5: 2.38 msec per loop ``` I should try this against a much larger database. https://covid-19.datasettes.com/covid.db is 879MB.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008219844,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008219844,IC_kwDOCGYnMM48GDbE,9599,2022-01-09T03:08:09Z,2022-01-09T03:08:09Z,OWNER,"``` analyze % sqlite-utils global-power-plants-analyzed.db 'analyze' [{""rows_affected"": -1}] analyze % sqlite-utils tables global-power-plants-analyzed.db [{""table"": ""global-power-plants""}, {""table"": ""global-power-plants_fts""}, {""table"": ""global-power-plants_fts_data""}, {""table"": ""global-power-plants_fts_idx""}, {""table"": ""global-power-plants_fts_docsize""}, {""table"": ""global-power-plants_fts_config""}, {""table"": ""sqlite_stat1""}] analyze % sqlite-utils rows global-power-plants-analyzed.db sqlite_stat1 -t tbl idx stat ------------------------------- ---------------------------------- --------- global-power-plants_fts_config global-power-plants_fts_config 1 1 global-power-plants_fts_docsize 33643 global-power-plants_fts_idx global-power-plants_fts_idx 199 40 1 global-power-plants_fts_data 136 global-power-plants ""global-power-plants_owner"" 33643 4 global-power-plants ""global-power-plants_country_long"" 33643 202 ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008219588,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008219588,IC_kwDOCGYnMM48GDXE,9599,2022-01-09T03:06:42Z,2022-01-09T03:06:42Z,OWNER,"``` analyze % sqlite-utils indexes global-power-plants.db -t table index_name seqno cid name desc coll key ------------------------------ ------------------------------------------------- ------- ----- ------------ ------ ------ ----- global-power-plants ""global-power-plants_owner"" 0 12 owner 0 BINARY 1 global-power-plants ""global-power-plants_country_long"" 0 1 country_long 0 BINARY 1 global-power-plants_fts_idx sqlite_autoindex_global-power-plants_fts_idx_1 0 0 segid 0 BINARY 1 global-power-plants_fts_idx sqlite_autoindex_global-power-plants_fts_idx_1 1 1 term 0 BINARY 1 global-power-plants_fts_config sqlite_autoindex_global-power-plants_fts_config_1 0 0 k 0 BINARY 1 ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008219484,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008219484,IC_kwDOCGYnMM48GDVc,9599,2022-01-09T03:05:44Z,2022-01-09T03:05:44Z,OWNER,I'll start by running some experiments against the 11MB database file from https://global-power-plants.datasettes.com/global-power-plants.db,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/369#issuecomment-1008219191,https://api.github.com/repos/simonw/sqlite-utils/issues/369,1008219191,IC_kwDOCGYnMM48GDQ3,9599,2022-01-09T03:03:53Z,2022-01-09T03:03:53Z,OWNER,"Refs: - #366 - #365","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097091527, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008163585,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008163585,IC_kwDOCGYnMM48F1sB,9599,2022-01-08T22:14:39Z,2022-01-09T03:03:07Z,OWNER,"The reason I'm hesitating on this is that I've not actually used ANALYZE at all in nearly five years of messing around with SQLite! So I'm nervous that there are surprise downsides I haven't thought of. My hunch is that ANALYZE is only worth worrying about on much larger databases, in which case I'm OK supporting it as a thoroughly documented power-user feature rather than a default.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/368#issuecomment-1008216371,https://api.github.com/repos/simonw/sqlite-utils/issues/368,1008216371,IC_kwDOCGYnMM48GCkz,9599,2022-01-09T02:36:22Z,2022-01-09T02:36:22Z,OWNER,"In Python 3.6: https://docs.python.org/3.6/library/subprocess.html > This does not capture stdout or stderr by default. To do so, pass [`PIPE`](https://docs.python.org/3.6/library/subprocess.html#subprocess.PIPE ""subprocess.PIPE"") for the *stdout* and/or *stderr* arguments.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097087280, https://github.com/simonw/sqlite-utils/issues/368#issuecomment-1008216271,https://api.github.com/repos/simonw/sqlite-utils/issues/368,1008216271,IC_kwDOCGYnMM48GCjP,9599,2022-01-09T02:35:09Z,2022-01-09T02:35:09Z,OWNER,"Test failure on Python 3.6: > `E TypeError: __init__() got an unexpected keyword argument 'capture_output'`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097087280, https://github.com/simonw/sqlite-utils/pull/367#issuecomment-1008158799,https://api.github.com/repos/simonw/sqlite-utils/issues/367,1008158799,IC_kwDOCGYnMM48F0hP,22429695,2022-01-08T21:36:55Z,2022-01-09T02:34:44Z,NONE,"# [Codecov](https://codecov.io/gh/simonw/sqlite-utils/pull/367?src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) Report > Merging [#367](https://codecov.io/gh/simonw/sqlite-utils/pull/367?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (9848eaa) into [main](https://codecov.io/gh/simonw/sqlite-utils/commit/a8f9cc6f64f299830834428509940d448b82b4ed?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (a8f9cc6) will **decrease** coverage by `0.20%`. > The diff coverage is `50.00%`. 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Last update [a8f9cc6...9848eaa](https://codecov.io/gh/simonw/sqlite-utils/pull/367?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097041471, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008216201,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008216201,IC_kwDOCGYnMM48GCiJ,9599,2022-01-09T02:34:12Z,2022-01-09T02:34:12Z,OWNER,"I can now write tests that look like this: https://github.com/simonw/sqlite-utils/blob/539f5ccd90371fa87f946018f8b77d55929e06db/tests/test_cli.py#L2024-L2030 Which means I can write a test that exercises this bug.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/368#issuecomment-1008215912,https://api.github.com/repos/simonw/sqlite-utils/issues/368,1008215912,IC_kwDOCGYnMM48GCdo,9599,2022-01-09T02:30:59Z,2022-01-09T02:30:59Z,OWNER,"Even better, inspired by `rich`, support `python -m sqlite_utils`. https://github.com/Textualize/rich/blob/master/rich/__main__.py","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097087280, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008214998,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008214998,IC_kwDOCGYnMM48GCPW,9599,2022-01-09T02:23:20Z,2022-01-09T02:23:20Z,OWNER,"Possible way of running the test: add this to `sqlite_utils/cli.py`: ```python if __name__ == ""__main__"": cli() ``` Now the tool can be run using `python -m sqlite_utils.cli --help` Then in the test use `subprocess` to call `sys.executable` (the path to the current Python interpreter) and pass it `-m sqlite_utils.cli` to run the script!","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008214406,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008214406,IC_kwDOCGYnMM48GCGG,9599,2022-01-09T02:18:21Z,2022-01-09T02:18:21Z,OWNER,"I'm having trouble figuring out the best way to write a unit test for this. Filed a relevant feature request for Click here: - https://github.com/pallets/click/issues/2171","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008166084,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008166084,IC_kwDOCGYnMM48F2TE,536941,2022-01-08T22:32:47Z,2022-01-08T22:32:47Z,CONTRIBUTOR,or using “ pragma optimize”,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008164786,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008164786,IC_kwDOCGYnMM48F1-y,536941,2022-01-08T22:24:19Z,2022-01-08T22:24:19Z,CONTRIBUTOR,the out-of-date scenario you describe could be addressed by automatically adding an analyze to the insert or convert commands if they implicate an index,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008164116,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008164116,IC_kwDOCGYnMM48F10U,536941,2022-01-08T22:18:57Z,2022-01-08T22:18:57Z,CONTRIBUTOR,"the table with the query ran so bad was about 50k. i think the scenario should not be worse than no stats. i also did not know that sqlite was so different from postgres and needed an explicit analyze call.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008163050,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008163050,IC_kwDOCGYnMM48F1jq,9599,2022-01-08T22:10:51Z,2022-01-08T22:10:51Z,OWNER,"Is there a downside to having a `sqlite_stat1` table if it has wildly incorrect statistics in it? Imagine the following sequence of events: - User imports a few records, creating the table, using `sqlite-utils insert` - User runs `sqlite-utils create-index ...` which also creates and populates the `sqlite_stat1` table - User runs `insert` again to populate several million new records The user now has a database file with several million records and a statistics table that is wildly out of date, having been populated when they only had a few. Will this result in surprisingly bad query performance compared to it that statistics table did not exist at all? If so, I lean much harder towards `ANALYZE` as a strictly opt-in optimization, maybe with the `--analyze` option added to `sqlite-utils insert` top to help users opt in to updating their statistics after running big inserts.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008161965,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008161965,IC_kwDOCGYnMM48F1St,536941,2022-01-08T22:02:56Z,2022-01-08T22:02:56Z,CONTRIBUTOR,"for options 2 and 3, i would worry about discoverablity. in other db’s it is not necessary to explicitly call analyze for most indices. ie for postgres > The system regularly collects statistics on all of a table's columns. Newly-created non-expression indexes can immediately use these statistics to determine an index's usefulness. i suppose i would propose raising a warning if the stats table is created that explains what is going on and informs users about a —no-analyze argument.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1008158616,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1008158616,IC_kwDOCGYnMM48F0eY,9599,2022-01-08T21:35:32Z,2022-01-08T21:35:32Z,OWNER,"Built a prototype in a branch, see #367.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1008158357,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1008158357,IC_kwDOCGYnMM48F0aV,9599,2022-01-08T21:33:07Z,2022-01-08T21:33:07Z,OWNER,"The one thing that worries me a little bit about doing this by default is that it adds a surprising new table to the database - it may be confusing to users if they run `create-index` and their database suddenly has a new `sqlite_stat1` table, see https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1008157132 Options here are: - Do it anyway. People can tolerate a surprise table appearing when they create an index. - Only run `ANALYZE` if the user says `sqlite-utils create-index ... --analyze` - Use the `--analyze` option, but also automatically run `ANALYZE` if they create an index and the database they are working with already has a `sqlite_stat1` table I'm currently leading towards that third option - @fgregg any thoughts?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/datasette/issues/1587#issuecomment-1008157998,https://api.github.com/repos/simonw/datasette/issues/1587,1008157998,IC_kwDOBm6k_c48F0Uu,9599,2022-01-08T21:29:54Z,2022-01-08T21:29:54Z,OWNER,Relevant code: https://github.com/simonw/datasette/blob/00a2895cd2dc42c63846216b36b2dc9f41170129/datasette/database.py#L339-L354,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097040427, https://github.com/simonw/datasette/issues/1587#issuecomment-1008157908,https://api.github.com/repos/simonw/datasette/issues/1587,1008157908,IC_kwDOBm6k_c48F0TU,9599,2022-01-08T21:29:06Z,2022-01-08T21:29:06Z,OWNER,"Depending on the SQLite version (and compile options) that ran `ANALYZE` these can be called: - `sqlite_stat1` - `sqlite_stat2` - `sqlite_stat3` - `sqlite_stat4`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1097040427, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1008157132,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1008157132,IC_kwDOCGYnMM48F0HM,9599,2022-01-08T21:23:08Z,2022-01-08T21:25:05Z,OWNER,"Running `ANALYZE` creates a new visible table called `sqlite_stat1`: https://www.sqlite.org/fileformat.html#the_sqlite_stat1_table This should be added to the default list of hidden tables in Datasette. It looks something like this: | tbl | idx | stat | |---------------------------------|------------------------------------|-----------| | _counts | sqlite_autoindex__counts_1 | 5 1 | | global-power-plants_fts_config | global-power-plants_fts_config | 1 1 | | global-power-plants_fts_docsize | | 33643 | | global-power-plants_fts_idx | global-power-plants_fts_idx | 199 40 1 | | global-power-plants_fts_data | | 136 | | global-power-plants | ""global-power-plants_owner"" | 33643 4 | | global-power-plants | ""global-power-plants_country_long"" | 33643 202 | > In each such row, the sqlite_stat.stat column will be a string consisting of a list of integers followed by zero or more arguments. The first integer in this list is the approximate number of rows in the index. (The number of rows in the index is the same as the number of rows in the table, except for partial indexes.) The second integer is the approximate number of rows in the index that have the same value in the first column of the index. The third integer is the number number of rows in the index that have the same value for the first two columns. The N-th integer (for N>1) is the estimated average number of rows in the index which have the same value for the first N-1 columns. For a K-column index, there will be K+1 integers in the stat column. If the index is unique, then the last integer will be 1. ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008155916,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008155916,IC_kwDOCGYnMM48Fz0M,9599,2022-01-08T21:16:46Z,2022-01-08T21:16:46Z,OWNER,"No, `chunks()` seems to work OK in the test I just added.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008154873,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008154873,IC_kwDOCGYnMM48Fzj5,9599,2022-01-08T21:11:55Z,2022-01-08T21:11:55Z,OWNER,"I'm suspicious that the `chunks()` utility function may not be working correctly: ```pycon In [10]: [list(d) for d in list(chunks('abc', 5))] Out[10]: [['a'], ['b'], ['c']] In [11]: [list(d) for d in list(chunks('abcdefghi', 5))] Out[11]: [['a'], ['b'], ['c'], ['d'], ['e'], ['f'], ['g'], ['h'], ['i']] In [12]: [list(d) for d in list(chunks('abcdefghi', 3))] Out[12]: [['a'], ['b'], ['c'], ['d'], ['e'], ['f'], ['g'], ['h'], ['i']] ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008153586,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008153586,IC_kwDOCGYnMM48FzPy,9599,2022-01-08T21:06:15Z,2022-01-08T21:06:15Z,OWNER,"I added a print statement after `for query, params in queries_and_params` and confirmed that something in the code is waiting until 16 records are available to be inserted and then executing the inserts, even with `--batch-size 1`.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008151884,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008151884,IC_kwDOCGYnMM48Fy1M,9599,2022-01-08T20:59:21Z,2022-01-08T20:59:21Z,OWNER,"(That Heroku example doesn't record the timestamp, which limits its usefulness)","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008143248,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008143248,IC_kwDOCGYnMM48FwuQ,9599,2022-01-08T20:34:12Z,2022-01-08T20:34:12Z,OWNER,Built that tool: https://github.com/simonw/stream-delay and https://pypi.org/project/stream-delay/,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/sqlite-utils/issues/364#issuecomment-1008129841,https://api.github.com/repos/simonw/sqlite-utils/issues/364,1008129841,IC_kwDOCGYnMM48Ftcx,9599,2022-01-08T20:04:42Z,2022-01-08T20:04:42Z,OWNER,"It would be easier to test this if I had a utility for streaming out a file one line at a time. A few recipes for this in https://superuser.com/questions/526242/cat-file-to-terminal-at-particular-speed-of-lines-per-second - I'm going to build a quick `stream-delay` tool though.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1095570074, https://github.com/simonw/datasette/pull/1574#issuecomment-1007844190,https://api.github.com/repos/simonw/datasette/issues/1574,1007844190,IC_kwDOBm6k_c48Ente,536941,2022-01-08T00:42:12Z,2022-01-08T00:42:12Z,CONTRIBUTOR,is there a reason to not always use the slim option?,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1084193403, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1007643254,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1007643254,IC_kwDOCGYnMM48D2p2,9599,2022-01-07T18:37:56Z,2022-01-07T18:37:56Z,OWNER,Or I could leave off `--no-analyze` and tell people that if they want to add an index without running analyze they can execute the `CREATE INDEX` themselves.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1007642831,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1007642831,IC_kwDOCGYnMM48D2jP,9599,2022-01-07T18:37:18Z,2022-01-07T18:37:18Z,OWNER,"After implementing #366 I can make it so `sqlite-utils create-index` automatically runs `db.analyze(index_name)` afterwards, maybe with a `--no-analyze` option in case anyone wants to opt out of that for specific performance reasons.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1007641634,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1007641634,IC_kwDOCGYnMM48D2Qi,9599,2022-01-07T18:35:35Z,2022-01-07T18:35:35Z,OWNER,"Since the existing CLI feature is this: $ sqlite-utils analyze-tables github.db tags I can add `sqlite-utils analyze` to reflect the Python library method.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1007639860,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1007639860,IC_kwDOCGYnMM48D100,9599,2022-01-07T18:32:59Z,2022-01-07T18:33:07Z,OWNER,"From the SQLite docs: > If no arguments are given, all attached databases are analyzed. If a schema name is given as the argument, then all tables and indices in that one database are analyzed. If the argument is a table name, then only that table and the indices associated with that table are analyzed. If the argument is an index name, then only that one index is analyzed. So I think this becomes two methods: - `db.analyze()` calls analyze on the whole database - `db.analyze(name_of_table_or_index)` for a specific named table or index - `table.analyze()` is a shortcut for `db.analyze(table.name)`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/366#issuecomment-1007637963,https://api.github.com/repos/simonw/sqlite-utils/issues/366,1007637963,IC_kwDOCGYnMM48D1XL,9599,2022-01-07T18:30:13Z,2022-01-07T18:30:13Z,OWNER,"Annoyingly I use the word ""analyze"" to mean something else in the CLI - for these features: - #207 - #320 there's only one method with a similar name in the Python library though and that's this one: https://github.com/simonw/sqlite-utils/blob/6e46b9913411682f3a3ec66f4d58886c1db8654b/sqlite_utils/db.py#L2904-L2906","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096563265, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1007636709,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1007636709,IC_kwDOCGYnMM48D1Dl,536941,2022-01-07T18:28:33Z,2022-01-07T18:29:43Z,CONTRIBUTOR,"i added an index to one table with sqlite-utils, and then a query that used to take about 1 second started taking hundreds of seconds. running analyze got me back to sub second speed.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1007634999,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1007634999,IC_kwDOCGYnMM48D0o3,9599,2022-01-07T18:26:22Z,2022-01-07T18:26:22Z,OWNER,"I've not used the `ANALYZE` feature in SQLite at all before. Should probably add Python library methods for it. Annoyingly I use the word ""analyze"" to mean something else in the CLI - for these features: - #207 - #320","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/simonw/sqlite-utils/issues/365#issuecomment-1007633376,https://api.github.com/repos/simonw/sqlite-utils/issues/365,1007633376,IC_kwDOCGYnMM48D0Pg,9599,2022-01-07T18:24:07Z,2022-01-07T18:24:07Z,OWNER,Relevant documentation: https://www.sqlite.org/lang_analyze.html,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1096558279, https://github.com/dogsheep/dogsheep-photos/pull/36#issuecomment-1006708046,https://api.github.com/repos/dogsheep/dogsheep-photos/issues/36,1006708046,IC_kwDOD079W848ASVO,71983,2022-01-06T16:04:46Z,2022-01-06T16:04:46Z,NONE,"This one got me, today, too. 👍","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",988493790, https://github.com/simonw/sqlite-utils/issues/363#issuecomment-1006344080,https://api.github.com/repos/simonw/sqlite-utils/issues/363,1006344080,IC_kwDOCGYnMM47-5eQ,9599,2022-01-06T07:32:05Z,2022-01-06T07:32:05Z,OWNER,As part of this work I should add test coverage of this error message too: https://github.com/simonw/sqlite-utils/blob/413f8ed754e38d7b190de888c85fe8438336cb11/sqlite_utils/cli.py#L826,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1094981339, https://github.com/simonw/sqlite-utils/issues/363#issuecomment-1006343303,https://api.github.com/repos/simonw/sqlite-utils/issues/363,1006343303,IC_kwDOCGYnMM47-5SH,9599,2022-01-06T07:30:20Z,2022-01-06T07:30:20Z,OWNER,This check should run inside the `.insert_all()` method. It should raise a custom exception which the CLI code can then catch and turn into a click error.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1094981339, https://github.com/simonw/sqlite-utils/issues/356#issuecomment-1006318443,https://api.github.com/repos/simonw/sqlite-utils/issues/356,1006318443,IC_kwDOCGYnMM47-zNr,9599,2022-01-06T06:30:13Z,2022-01-06T06:30:13Z,OWNER,"Documentation: - https://sqlite-utils.datasette.io/en/latest/cli.html#inserting-unstructured-data-with-lines-and-text - https://sqlite-utils.datasette.io/en/latest/cli.html#applying-conversions-while-inserting-data","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1077431957, https://github.com/simonw/sqlite-utils/issues/356#issuecomment-1006318007,https://api.github.com/repos/simonw/sqlite-utils/issues/356,1006318007,IC_kwDOCGYnMM47-zG3,9599,2022-01-06T06:28:53Z,2022-01-06T06:28:53Z,OWNER,Implemented in #361.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1077431957, https://github.com/simonw/sqlite-utils/pull/361#issuecomment-1006219956,https://api.github.com/repos/simonw/sqlite-utils/issues/361,1006219956,IC_kwDOCGYnMM47-bK0,22429695,2022-01-06T01:51:54Z,2022-01-06T06:22:25Z,NONE,"# [Codecov](https://codecov.io/gh/simonw/sqlite-utils/pull/361?src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) Report > Merging [#361](https://codecov.io/gh/simonw/sqlite-utils/pull/361?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (b7f0b88) into [main](https://codecov.io/gh/simonw/sqlite-utils/commit/f3fd8613113d21d44238a6ec54b375f5aa72c4e0?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison) (f3fd861) will **decrease** coverage by `0.05%`. > The diff coverage is `92.85%`. 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Last update [f3fd861...b7f0b88](https://codecov.io/gh/simonw/sqlite-utils/pull/361?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Simon+Willison). ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1094890366, https://github.com/simonw/sqlite-utils/pull/361#issuecomment-1006315145,https://api.github.com/repos/simonw/sqlite-utils/issues/361,1006315145,IC_kwDOCGYnMM47-yaJ,9599,2022-01-06T06:20:51Z,2022-01-06T06:20:51Z,OWNER,This is all documented. I'm going to rebase-merge it to keep the individual commits.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1094890366, https://github.com/simonw/sqlite-utils/pull/361#issuecomment-1006311742,https://api.github.com/repos/simonw/sqlite-utils/issues/361,1006311742,IC_kwDOCGYnMM47-xk-,9599,2022-01-06T06:12:19Z,2022-01-06T06:12:19Z,OWNER,"Got that working: ``` % echo 'This is cool' | sqlite-utils insert words.db words - --text --convert '({""word"": w} for w in text.split())' % sqlite-utils dump words.db BEGIN TRANSACTION; CREATE TABLE [words] ( [word] TEXT ); INSERT INTO ""words"" VALUES('This'); INSERT INTO ""words"" VALUES('is'); INSERT INTO ""words"" VALUES('cool'); COMMIT; ```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1094890366,