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[Quy Anh] «Elliot» Nguyen
2026-06-24 13:47:14 +02:00
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## Summary
<!--Explain briefly what goes wrong and explain why you believe this is a bug and not the intended behavior of SQLite (if it is not a crash).-->**No review yet**
## Minimized query
```sql
.stats on
CREATE TABLE T (
a TEXT,
b REAL
);
INSERT INTO T VALUES ('a',100.0), ('b',-200.5), ('c',9e999);
CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c INT, d INT);
INSERT INTO t1 VALUES (1, 'Wernher', 10, 100);
INSERT INTO t1 VALUES (2, 'von', 20, 200);
INSERT INTO t1 VALUES (3, 'Braun', 30, 300);
CREATE INDEX t1bc ON t1(b, c);
PRAGMA writable_schema = ON;
.imposter t1bc t2
SELECT * FROM t2;
SELECT b, c FROM t1 ORDER BY b, c;
.quit
SELECT a,b,
LEAD(b,1) OVER (ORDER BY b DESC) AS c,
NTILE(2) OVER (ORDER BY b DESC) AS d FROM T;
PRAGMA query_only;
INSERT INTO T VALUES (1, NULL) ON CONFLICT(a) DO UPDATE SET a = excluded.a, b = excluded.b;
SELECT COUNT(*) FROM t1;
SELECT * FROM T;
SELECT COUNT(*) FROM t1;
ANALYZE;
ALTER TABLE T RENAME TO T_r9134;
```
## Actual output
```sql
Memory Used: 78880 (max 80432) bytes
Number of Outstanding Allocations: 162 (max 176)
Number of Pcache Overflow Bytes: 16928 (max 16928) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 32 (max 88)
Successful lookaside attempts: 107
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 13592 bytes
Page cache hits: 4
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1008 bytes
Statement Heap/Lookaside Usage: 2416 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 30
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2416
Bytes received by read(): 7336
Bytes sent to write(): 0
Read() system calls: 14
Write() system calls: 0
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 76488 (max 82168) bytes
Number of Outstanding Allocations: 151 (max 176)
Number of Pcache Overflow Bytes: 16928 (max 16928) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 44 (max 88)
Successful lookaside attempts: 141
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 13592 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1032 bytes
Statement Heap/Lookaside Usage: 3680 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 32
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3680
Bytes received by read(): 7430
Bytes sent to write(): 1293
Read() system calls: 16
Write() system calls: 1
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 83664 (max 89344) bytes
Number of Outstanding Allocations: 172 (max 187)
Number of Pcache Overflow Bytes: 21288 (max 21288) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 32 (max 88)
Successful lookaside attempts: 216
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17936 bytes
Page cache hits: 4
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1360 bytes
Statement Heap/Lookaside Usage: 2480 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 28
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2480
Bytes received by read(): 7527
Bytes sent to write(): 2589
Read() system calls: 18
Write() system calls: 2
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81208 (max 89344) bytes
Number of Outstanding Allocations: 161 (max 187)
Number of Pcache Overflow Bytes: 21288 (max 21288) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 41 (max 88)
Successful lookaside attempts: 238
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17936 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1384 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 7624
Bytes sent to write(): 3885
Read() system calls: 20
Write() system calls: 3
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81208 (max 89344) bytes
Number of Outstanding Allocations: 161 (max 187)
Number of Pcache Overflow Bytes: 21288 (max 21288) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 41 (max 88)
Successful lookaside attempts: 260
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17936 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1384 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 7721
Bytes sent to write(): 5181
Read() system calls: 22
Write() system calls: 4
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81208 (max 89344) bytes
Number of Outstanding Allocations: 161 (max 187)
Number of Pcache Overflow Bytes: 21288 (max 21288) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 41 (max 88)
Successful lookaside attempts: 282
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17936 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1384 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 7818
Bytes sent to write(): 6477
Read() system calls: 24
Write() system calls: 5
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 88616 (max 98408) bytes
Number of Outstanding Allocations: 181 (max 193)
Number of Pcache Overflow Bytes: 25648 (max 25648) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 32 (max 92)
Successful lookaside attempts: 362
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22280 bytes
Page cache hits: 5
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1584 bytes
Statement Heap/Lookaside Usage: 2768 bytes
Fullscan Steps: 0
Sort Operations: 1
Autoindex Inserts: 0
Virtual Machine Steps: 56
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2768
Bytes received by read(): 7915
Bytes sent to write(): 7773
Read() system calls: 26
Write() system calls: 6
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 85776 (max 98408) bytes
Number of Outstanding Allocations: 164 (max 193)
Number of Pcache Overflow Bytes: 25648 (max 25648) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 35 (max 92)
Successful lookaside attempts: 367
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22280 bytes
Page cache hits: 0
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 1584 bytes
Statement Heap/Lookaside Usage: 2528 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 4
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2528
Bytes received by read(): 8012
Bytes sent to write(): 9069
Read() system calls: 28
Write() system calls: 7
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
CREATE TABLE "t2"("b","c","_ROWID_",PRIMARY KEY("b","c","_ROWID_"))WITHOUT ROWID;
WARNING: writing to an imposter table will corrupt the "t1bc" index!
Braun|30|3
Wernher|10|1
von|20|2
Memory Used: 86336 (max 98408) bytes
Number of Outstanding Allocations: 174 (max 193)
Number of Pcache Overflow Bytes: 25648 (max 25648) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 45 (max 97)
Successful lookaside attempts: 490
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22280 bytes
Page cache hits: 5
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 2128 bytes
Statement Heap/Lookaside Usage: 4752 bytes
Fullscan Steps: 2
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 21
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 4752
Bytes received by read(): 8109
Bytes sent to write(): 10515
Read() system calls: 30
Write() system calls: 9
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Braun|30
Wernher|10
von|20
Memory Used: 86360 (max 98408) bytes
Number of Outstanding Allocations: 175 (max 193)
Number of Pcache Overflow Bytes: 25648 (max 25648) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4360 bytes
Lookaside Slots Used: 45 (max 97)
Successful lookaside attempts: 529
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22280 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Schema Heap Usage: 2152 bytes
Statement Heap/Lookaside Usage: 4752 bytes
Fullscan Steps: 2
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 19
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 4752
Bytes received by read(): 8207
Bytes sent to write(): 11845
Read() system calls: 32
Write() system calls: 10
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
```
## Expectation
```sql
Memory Used: 79408 (max 80944) bytes
Number of Outstanding Allocations: 172 (max 186)
Number of Pcache Overflow Bytes: 16936 (max 16936) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 48 (max 97)
Successful lookaside attempts: 116
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 13608 bytes
Page cache hits: 4
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 856 bytes
Statement Heap/Lookaside Usage: 2304 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 30
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2304
Bytes received by read(): 7856
Bytes sent to write(): 0
Read() system calls: 14
Write() system calls: 0
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 77112 (max 82744) bytes
Number of Outstanding Allocations: 161 (max 186)
Number of Pcache Overflow Bytes: 16936 (max 16936) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 61 (max 97)
Successful lookaside attempts: 154
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 13608 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 864 bytes
Statement Heap/Lookaside Usage: 4880 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 32
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 4880
Bytes received by read(): 7950
Bytes sent to write(): 1331
Read() system calls: 16
Write() system calls: 1
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 84096 (max 89728) bytes
Number of Outstanding Allocations: 182 (max 197)
Number of Pcache Overflow Bytes: 21304 (max 21304) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 48 (max 97)
Successful lookaside attempts: 222
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17960 bytes
Page cache hits: 4
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1128 bytes
Statement Heap/Lookaside Usage: 2352 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 28
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2352
Bytes received by read(): 8047
Bytes sent to write(): 2665
Read() system calls: 18
Write() system calls: 2
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81752 (max 89728) bytes
Number of Outstanding Allocations: 171 (max 197)
Number of Pcache Overflow Bytes: 21304 (max 21304) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 57 (max 97)
Successful lookaside attempts: 244
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17960 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1136 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 8144
Bytes sent to write(): 4000
Read() system calls: 20
Write() system calls: 3
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81752 (max 89728) bytes
Number of Outstanding Allocations: 171 (max 197)
Number of Pcache Overflow Bytes: 21304 (max 21304) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 57 (max 97)
Successful lookaside attempts: 266
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17960 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1136 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 8241
Bytes sent to write(): 5335
Read() system calls: 22
Write() system calls: 4
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 81752 (max 89728) bytes
Number of Outstanding Allocations: 171 (max 197)
Number of Pcache Overflow Bytes: 21304 (max 21304) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 57 (max 97)
Successful lookaside attempts: 288
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 17960 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1136 bytes
Statement Heap/Lookaside Usage: 3296 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 16
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 3296
Bytes received by read(): 8338
Bytes sent to write(): 6670
Read() system calls: 24
Write() system calls: 5
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 88968 (max 98696) bytes
Number of Outstanding Allocations: 189 (max 201)
Number of Pcache Overflow Bytes: 25672 (max 25672) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 48 (max 101)
Successful lookaside attempts: 361
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22312 bytes
Page cache hits: 5
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1344 bytes
Statement Heap/Lookaside Usage: 2576 bytes
Fullscan Steps: 0
Sort Operations: 1
Autoindex Inserts: 0
Virtual Machine Steps: 56
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2576
Bytes received by read(): 8435
Bytes sent to write(): 8005
Read() system calls: 26
Write() system calls: 6
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Memory Used: 86328 (max 98696) bytes
Number of Outstanding Allocations: 174 (max 201)
Number of Pcache Overflow Bytes: 25672 (max 25672) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 51 (max 101)
Successful lookaside attempts: 366
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22312 bytes
Page cache hits: 0
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1344 bytes
Statement Heap/Lookaside Usage: 2528 bytes
Fullscan Steps: 0
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 5
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 2528
Bytes received by read(): 8532
Bytes sent to write(): 9341
Read() system calls: 28
Write() system calls: 7
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
CREATE TABLE "t2"("b","c","_ROWID_",PRIMARY KEY("b","c","_ROWID_"))WITHOUT ROWID;
Braun|30|3
Wernher|10|1
von|20|2
Memory Used: 86808 (max 98696) bytes
Number of Outstanding Allocations: 184 (max 201)
Number of Pcache Overflow Bytes: 25672 (max 25672) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 58 (max 102)
Successful lookaside attempts: 479
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22312 bytes
Page cache hits: 5
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1824 bytes
Statement Heap/Lookaside Usage: 4368 bytes
Fullscan Steps: 2
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 21
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 4368
Bytes received by read(): 8629
Bytes sent to write(): 10758
Read() system calls: 30
Write() system calls: 9
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
Braun|30
Wernher|10
von|20
Memory Used: 86816 (max 98696) bytes
Number of Outstanding Allocations: 185 (max 201)
Number of Pcache Overflow Bytes: 25672 (max 25672) bytes
Largest Allocation: 48000 bytes
Largest Pcache Allocation: 4368 bytes
Lookaside Slots Used: 59 (max 102)
Successful lookaside attempts: 516
Lookaside failures due to size: 0
Lookaside failures due to OOM: 0
Pager Heap Usage: 22312 bytes
Page cache hits: 2
Page cache misses: 0
Page cache writes: 0
Page cache spills: 0
Temporary data spilled to disk: 0
Schema Heap Usage: 1832 bytes
Statement Heap/Lookaside Usage: 4496 bytes
Fullscan Steps: 2
Sort Operations: 0
Autoindex Inserts: 0
Virtual Machine Steps: 19
Reprepare operations: 0
Number of times run: 1
Memory used by prepared stmt: 4496
Bytes received by read(): 8727
Bytes sent to write(): 12128
Read() system calls: 32
Write() system calls: 10
Bytes read from storage: 0
Bytes written to storage: 0
Cancelled write bytes: 0
```
## Flag
```
```