From: drh <drh@noemail.net>
Date: Sat, 18 Jan 2014 18:33:44 +0000 (+0000)
Subject: Add a sudoku solver to the recursive query tests in with1.test.
X-Git-Tag: version-3.8.3~36
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=717c09c4a94406e27148dc75f18afd02e023b845;p=thirdparty%2Fsqlite.git

Add a sudoku solver to the recursive query tests in with1.test.

FossilOrigin-Name: 679eff8759aa25368b977c0d26b78a9fcd9486f5
---

diff --git a/manifest b/manifest
index 522f30a10d..7463d67494 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sextra\stest\scases.\sNo\schanges\sto\scode.
-D 2014-01-18T15:59:35.958
+C Add\sa\ssudoku\ssolver\sto\sthe\srecursive\squery\stests\sin\swith1.test.
+D 2014-01-18T18:33:44.994
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -1091,7 +1091,7 @@ F test/wild001.test bca33f499866f04c24510d74baf1e578d4e44b1c
 F test/win32heap.test ea19770974795cff26e11575e12d422dbd16893c
 F test/win32lock.test 7a6bd73a5dcdee39b5bb93e92395e1773a194361
 F test/win32longpath.test 169c75a3b2e43481f4a62122510210c67b08f26d
-F test/with1.test be21f7efdc08fe6ad182dc943d42704300f0fcdb
+F test/with1.test cec63b56797a70842afa8929c241dfdb3d864283
 F test/with2.test 67a3347f2d78618db9434a248fb5003af8f04bc1
 F test/withM.test e97f2a8c506ab3ea9eab94e6f6072f6cc924c991
 F test/without_rowid1.test aaa26da19d543cd8d3d2d0e686dfa255556c15c8
@@ -1151,7 +1151,7 @@ F tool/vdbe-compress.tcl 0cf56e9263a152b84da86e75a5c0cdcdb7a47891
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 2ad4583c0cc7988f0dfe78fd0a2eb0fdb92d835a
-R 71fcd9d8c24b81a08237ce7106794f40
-U dan
-Z 1a2b2ad5eb21bdc784c4eae4f3f812b5
+P d38d485e581dab99a3ee6b348da8ddaf9b379ff2
+R 65511deacff317a7a6d96d8a97a06cc3
+U drh
+Z 1781cdebe197572ff0a729675feb42d9
diff --git a/manifest.uuid b/manifest.uuid
index e5d4cbf4df..8e6cce16db 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-d38d485e581dab99a3ee6b348da8ddaf9b379ff2
\ No newline at end of file
+679eff8759aa25368b977c0d26b78a9fcd9486f5
\ No newline at end of file
diff --git a/test/with1.test b/test/with1.test
index 54e0f0aa91..fcf59267f2 100644
--- a/test/with1.test
+++ b/test/with1.test
@@ -367,4 +367,41 @@ do_execsql_test 8.1 {
                                     ....#
                                     +.}}
 
+# Solve a sudoku puzzle using a recursive query
+#
+do_execsql_test 8.2 {
+  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}
+
 finish_test