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

Artifact 8883693952f6d7fb5f754dbf1d694ed780aa883027bef04cb1fb99a3b88c9272:


# 2018 September 30
#
# 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 altertab2

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

ifcapable fts5 {
  do_execsql_test 1.0 {
    CREATE TABLE rr(a, b);
    CREATE VIRTUAL TABLE ff USING fts5(a, b);
    CREATE TRIGGER tr1 AFTER INSERT ON rr BEGIN
      INSERT INTO ff VALUES(new.a, new.b);
    END;
    INSERT INTO rr VALUES('hello', 'world');
    SELECT * FROM ff;
  } {hello world}

  do_execsql_test 1.1 {
    ALTER TABLE ff RENAME TO ffff;
  }

  do_execsql_test 1.2 {
    INSERT INTO rr VALUES('in', 'tcl');
    SELECT * FROM ffff;
  } {hello world in tcl}
}

#-------------------------------------------------------------------------
# Check that table names that appear in REFERENCES clauses are updated
# when a table is renamed unless:
#
#   a) "PRAGMA legacy_alter_table" is true, and
#   b) "PRAGMA foreign_keys" is false.
#
do_execsql_test 2.0 {
  CREATE TABLE p1(a PRIMARY KEY, b);
  CREATE TABLE c1(x REFERENCES p1);
  CREATE TABLE c2(x, FOREIGN KEY (x) REFERENCES p1);
  CREATE TABLE c3(x, FOREIGN KEY (x) REFERENCES p1(a));
}

do_execsql_test 2.1 {
  ALTER TABLE p1 RENAME TO p2;
  SELECT sql FROM sqlite_master WHERE name LIKE 'c%';
} {
  {CREATE TABLE c1(x REFERENCES "p2")}
  {CREATE TABLE c2(x, FOREIGN KEY (x) REFERENCES "p2")}
  {CREATE TABLE c3(x, FOREIGN KEY (x) REFERENCES "p2"(a))}
}

do_execsql_test 2.2 {
  PRAGMA legacy_alter_table = 1;
  ALTER TABLE p2 RENAME TO p3;
  SELECT sql FROM sqlite_master WHERE name LIKE 'c%';
} {
  {CREATE TABLE c1(x REFERENCES "p2")}
  {CREATE TABLE c2(x, FOREIGN KEY (x) REFERENCES "p2")}
  {CREATE TABLE c3(x, FOREIGN KEY (x) REFERENCES "p2"(a))}
}

do_execsql_test 2.3 {
  ALTER TABLE p3 RENAME TO p2;
  PRAGMA foreign_keys = 1;
  ALTER TABLE p2 RENAME TO p3;
  SELECT sql FROM sqlite_master WHERE name LIKE 'c%';
} {
  {CREATE TABLE c1(x REFERENCES "p3")}
  {CREATE TABLE c2(x, FOREIGN KEY (x) REFERENCES "p3")}
  {CREATE TABLE c3(x, FOREIGN KEY (x) REFERENCES "p3"(a))}
}

#-------------------------------------------------------------------------
# Table name in WITH clauses that are part of views or triggers.
#
foreach {tn schema} {
  1 {
    CREATE TABLE log_entry(col1, y);
    CREATE INDEX i1 ON log_entry(col1);
  }

  2 {
    CREATE TABLE t1(a, b, c);
    CREATE TABLE t2(x);
    CREATE TABLE log_entry(col1);
    CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
      INSERT INTO t2 SELECT col1 FROM log_entry;
    END;
  }

  3 {
    CREATE TABLE t1(a, b, c);
    CREATE TABLE t2(x);
    CREATE TABLE log_entry(col1);
    CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
      INSERT INTO t2
        WITH xyz(x) AS (SELECT col1 FROM log_entry)
        SELECT x FROM xyz;
    END;
  }

  4 {
    CREATE TABLE log_entry(col1);
    CREATE VIEW ttt AS
        WITH xyz(x) AS (SELECT col1 FROM log_entry)
        SELECT x FROM xyz;
  }
} {
  reset_db
  do_execsql_test 3.$tn.1 $schema
  set expect [db eval "SELECT sql FROM sqlite_master"]
  set expect [string map {log_entry {"newname"}} $expect]

  do_execsql_test 3.$tn.2 {
    ALTER TABLE log_entry RENAME TO newname;
    SELECT sql FROM sqlite_master;
  } $expect

  reset_db
  do_execsql_test 3.$tn.3 $schema
  set expect [db eval "SELECT sql FROM sqlite_master"]
  set expect [string map {col1 newname} $expect]

  do_execsql_test 3.$tn.4 {
    ALTER TABLE log_entry RENAME col1 TO newname;
    SELECT sql FROM sqlite_master;
  } $expect
}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 4.0 {
  CREATE TABLE t1(a,b,c,d,e,f);
  CREATE TRIGGER r1 AFTER INSERT ON t1 WHEN new.a NOT NULL BEGIN
    UPDATE t1 SET (c,d)=(a,b);
  END;
}

do_execsql_test 4.1 {
  ALTER TABLE t1 RENAME TO t1x;
  SELECT sql FROM sqlite_master WHERE type = 'trigger';
} {
{CREATE TRIGGER r1 AFTER INSERT ON "t1x" WHEN new.a NOT NULL BEGIN
    UPDATE "t1x" SET (c,d)=(a,b);
  END}
}

do_execsql_test 4.2 {
  ALTER TABLE t1x RENAME a TO aaa;
  SELECT sql FROM sqlite_master WHERE type = 'trigger';
} {
{CREATE TRIGGER r1 AFTER INSERT ON "t1x" WHEN new.aaa NOT NULL BEGIN
    UPDATE "t1x" SET (c,d)=(aaa,b);
  END}
}

do_execsql_test 4.3 {
  ALTER TABLE t1x RENAME d TO ddd;
  SELECT sql FROM sqlite_master WHERE type = 'trigger';
} {
{CREATE TRIGGER r1 AFTER INSERT ON "t1x" WHEN new.aaa NOT NULL BEGIN
    UPDATE "t1x" SET (c,ddd)=(aaa,b);
  END}
}

#-------------------------------------------------------------------------
ifcapable windowfunc {
do_execsql_test 5.0 {
  CREATE TABLE t2(a);
  CREATE TRIGGER r2 AFTER INSERT ON t2 WHEN new.a NOT NULL BEGIN
    SELECT a, sum(a) OVER w1 FROM t2
      WINDOW w1 AS (
        PARTITION BY a ORDER BY a 
        ROWS BETWEEN 2 PRECEDING AND 3 FOLLOWING
      ),
      w2 AS (
        PARTITION BY a
        ORDER BY rowid ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
      );
  END;
} {}

do_execsql_test 5.0.1 {
  INSERT INTO t2 VALUES(1);
} {}

do_execsql_test 5.1 {
  ALTER TABLE t2 RENAME TO t2x;
  SELECT sql FROM sqlite_master WHERE name = 'r2';
} {
  {CREATE TRIGGER r2 AFTER INSERT ON "t2x" WHEN new.a NOT NULL BEGIN
    SELECT a, sum(a) OVER w1 FROM "t2x"
      WINDOW w1 AS (
        PARTITION BY a ORDER BY a 
        ROWS BETWEEN 2 PRECEDING AND 3 FOLLOWING
      ),
      w2 AS (
        PARTITION BY a
        ORDER BY rowid ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
      );
  END}
}

do_execsql_test 5.2 {
  ALTER TABLE t2x RENAME a TO aaaa;
  SELECT sql FROM sqlite_master WHERE name = 'r2';
} {
  {CREATE TRIGGER r2 AFTER INSERT ON "t2x" WHEN new.aaaa NOT NULL BEGIN
    SELECT aaaa, sum(aaaa) OVER w1 FROM "t2x"
      WINDOW w1 AS (
        PARTITION BY aaaa ORDER BY aaaa 
        ROWS BETWEEN 2 PRECEDING AND 3 FOLLOWING
      ),
      w2 AS (
        PARTITION BY aaaa
        ORDER BY rowid ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
      );
  END}
}

do_execsql_test 5.3 {
  INSERT INTO t2x VALUES(1);
} {}
} ;# windowfunc

#-------------------------------------------------------------------------

do_execsql_test 6.0 {
  CREATE TABLE t3(a,b,c,d);
  CREATE TRIGGER r3 AFTER INSERT ON t3 WHEN new.a NOT NULL BEGIN
    SELECT a,b,c FROM t3 EXCEPT SELECT a,b,c FROM t3 ORDER BY a;
    SELECT rowid, * FROM t3;
  END;
} {}

do_execsql_test 6.1 {
  ALTER TABLE t3 RENAME TO t3x;
  SELECT sql FROM sqlite_master WHERE name = 'r3';
} {
  {CREATE TRIGGER r3 AFTER INSERT ON "t3x" WHEN new.a NOT NULL BEGIN
    SELECT a,b,c FROM "t3x" EXCEPT SELECT a,b,c FROM "t3x" ORDER BY a;
    SELECT rowid, * FROM "t3x";
  END}
}

do_execsql_test 6.2 {
  ALTER TABLE t3x RENAME a TO abcd;
  SELECT sql FROM sqlite_master WHERE name = 'r3';
} {
  {CREATE TRIGGER r3 AFTER INSERT ON "t3x" WHEN new.abcd NOT NULL BEGIN
    SELECT abcd,b,c FROM "t3x" EXCEPT SELECT abcd,b,c FROM "t3x" ORDER BY abcd;
    SELECT rowid, * FROM "t3x";
  END}
}

#-------------------------------------------------------------------------
reset_db

do_execsql_test 7.0 {
  CREATE TABLE t1(a,b,c,d,e,f);
  INSERT INTO t1 VALUES(1,2,3,4,5,6);
  CREATE TABLE t2(x,y,z);
}

do_execsql_test 7.1 {
  SELECT a,b,c FROM t1 UNION SELECT d,e,f FROM t1 ORDER BY b,c;
} {1 2 3 4 5 6}

do_execsql_test 7.2 {
  CREATE TRIGGER r1 AFTER INSERT ON t1 BEGIN
    INSERT INTO t2
    SELECT a,b,c FROM t1 UNION SELECT d,e,f FROM t1 ORDER BY b,c;
  END;
  INSERT INTO t1 VALUES(2,3,4,5,6,7);
  SELECT * FROM t2;
} {1 2 3  2 3 4  4 5 6  5 6 7}

do_execsql_test 7.3 {
  ALTER TABLE t1 RENAME TO xyzzy;
  SELECT sql FROM sqlite_master WHERE name='r1'
} {
  {CREATE TRIGGER r1 AFTER INSERT ON "xyzzy" BEGIN
    INSERT INTO t2
    SELECT a,b,c FROM "xyzzy" UNION SELECT d,e,f FROM "xyzzy" ORDER BY b,c;
  END}
}

do_execsql_test 7.3 {
  ALTER TABLE xyzzy RENAME c TO ccc;
  SELECT sql FROM sqlite_master WHERE name='r1'
} {
  {CREATE TRIGGER r1 AFTER INSERT ON "xyzzy" BEGIN
    INSERT INTO t2
    SELECT a,b,ccc FROM "xyzzy" UNION SELECT d,e,f FROM "xyzzy" ORDER BY b,ccc;
  END}
}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 8.0 {
  CREATE TABLE t1(a, b, c); 
  CREATE TABLE t2(a, b, c); 
  CREATE TABLE t3(d, e, f);
  CREATE VIEW v1 AS SELECT * FROM t1;
  CREATE TRIGGER tr AFTER INSERT ON t3 BEGIN
    UPDATE t2 SET a = new.d;
    SELECT a, b, c FROM v1;
  END;
}

do_execsql_test 8.1 {
  INSERT INTO t3 VALUES(1, 2, 3);
}

# The following ALTER TABLE fails as if column "t1.a" is renamed the "a"
# in the "SELECT a, b, c FROM v1" within the trigger can no longer be
# resolved. But at one point there was a bug allowing the ALTER TABLE
# succeed. Which meant the subsequent INSERT statement would fail.
do_catchsql_test 8.2 {
  ALTER TABLE t1 RENAME a TO aaa;
} {1 {error in trigger tr after rename: no such column: a}}
do_execsql_test 8.3 {
  INSERT INTO t3 VALUES(4, 5, 6);
}

do_execsql_test 8.4 {
  CREATE TABLE t4(a, b);
  CREATE VIEW v4 AS SELECT * FROM t4 WHERE (a=1 AND 0) OR b=2;
}

# Do not rename branches of an expression tree that is optimized out by
# the AND optimization.
#
do_execsql_test 8.5 {
  ALTER TABLE t4 RENAME a TO c;
  SELECT sql FROM sqlite_master WHERE name = 'v4'
} {{CREATE VIEW v4 AS SELECT * FROM t4 WHERE (a=1 AND 0) OR b=2}}
#                "a" is not renamed to "c" ---^

# 2019-06-10 https://www.sqlite.org/src/info/533010b8cacebe82
reset_db
do_execsql_test 8.6 {
  CREATE TABLE t0(c0);
  CREATE INDEX i0 ON t0(LIKELIHOOD(1,2) AND 0);
  ALTER TABLE t0 RENAME TO t1;
  SELECT sql FROM sqlite_master WHERE name='i0';
} {{CREATE INDEX i0 ON "t1"(LIKELIHOOD(1,2) AND 0)}}

finish_test