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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact 5d06ff19d9e6969e574a2e662a531dd0c67801a8:


# 2016-08-18
#
# 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.
#
#***********************************************************************
# The focus of this file is vector assignments in the SET clause of
# an UPDATE statement.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix rowvalue7

do_execsql_test 1.1 {
  CREATE TABLE t1(a,b,c,d);
  CREATE INDEX t1x ON t1(a,b);
  INSERT INTO t1(a,b,c,d) VALUES(1,2,0,0),(3,4,0,0),(5,6,0,0);
  CREATE TABLE t2(w,x,y,z);
  CREATE INDEX t2x ON t2(w,x);
  INSERT INTO t2(w,x,y,z) VALUES(1,2,11,22),(8,9,88,99),(3,5,33,55),(5,6,55,66);

  SELECT *,'|' FROM t1 ORDER BY a;
} {1 2 0 0 | 3 4 0 0 | 5 6 0 0 |}

do_execsql_test 1.2 {
  UPDATE t1 SET (c,d) = (SELECT y,z FROM t2 WHERE (w,x)=(a,b));
  SELECT *,'|' FROM t1 ORDER BY a;
} {1 2 11 22 | 3 4 {} {} | 5 6 55 66 |}

do_execsql_test 1.3 {
  UPDATE t1 SET (c,d) = (SELECT y,z FROM t2 WHERE w=a);
  SELECT *,'|' FROM t1 ORDER BY a;
} {1 2 11 22 | 3 4 33 55 | 5 6 55 66 |}

do_execsql_test 1.4 {
  UPDATE t1 SET (c) = 99 WHERE a=3;
  SELECT *,'|' FROM t1 ORDER BY a;
} {1 2 11 22 | 3 4 99 55 | 5 6 55 66 |}

do_execsql_test 1.5 {
  UPDATE t1 SET b = 8, (c,d) = (SELECT 123,456) WHERE a=3;
  SELECT *,'|' FROM t1 ORDER BY a;
} {1 2 11 22 | 3 8 123 456 | 5 6 55 66 |}

do_catchsql_test 2.1 {
  UPDATE t1 SET (c,d) = (SELECT x,y,z FROM t2 WHERE w=a);
} {1 {2 columns assigned 3 values}}

do_catchsql_test 2.2 {
  UPDATE t1 SET (b,c,d) = (SELECT x,y FROM t2 WHERE w=a);
} {1 {3 columns assigned 2 values}}

finish_test