245 lines
7.6 KiB
Plaintext
245 lines
7.6 KiB
Plaintext
# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# Tests to make sure that value returned by last_statement_change_count()
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# (LSCC) is updated properly, especially inside triggers
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#
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# Note 1: LSCC remains constant within a statement and only updates once
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# the statement is finished (triggers count as part of statement)
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# Note 2: LSCC is changed within the context of a trigger
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# much like last_insert_rowid() (see lastinsert.test),
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# but is restored once the trigger exits
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# Note 3: LSCC is not changed by a change to a view (since everything
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# is done within instead of trigger context)
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# ----------------------------------------------------------------------------
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# 1.x - basic tests (no triggers)
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# LSCC set properly after insert
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do_test laststmtchanges-1.1 {
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catchsql {
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create table t0 (x);
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insert into t0 values (1);
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insert into t0 values (1);
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insert into t0 values (2);
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insert into t0 values (2);
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insert into t0 values (1);
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insert into t0 values (1);
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insert into t0 values (1);
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insert into t0 values (2);
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select last_statement_change_count();
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}
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} {0 1}
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# LSCC set properly after update
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do_test laststmtchanges-1.2 {
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catchsql {
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update t0 set x=3 where x=1;
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select last_statement_change_count();
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}
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} {0 5}
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# LSCC unchanged within an update statement
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do_test laststmtchanges-1.3 {
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catchsql {
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update t0 set x=x+last_statement_change_count() where x=3;
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select count() from t0 where x=8;
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}
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} {0 5}
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# LSCC set properly after update on table where no rows changed
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do_test laststmtchanges-1.4 {
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catchsql {
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update t0 set x=77 where x=88;
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select last_statement_change_count();
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}
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} {0 0}
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# LSCC set properly after delete from table
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do_test laststmtchanges-1.5 {
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catchsql {
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delete from t0 where x=2;
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select last_statement_change_count();
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}
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} {0 3}
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# ----------------------------------------------------------------------------
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# 2.x - tests with after insert trigger
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# LSCC changed properly after insert into table containing after trigger
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do_test laststmtchanges-2.1 {
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catchsql {
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create table t1 (k integer primary key);
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create table t2 (k integer primary key, v1, v2);
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create trigger r1 after insert on t1 for each row begin
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insert into t2 values (NULL, last_statement_change_count(), NULL);
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update t0 set x=x;
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update t2 set v2=last_statement_change_count();
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end;
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insert into t1 values (77);
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select last_statement_change_count();
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}
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} {0 1}
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# LSCC unchanged upon entry into after insert trigger
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do_test laststmtchanges-2.2 {
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catchsql {
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select v1 from t2;
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}
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} {0 3}
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# LSCC changed properly by update within context of after insert trigger
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do_test laststmtchanges-2.3 {
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catchsql {
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select v2 from t2;
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}
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} {0 5}
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# ----------------------------------------------------------------------------
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# 3.x - tests with after update trigger
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# LSCC changed properly after update into table containing after trigger
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do_test laststmtchanges-3.1 {
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catchsql {
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drop trigger r1;
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delete from t2; delete from t2;
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create trigger r1 after update on t1 for each row begin
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insert into t2 values (NULL, last_statement_change_count(), NULL);
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delete from t0 where oid=1 or oid=2;
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update t2 set v2=last_statement_change_count();
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end;
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update t1 set k=k;
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select last_statement_change_count();
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}
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} {0 1}
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# LSCC unchanged upon entry into after update trigger
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do_test laststmtchanges-3.2 {
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catchsql {
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select v1 from t2;
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}
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} {0 0}
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# LSCC changed properly by delete within context of after update trigger
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do_test laststmtchanges-3.3 {
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catchsql {
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select v2 from t2;
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}
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} {0 2}
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# ----------------------------------------------------------------------------
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# 4.x - tests with before delete trigger
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# LSCC changed properly on delete from table containing before trigger
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do_test laststmtchanges-4.1 {
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catchsql {
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drop trigger r1;
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delete from t2; delete from t2;
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create trigger r1 before delete on t1 for each row begin
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insert into t2 values (NULL, last_statement_change_count(), NULL);
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insert into t0 values (5);
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update t2 set v2=last_statement_change_count();
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end;
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delete from t1;
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select last_statement_change_count();
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}
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} {0 1}
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# LSCC unchanged upon entry into before delete trigger
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do_test laststmtchanges-4.2 {
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catchsql {
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select v1 from t2;
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}
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} {0 0}
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# LSCC changed properly by insert within context of before delete trigger
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do_test laststmtchanges-4.3 {
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catchsql {
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select v2 from t2;
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}
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} {0 1}
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# ----------------------------------------------------------------------------
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# 5.x - complex tests with temporary tables and nested instead of triggers
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do_test laststmtchanges-5.1 {
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catchsql {
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drop table t0; drop table t1; drop table t2;
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create temp table t0(x);
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create temp table t1 (k integer primary key);
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create temp table t2 (k integer primary key);
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create temp view v1 as select * from t1;
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create temp view v2 as select * from t2;
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create temp table n1 (k integer primary key, n);
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create temp table n2 (k integer primary key, n);
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insert into t0 values (1);
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insert into t0 values (2);
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insert into t0 values (1);
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insert into t0 values (1);
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insert into t0 values (1);
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insert into t0 values (2);
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insert into t0 values (2);
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insert into t0 values (1);
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create temp trigger r1 instead of insert on v1 for each row begin
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insert into n1 values (NULL, last_statement_change_count());
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update t0 set x=x*10 where x=1;
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insert into n1 values (NULL, last_statement_change_count());
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insert into t1 values (NEW.k);
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insert into n1 values (NULL, last_statement_change_count());
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update t0 set x=x*10 where x=0;
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insert into v2 values (100+NEW.k);
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insert into n1 values (NULL, last_statement_change_count());
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end;
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create temp trigger r2 instead of insert on v2 for each row begin
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insert into n2 values (NULL, last_statement_change_count());
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insert into t2 values (1000+NEW.k);
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insert into n2 values (NULL, last_statement_change_count());
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update t0 set x=x*100 where x=0;
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insert into n2 values (NULL, last_statement_change_count());
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delete from t0 where x=2;
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insert into n2 values (NULL, last_statement_change_count());
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end;
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insert into t1 values (77);
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select last_statement_change_count();
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}
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} {0 1}
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do_test laststmtchanges-5.2 {
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catchsql {
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delete from t1 where k=88;
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select last_statement_change_count();
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}
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} {0 0}
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do_test laststmtchanges-5.3 {
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catchsql {
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insert into v1 values (5);
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select last_statement_change_count();
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}
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} {0 0}
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do_test laststmtchanges-5.4 {
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catchsql {
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select n from n1;
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}
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} {0 {0 5 1 0}}
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do_test laststmtchanges-5.5 {
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catchsql {
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select n from n2;
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}
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} {0 {0 1 0 3}}
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finish_test
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