[sql] Import SQLite 3.17.0.

third_party/sqlite/src/test/mmap3.test

 # 2013-05-23
 #
 # 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
 ifcapable !mmap||!vtab {
   finish_test
   return
 }
 source $testdir/lock_common.tcl
 set testprefix mmap3
 
+# A codec shuts down memory-mapped I/O
+if {[nonzero_reserved_bytes]} {finish_test; return;}
+
 do_test mmap3-1.0 {
   load_static_extension db wholenumber
   db eval {
     PRAGMA mmap_size=100000;
     CREATE TABLE t1(x, y);
     CREATE VIRTUAL TABLE nums USING wholenumber;
     INSERT INTO t1 SELECT value, randomblob(value) FROM nums
                     WHERE value BETWEEN 1 and 1000;
     SELECT sum(x), sum(length(y)) from t1;
     PRAGMA mmap_size;
@@ skipping 57 matching lines @@
   db eval {SELECT x FROM t1 WHERE +x BETWEEN 10 AND 15} {
     db eval {PRAGMA mmap_size=75000}
   }
   db eval {
     PRAGMA quick_check;
     PRAGMA mmap_size;
   }
 } {ok 75000}
 
 finish_test