fix: scan hint checks order asc #4365
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WalkthroughThe recent changes primarily focus on SQL query optimizations and adjustments to SQL analysis processes. A new SQL query with an Changes
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Files selected for processing (13)
- src/mito2/src/read/scan_region.rs (2 hunks)
- src/mito2/src/read/seq_scan.rs (1 hunks)
- src/mito2/src/read/unordered_scan.rs (1 hunks)
- src/query/src/optimizer/scan_hint.rs (2 hunks)
- src/store-api/src/storage/requests.rs (1 hunks)
- tests/cases/standalone/common/show/show_databases_tables.result (1 hunks)
- tests/cases/standalone/common/show/show_databases_tables.sql (1 hunks)
- tests/cases/standalone/common/system/information_schema.result (1 hunks)
- tests/cases/standalone/common/system/information_schema.sql (1 hunks)
- tests/cases/standalone/common/view/create.result (1 hunks)
- tests/cases/standalone/common/view/create.sql (1 hunks)
- tests/cases/standalone/optimizer/last_value.result (1 hunks)
- tests/cases/standalone/optimizer/last_value.sql (1 hunks)
Files skipped from review due to trivial changes (4)
- tests/cases/standalone/common/show/show_databases_tables.sql
- tests/cases/standalone/common/system/information_schema.sql
- tests/cases/standalone/common/view/create.result
- tests/cases/standalone/common/view/create.sql
Additional comments not posted (11)
tests/cases/standalone/optimizer/last_value.sql (1)
19-26: Ensure thelast_valuefunction is used correctly.The
last_valuefunction is used with anorder byclause to ensure the correct value is selected. Verify that thetscolumn is indexed and that the optimizer correctly handles this query.Verification successful
The
last_valuefunction is used correctly, and thetscolumn is indexed.
- The
tscolumn is indexed in the relevantcreate tablestatements.- The
last_valuefunction is used with theorder by tsclause correctly.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the `last_value` function usage and indexing of `ts` column. # Test: Check if `ts` column is indexed. Expect: Index on `ts` column. rg --type sql -A 5 $'create table t (\n ts timestamp time index,'Length of output: 341
Script:
#!/bin/bash # Description: Verify the `last_value` function usage and indexing of `ts` column. # Test: Check if `ts` column is indexed. Expect: Index on `ts` column. rg --type sql -A 5 'create table t' | grep -i 'ts timestamp' # Test: Verify the usage of `last_value` function in the SQL query. rg --type sql 'last_value'Length of output: 4946
src/store-api/src/storage/requests.rs (1)
17-17: LGTM! TheDisplaytrait addition is appropriate.The addition of the
Displaytrait to theTimeSeriesRowSelectorenum is a useful enhancement for formatted output.tests/cases/standalone/optimizer/last_value.result (1)
1-51: Verify the expected results for theexplain analyzequery.The expected results for the
explain analyzequery withlast_valuefunctions should be verified to ensure accuracy. Ensure that the query plan and results match the expected behavior.tests/cases/standalone/common/show/show_databases_tables.result (1)
107-108: Ensure regex replacements are accurate.The regex replacements for datetime and whitespace matching should be verified to ensure they correctly match the expected patterns.
src/mito2/src/read/unordered_scan.rs (1)
217-217: Method name change looks good.The method name
format_partshas been changed toformat_for_explainto better reflect its purpose.src/query/src/optimizer/scan_hint.rs (1)
215-217: Order by expression validation looks good.The conditions ensure that the
order byexpression is in ascending order and is a bare column reference, which is necessary for thelast_valuefunction.src/mito2/src/read/seq_scan.rs (1)
451-451: Method name change looks good.The method name
format_partshas been changed toformat_for_explainto better reflect its purpose.src/mito2/src/read/scan_region.rs (1)
Line range hint
820-842:
Method name change looks good.The method name
format_partshas been changed toformat_for_explainto better reflect its purpose.tests/cases/standalone/common/system/information_schema.result (3)
7-7: Regex pattern for datetime matching looks good.The pattern
(\s[\-0-9T:\.]{15,})is appropriate for matching datetime strings.
8-8: Regex pattern for whitespace matching looks good.The pattern
[\u0020\-]+is appropriate for matching whitespace characters.
14-48: Table data additions look good.The table data in the
information_schema.tablestable is consistent and correct. The datetime values are standardized toDATETIME.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #4365 +/- ##
==========================================
- Coverage 85.15% 84.86% -0.29%
==========================================
Files 1063 1064 +1
Lines 189987 190003 +16
==========================================
- Hits 161782 161255 -527
- Misses 28205 28748 +543 |
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Files selected for processing (2)
- tests/cases/standalone/optimizer/last_value.result (1 hunks)
- tests/cases/standalone/optimizer/last_value.sql (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- tests/cases/standalone/optimizer/last_value.result
Additional comments not posted (2)
tests/cases/standalone/optimizer/last_value.sql (2)
19-20: Ensure redacted content is handled correctly.The comments indicate redacted replacements for metrics and partitioning. Ensure that these replacements are handled correctly in the actual implementation.
21-27: Verify theexplain analyzestatement andselectquery.The
explain analyzestatement is correctly used to analyze the query performance. Theselectquery utilizeslast_valuefunctions with anorder by tsclause and groups byhost. Ensure that thelast_valuefunctions and theorder by tsclause are correctly implemented to achieve the desired ascending sort order.
Co-authored-by: Ruihang Xia <waynestxia@gmail.com>
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Files selected for processing (1)
- src/query/src/optimizer/scan_hint.rs (2 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/query/src/optimizer/scan_hint.rs
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What's changed and what's your intention?
The scan hint optimizer should ensure the sort expr is asc instead of desc.
This PR also fixes some unstable sqlness tests.
Checklist
Summary by CodeRabbit
New Features
Enhancements
explain analyzeandlast_valuefunctions for more detailed query analysis.ScanHintVisitorto enforce constraints on column references forlast_value()functions.Tests