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Fix LIMIT and OFFSET so that they work and do not leak memory even on

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complex queries involving deeply nested views of UNION ALL compounds.
Ticket [db4d96798da8].  Secondary to ticket [d58ccbb3f1b7].

FossilOrigin-Name: 497ee36cb8d07c936e6896135163c5cd7e94bdde
This commit is contained in:
drh
2013-01-29 23:55:50 +00:00
parent e096205a7f
commit 547180baf0
4 changed files with 165 additions and 8 deletions
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152
test/limit.test
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@ -468,5 +468,157 @@ do_test limit-12.4 {
}
} {1 {no such column: x}}
db close
sqlite3_shutdown
sqlite3_config_lookaside 0 0
sqlite3_initialize
sqlite3 db :memory:
# Ticket [db4d96798da8b]
# LIMIT does not work with nested views containing UNION ALL
#
do_test limit-13.1 {
db eval {
CREATE TABLE t13(x);
INSERT INTO t13 VALUES(1),(2);
CREATE VIEW v13a AS SELECT x AS y FROM t13;
CREATE VIEW v13b AS SELECT y AS z FROM v13a UNION ALL SELECT y+10 FROM v13a;
CREATE VIEW v13c AS SELECT z FROM v13b UNION ALL SELECT z+20 FROM v13b;
}
} {}
do_test limit-13.2 {
db eval {SELECT z FROM v13c LIMIT 1}
} {1}
do_test limit-13.3 {
db eval {SELECT z FROM v13c LIMIT 2}
} {1 2}
do_test limit-13.4 {
db eval {SELECT z FROM v13c LIMIT 3}
} {1 2 11}
do_test limit-13.5 {
db eval {SELECT z FROM v13c LIMIT 4}
} {1 2 11 12}
do_test limit-13.6 {
db eval {SELECT z FROM v13c LIMIT 5}
} {1 2 11 12 21}
do_test limit-13.7 {
db eval {SELECT z FROM v13c LIMIT 6}
} {1 2 11 12 21 22}
do_test limit-13.8 {
db eval {SELECT z FROM v13c LIMIT 7}
} {1 2 11 12 21 22 31}
do_test limit-13.9 {
db eval {SELECT z FROM v13c LIMIT 8}
} {1 2 11 12 21 22 31 32}
do_test limit-13.10 {
db eval {SELECT z FROM v13c LIMIT 9}
} {1 2 11 12 21 22 31 32}
do_test limit-13.11 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 1}
} {2}
do_test limit-13.12 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 1}
} {2 11}
do_test limit-13.13 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 1}
} {2 11 12}
do_test limit-13.14 {
db eval {SELECT z FROM v13c LIMIT 4 OFFSET 1}
} {2 11 12 21}
do_test limit-13.15 {
db eval {SELECT z FROM v13c LIMIT 5 OFFSET 1}
} {2 11 12 21 22}
do_test limit-13.16 {
db eval {SELECT z FROM v13c LIMIT 6 OFFSET 1}
} {2 11 12 21 22 31}
do_test limit-13.17 {
db eval {SELECT z FROM v13c LIMIT 7 OFFSET 1}
} {2 11 12 21 22 31 32}
do_test limit-13.18 {
db eval {SELECT z FROM v13c LIMIT 8 OFFSET 1}
} {2 11 12 21 22 31 32}
do_test limit-13.21 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 2}
} {11}
do_test limit-13.22 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 2}
} {11 12}
do_test limit-13.23 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 2}
} {11 12 21}
do_test limit-13.24 {
db eval {SELECT z FROM v13c LIMIT 4 OFFSET 2}
} {11 12 21 22}
do_test limit-13.25 {
db eval {SELECT z FROM v13c LIMIT 5 OFFSET 2}
} {11 12 21 22 31}
do_test limit-13.26 {
db eval {SELECT z FROM v13c LIMIT 6 OFFSET 2}
} {11 12 21 22 31 32}
do_test limit-13.27 {
db eval {SELECT z FROM v13c LIMIT 7 OFFSET 2}
} {11 12 21 22 31 32}
do_test limit-13.31 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 3}
} {12}
do_test limit-13.32 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 3}
} {12 21}
do_test limit-13.33 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 3}
} {12 21 22}
do_test limit-13.34 {
db eval {SELECT z FROM v13c LIMIT 4 OFFSET 3}
} {12 21 22 31}
do_test limit-13.35 {
db eval {SELECT z FROM v13c LIMIT 5 OFFSET 3}
} {12 21 22 31 32}
do_test limit-13.36 {
db eval {SELECT z FROM v13c LIMIT 6 OFFSET 3}
} {12 21 22 31 32}
do_test limit-13.41 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 4}
} {21}
do_test limit-13.42 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 4}
} {21 22}
do_test limit-13.43 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 4}
} {21 22 31}
do_test limit-13.44 {
db eval {SELECT z FROM v13c LIMIT 4 OFFSET 4}
} {21 22 31 32}
do_test limit-13.45 {
db eval {SELECT z FROM v13c LIMIT 5 OFFSET 4}
} {21 22 31 32}
do_test limit-13.51 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 5}
} {22}
do_test limit-13.52 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 5}
} {22 31}
do_test limit-13.53 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 5}
} {22 31 32}
do_test limit-13.54 {
db eval {SELECT z FROM v13c LIMIT 4 OFFSET 5}
} {22 31 32}
do_test limit-13.61 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 6}
} {31}
do_test limit-13.62 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 6}
} {31 32}
do_test limit-13.63 {
db eval {SELECT z FROM v13c LIMIT 3 OFFSET 6}
} {31 32}
do_test limit-13.71 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 7}
} {32}
do_test limit-13.72 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 7}
} {32}
do_test limit-13.81 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 8}
} {}
finish_test