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+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+# 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.
+#
+#***********************************************************************
+#
+# Tests to make sure that value returned by last_statement_change_count()
+# (LSCC) is updated properly, especially inside triggers
+#
+# Note 1: LSCC remains constant within a statement and only updates once
+# the statement is finished (triggers count as part of statement)
+# Note 2: LSCC is changed within the context of a trigger
+# much like last_insert_rowid() (see lastinsert.test),
+# but is restored once the trigger exits
+# Note 3: LSCC is not changed by a change to a view (since everything
+# is done within instead of trigger context)
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# ----------------------------------------------------------------------------
+# 1.x - basic tests (no triggers)
+
+# LSCC set properly after insert
+do_test laststmtchanges-1.1 {
+ catchsql {
+ create table t0 (x);
+ insert into t0 values (1);
+ insert into t0 values (1);
+ insert into t0 values (2);
+ insert into t0 values (2);
+ insert into t0 values (1);
+ insert into t0 values (1);
+ insert into t0 values (1);
+ insert into t0 values (2);
+ select last_statement_change_count();
+ }
+} {0 1}
+
+# LSCC set properly after update
+do_test laststmtchanges-1.2 {
+ catchsql {
+ update t0 set x=3 where x=1;
+ select last_statement_change_count();
+ }
+} {0 5}
+
+# LSCC unchanged within an update statement
+do_test laststmtchanges-1.3 {
+ catchsql {
+ update t0 set x=x+last_statement_change_count() where x=3;
+ select count() from t0 where x=8;
+ }
+} {0 5}
+
+# LSCC set properly after update on table where no rows changed
+do_test laststmtchanges-1.4 {
+ catchsql {
+ update t0 set x=77 where x=88;
+ select last_statement_change_count();
+ }
+} {0 0}
+
+# LSCC set properly after delete from table
+do_test laststmtchanges-1.5 {
+ catchsql {
+ delete from t0 where x=2;
+ select last_statement_change_count();
+ }
+} {0 3}
+
+# ----------------------------------------------------------------------------
+# 2.x - tests with after insert trigger
+
+# LSCC changed properly after insert into table containing after trigger
+do_test laststmtchanges-2.1 {
+ catchsql {
+ create table t1 (k integer primary key);
+ create table t2 (k integer primary key, v1, v2);
+ create trigger r1 after insert on t1 for each row begin
+ insert into t2 values (NULL, last_statement_change_count(), NULL);
+ update t0 set x=x;
+ update t2 set v2=last_statement_change_count();
+ end;
+ insert into t1 values (77);
+ select last_statement_change_count();
+ }
+} {0 1}
+
+# LSCC unchanged upon entry into after insert trigger
+do_test laststmtchanges-2.2 {
+ catchsql {
+ select v1 from t2;
+ }
+} {0 3}
+
+# LSCC changed properly by update within context of after insert trigger
+do_test laststmtchanges-2.3 {
+ catchsql {
+ select v2 from t2;
+ }
+} {0 5}
+
+# ----------------------------------------------------------------------------
+# 3.x - tests with after update trigger
+
+# LSCC changed properly after update into table containing after trigger
+do_test laststmtchanges-3.1 {
+ catchsql {
+ drop trigger r1;
+ delete from t2; delete from t2;
+ create trigger r1 after update on t1 for each row begin
+ insert into t2 values (NULL, last_statement_change_count(), NULL);
+ delete from t0 where oid=1 or oid=2;
+ update t2 set v2=last_statement_change_count();
+ end;
+ update t1 set k=k;
+ select last_statement_change_count();
+ }
+} {0 1}
+
+# LSCC unchanged upon entry into after update trigger
+do_test laststmtchanges-3.2 {
+ catchsql {
+ select v1 from t2;
+ }
+} {0 0}
+
+# LSCC changed properly by delete within context of after update trigger
+do_test laststmtchanges-3.3 {
+ catchsql {
+ select v2 from t2;
+ }
+} {0 2}
+
+# ----------------------------------------------------------------------------
+# 4.x - tests with before delete trigger
+
+# LSCC changed properly on delete from table containing before trigger
+do_test laststmtchanges-4.1 {
+ catchsql {
+ drop trigger r1;
+ delete from t2; delete from t2;
+ create trigger r1 before delete on t1 for each row begin
+ insert into t2 values (NULL, last_statement_change_count(), NULL);
+ insert into t0 values (5);
+ update t2 set v2=last_statement_change_count();
+ end;
+ delete from t1;
+ select last_statement_change_count();
+ }
+} {0 1}
+
+# LSCC unchanged upon entry into before delete trigger
+do_test laststmtchanges-4.2 {
+ catchsql {
+ select v1 from t2;
+ }
+} {0 0}
+
+# LSCC changed properly by insert within context of before delete trigger
+do_test laststmtchanges-4.3 {
+ catchsql {
+ select v2 from t2;
+ }
+} {0 1}
+
+# ----------------------------------------------------------------------------
+# 5.x - complex tests with temporary tables and nested instead of triggers
+
+do_test laststmtchanges-5.1 {
+ catchsql {
+ drop table t0; drop table t1; drop table t2;
+ create temp table t0(x);
+ create temp table t1 (k integer primary key);
+ create temp table t2 (k integer primary key);
+ create temp view v1 as select * from t1;
+ create temp view v2 as select * from t2;
+ create temp table n1 (k integer primary key, n);
+ create temp table n2 (k integer primary key, n);
+ insert into t0 values (1);
+ insert into t0 values (2);
+ insert into t0 values (1);
+ insert into t0 values (1);
+ insert into t0 values (1);
+ insert into t0 values (2);
+ insert into t0 values (2);
+ insert into t0 values (1);
+ create temp trigger r1 instead of insert on v1 for each row begin
+ insert into n1 values (NULL, last_statement_change_count());
+ update t0 set x=x*10 where x=1;
+ insert into n1 values (NULL, last_statement_change_count());
+ insert into t1 values (NEW.k);
+ insert into n1 values (NULL, last_statement_change_count());
+ update t0 set x=x*10 where x=0;
+ insert into v2 values (100+NEW.k);
+ insert into n1 values (NULL, last_statement_change_count());
+ end;
+ create temp trigger r2 instead of insert on v2 for each row begin
+ insert into n2 values (NULL, last_statement_change_count());
+ insert into t2 values (1000+NEW.k);
+ insert into n2 values (NULL, last_statement_change_count());
+ update t0 set x=x*100 where x=0;
+ insert into n2 values (NULL, last_statement_change_count());
+ delete from t0 where x=2;
+ insert into n2 values (NULL, last_statement_change_count());
+ end;
+ insert into t1 values (77);
+ select last_statement_change_count();
+ }
+} {0 1}
+
+do_test laststmtchanges-5.2 {
+ catchsql {
+ delete from t1 where k=88;
+ select last_statement_change_count();
+ }
+} {0 0}
+
+do_test laststmtchanges-5.3 {
+ catchsql {
+ insert into v1 values (5);
+ select last_statement_change_count();
+ }
+} {0 0}
+
+do_test laststmtchanges-5.4 {
+ catchsql {
+ select n from n1;
+ }
+} {0 {0 5 1 0}}
+
+do_test laststmtchanges-5.5 {
+ catchsql {
+ select n from n2;
+ }
+} {0 {0 1 0 3}}
+
+finish_test
+
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