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Posted to notifications@superset.apache.org by GitBox <gi...@apache.org> on 2022/07/27 19:52:58 UTC
[GitHub] [superset] john-bodley opened a new pull request, #20893: fix: Address performance regression introduced in #11785
john-bodley opened a new pull request, #20893:
URL: https://github.com/apache/superset/pull/20893
<!---
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Example:
fix(dashboard): load charts correctly
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### SUMMARY
This PR fixes a SQL Lab performance regression introduced in https://github.com/apache/superset/pull/11785—a mere two years ago—which impacts the populating the tables in the SQL Lab LHS.
Specially at Airbnb for the Presto database the following line
```
dataset_tables = {table.name: table for table in database.tables}
```
would take over 5 seconds to execute given we have over 100,000 tables registered with said database in Superset. The fix is to bypass model and fetch only the subset of relevant tables using the SQLAlchemy ORM. The resulting refactor reduced the statement execution time down to << 0.01 seconds.
### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF
<!--- Skip this if not applicable -->
### TESTING INSTRUCTIONS
CI.
### ADDITIONAL INFORMATION
<!--- Check any relevant boxes with "x" -->
<!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
- [ ] Has associated issue:
- [ ] Required feature flags:
- [ ] Changes UI
- [ ] Includes DB Migration (follow approval process in [SIP-59](https://github.com/apache/superset/issues/13351))
- [ ] Migration is atomic, supports rollback & is backwards-compatible
- [ ] Confirm DB migration upgrade and downgrade tested
- [ ] Runtime estimates and downtime expectations provided
- [ ] Introduces new feature or API
- [ ] Removes existing feature or API
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[GitHub] [superset] john-bodley commented on a diff in pull request #20893: fix: Address performance regression introduced in #11785
Posted by GitBox <gi...@apache.org>.
john-bodley commented on code in PR #20893:
URL: https://github.com/apache/superset/pull/20893#discussion_r931527531
##########
superset/connectors/sqla/models.py:
##########
@@ -835,11 +836,9 @@ def get_perm(self) -> str:
raise DatasetInvalidPermissionEvaluationException()
return f"[{self.database}].[{self.table_name}](id:{self.id})"
- @property
+ @hybrid_property
def name(self) -> str:
- if not self.schema:
- return self.table_name
- return "{}.{}".format(self.schema, self.table_name)
+ return self.schema + "." + self.table_name if self.schema else self.table_name
Review Comment:
The logic needed to be translated into a function that SQLAlchemy could understand as we're using this hybrid property as a filter.
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[GitHub] [superset] codecov[bot] commented on pull request #20893: fix: Address performance regression introduced in #11785
Posted by GitBox <gi...@apache.org>.
codecov[bot] commented on PR #20893:
URL: https://github.com/apache/superset/pull/20893#issuecomment-1197501444
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@@ Coverage Diff @@
## master #20893 +/- ##
===========================================
- Coverage 66.27% 54.80% -11.48%
===========================================
Files 1758 1758
Lines 67072 67071 -1
Branches 7122 7122
===========================================
- Hits 44453 36758 -7695
- Misses 20800 28494 +7694
Partials 1819 1819
```
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[GitHub] [superset] john-bodley merged pull request #20893: fix: Address performance regression introduced in #11785
Posted by GitBox <gi...@apache.org>.
john-bodley merged PR #20893:
URL: https://github.com/apache/superset/pull/20893
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