## Summary **No review yet** ## Minimized query ```sql PRAGMA legacy_alter_table = ON; PRAGMA empty_result_callbacks = TRUE; ATTACH DATABASE ':memory:' AS aux12; PRAGMA vdbe_addoptrace = FALSE; .imposter off PRAGMA synchronous; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; .stats CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z"); DROP TABLE t0; VACUUM main; VACUUM main; PRAGMA empty_result_callbacks = YES; DETACH DATABASE aux12; CREATE TABLE T1 ( A VARCHAR(20) PRIMARY KEY, X VARCHAR(10) UNIQUE ); CREATE TABLE T2 ( A VARCHAR(20) PRIMARY KEY, Y VARCHAR(10) UNIQUE ); INSERT INTO T1 VALUES ('a', 'm'); INSERT INTO T1 VALUES ('b', 'n'); INSERT INTO T1 VALUES ('c', 'o'); INSERT INTO T2 VALUES ('b', 'k'); INSERT INTO T2 VALUES ('c', 'l'); SELECT A FROM T1 INTERSECT SELECT A FROM T2; ALTER TABLE T2 RENAME COLUMN A TO A_r6452; ``` ## Actual output ```sql 2 Memory Used: 79920 (max 79960) bytes Number of Outstanding Allocations: 158 (max 159) Number of Pcache Overflow Bytes: 16928 (max 16928) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 80) Successful lookaside attempts: 260 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 2 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1104 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 7486 Bytes sent to write(): 2 Read() system calls: 13 Write() system calls: 1 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 78792 (max 343216) bytes Number of Outstanding Allocations: 131 (max 276) Number of Pcache Overflow Bytes: 16928 (max 63608) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 97) Successful lookaside attempts: 1372 Lookaside failures due to size: 6 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 56 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 7836 Bytes sent to write(): 1015 Read() system calls: 16 Write() system calls: 2 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 78792 (max 343232) bytes Number of Outstanding Allocations: 131 (max 280) Number of Pcache Overflow Bytes: 16928 (max 63608) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 97) Successful lookaside attempts: 2484 Lookaside failures due to size: 12 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 7933 Bytes sent to write(): 2031 Read() system calls: 18 Write() system calls: 3 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 78792 (max 343232) bytes Number of Outstanding Allocations: 131 (max 280) Number of Pcache Overflow Bytes: 16928 (max 63608) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 97) Successful lookaside attempts: 3596 Lookaside failures due to size: 18 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8030 Bytes sent to write(): 3048 Read() system calls: 20 Write() system calls: 4 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 78792 (max 343248) bytes Number of Outstanding Allocations: 131 (max 280) Number of Pcache Overflow Bytes: 16928 (max 63624) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 97) Successful lookaside attempts: 4708 Lookaside failures due to size: 24 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8127 Bytes sent to write(): 4065 Read() system calls: 22 Write() system calls: 5 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 78792 (max 343264) bytes Number of Outstanding Allocations: 131 (max 280) Number of Pcache Overflow Bytes: 16928 (max 63624) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 34 (max 97) Successful lookaside attempts: 5820 Lookaside failures due to size: 30 Lookaside failures due to OOM: 0 Pager Heap Usage: 18496 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8224 Bytes sent to write(): 5082 Read() system calls: 24 Write() system calls: 6 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 b c ``` ## Expectation ```sql 2 Memory Used: 80568 (max 80600) bytes Number of Outstanding Allocations: 168 (max 169) Number of Pcache Overflow Bytes: 16944 (max 16944) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 91) Successful lookaside attempts: 256 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 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: 944 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8262 Bytes sent to write(): 2 Read() system calls: 14 Write() system calls: 1 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 83720 (max 343728) bytes Number of Outstanding Allocations: 142 (max 279) Number of Pcache Overflow Bytes: 21040 (max 63648) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 105) Successful lookaside attempts: 1262 Lookaside failures due to size: 6 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 bytes Page cache hits: 56 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8400 Bytes sent to write(): 1053 Read() system calls: 17 Write() system calls: 2 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 83720 (max 343728) bytes Number of Outstanding Allocations: 142 (max 279) Number of Pcache Overflow Bytes: 21040 (max 63648) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 105) Successful lookaside attempts: 2268 Lookaside failures due to size: 12 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8497 Bytes sent to write(): 2109 Read() system calls: 19 Write() system calls: 3 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 83720 (max 343728) bytes Number of Outstanding Allocations: 142 (max 279) Number of Pcache Overflow Bytes: 21040 (max 63648) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 105) Successful lookaside attempts: 3274 Lookaside failures due to size: 18 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8594 Bytes sent to write(): 3166 Read() system calls: 21 Write() system calls: 4 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 83720 (max 343728) bytes Number of Outstanding Allocations: 142 (max 279) Number of Pcache Overflow Bytes: 21040 (max 63648) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 105) Successful lookaside attempts: 4280 Lookaside failures due to size: 24 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8691 Bytes sent to write(): 4223 Read() system calls: 23 Write() system calls: 5 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 83720 (max 343728) bytes Number of Outstanding Allocations: 142 (max 279) Number of Pcache Overflow Bytes: 21040 (max 63648) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 50 (max 105) Successful lookaside attempts: 5286 Lookaside failures due to size: 30 Lookaside failures due to OOM: 0 Pager Heap Usage: 18512 bytes Page cache hits: 59 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 0 bytes Bytes received by read(): 8788 Bytes sent to write(): 5280 Read() system calls: 25 Write() system calls: 6 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 b c ``` ## Flag ``` ```