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+# 2014 January 11
+#
+# 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.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. The
+# focus of this file is testing the WITH clause.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix with1
+
+ifcapable {!cte} {
+ finish_test
+ return
+}
+
+do_execsql_test 1.0 {
+ CREATE TABLE t1(x INTEGER, y INTEGER);
+ WITH x(a) AS ( SELECT * FROM t1) SELECT 10
+} {10}
+
+do_execsql_test 1.1 {
+ SELECT * FROM ( WITH x AS ( SELECT * FROM t1) SELECT 10 );
+} {10}
+
+do_execsql_test 1.2 {
+ WITH x(a) AS ( SELECT * FROM t1) INSERT INTO t1 VALUES(1,2);
+} {}
+
+do_execsql_test 1.3 {
+ WITH x(a) AS ( SELECT * FROM t1) DELETE FROM t1;
+} {}
+
+do_execsql_test 1.4 {
+ WITH x(a) AS ( SELECT * FROM t1) UPDATE t1 SET x = y;
+} {}
+
+#--------------------------------------------------------------------------
+
+do_execsql_test 2.1 {
+ DROP TABLE IF EXISTS t1;
+ CREATE TABLE t1(x);
+ INSERT INTO t1 VALUES(1);
+ INSERT INTO t1 VALUES(2);
+ WITH tmp AS ( SELECT * FROM t1 ) SELECT x FROM tmp;
+} {1 2}
+
+do_execsql_test 2.2 {
+ WITH tmp(a) AS ( SELECT * FROM t1 ) SELECT a FROM tmp;
+} {1 2}
+
+do_execsql_test 2.3 {
+ SELECT * FROM (
+ WITH tmp(a) AS ( SELECT * FROM t1 ) SELECT a FROM tmp
+ );
+} {1 2}
+
+do_execsql_test 2.4 {
+ WITH tmp1(a) AS ( SELECT * FROM t1 ),
+ tmp2(x) AS ( SELECT * FROM tmp1)
+ SELECT * FROM tmp2;
+} {1 2}
+
+do_execsql_test 2.5 {
+ WITH tmp2(x) AS ( SELECT * FROM tmp1),
+ tmp1(a) AS ( SELECT * FROM t1 )
+ SELECT * FROM tmp2;
+} {1 2}
+
+#-------------------------------------------------------------------------
+do_catchsql_test 3.1 {
+ WITH tmp2(x) AS ( SELECT * FROM tmp1 ),
+ tmp1(a) AS ( SELECT * FROM tmp2 )
+ SELECT * FROM tmp1;
+} {1 {circular reference: tmp1}}
+
+do_catchsql_test 3.2 {
+ CREATE TABLE t2(x INTEGER);
+ WITH tmp(a) AS (SELECT * FROM t1),
+ tmp(a) AS (SELECT * FROM t1)
+ SELECT * FROM tmp;
+} {1 {duplicate WITH table name: tmp}}
+
+do_execsql_test 3.3 {
+ CREATE TABLE t3(x);
+ CREATE TABLE t4(x);
+
+ INSERT INTO t3 VALUES('T3');
+ INSERT INTO t4 VALUES('T4');
+
+ WITH t3(a) AS (SELECT * FROM t4)
+ SELECT * FROM t3;
+} {T4}
+
+do_execsql_test 3.4 {
+ WITH tmp AS ( SELECT * FROM t3 ),
+ tmp2 AS ( WITH tmp AS ( SELECT * FROM t4 ) SELECT * FROM tmp )
+ SELECT * FROM tmp2;
+} {T4}
+
+do_execsql_test 3.5 {
+ WITH tmp AS ( SELECT * FROM t3 ),
+ tmp2 AS ( WITH xxxx AS ( SELECT * FROM t4 ) SELECT * FROM tmp )
+ SELECT * FROM tmp2;
+} {T3}
+
+do_catchsql_test 3.6 {
+ WITH tmp AS ( SELECT * FROM t3 ),
+ SELECT * FROM tmp;
+} {1 {near "SELECT": syntax error}}
+
+#-------------------------------------------------------------------------
+do_execsql_test 4.1 {
+ DROP TABLE IF EXISTS t1;
+ CREATE TABLE t1(x);
+ INSERT INTO t1 VALUES(1);
+ INSERT INTO t1 VALUES(2);
+ INSERT INTO t1 VALUES(3);
+ INSERT INTO t1 VALUES(4);
+
+ WITH dset AS ( SELECT 2 UNION ALL SELECT 4 )
+ DELETE FROM t1 WHERE x IN dset;
+ SELECT * FROM t1;
+} {1 3}
+
+do_execsql_test 4.2 {
+ WITH iset AS ( SELECT 2 UNION ALL SELECT 4 )
+ INSERT INTO t1 SELECT * FROM iset;
+ SELECT * FROM t1;
+} {1 3 2 4}
+
+do_execsql_test 4.3 {
+ WITH uset(a, b) AS ( SELECT 2, 8 UNION ALL SELECT 4, 9 )
+ UPDATE t1 SET x = COALESCE( (SELECT b FROM uset WHERE a=x), x );
+ SELECT * FROM t1;
+} {1 3 8 9}
+
+#-------------------------------------------------------------------------
+#
+do_execsql_test 5.1 {
+ WITH i(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM i)
+ SELECT x FROM i LIMIT 10;
+} {1 2 3 4 5 6 7 8 9 10}
+
+do_catchsql_test 5.2 {
+ WITH i(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM i ORDER BY 1)
+ SELECT x FROM i LIMIT 10;
+} {0 {1 2 3 4 5 6 7 8 9 10}}
+
+do_execsql_test 5.2.1 {
+ CREATE TABLE edge(xfrom, xto, seq, PRIMARY KEY(xfrom, xto)) WITHOUT ROWID;
+ INSERT INTO edge VALUES(0, 1, 10);
+ INSERT INTO edge VALUES(1, 2, 20);
+ INSERT INTO edge VALUES(0, 3, 30);
+ INSERT INTO edge VALUES(2, 4, 40);
+ INSERT INTO edge VALUES(3, 4, 40);
+ INSERT INTO edge VALUES(2, 5, 50);
+ INSERT INTO edge VALUES(3, 6, 60);
+ INSERT INTO edge VALUES(5, 7, 70);
+ INSERT INTO edge VALUES(3, 7, 70);
+ INSERT INTO edge VALUES(4, 8, 80);
+ INSERT INTO edge VALUES(7, 8, 80);
+ INSERT INTO edge VALUES(8, 9, 90);
+
+ WITH RECURSIVE
+ ancest(id, mtime) AS
+ (VALUES(0, 0)
+ UNION
+ SELECT edge.xto, edge.seq FROM edge, ancest
+ WHERE edge.xfrom=ancest.id
+ ORDER BY 2
+ )
+ SELECT * FROM ancest;
+} {0 0 1 10 2 20 3 30 4 40 5 50 6 60 7 70 8 80 9 90}
+do_execsql_test 5.2.2 {
+ WITH RECURSIVE
+ ancest(id, mtime) AS
+ (VALUES(0, 0)
+ UNION ALL
+ SELECT edge.xto, edge.seq FROM edge, ancest
+ WHERE edge.xfrom=ancest.id
+ ORDER BY 2
+ )
+ SELECT * FROM ancest;
+} {0 0 1 10 2 20 3 30 4 40 4 40 5 50 6 60 7 70 7 70 8 80 8 80 8 80 8 80 9 90 9 90 9 90 9 90}
+do_execsql_test 5.2.3 {
+ WITH RECURSIVE
+ ancest(id, mtime) AS
+ (VALUES(0, 0)
+ UNION ALL
+ SELECT edge.xto, edge.seq FROM edge, ancest
+ WHERE edge.xfrom=ancest.id
+ ORDER BY 2 LIMIT 4 OFFSET 2
+ )
+ SELECT * FROM ancest;
+} {2 20 3 30 4 40 4 40}
+
+do_catchsql_test 5.3 {
+ WITH i(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM i LIMIT 5)
+ SELECT x FROM i;
+} {0 {1 2 3 4 5}}
+
+do_execsql_test 5.4 {
+ WITH i(x) AS ( VALUES(1) UNION ALL SELECT (x+1)%10 FROM i)
+ SELECT x FROM i LIMIT 20;
+} {1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0}
+
+do_execsql_test 5.5 {
+ WITH i(x) AS ( VALUES(1) UNION SELECT (x+1)%10 FROM i)
+ SELECT x FROM i LIMIT 20;
+} {1 2 3 4 5 6 7 8 9 0}
+
+do_catchsql_test 5.6.1 {
+ WITH i(x, y) AS ( VALUES(1) )
+ SELECT * FROM i;
+} {1 {table i has 1 values for 2 columns}}
+
+do_catchsql_test 5.6.2 {
+ WITH i(x) AS ( VALUES(1,2) )
+ SELECT * FROM i;
+} {1 {table i has 2 values for 1 columns}}
+
+do_catchsql_test 5.6.3 {
+ CREATE TABLE t5(a, b);
+ WITH i(x) AS ( SELECT * FROM t5 )
+ SELECT * FROM i;
+} {1 {table i has 2 values for 1 columns}}
+
+do_catchsql_test 5.6.4 {
+ WITH i(x) AS ( SELECT 1, 2 UNION ALL SELECT 1 )
+ SELECT * FROM i;
+} {1 {table i has 2 values for 1 columns}}
+
+do_catchsql_test 5.6.5 {
+ WITH i(x) AS ( SELECT 1 UNION ALL SELECT 1, 2 )
+ SELECT * FROM i;
+} {1 {SELECTs to the left and right of UNION ALL do not have the same number of result columns}}
+
+do_catchsql_test 5.6.6 {
+ WITH i(x) AS ( SELECT 1 UNION ALL SELECT x+1, x*2 FROM i )
+ SELECT * FROM i;
+} {1 {SELECTs to the left and right of UNION ALL do not have the same number of result columns}}
+
+do_catchsql_test 5.6.7 {
+ WITH i(x) AS ( SELECT 1, 2 UNION SELECT x+1 FROM i )
+ SELECT * FROM i;
+} {1 {table i has 2 values for 1 columns}}
+
+#-------------------------------------------------------------------------
+#
+do_execsql_test 6.1 {
+ CREATE TABLE f(
+ id INTEGER PRIMARY KEY, parentid REFERENCES f, name TEXT
+ );
+
+ INSERT INTO f VALUES(0, NULL, '');
+ INSERT INTO f VALUES(1, 0, 'bin');
+ INSERT INTO f VALUES(2, 1, 'true');
+ INSERT INTO f VALUES(3, 1, 'false');
+ INSERT INTO f VALUES(4, 1, 'ls');
+ INSERT INTO f VALUES(5, 1, 'grep');
+ INSERT INTO f VALUES(6, 0, 'etc');
+ INSERT INTO f VALUES(7, 6, 'rc.d');
+ INSERT INTO f VALUES(8, 7, 'rc.apache');
+ INSERT INTO f VALUES(9, 7, 'rc.samba');
+ INSERT INTO f VALUES(10, 0, 'home');
+ INSERT INTO f VALUES(11, 10, 'dan');
+ INSERT INTO f VALUES(12, 11, 'public_html');
+ INSERT INTO f VALUES(13, 12, 'index.html');
+ INSERT INTO f VALUES(14, 13, 'logo.gif');
+}
+
+do_execsql_test 6.2 {
+ WITH flat(fid, fpath) AS (
+ SELECT id, '' FROM f WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, fpath || '/' || name FROM f, flat WHERE parentid=fid
+ )
+ SELECT fpath FROM flat WHERE fpath!='' ORDER BY 1;
+} {
+ /bin
+ /bin/false /bin/grep /bin/ls /bin/true
+ /etc
+ /etc/rc.d
+ /etc/rc.d/rc.apache /etc/rc.d/rc.samba
+ /home
+ /home/dan
+ /home/dan/public_html
+ /home/dan/public_html/index.html
+ /home/dan/public_html/index.html/logo.gif
+}
+
+do_execsql_test 6.3 {
+ WITH flat(fid, fpath) AS (
+ SELECT id, '' FROM f WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, fpath || '/' || name FROM f, flat WHERE parentid=fid
+ )
+ SELECT count(*) FROM flat;
+} {15}
+
+do_execsql_test 6.4 {
+ WITH x(i) AS (
+ SELECT 1
+ UNION ALL
+ SELECT i+1 FROM x WHERE i<10
+ )
+ SELECT count(*) FROM x
+} {10}
+
+
+#-------------------------------------------------------------------------
+
+do_execsql_test 7.1 {
+ CREATE TABLE tree(i, p);
+ INSERT INTO tree VALUES(1, NULL);
+ INSERT INTO tree VALUES(2, 1);
+ INSERT INTO tree VALUES(3, 1);
+ INSERT INTO tree VALUES(4, 2);
+ INSERT INTO tree VALUES(5, 4);
+}
+
+do_execsql_test 7.2 {
+ WITH t(id, path) AS (
+ SELECT i, '' FROM tree WHERE p IS NULL
+ UNION ALL
+ SELECT i, path || '/' || i FROM tree, t WHERE p = id
+ )
+ SELECT path FROM t;
+} {{} /2 /3 /2/4 /2/4/5}
+
+do_execsql_test 7.3 {
+ WITH t(id) AS (
+ VALUES(2)
+ UNION ALL
+ SELECT i FROM tree, t WHERE p = id
+ )
+ SELECT id FROM t;
+} {2 4 5}
+
+do_catchsql_test 7.4 {
+ WITH t(id) AS (
+ VALUES(2)
+ UNION ALL
+ SELECT i FROM tree WHERE p IN (SELECT id FROM t)
+ )
+ SELECT id FROM t;
+} {1 {recursive reference in a subquery: t}}
+
+do_catchsql_test 7.5 {
+ WITH t(id) AS (
+ VALUES(2)
+ UNION ALL
+ SELECT i FROM tree, t WHERE p = id AND p IN (SELECT id FROM t)
+ )
+ SELECT id FROM t;
+} {1 {multiple recursive references: t}}
+
+do_catchsql_test 7.6 {
+ WITH t(id) AS (
+ SELECT i FROM tree WHERE 2 IN (SELECT id FROM t)
+ UNION ALL
+ SELECT i FROM tree, t WHERE p = id
+ )
+ SELECT id FROM t;
+} {1 {circular reference: t}}
+
+# Compute the mandelbrot set using a recursive query
+#
+do_execsql_test 8.1-mandelbrot {
+ WITH RECURSIVE
+ xaxis(x) AS (VALUES(-2.0) UNION ALL SELECT x+0.05 FROM xaxis WHERE x<1.2),
+ yaxis(y) AS (VALUES(-1.0) UNION ALL SELECT y+0.1 FROM yaxis WHERE y<1.0),
+ m(iter, cx, cy, x, y) AS (
+ SELECT 0, x, y, 0.0, 0.0 FROM xaxis, yaxis
+ UNION ALL
+ SELECT iter+1, cx, cy, x*x-y*y + cx, 2.0*x*y + cy FROM m
+ WHERE (x*x + y*y) < 4.0 AND iter<28
+ ),
+ m2(iter, cx, cy) AS (
+ SELECT max(iter), cx, cy FROM m GROUP BY cx, cy
+ ),
+ a(t) AS (
+ SELECT group_concat( substr(' .+*#', 1+min(iter/7,4), 1), '')
+ FROM m2 GROUP BY cy
+ )
+ SELECT group_concat(rtrim(t),x'0a') FROM a;
+} {{ ....#
+ ..#*..
+ ..+####+.
+ .......+####.... +
+ ..##+*##########+.++++
+ .+.##################+.
+ .............+###################+.+
+ ..++..#.....*#####################+.
+ ...+#######++#######################.
+ ....+*################################.
+ #############################################...
+ ....+*################################.
+ ...+#######++#######################.
+ ..++..#.....*#####################+.
+ .............+###################+.+
+ .+.##################+.
+ ..##+*##########+.++++
+ .......+####.... +
+ ..+####+.
+ ..#*..
+ ....#
+ +.}}
+
+# Solve a sudoku puzzle using a recursive query
+#
+do_execsql_test 8.2-soduko {
+ WITH RECURSIVE
+ input(sud) AS (
+ VALUES('53..7....6..195....98....6.8...6...34..8.3..17...2...6.6....28....419..5....8..79')
+ ),
+
+ /* A table filled with digits 1..9, inclusive. */
+ digits(z, lp) AS (
+ VALUES('1', 1)
+ UNION ALL SELECT
+ CAST(lp+1 AS TEXT), lp+1 FROM digits WHERE lp<9
+ ),
+
+ /* The tricky bit. */
+ x(s, ind) AS (
+ SELECT sud, instr(sud, '.') FROM input
+ UNION ALL
+ SELECT
+ substr(s, 1, ind-1) || z || substr(s, ind+1),
+ instr( substr(s, 1, ind-1) || z || substr(s, ind+1), '.' )
+ FROM x, digits AS z
+ WHERE ind>0
+ AND NOT EXISTS (
+ SELECT 1
+ FROM digits AS lp
+ WHERE z.z = substr(s, ((ind-1)/9)*9 + lp, 1)
+ OR z.z = substr(s, ((ind-1)%9) + (lp-1)*9 + 1, 1)
+ OR z.z = substr(s, (((ind-1)/3) % 3) * 3
+ + ((ind-1)/27) * 27 + lp
+ + ((lp-1) / 3) * 6, 1)
+ )
+ )
+ SELECT s FROM x WHERE ind=0;
+} {534678912672195348198342567859761423426853791713924856961537284287419635345286179}
+
+#--------------------------------------------------------------------------
+# Some tests that use LIMIT and OFFSET in the definition of recursive CTEs.
+#
+set I [list 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]
+proc limit_test {tn iLimit iOffset} {
+ if {$iOffset < 0} { set iOffset 0 }
+ if {$iLimit < 0 } {
+ set result [lrange $::I $iOffset end]
+ } else {
+ set result [lrange $::I $iOffset [expr $iLimit+$iOffset-1]]
+ }
+ uplevel [list do_execsql_test $tn [subst -nocommands {
+ WITH ii(a) AS (
+ VALUES(1)
+ UNION ALL
+ SELECT a+1 FROM ii WHERE a<20
+ LIMIT $iLimit OFFSET $iOffset
+ )
+ SELECT * FROM ii
+ }] $result]
+}
+
+limit_test 9.1 20 0
+limit_test 9.2 0 0
+limit_test 9.3 19 1
+limit_test 9.4 20 -1
+limit_test 9.5 5 5
+limit_test 9.6 0 -1
+limit_test 9.7 40 -1
+limit_test 9.8 -1 -1
+limit_test 9.9 -1 -1
+
+#--------------------------------------------------------------------------
+# Test the ORDER BY clause on recursive tables.
+#
+
+do_execsql_test 10.1 {
+ DROP TABLE IF EXISTS tree;
+ CREATE TABLE tree(id INTEGER PRIMARY KEY, parentid, payload);
+}
+
+proc insert_into_tree {L} {
+ db eval { DELETE FROM tree }
+ foreach key $L {
+ unset -nocomplain parentid
+ foreach seg [split $key /] {
+ if {$seg==""} continue
+ set id [db one {
+ SELECT id FROM tree WHERE parentid IS $parentid AND payload=$seg
+ }]
+ if {$id==""} {
+ db eval { INSERT INTO tree VALUES(NULL, $parentid, $seg) }
+ set parentid [db last_insert_rowid]
+ } else {
+ set parentid $id
+ }
+ }
+ }
+}
+
+insert_into_tree {
+ /a/a/a
+ /a/b/c
+ /a/b/c/d
+ /a/b/d
+}
+do_execsql_test 10.2 {
+ WITH flat(fid, p) AS (
+ SELECT id, '/' || payload FROM tree WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, p || '/' || payload FROM flat, tree WHERE parentid=fid
+ )
+ SELECT p FROM flat ORDER BY p;
+} {
+ /a /a/a /a/a/a
+ /a/b /a/b/c /a/b/c/d
+ /a/b/d
+}
+
+# Scan the tree-structure currently stored in table tree. Return a list
+# of nodes visited.
+#
+proc scan_tree {bDepthFirst bReverse} {
+
+ set order "ORDER BY "
+ if {$bDepthFirst==0} { append order "2 ASC," }
+ if {$bReverse==0} {
+ append order " 3 ASC"
+ } else {
+ append order " 3 DESC"
+ }
+
+ db eval "
+ WITH flat(fid, depth, p) AS (
+ SELECT id, 1, '/' || payload FROM tree WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, depth+1, p||'/'||payload FROM flat, tree WHERE parentid=fid
+ $order
+ )
+ SELECT p FROM flat;
+ "
+}
+
+insert_into_tree {
+ /a/b
+ /a/b/c
+ /a/d
+ /a/d/e
+ /a/d/f
+ /g/h
+}
+
+# Breadth first, siblings in ascending order.
+#
+do_test 10.3 {
+ scan_tree 0 0
+} [list {*}{
+ /a /g
+ /a/b /a/d /g/h
+ /a/b/c /a/d/e /a/d/f
+}]
+
+# Depth first, siblings in ascending order.
+#
+do_test 10.4 {
+ scan_tree 1 0
+} [list {*}{
+ /a /a/b /a/b/c
+ /a/d /a/d/e
+ /a/d/f
+ /g /g/h
+}]
+
+# Breadth first, siblings in descending order.
+#
+do_test 10.5 {
+ scan_tree 0 1
+} [list {*}{
+ /g /a
+ /g/h /a/d /a/b
+ /a/d/f /a/d/e /a/b/c
+}]
+
+# Depth first, siblings in ascending order.
+#
+do_test 10.6 {
+ scan_tree 1 1
+} [list {*}{
+ /g /g/h
+ /a /a/d /a/d/f
+ /a/d/e
+ /a/b /a/b/c
+}]
+
+
+# Test name resolution in ORDER BY clauses.
+#
+do_catchsql_test 10.7.1 {
+ WITH t(a) AS (
+ SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY a
+ )
+ SELECT * FROM t
+} {1 {1st ORDER BY term does not match any column in the result set}}
+do_execsql_test 10.7.2 {
+ WITH t(a) AS (
+ SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY b
+ )
+ SELECT * FROM t
+} {1 2 3 4 5}
+do_execsql_test 10.7.3 {
+ WITH t(a) AS (
+ SELECT 1 AS b UNION ALL SELECT a+1 AS c FROM t WHERE a<5 ORDER BY c
+ )
+ SELECT * FROM t
+} {1 2 3 4 5}
+
+# Test COLLATE clauses attached to ORDER BY.
+#
+insert_into_tree {
+ /a/b
+ /a/C
+ /a/d
+ /B/e
+ /B/F
+ /B/g
+ /c/h
+ /c/I
+ /c/j
+}
+
+do_execsql_test 10.8.1 {
+ WITH flat(fid, depth, p) AS (
+ SELECT id, 1, '/' || payload FROM tree WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, depth+1, p||'/'||payload FROM flat, tree WHERE parentid=fid
+ ORDER BY 2, 3 COLLATE nocase
+ )
+ SELECT p FROM flat;
+} {
+ /a /B /c
+ /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+do_execsql_test 10.8.2 {
+ WITH flat(fid, depth, p) AS (
+ SELECT id, 1, ('/' || payload) COLLATE nocase
+ FROM tree WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, depth+1, (p||'/'||payload)
+ FROM flat, tree WHERE parentid=fid
+ ORDER BY 2, 3
+ )
+ SELECT p FROM flat;
+} {
+ /a /B /c
+ /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+
+do_execsql_test 10.8.3 {
+ WITH flat(fid, depth, p) AS (
+ SELECT id, 1, ('/' || payload)
+ FROM tree WHERE parentid IS NULL
+ UNION ALL
+ SELECT id, depth+1, (p||'/'||payload) COLLATE nocase
+ FROM flat, tree WHERE parentid=fid
+ ORDER BY 2, 3
+ )
+ SELECT p FROM flat;
+} {
+ /a /B /c
+ /a/b /a/C /a/d /B/e /B/F /B/g /c/h /c/I /c/j
+}
+
+do_execsql_test 10.8.4.1 {
+ CREATE TABLE tst(a,b);
+ INSERT INTO tst VALUES('a', 'A');
+ INSERT INTO tst VALUES('b', 'B');
+ INSERT INTO tst VALUES('c', 'C');
+ SELECT a COLLATE nocase FROM tst UNION ALL SELECT b FROM tst ORDER BY 1;
+} {a A b B c C}
+do_execsql_test 10.8.4.2 {
+ SELECT a FROM tst UNION ALL SELECT b COLLATE nocase FROM tst ORDER BY 1;
+} {A B C a b c}
+do_execsql_test 10.8.4.3 {
+ SELECT a||'' FROM tst UNION ALL SELECT b COLLATE nocase FROM tst ORDER BY 1;
+} {a A b B c C}
+
+# Test cases to illustrate on the ORDER BY clause on a recursive query can be
+# used to control depth-first versus breath-first search in a tree.
+#
+do_execsql_test 11.1 {
+ CREATE TABLE org(
+ name TEXT PRIMARY KEY,
+ boss TEXT REFERENCES org
+ ) WITHOUT ROWID;
+ INSERT INTO org VALUES('Alice',NULL);
+ INSERT INTO org VALUES('Bob','Alice');
+ INSERT INTO org VALUES('Cindy','Alice');
+ INSERT INTO org VALUES('Dave','Bob');
+ INSERT INTO org VALUES('Emma','Bob');
+ INSERT INTO org VALUES('Fred','Cindy');
+ INSERT INTO org VALUES('Gail','Cindy');
+ INSERT INTO org VALUES('Harry','Dave');
+ INSERT INTO org VALUES('Ingrid','Dave');
+ INSERT INTO org VALUES('Jim','Emma');
+ INSERT INTO org VALUES('Kate','Emma');
+ INSERT INTO org VALUES('Lanny','Fred');
+ INSERT INTO org VALUES('Mary','Fred');
+ INSERT INTO org VALUES('Noland','Gail');
+ INSERT INTO org VALUES('Olivia','Gail');
+ -- The above are all under Alice. Add a few more records for people
+ -- not in Alice's group, just to prove that they won't be selected.
+ INSERT INTO org VALUES('Xaviar',NULL);
+ INSERT INTO org VALUES('Xia','Xaviar');
+ INSERT INTO org VALUES('Xerxes','Xaviar');
+ INSERT INTO org VALUES('Xena','Xia');
+ -- Find all members of Alice's group, breath-first order
+ WITH RECURSIVE
+ under_alice(name,level) AS (
+ VALUES('Alice','0')
+ UNION ALL
+ SELECT org.name, under_alice.level+1
+ FROM org, under_alice
+ WHERE org.boss=under_alice.name
+ ORDER BY 2
+ )
+ SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+ FROM under_alice;
+} {{Alice
+...Bob
+...Cindy
+......Dave
+......Emma
+......Fred
+......Gail
+.........Harry
+.........Ingrid
+.........Jim
+.........Kate
+.........Lanny
+.........Mary
+.........Noland
+.........Olivia}}
+
+# The previous query used "ORDER BY level" to yield a breath-first search.
+# Change that to "ORDER BY level DESC" for a depth-first search.
+#
+do_execsql_test 11.2 {
+ WITH RECURSIVE
+ under_alice(name,level) AS (
+ VALUES('Alice','0')
+ UNION ALL
+ SELECT org.name, under_alice.level+1
+ FROM org, under_alice
+ WHERE org.boss=under_alice.name
+ ORDER BY 2 DESC
+ )
+ SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+ FROM under_alice;
+} {{Alice
+...Bob
+......Dave
+.........Harry
+.........Ingrid
+......Emma
+.........Jim
+.........Kate
+...Cindy
+......Fred
+.........Lanny
+.........Mary
+......Gail
+.........Noland
+.........Olivia}}
+
+# Without an ORDER BY clause, the recursive query should use a FIFO,
+# resulting in a breath-first search.
+#
+do_execsql_test 11.3 {
+ WITH RECURSIVE
+ under_alice(name,level) AS (
+ VALUES('Alice','0')
+ UNION ALL
+ SELECT org.name, under_alice.level+1
+ FROM org, under_alice
+ WHERE org.boss=under_alice.name
+ )
+ SELECT group_concat(substr('...............',1,level*3) || name,x'0a')
+ FROM under_alice;
+} {{Alice
+...Bob
+...Cindy
+......Dave
+......Emma
+......Fred
+......Gail
+.........Harry
+.........Ingrid
+.........Jim
+.........Kate
+.........Lanny
+.........Mary
+.........Noland
+.........Olivia}}
+
+#--------------------------------------------------------------------------
+# Ticket [31a19d11b97088296ac104aaff113a9790394927] (2014-02-09)
+# Name resolution issue with compound SELECTs and Common Table Expressions
+#
+do_execsql_test 12.1 {
+WITH RECURSIVE
+ t1(x) AS (VALUES(2) UNION ALL SELECT x+2 FROM t1 WHERE x<20),
+ t2(y) AS (VALUES(3) UNION ALL SELECT y+3 FROM t2 WHERE y<20)
+SELECT x FROM t1 EXCEPT SELECT y FROM t2 ORDER BY 1;
+} {2 4 8 10 14 16 20}
+
+
+finish_test
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-09 10:33:15 +0000