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diff --git a/test/trace.test b/test/trace.test
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+# 2004 Jun 29
+#
+# 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.
+#
+# This file implements tests for the "sqlite3_trace()" API.
+#
+# $Id: trace.test,v 1.8 2009/04/07 14:14:23 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable !trace {
+  finish_test
+  return
+}
+
+set ::stmtlist {}
+do_test trace-1.1 {
+  set rc [catch {db trace 1 2 3} msg]
+  lappend rc $msg
+} {1 {wrong # args: should be "db trace ?CALLBACK?"}}
+proc trace_proc cmd {
+  lappend ::stmtlist [string trim $cmd]
+}
+do_test trace-1.2 {
+  db trace trace_proc
+  db trace
+} {trace_proc}
+do_test trace-1.3 {
+  execsql {
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,2);
+    SELECT * FROM t1;
+  }
+} {1 2}
+do_test trace-1.4 {
+  set ::stmtlist
+} {{CREATE TABLE t1(a,b);} {INSERT INTO t1 VALUES(1,2);} {SELECT * FROM t1;}}
+do_test trace-1.5 {
+  db trace {}
+  db trace
+} {}
+
+# If we prepare a statement and execute it multiple times, the trace
+# happens on each execution.
+#
+db close
+sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
+do_test trace-2.1 {
+  set STMT [sqlite3_prepare $DB {INSERT INTO t1 VALUES(2,3)} -1 TAIL]
+  db trace trace_proc
+  proc trace_proc sql {
+    global TRACE_OUT
+    lappend TRACE_OUT [string trim $sql]
+  }
+  set TRACE_OUT {}
+  sqlite3_step $STMT
+  set TRACE_OUT
+} {{INSERT INTO t1 VALUES(2,3)}}
+do_test trace-2.2 {
+  set TRACE_OUT {}
+  sqlite3_reset $STMT
+  set TRACE_OUT 
+} {}
+do_test trace-2.3 {
+  sqlite3_step $STMT
+  set TRACE_OUT
+} {{INSERT INTO t1 VALUES(2,3)}}
+do_test trace-2.4 {
+  set TRACE_OUT {}
+  execsql {SELECT * FROM t1}
+} {1 2 2 3 2 3}
+do_test trace-2.5 {
+  set TRACE_OUT
+} {{SELECT * FROM t1}}
+catch {sqlite3_finalize $STMT}
+
+do_test trace-2.6 {
+  set TRACE_OUT {}
+  db eval VACUUM
+  set TRACE_OUT
+} {VACUUM}
+
+# Similar tests, but this time for profiling.
+# 
+do_test trace-3.1 {
+  set rc [catch {db profile 1 2 3} msg]
+  lappend rc $msg
+} {1 {wrong # args: should be "db profile ?CALLBACK?"}}
+set ::stmtlist {}
+proc profile_proc {cmd tm} {
+  lappend ::stmtlist [string trim $cmd]
+}
+do_test trace-3.2 {
+  db trace {}
+  db profile profile_proc
+  db profile
+} {profile_proc}
+do_test trace-3.3 {
+  execsql {
+    CREATE TABLE t2(a,b);
+    INSERT INTO t2 VALUES(1,2);
+    SELECT * FROM t2;
+  }
+} {1 2}
+do_test trace-3.4 {
+  set ::stmtlist
+} {{CREATE TABLE t2(a,b);} {INSERT INTO t2 VALUES(1,2);} {SELECT * FROM t2;}}
+do_test trace-3.5 {
+  db profile {}
+  db profile
+} {}
+
+# If we prepare a statement and execute it multiple times, the profile
+# happens on each execution.
+#
+db close
+sqlite3 db test.db; set DB [sqlite3_connection_pointer db]
+do_test trace-4.1 {
+  set STMT [sqlite3_prepare $DB {INSERT INTO t2 VALUES(2,3)} -1 TAIL]
+  db trace trace_proc
+  proc profile_proc {sql tm} {
+    global TRACE_OUT
+    lappend TRACE_OUT [string trim $sql]
+  }
+  set TRACE_OUT {}
+  sqlite3_step $STMT
+  set TRACE_OUT
+} {{INSERT INTO t2 VALUES(2,3)}}
+do_test trace-4.2 {
+  set TRACE_OUT {}
+  sqlite3_reset $STMT
+  set TRACE_OUT 
+} {}
+do_test trace-4.3 {
+  sqlite3_step $STMT
+  set TRACE_OUT
+} {{INSERT INTO t2 VALUES(2,3)}}
+do_test trace-4.4 {
+  set TRACE_OUT {}
+  execsql {SELECT * FROM t1}
+} {1 2 2 3 2 3}
+do_test trace-4.5 {
+  set TRACE_OUT
+} {{SELECT * FROM t1}}
+catch {sqlite3_finalize $STMT}
+
+# Trigger tracing.
+#
+ifcapable trigger {
+  do_test trace-5.1 {
+    db eval {
+      CREATE TRIGGER r1t1 AFTER UPDATE ON t1 BEGIN
+        UPDATE t2 SET a=new.a WHERE rowid=new.rowid;
+      END;
+      CREATE TRIGGER r1t2 AFTER UPDATE ON t2 BEGIN
+        SELECT 'hello';
+      END;
+    }
+    set TRACE_OUT {}
+    proc trace_proc cmd {
+      lappend ::TRACE_OUT [string trim $cmd]
+    }
+    db eval {
+      UPDATE t1 SET a=a+1;
+    }
+    set TRACE_OUT
+  } {{UPDATE t1 SET a=a+1;} {-- TRIGGER r1t1} {-- TRIGGER r1t2} {-- TRIGGER r1t1} {-- TRIGGER r1t2} {-- TRIGGER r1t1} {-- TRIGGER r1t2}}
+}
+
+# With 3.6.21, we add the ability to expand host parameters in the trace
+# output.  Test this feature.
+#
+do_test trace-6.1 {
+  set ::t6int [expr {3+3}]
+  set ::t6real [expr {1.5*4.0}]
+  set ::t6str {test-six y'all}
+  db eval {SELECT x'3031323334' AS x} {set ::t6blob $x}
+  unset -nocomplain t6null
+  set TRACE_OUT {}
+  execsql {SELECT $::t6int, $::t6real, $t6str, $t6blob, $t6null}
+} {6 6.0 {test-six y'all} 01234 {}}
+do_test trace-6.2 {
+  set TRACE_OUT
+} {{SELECT 6, 6.0, 'test-six y''all', x'3031323334', NULL}}
+do_test trace-6.3 {
+  set TRACE_OUT {}
+  execsql {SELECT $::t6int, ?1, $::t6int}
+} {6 6 6}
+do_test trace-6.4 {
+  set TRACE_OUT
+} {{SELECT 6, 6, 6}}
+do_test trace-6.5 {
+  execsql {CREATE TABLE t6([$::t6int],"?1"); INSERT INTO t6 VALUES(1,2)}
+  set TRACE_OUT {}
+  execsql {SELECT '$::t6int', [$::t6int], $::t6int, ?1, "?1", $::t6int FROM t6}
+} {{$::t6int} 1 6 6 2 6}
+do_test trace-6.6 {
+  set TRACE_OUT
+} {{SELECT '$::t6int', [$::t6int], 6, 6, "?1", 6 FROM t6}}
+
+# Do these same tests with a UTF16 database.
+#
+do_test trace-6.100 {
+  db close
+  sqlite3 db :memory:
+  db eval {
+     PRAGMA encoding=UTF16be;
+     CREATE TABLE t6([$::t6str],"?1");
+     INSERT INTO t6 VALUES(1,2);
+  }
+  db trace trace_proc
+  set TRACE_OUT {}
+  execsql {SELECT '$::t6str', [$::t6str], $::t6str, ?1, "?1", $::t6str FROM t6}
+} {{$::t6str} 1 {test-six y'all} {test-six y'all} 2 {test-six y'all}}
+do_test trace-6.101 {
+  set TRACE_OUT
+} {{SELECT '$::t6str', [$::t6str], 'test-six y''all', 'test-six y''all', "?1", 'test-six y''all' FROM t6}}
+
+do_test trace-6.200 {
+  db close
+  sqlite3 db :memory:
+  db eval {
+     PRAGMA encoding=UTF16le;
+     CREATE TABLE t6([$::t6str],"?1");
+     INSERT INTO t6 VALUES(1,2);
+  }
+  db trace trace_proc
+  set TRACE_OUT {}
+  execsql {SELECT '$::t6str', [$::t6str], $::t6str, ?1, "?1", $::t6str FROM t6}
+} {{$::t6str} 1 {test-six y'all} {test-six y'all} 2 {test-six y'all}}
+do_test trace-6.201 {
+  set TRACE_OUT
+} {{SELECT '$::t6str', [$::t6str], 'test-six y''all', 'test-six y''all', "?1", 'test-six y''all' FROM t6}}
+
+
+finish_test