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+#
+# 2007 November 12
+#
+# 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 script is making sure that the names of collation
+# sequences may be quoted using double quotes in SQL statements.
+#
+# $Id: collate9.test,v 1.2 2008/07/10 00:32:42 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+proc reverse_sort {lhs rhs} {
+  return [string compare $rhs $lhs]
+}
+db collate "reverse sort" reverse_sort
+
+# This procedure executes the SQL.  Then it checks to see if the OP_Sort
+# opcode was executed.  If an OP_Sort did occur, then "sort" is appended
+# to the result.  If no OP_Sort happened, then "nosort" is appended.
+#
+# This procedure is used to check to make sure sorting is or is not
+# occurring as expected.
+#
+proc cksort {sql} {
+  set ::sqlite_sort_count 0
+  set data [execsql $sql]
+  if {$::sqlite_sort_count} {set x sort} {set x nosort}
+  lappend data $x
+  return $data
+}
+
+# Test plan:
+#
+#     collate9-1.* - Test collation sequences attached to table columns
+#     collate9-2.* - Test collation sequences attached to expressions
+#     collate9-3.* - Test collation sequences attached to an index
+#     collate9-4.* - Test collation sequences as an argument to REINDEX
+#
+
+do_test collate9-1.1 {
+  execsql {
+    CREATE TABLE xy(x COLLATE "reverse sort", y COLLATE binary);
+    INSERT INTO xy VALUES('one', 'one');
+    INSERT INTO xy VALUES('two', 'two');
+    INSERT INTO xy VALUES('three', 'three');
+  }
+} {}
+do_test collate9-1.2 {
+  execsql { 
+    SELECT x FROM xy ORDER BY x
+  }
+} {two three one}
+do_test collate9-1.3 {
+  execsql { 
+    SELECT y FROM xy ORDER BY y
+  }
+} {one three two}
+do_test collate9-1.4 {
+  cksort { 
+    SELECT x FROM xy ORDER BY x
+  }
+} {two three one sort}
+do_test collate9-1.5 {
+  execsql { 
+    CREATE INDEX xy_i ON xy(x)
+  }
+} {}
+do_test collate9-1.6 {
+  cksort { 
+    SELECT x FROM xy ORDER BY x
+  }
+} {two three one nosort}
+
+do_test collate9-2.1 {
+  execsql { 
+    SELECT x, x < 'seven' FROM xy ORDER BY x
+  }
+} {two 1 three 1 one 0}
+do_test collate9-2.2 {
+  execsql { 
+    SELECT y, y < 'seven' FROM xy ORDER BY x
+  }
+} {two 0 three 0 one 1}
+do_test collate9-2.3 {
+  execsql { 
+    SELECT y, y COLLATE "reverse sort" < 'seven' FROM xy ORDER BY x
+  }
+} {two 1 three 1 one 0}
+do_test collate9-2.4 {
+  execsql {
+    SELECT y FROM xy ORDER BY y
+  }
+} {one three two}
+do_test collate9-2.5 {
+  execsql {
+    SELECT y FROM xy ORDER BY y COLLATE "reverse sort"
+  }
+} {two three one}
+do_test collate9-2.6 {
+  execsql {
+    SELECT y COLLATE "reverse sort" AS aaa FROM xy ORDER BY aaa
+  }
+} {two three one}
+
+do_test collate9-3.1 {
+  execsql {
+    CREATE INDEX xy_i2 ON xy(y COLLATE "reverse sort");
+  }
+} {}
+do_test collate9-3.2 {
+  cksort { 
+    SELECT y FROM xy ORDER BY y 
+  }
+} {one three two sort}
+do_test collate9-3.3 {
+  cksort { 
+    SELECT y FROM xy ORDER BY y COLLATE "reverse sort"
+  }
+} {two three one nosort}
+do_test collate9-3.4 {
+  cksort { 
+    SELECT y AS aaa FROM xy ORDER BY aaa
+  }
+} {one three two sort}
+do_test collate9-3.5 {
+  cksort { 
+    SELECT y COLLATE "reverse sort" AS aaa FROM xy ORDER BY aaa
+  }
+} {two three one nosort}
+
+ifcapable reindex {
+  do_test collate9-4.1 {
+    execsql {
+      REINDEX "reverse sort"
+    }
+  } {}
+
+  # Modify the "reverse sort" collation so that it now sorts in the same
+  # order as binary.
+  proc reverse_sort {lhs rhs} {
+    return [string compare $lhs $rhs]
+  }
+
+  # The integrity check should now fail because the indexes created using
+  # "reverse sort" are no longer in sync with the collation sequence
+  # implementation.
+  do_test collate9-4.2 {
+    expr {"ok" eq [execsql { PRAGMA integrity_check }]}
+  } {0}
+
+  do_test collate9-4.3 {
+    execsql {
+      REINDEX "reverse sort"
+    }
+  } {}
+
+  # Integrity check should now pass.
+  do_test collate9-4.4 {
+    expr {"ok" eq [execsql { PRAGMA integrity_check }]}
+  } {1}
+
+  do_test collate9-4.5 {
+    cksort {
+      SELECT x FROM xy ORDER BY x COLLATE "reverse sort"
+    }
+  } {one three two nosort}
+}
+
+finish_test