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+# 2020 April 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.
+#
+#***********************************************************************
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix upfrom2
+
+# Test cases:
+#
+# 1.*: Test that triggers are fired correctly for UPDATE FROM statements,
+# and only once for each row. Except for INSTEAD OF triggers on
+# views - these are fired once for each row returned by the join,
+# including duplicates.
+#
+# 2.*: Test adding ORDER BY and LIMIT clauses with UPDATE FROM statements.
+#
+# 5.*: Test that specifying the target table name or alias in the FROM
+# clause of an UPDATE statement is an error.
+#
+
+foreach {tn wo} {
+ 1 ""
+ 2 "WITHOUT ROWID"
+} {
+ reset_db
+
+ eval [string map [list %WO% $wo %TN% $tn] {
+ do_execsql_test 1.%TN%.0 {
+ CREATE TABLE log(t TEXT);
+ CREATE TABLE t1(x PRIMARY KEY, y, z UNIQUE) %WO%;
+ CREATE INDEX t1y ON t1(y);
+
+ INSERT INTO t1 VALUES(1, 'i', 'one');
+ INSERT INTO t1 VALUES(2, 'ii', 'two');
+ INSERT INTO t1 VALUES(3, 'iii', 'three');
+ INSERT INTO t1 VALUES(4, 'iv', 'four');
+
+ CREATE TRIGGER tr1 BEFORE UPDATE ON t1 BEGIN
+ INSERT INTO log VALUES(old.z || '->' || new.z);
+ END;
+ CREATE TRIGGER tr2 AFTER UPDATE ON t1 BEGIN
+ INSERT INTO log VALUES(old.y || '->' || new.y);
+ END;
+ }
+
+ do_execsql_test 1.%TN%.1 {
+ WITH data(k, v) AS (
+ VALUES(3, 'thirty'), (1, 'ten')
+ )
+ UPDATE t1 SET z=v FROM data WHERE x=k;
+
+ SELECT * FROM t1;
+ SELECT * FROM log;
+ } {
+ 1 i ten 2 ii two 3 iii thirty 4 iv four
+ one->ten i->i
+ three->thirty iii->iii
+ }
+
+ do_execsql_test 1.%TN%.2 {
+ CREATE TABLE t2(a, b);
+ CREATE TABLE t3(k, v);
+
+ INSERT INTO t3 VALUES(5, 'v');
+ INSERT INTO t3 VALUES(12, 'xii');
+
+ INSERT INTO t2 VALUES(2, 12);
+ INSERT INTO t2 VALUES(3, 5);
+
+ DELETE FROM log;
+ UPDATE t1 SET y=v FROM t2, t3 WHERE t1.x=t2.a AND t3.k=t2.b;
+
+ SELECT * FROM t1;
+ SELECT * FROM log;
+ } {
+ 1 i ten 2 xii two 3 v thirty 4 iv four
+ two->two ii->xii
+ thirty->thirty iii->v
+ }
+
+ do_execsql_test 1.%TN%.3 {
+ DELETE FROM log;
+ WITH data(k, v) AS (
+ VALUES(1, 'seven'), (1, 'eight'), (2, 'eleven'), (2, 'twelve')
+ )
+ UPDATE t1 SET z=v FROM data WHERE x=k;
+
+ SELECT * FROM t1;
+ SELECT * FROM log;
+ } {
+ 1 i eight 2 xii twelve 3 v thirty 4 iv four
+ ten->eight i->i
+ two->twelve xii->xii
+ }
+
+ do_test 1.%TN%.4 { db changes } {2}
+
+ do_execsql_test 1.%TN%.5 {
+ CREATE VIEW v1 AS SELECT * FROM t1;
+ CREATE TRIGGER v1tr INSTEAD OF UPDATE ON v1 BEGIN
+ UPDATE t1 SET y=new.y, z=new.z WHERE x=new.x;
+ END;
+
+ DELETE FROM log;
+ WITH data(k, v) AS (
+ VALUES(3, 'thirteen'), (3, 'fourteen'), (4, 'fifteen'), (4, 'sixteen')
+ )
+ UPDATE v1 SET z=v FROM data WHERE x=k;
+ }
+
+ do_execsql_test 1.%TN%.6 {
+ SELECT * FROM v1;
+ SELECT * FROM log;
+ } {
+ 1 i eight 2 xii twelve 3 v fourteen 4 iv sixteen
+ thirty->thirteen v->v
+ thirteen->fourteen v->v
+ four->fifteen iv->iv
+ fifteen->sixteen iv->iv
+ }
+
+ #--------------------------------------------------------------
+
+ do_execsql_test 1.%TN%.7 {
+ CREATE TABLE o1(w, x, y, z UNIQUE, PRIMARY KEY(w, x)) %WO%;
+ CREATE INDEX o1y ON t1(y);
+
+ INSERT INTO o1 VALUES(0, 0, 'i', 'one');
+ INSERT INTO o1 VALUES(0, 1, 'ii', 'two');
+ INSERT INTO o1 VALUES(1, 0, 'iii', 'three');
+ INSERT INTO o1 VALUES(1, 1, 'iv', 'four');
+
+ CREATE TRIGGER tro1 BEFORE UPDATE ON o1 BEGIN
+ INSERT INTO log VALUES(old.z || '->' || new.z);
+ END;
+ CREATE TRIGGER tro2 AFTER UPDATE ON o1 BEGIN
+ INSERT INTO log VALUES(old.y || '->' || new.y);
+ END;
+ }
+
+ do_execsql_test 1.%TN%.8 {
+ DELETE FROM log;
+ WITH data(k, v) AS (
+ VALUES(3, 'thirty'), (1, 'ten')
+ )
+ UPDATE o1 SET z=v FROM data WHERE (1+x+w*2)=k;
+
+ SELECT * FROM o1;
+ SELECT * FROM log;
+ } {
+ 0 0 i ten 0 1 ii two 1 0 iii thirty 1 1 iv four
+ one->ten i->i
+ three->thirty iii->iii
+ }
+
+ do_execsql_test 1.%TN%.9 {
+ DELETE FROM log;
+ UPDATE o1 SET y=v FROM t2, t3 WHERE (1+o1.w*2+o1.x)=t2.a AND t3.k=t2.b;
+
+ SELECT * FROM o1;
+ SELECT * FROM log;
+ } {
+ 0 0 i ten 0 1 xii two 1 0 v thirty 1 1 iv four
+ two->two ii->xii
+ thirty->thirty iii->v
+ }
+
+ do_execsql_test 1.%TN%.10 {
+ DELETE FROM log;
+ WITH data(k, v) AS (
+ VALUES(1, 'seven'), (1, 'eight'), (2, 'eleven'), (2, 'twelve')
+ )
+ UPDATE o1 SET z=v FROM data WHERE (1+w*2+x)=k;
+
+ SELECT * FROM o1;
+ SELECT * FROM log;
+ } {
+ 0 0 i eight 0 1 xii twelve 1 0 v thirty 1 1 iv four
+ ten->eight i->i
+ two->twelve xii->xii
+ }
+
+ do_test 1.%TN%.11 { db changes } {2}
+
+ do_execsql_test 1.%TN%.12 {
+ CREATE VIEW w1 AS SELECT * FROM o1;
+ CREATE TRIGGER w1tr INSTEAD OF UPDATE ON w1 BEGIN
+ UPDATE o1 SET y=new.y, z=new.z WHERE w=new.w AND x=new.x;
+ END;
+
+ DELETE FROM log;
+ WITH data(k, v) AS (
+ VALUES(3, 'thirteen'), (3, 'fourteen'), (4, 'fifteen'), (4, 'sixteen')
+ )
+ UPDATE w1 SET z=v FROM data WHERE (1+w*2+x)=k;
+ }
+
+ do_execsql_test 1.%TN%.13 {
+ SELECT * FROM w1;
+ SELECT * FROM log;
+ } {
+ 0 0 i eight 0 1 xii twelve 1 0 v fourteen 1 1 iv sixteen
+ thirty->thirteen v->v
+ thirteen->fourteen v->v
+ four->fifteen iv->iv
+ fifteen->sixteen iv->iv
+ }
+
+}]
+}
+
+ifcapable update_delete_limit {
+foreach {tn wo} {
+ 1 ""
+ 2 "WITHOUT ROWID"
+} {
+ reset_db
+
+eval [string map [list %WO% $wo %TN% $tn] {
+ do_execsql_test 2.%TN%.1 {
+ CREATE TABLE x1(a INTEGER PRIMARY KEY, b) %WO%;
+ INSERT INTO x1 VALUES
+ (1, 'one'), (2, 'two'), (3, 'three'), (4, 'four'),
+ (5, 'five'), (6, 'six'), (7, 'seven'), (8, 'eight');
+ }
+
+ do_execsql_test 2.%TN%.2 {
+ CREATE TABLE data1(x, y);
+ INSERT INTO data1 VALUES
+ (1, 'eleven'), (1, 'twenty-one'), (2, 'twelve'), (2, 'twenty-two'),
+ (3, 'thirteen'), (3, 'twenty-three'), (4, 'fourteen'), (4, 'twenty-four');
+ }
+
+ do_execsql_test 2.%TN%.3 {
+ UPDATE x1 SET b=y FROM data1 WHERE a=x ORDER BY a LIMIT 3;
+ SELECT * FROM x1;
+ } {
+ 1 eleven 2 twelve 3 thirteen 4 four 5 five 6 six 7 seven 8 eight
+ }
+
+ do_execsql_test 2.%TN%.4 {
+ UPDATE x1 SET b=b||y FROM data1 WHERE a=x ORDER BY b LIMIT 3;
+ SELECT * FROM x1;
+ } {
+ 1 eleveneleven 2 twelve 3 thirteenthirteen 4 fourfourteen
+ 5 five 6 six 7 seven 8 eight
+ }
+
+ do_catchsql_test 2.%TN%.5 {
+ UPDATE x1 SET b=b||b ORDER BY b;
+ } {1 {ORDER BY without LIMIT on UPDATE}}
+ do_catchsql_test 2.%TN%.6 {
+ UPDATE x1 SET b=b||y FROM data1 WHERE a=x ORDER BY b;
+ } {1 {ORDER BY without LIMIT on UPDATE}}
+
+ #-----------------------------------------------------------------------
+
+ do_execsql_test 2.%TN%.6 {
+ DROP TABLE x1;
+ CREATE TABLE x1(u, v, b, PRIMARY KEY(u, v)) %WO%;
+ INSERT INTO x1 VALUES
+ (0, 1, 'one'), (1, 0, 'two'), (1, 1, 'three'), (2, 0, 'four'),
+ (2, 1, 'five'), (3, 0, 'six'), (3, 1, 'seven'), (4, 0, 'eight');
+ }
+
+ do_execsql_test 2.%TN%.7 {
+ UPDATE x1 SET b=y FROM data1 WHERE (u*2+v)=x ORDER BY u, v LIMIT 3;
+ SELECT * FROM x1;
+ } {
+ 0 1 eleven 1 0 twelve 1 1 thirteen 2 0 four
+ 2 1 five 3 0 six 3 1 seven 4 0 eight
+ }
+
+ do_execsql_test 2.%TN%.8 {
+ UPDATE x1 SET b=b||y FROM data1 WHERE (u*2+v)=x ORDER BY b LIMIT 3;
+ SELECT * FROM x1;
+ } {
+ 0 1 eleveneleven 1 0 twelve 1 1 thirteenthirteen 2 0 fourfourteen
+ 2 1 five 3 0 six 3 1 seven 4 0 eight
+ }
+
+
+}]
+}}
+
+reset_db
+do_execsql_test 3.0 {
+ CREATE TABLE data(x, y, z);
+ CREATE VIEW t1 AS SELECT * FROM data;
+ CREATE TRIGGER t1_insert INSTEAD OF INSERT ON t1 BEGIN
+ INSERT INTO data VALUES(new.x, new.y, new.z);
+ END;
+ CREATE TRIGGER t1_update INSTEAD OF UPDATE ON t1 BEGIN
+ INSERT INTO log VALUES(old.z || '->' || new.z);
+ END;
+
+ CREATE TABLE log(t TEXT);
+
+ INSERT INTO t1 VALUES(1, 'i', 'one');
+ INSERT INTO t1 VALUES(2, 'ii', 'two');
+ INSERT INTO t1 VALUES(3, 'iii', 'three');
+ INSERT INTO t1 VALUES(4, 'iv', 'four');
+}
+
+do_execsql_test 3.1 {
+ WITH input(k, v) AS (
+ VALUES(3, 'thirty'), (1, 'ten')
+ )
+ UPDATE t1 SET z=v FROM input WHERE x=k;
+}
+
+foreach {tn sql} {
+ 2 {
+ CREATE TABLE x1(a INT PRIMARY KEY, b, c) WITHOUT ROWID;
+ }
+ 1 {
+ CREATE TABLE x1(a INTEGER PRIMARY KEY, b, c);
+ }
+ 3 {
+ CREATE TABLE x1(a INT PRIMARY KEY, b, c);
+ }
+} {
+
+ reset_db
+ execsql $sql
+
+ do_execsql_test 4.$tn.0 {
+ INSERT INTO x1 VALUES(1, 1, 1);
+ INSERT INTO x1 VALUES(2, 2, 2);
+ INSERT INTO x1 VALUES(3, 3, 3);
+ INSERT INTO x1 VALUES(4, 4, 4);
+ INSERT INTO x1 VALUES(5, 5, 5);
+ CREATE TABLE map(o, t);
+ INSERT INTO map VALUES(3, 30), (4, 40), (1, 10);
+ }
+
+ do_execsql_test 4.$tn.1 {
+ UPDATE x1 SET a=t FROM map WHERE a=o;
+ SELECT * FROM x1 ORDER BY a;
+ } {2 2 2 5 5 5 10 1 1 30 3 3 40 4 4}
+}
+
+reset_db
+do_execsql_test 5.0 {
+ CREATE TABLE x1(a, b, c);
+ CREATE TABLE x2(a, b, c);
+}
+
+foreach {tn update nm} {
+ 1 "UPDATE x1 SET a=5 FROM x1" x1
+ 2 "UPDATE x1 AS grapes SET a=5 FROM x1 AS grapes" grapes
+ 3 "UPDATE x1 SET a=5 FROM x2, x1" x1
+ 4 "UPDATE x1 AS grapes SET a=5 FROM x2, x1 AS grapes" grapes
+} {
+ do_catchsql_test 5.$tn $update \
+ "1 {target object/alias may not appear in FROM clause: $nm}"
+}
+
+#--------------------------------------------------------------------------
+reset_db
+do_execsql_test 6.0 {
+ CREATE TABLE t1(a);
+}
+
+do_execsql_test 6.1 {
+ UPDATE t1 SET a = 1 FROM (
+ SELECT * FROM t1
+ )
+} {}
+do_execsql_test 6.2 {
+ UPDATE t1 SET a = 1 FROM (
+ SELECT * FROM t1 UNION ALL SELECT * FROM t1
+ )
+} {}
+
+# 2022-03-21
+# https://sqlite.org/forum/forumpost/929168fdd6
+#
+reset_db
+do_execsql_test 7.0 {
+ CREATE TABLE t1(a);
+ INSERT INTO t1(a) VALUES(11),(22),(33),(44),(55);
+ CREATE VIEW t2(b,c) AS SELECT a, COUNT(*) OVER () FROM t1;
+ CREATE TABLE t3(x,y);
+ CREATE TRIGGER t2r1 INSTEAD OF UPDATE ON t2 BEGIN
+ INSERT INTO t3(x,y) VALUES(new.b,new.c);
+ END;
+ SELECT * FROM t2;
+} {11 5 22 5 33 5 44 5 55 5}
+do_execsql_test 7.1 {
+ UPDATE t2 SET c=t1.a FROM t1 WHERE t2.b=t1.a;
+ SELECT * FROM t3;
+} {11 11 22 22 33 33 44 44 55 55}
+
+
+finish_test
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