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ast-project/part1/results/1/bug_7f1077d3-be99-4451-80c3-aacc7d7fcd8c_logic.md
2026-06-24 13:47:14 +02:00

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Summary

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Minimized query

.width
ATTACH DATABASE ':memory:' AS aux68;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c INT, d INT);
INSERT INTO t1 VALUES (NULL, '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
CREATE TABLE T (
  a INTEGER,
  b REAL
);
INSERT INTO T VALUES (1,1.5), (2,-7.25), (3,0.0);
SELECT a,b FROM T WHERE a >= 2 ORDER BY b;
ANALYZE T;
SELECT COUNT(*) FILTER (WHERE b IS NOT NULL), SUM(rowid) FILTER (WHERE b > 0), COUNT(*) FILTER (WHERE 1=0), COUNT(*) FILTER (WHERE 1=1), COUNT(*) FILTER (WHERE NULL), AVG(b) FILTER (WHERE b > 0 AND b < 100), COUNT(*) FILTER (WHERE typeof(b) = "text") FROM T;
DETACH DATABASE aux68;
SELECT COUNT(*) FILTER (WHERE b IS NOT NULL), SUM(rowid) FILTER (WHERE b > 0), COUNT(*) FILTER (WHERE 1=0), COUNT(*) FILTER (WHERE 1=1), COUNT(*) FILTER (WHERE NULL), AVG(b) FILTER (WHERE b > 0 AND b < 100), COUNT(*) FILTER (WHERE typeof(b) = "text") FROM T;
SELECT MIN(b) OVER (PARTITION BY b ORDER BY b ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM t1;

SELECT COUNT(*) FROM t1;

Actual output

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
Braun|30
Wernher|10
von|20

Expectation

CREATE TABLE "t2"("b","c","_ROWID_",PRIMARY KEY("b","c","_ROWID_"))WITHOUT ROWID;
Braun|30|3
Wernher|10|1
von|20|2
Braun|30
Wernher|10
von|20

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