/trunk/test/eqp.test |
@@ -0,0 +1,578 @@ |
# 2010 November 6 |
# |
# The author disclaims copyright to this source code. In place of |
# a legal notice, here is a blessing: |
# |
# May you do good and not evil. |
# May you find forgiveness for yourself and forgive others. |
# May you share freely, never taking more than you give. |
# |
#*********************************************************************** |
# |
|
set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
|
set testprefix eqp |
|
#------------------------------------------------------------------------- |
# |
# eqp-1.*: Assorted tests. |
# eqp-2.*: Tests for single select statements. |
# eqp-3.*: Select statements that execute sub-selects. |
# eqp-4.*: Compound select statements. |
# ... |
# eqp-7.*: "SELECT count(*) FROM tbl" statements (VDBE code OP_Count). |
# |
|
proc det {args} { uplevel do_eqp_test $args } |
|
do_execsql_test 1.1 { |
CREATE TABLE t1(a, b); |
CREATE INDEX i1 ON t1(a); |
CREATE INDEX i2 ON t1(b); |
CREATE TABLE t2(a, b); |
CREATE TABLE t3(a, b); |
} |
|
do_eqp_test 1.2 { |
SELECT * FROM t2, t1 WHERE t1.a=1 OR t1.b=2; |
} { |
0 0 1 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~10 rows)} |
0 0 1 {SEARCH TABLE t1 USING INDEX i2 (b=?) (~10 rows)} |
0 1 0 {SCAN TABLE t2 (~1000000 rows)} |
} |
do_eqp_test 1.3 { |
SELECT * FROM t2 CROSS JOIN t1 WHERE t1.a=1 OR t1.b=2; |
} { |
0 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 1 1 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~10 rows)} |
0 1 1 {SEARCH TABLE t1 USING INDEX i2 (b=?) (~10 rows)} |
} |
do_eqp_test 1.3 { |
SELECT a FROM t1 ORDER BY a |
} { |
0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1 (~1000000 rows)} |
} |
do_eqp_test 1.4 { |
SELECT a FROM t1 ORDER BY +a |
} { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
do_eqp_test 1.5 { |
SELECT a FROM t1 WHERE a=4 |
} { |
0 0 0 {SEARCH TABLE t1 USING COVERING INDEX i1 (a=?) (~10 rows)} |
} |
do_eqp_test 1.6 { |
SELECT DISTINCT count(*) FROM t3 GROUP BY a; |
} { |
0 0 0 {SCAN TABLE t3 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR GROUP BY} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
} |
|
do_eqp_test 1.7 { |
SELECT * FROM t3 JOIN (SELECT 1) |
} { |
0 0 1 {SCAN SUBQUERY 1 (~1 rows)} |
0 1 0 {SCAN TABLE t3 (~1000000 rows)} |
} |
do_eqp_test 1.8 { |
SELECT * FROM t3 JOIN (SELECT 1 UNION SELECT 2) |
} { |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 USING TEMP B-TREE (UNION)} |
0 0 1 {SCAN SUBQUERY 1 (~2 rows)} |
0 1 0 {SCAN TABLE t3 (~1000000 rows)} |
} |
do_eqp_test 1.9 { |
SELECT * FROM t3 JOIN (SELECT 1 EXCEPT SELECT a FROM t3 LIMIT 17) |
} { |
3 0 0 {SCAN TABLE t3 (~1000000 rows)} |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 USING TEMP B-TREE (EXCEPT)} |
0 0 1 {SCAN SUBQUERY 1 (~17 rows)} |
0 1 0 {SCAN TABLE t3 (~1000000 rows)} |
} |
do_eqp_test 1.10 { |
SELECT * FROM t3 JOIN (SELECT 1 INTERSECT SELECT a FROM t3 LIMIT 17) |
} { |
3 0 0 {SCAN TABLE t3 (~1000000 rows)} |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 USING TEMP B-TREE (INTERSECT)} |
0 0 1 {SCAN SUBQUERY 1 (~1 rows)} |
0 1 0 {SCAN TABLE t3 (~1000000 rows)} |
} |
|
do_eqp_test 1.11 { |
SELECT * FROM t3 JOIN (SELECT 1 UNION ALL SELECT a FROM t3 LIMIT 17) |
} { |
3 0 0 {SCAN TABLE t3 (~1000000 rows)} |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 (UNION ALL)} |
0 0 1 {SCAN SUBQUERY 1 (~17 rows)} |
0 1 0 {SCAN TABLE t3 (~1000000 rows)} |
} |
|
#------------------------------------------------------------------------- |
# Test cases eqp-2.* - tests for single select statements. |
# |
drop_all_tables |
do_execsql_test 2.1 { |
CREATE TABLE t1(x, y); |
|
CREATE TABLE t2(x, y); |
CREATE INDEX t2i1 ON t2(x); |
} |
|
det 2.2.1 "SELECT DISTINCT min(x), max(x) FROM t1 GROUP BY x ORDER BY 1" { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR GROUP BY} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
det 2.2.2 "SELECT DISTINCT min(x), max(x) FROM t2 GROUP BY x ORDER BY 1" { |
0 0 0 {SCAN TABLE t2 USING COVERING INDEX t2i1 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
det 2.2.3 "SELECT DISTINCT * FROM t1" { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
} |
det 2.2.4 "SELECT DISTINCT * FROM t1, t2" { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 1 1 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
} |
det 2.2.5 "SELECT DISTINCT * FROM t1, t2 ORDER BY t1.x" { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 1 1 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR DISTINCT} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
det 2.2.6 "SELECT DISTINCT t2.x FROM t1, t2 ORDER BY t2.x" { |
0 0 1 {SCAN TABLE t2 USING COVERING INDEX t2i1 (~1000000 rows)} |
0 1 0 {SCAN TABLE t1 (~1000000 rows)} |
} |
|
det 2.3.1 "SELECT max(x) FROM t2" { |
0 0 0 {SEARCH TABLE t2 USING COVERING INDEX t2i1 (~1 rows)} |
} |
det 2.3.2 "SELECT min(x) FROM t2" { |
0 0 0 {SEARCH TABLE t2 USING COVERING INDEX t2i1 (~1 rows)} |
} |
det 2.3.3 "SELECT min(x), max(x) FROM t2" { |
0 0 0 {SCAN TABLE t2 (~1000000 rows)} |
} |
|
det 2.4.1 "SELECT * FROM t1 WHERE rowid=?" { |
0 0 0 {SEARCH TABLE t1 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} |
} |
|
|
|
#------------------------------------------------------------------------- |
# Test cases eqp-3.* - tests for select statements that use sub-selects. |
# |
do_eqp_test 3.1.1 { |
SELECT (SELECT x FROM t1 AS sub) FROM t1; |
} { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {EXECUTE SCALAR SUBQUERY 1} |
1 0 0 {SCAN TABLE t1 AS sub (~1000000 rows)} |
} |
do_eqp_test 3.1.2 { |
SELECT * FROM t1 WHERE (SELECT x FROM t1 AS sub); |
} { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {EXECUTE SCALAR SUBQUERY 1} |
1 0 0 {SCAN TABLE t1 AS sub (~1000000 rows)} |
} |
do_eqp_test 3.1.3 { |
SELECT * FROM t1 WHERE (SELECT x FROM t1 AS sub ORDER BY y); |
} { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {EXECUTE SCALAR SUBQUERY 1} |
1 0 0 {SCAN TABLE t1 AS sub (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
do_eqp_test 3.1.4 { |
SELECT * FROM t1 WHERE (SELECT x FROM t2 ORDER BY x); |
} { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {EXECUTE SCALAR SUBQUERY 1} |
1 0 0 {SCAN TABLE t2 USING COVERING INDEX t2i1 (~1000000 rows)} |
} |
|
det 3.2.1 { |
SELECT * FROM (SELECT * FROM t1 ORDER BY x LIMIT 10) ORDER BY y LIMIT 5 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {SCAN SUBQUERY 1 (~10 rows)} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
det 3.2.2 { |
SELECT * FROM |
(SELECT * FROM t1 ORDER BY x LIMIT 10) AS x1, |
(SELECT * FROM t2 ORDER BY x LIMIT 10) AS x2 |
ORDER BY x2.y LIMIT 5 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 USING INDEX t2i1 (~1000000 rows)} |
0 0 0 {SCAN SUBQUERY 1 AS x1 (~10 rows)} |
0 1 1 {SCAN SUBQUERY 2 AS x2 (~10 rows)} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
|
det 3.3.1 { |
SELECT * FROM t1 WHERE y IN (SELECT y FROM t2) |
} { |
0 0 0 {SCAN TABLE t1 (~100000 rows)} |
0 0 0 {EXECUTE LIST SUBQUERY 1} |
1 0 0 {SCAN TABLE t2 (~1000000 rows)} |
} |
det 3.3.2 { |
SELECT * FROM t1 WHERE y IN (SELECT y FROM t2 WHERE t1.x!=t2.x) |
} { |
0 0 0 {SCAN TABLE t1 (~500000 rows)} |
0 0 0 {EXECUTE CORRELATED LIST SUBQUERY 1} |
1 0 0 {SCAN TABLE t2 (~500000 rows)} |
} |
det 3.3.3 { |
SELECT * FROM t1 WHERE EXISTS (SELECT y FROM t2 WHERE t1.x!=t2.x) |
} { |
0 0 0 {SCAN TABLE t1 (~500000 rows)} |
0 0 0 {EXECUTE CORRELATED SCALAR SUBQUERY 1} |
1 0 0 {SCAN TABLE t2 (~500000 rows)} |
} |
|
#------------------------------------------------------------------------- |
# Test cases eqp-4.* - tests for composite select statements. |
# |
do_eqp_test 4.1.1 { |
SELECT * FROM t1 UNION ALL SELECT * FROM t2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (UNION ALL)} |
} |
do_eqp_test 4.1.2 { |
SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY 2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (UNION ALL)} |
} |
do_eqp_test 4.1.3 { |
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY 2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (UNION)} |
} |
do_eqp_test 4.1.4 { |
SELECT * FROM t1 INTERSECT SELECT * FROM t2 ORDER BY 2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (INTERSECT)} |
} |
do_eqp_test 4.1.5 { |
SELECT * FROM t1 EXCEPT SELECT * FROM t2 ORDER BY 2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (EXCEPT)} |
} |
|
do_eqp_test 4.2.2 { |
SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY 1 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 USING INDEX t2i1 (~1000000 rows)} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (UNION ALL)} |
} |
do_eqp_test 4.2.3 { |
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY 1 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (UNION)} |
} |
do_eqp_test 4.2.4 { |
SELECT * FROM t1 INTERSECT SELECT * FROM t2 ORDER BY 1 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (INTERSECT)} |
} |
do_eqp_test 4.2.5 { |
SELECT * FROM t1 EXCEPT SELECT * FROM t2 ORDER BY 1 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
1 0 0 {USE TEMP B-TREE FOR ORDER BY} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (EXCEPT)} |
} |
|
do_eqp_test 4.3.1 { |
SELECT x FROM t1 UNION SELECT x FROM t2 |
} { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 USING TEMP B-TREE (UNION)} |
} |
|
do_eqp_test 4.3.2 { |
SELECT x FROM t1 UNION SELECT x FROM t2 UNION SELECT x FROM t1 |
} { |
2 0 0 {SCAN TABLE t1 (~1000000 rows)} |
3 0 0 {SCAN TABLE t2 (~1000000 rows)} |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 USING TEMP B-TREE (UNION)} |
4 0 0 {SCAN TABLE t1 (~1000000 rows)} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 4 USING TEMP B-TREE (UNION)} |
} |
do_eqp_test 4.3.3 { |
SELECT x FROM t1 UNION SELECT x FROM t2 UNION SELECT x FROM t1 ORDER BY 1 |
} { |
2 0 0 {SCAN TABLE t1 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
3 0 0 {SCAN TABLE t2 USING COVERING INDEX t2i1 (~1000000 rows)} |
1 0 0 {COMPOUND SUBQUERIES 2 AND 3 (UNION)} |
4 0 0 {SCAN TABLE t1 (~1000000 rows)} |
4 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 4 (UNION)} |
} |
|
#------------------------------------------------------------------------- |
# This next block of tests verifies that the examples on the |
# lang_explain.html page are correct. |
# |
drop_all_tables |
|
# EVIDENCE-OF: R-64208-08323 sqlite> EXPLAIN QUERY PLAN SELECT a, b |
# FROM t1 WHERE a=1; 0|0|0|SCAN TABLE t1 (~100000 rows) |
do_execsql_test 5.1.0 { CREATE TABLE t1(a, b) } |
det 5.1.1 "SELECT a, b FROM t1 WHERE a=1" { |
0 0 0 {SCAN TABLE t1 (~100000 rows)} |
} |
|
# EVIDENCE-OF: R-09022-44606 sqlite> CREATE INDEX i1 ON t1(a); |
# sqlite> EXPLAIN QUERY PLAN SELECT a, b FROM t1 WHERE a=1; |
# 0|0|0|SEARCH TABLE t1 USING INDEX i1 (a=?) (~10 rows) |
do_execsql_test 5.2.0 { CREATE INDEX i1 ON t1(a) } |
det 5.2.1 "SELECT a, b FROM t1 WHERE a=1" { |
0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?) (~10 rows)} |
} |
|
# EVIDENCE-OF: R-62228-34103 sqlite> CREATE INDEX i2 ON t1(a, b); |
# sqlite> EXPLAIN QUERY PLAN SELECT a, b FROM t1 WHERE a=1; |
# 0|0|0|SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows) |
do_execsql_test 5.3.0 { CREATE INDEX i2 ON t1(a, b) } |
det 5.3.1 "SELECT a, b FROM t1 WHERE a=1" { |
0 0 0 {SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows)} |
} |
|
# EVIDENCE-OF: R-22253-05302 sqlite> EXPLAIN QUERY PLAN SELECT t1.*, |
# t2.* FROM t1, t2 WHERE t1.a=1 AND t1.b>2; 0|0|0|SEARCH TABLE t1 |
# USING COVERING INDEX i2 (a=? AND b>?) (~3 rows) 0|1|1|SCAN TABLE t2 |
# (~1000000 rows) |
do_execsql_test 5.4.0 {CREATE TABLE t2(c, d)} |
det 5.4.1 "SELECT t1.*, t2.* FROM t1, t2 WHERE t1.a=1 AND t1.b>2" { |
0 0 0 {SEARCH TABLE t1 USING COVERING INDEX i2 (a=? AND b>?) (~2 rows)} |
0 1 1 {SCAN TABLE t2 (~1000000 rows)} |
} |
|
# EVIDENCE-OF: R-21040-07025 sqlite> EXPLAIN QUERY PLAN SELECT t1.*, |
# t2.* FROM t2, t1 WHERE t1.a=1 AND t1.b>2; 0|0|1|SEARCH TABLE t1 |
# USING COVERING INDEX i2 (a=? AND b>?) (~3 rows) 0|1|0|SCAN TABLE t2 |
# (~1000000 rows) |
det 5.5 "SELECT t1.*, t2.* FROM t2, t1 WHERE t1.a=1 AND t1.b>2" { |
0 0 1 {SEARCH TABLE t1 USING COVERING INDEX i2 (a=? AND b>?) (~2 rows)} |
0 1 0 {SCAN TABLE t2 (~1000000 rows)} |
} |
|
# EVIDENCE-OF: R-39007-61103 sqlite> CREATE INDEX i3 ON t1(b); |
# sqlite> EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=1 OR b=2; |
# 0|0|0|SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows) |
# 0|0|0|SEARCH TABLE t1 USING INDEX i3 (b=?) (~10 rows) |
do_execsql_test 5.5.0 {CREATE INDEX i3 ON t1(b)} |
det 5.6.1 "SELECT * FROM t1 WHERE a=1 OR b=2" { |
0 0 0 {SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows)} |
0 0 0 {SEARCH TABLE t1 USING INDEX i3 (b=?) (~10 rows)} |
} |
|
# EVIDENCE-OF: R-33025-54904 sqlite> EXPLAIN QUERY PLAN SELECT c, d |
# FROM t2 ORDER BY c; 0|0|0|SCAN TABLE t2 (~1000000 rows) 0|0|0|USE TEMP |
# B-TREE FOR ORDER BY |
det 5.7 "SELECT c, d FROM t2 ORDER BY c" { |
0 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {USE TEMP B-TREE FOR ORDER BY} |
} |
|
# EVIDENCE-OF: R-38854-22809 sqlite> CREATE INDEX i4 ON t2(c); |
# sqlite> EXPLAIN QUERY PLAN SELECT c, d FROM t2 ORDER BY c; |
# 0|0|0|SCAN TABLE t2 USING INDEX i4 (~1000000 rows) |
do_execsql_test 5.8.0 {CREATE INDEX i4 ON t2(c)} |
det 5.8.1 "SELECT c, d FROM t2 ORDER BY c" { |
0 0 0 {SCAN TABLE t2 USING INDEX i4 (~1000000 rows)} |
} |
|
# EVIDENCE-OF: R-29884-43993 sqlite> EXPLAIN QUERY PLAN SELECT |
# (SELECT b FROM t1 WHERE a=0), (SELECT a FROM t1 WHERE b=t2.c) FROM t2; |
# 0|0|0|SCAN TABLE t2 (~1000000 rows) 0|0|0|EXECUTE SCALAR SUBQUERY 1 |
# 1|0|0|SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows) |
# 0|0|0|EXECUTE CORRELATED SCALAR SUBQUERY 2 2|0|0|SEARCH TABLE t1 USING |
# INDEX i3 (b=?) (~10 rows) |
det 5.9 { |
SELECT (SELECT b FROM t1 WHERE a=0), (SELECT a FROM t1 WHERE b=t2.c) FROM t2 |
} { |
0 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {EXECUTE SCALAR SUBQUERY 1} |
1 0 0 {SEARCH TABLE t1 USING COVERING INDEX i2 (a=?) (~10 rows)} |
0 0 0 {EXECUTE CORRELATED SCALAR SUBQUERY 2} |
2 0 0 {SEARCH TABLE t1 USING INDEX i3 (b=?) (~10 rows)} |
} |
|
# EVIDENCE-OF: R-17911-16445 sqlite> EXPLAIN QUERY PLAN SELECT |
# count(*) FROM (SELECT max(b) AS x FROM t1 GROUP BY a) GROUP BY x; |
# 1|0|0|SCAN TABLE t1 USING COVERING INDEX i2 (~1000000 rows) 0|0|0|SCAN |
# SUBQUERY 1 (~1000000 rows) 0|0|0|USE TEMP B-TREE FOR GROUP BY |
det 5.10 { |
SELECT count(*) FROM (SELECT max(b) AS x FROM t1 GROUP BY a) GROUP BY x |
} { |
1 0 0 {SCAN TABLE t1 USING COVERING INDEX i2 (~1000000 rows)} |
0 0 0 {SCAN SUBQUERY 1 (~100 rows)} |
0 0 0 {USE TEMP B-TREE FOR GROUP BY} |
} |
|
# EVIDENCE-OF: R-18544-33103 sqlite> EXPLAIN QUERY PLAN SELECT * FROM |
# (SELECT * FROM t2 WHERE c=1), t1; 0|0|0|SEARCH TABLE t2 USING INDEX i4 |
# (c=?) (~10 rows) 0|1|1|SCAN TABLE t1 (~1000000 rows) |
det 5.11 "SELECT * FROM (SELECT * FROM t2 WHERE c=1), t1" { |
0 0 0 {SEARCH TABLE t2 USING INDEX i4 (c=?) (~10 rows)} |
0 1 1 {SCAN TABLE t1 (~1000000 rows)} |
} |
|
# EVIDENCE-OF: R-40701-42164 sqlite> EXPLAIN QUERY PLAN SELECT a FROM |
# t1 UNION SELECT c FROM t2; 1|0|0|SCAN TABLE t1 (~1000000 rows) |
# 2|0|0|SCAN TABLE t2 (~1000000 rows) 0|0|0|COMPOUND SUBQUERIES 1 AND 2 |
# USING TEMP B-TREE (UNION) |
det 5.12 "SELECT a FROM t1 UNION SELECT c FROM t2" { |
1 0 0 {SCAN TABLE t1 (~1000000 rows)} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 USING TEMP B-TREE (UNION)} |
} |
|
# EVIDENCE-OF: R-61538-24748 sqlite> EXPLAIN QUERY PLAN SELECT a FROM |
# t1 EXCEPT SELECT d FROM t2 ORDER BY 1; 1|0|0|SCAN TABLE t1 USING |
# COVERING INDEX i2 (~1000000 rows) 2|0|0|SCAN TABLE t2 (~1000000 rows) |
# 2|0|0|USE TEMP B-TREE FOR ORDER BY 0|0|0|COMPOUND SUBQUERIES 1 AND 2 |
# (EXCEPT) |
det 5.13 "SELECT a FROM t1 EXCEPT SELECT d FROM t2 ORDER BY 1" { |
1 0 0 {SCAN TABLE t1 USING COVERING INDEX i2 (~1000000 rows)} |
2 0 0 {SCAN TABLE t2 (~1000000 rows)} |
2 0 0 {USE TEMP B-TREE FOR ORDER BY} |
0 0 0 {COMPOUND SUBQUERIES 1 AND 2 (EXCEPT)} |
} |
|
if 0 { |
#------------------------------------------------------------------------- |
# The following tests - eqp-6.* - test that the example C code on |
# documentation page eqp.html works. The C code is duplicated in test1.c |
# and wrapped in Tcl command [print_explain_query_plan] |
# |
set boilerplate { |
proc explain_query_plan {db sql} { |
set stmt [sqlite3_prepare_v2 db $sql -1 DUMMY] |
print_explain_query_plan $stmt |
sqlite3_finalize $stmt |
} |
sqlite3 db test.db |
explain_query_plan db {%SQL%} |
db close |
exit |
} |
|
# Do a "Print Explain Query Plan" test. |
proc do_peqp_test {tn sql res} { |
set fd [open script.tcl w] |
puts $fd [string map [list %SQL% $sql] $::boilerplate] |
close $fd |
|
uplevel do_test $tn [list { |
set fd [open "|[info nameofexec] script.tcl"] |
set data [read $fd] |
close $fd |
set data |
}] [list $res] |
} |
|
do_peqp_test 6.1 { |
SELECT a FROM t1 EXCEPT SELECT d FROM t2 ORDER BY 1 |
} [string trimleft { |
1 0 0 SCAN TABLE t1 USING COVERING INDEX i2 (~1000000 rows) |
2 0 0 SCAN TABLE t2 (~1000000 rows) |
2 0 0 USE TEMP B-TREE FOR ORDER BY |
0 0 0 COMPOUND SUBQUERIES 1 AND 2 (EXCEPT) |
}] |
} |
#------------------------------------------------------------------------- |
# The following tests - eqp-7.* - test that queries that use the OP_Count |
# optimization return something sensible with EQP. |
# |
drop_all_tables |
|
do_execsql_test 7.0 { |
CREATE TABLE t1(a, b); |
CREATE TABLE t2(a, b); |
CREATE INDEX i1 ON t2(a); |
} |
|
det 7.1 "SELECT count(*) FROM t1" { |
0 0 0 {SCAN TABLE t1 (~1000000 rows)} |
} |
|
det 7.2 "SELECT count(*) FROM t2" { |
0 0 0 {SCAN TABLE t2 USING COVERING INDEX i1(~1000000 rows)} |
} |
|
do_execsql_test 7.3 { |
INSERT INTO t1 VALUES(1, 2); |
INSERT INTO t1 VALUES(3, 4); |
|
INSERT INTO t2 VALUES(1, 2); |
INSERT INTO t2 VALUES(3, 4); |
INSERT INTO t2 VALUES(5, 6); |
|
ANALYZE; |
} |
|
db close |
sqlite3 db test.db |
|
det 7.4 "SELECT count(*) FROM t1" { |
0 0 0 {SCAN TABLE t1 (~2 rows)} |
} |
|
det 7.5 "SELECT count(*) FROM t2" { |
0 0 0 {SCAN TABLE t2 USING COVERING INDEX i1(~3 rows)} |
} |
|
|
finish_test |