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Make a hard copy of the results of a subquery lest the result of the

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subquery be referenced after a change to the table that generated the subquery
result.

FossilOrigin-Name: 9c0d80907b4dee8ee8f205c2ebdb759f5ba1d771
This commit is contained in:
drh
2015-05-18 04:24:27 +00:00
parent e655a0e34e
commit df553659ad
4 changed files with 25 additions and 10 deletions
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10
test/misc4.test
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@ -219,4 +219,14 @@ do_catchsql_test misc4-7.1 {
VACUUM;
} {1 {unrecognized token: "[M%s%s%s%s%s%s%s%s%s%s%s%s%s"}}
# 2015-05-18. Use of ephermeral Mem content after the cursor that holds
# the canonical content has moved on.
#
do_execsql_test misc4-7.2 {
CREATE TABLE t0(a,b);
INSERT INTO t0 VALUES(1,0),(2,0);
UPDATE t0 SET b=9 WHERE a AND (SELECT a FROM t0 WHERE a);
SELECT * FROM t0 ORDER BY +a;
} {1 9 2 9}
finish_test