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

Artifact 75f31403db0f4ae98391cff3ae396b6346a68913:


# 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.
#
#***********************************************************************
#
# This file tests creating and dropping triggers, and interaction thereof
# with the database COMMIT/ROLLBACK logic.
#
# 1. CREATE and DROP TRIGGER tests
# trig-1.1: Error if table does not exist
# trig-1.2: Error if trigger already exists
# trig-1.3: Created triggers are deleted if the transaction is rolled back
# trig-1.4: DROP TRIGGER removes trigger
# trig-1.5: Dropped triggers are restored if the transaction is rolled back
# trig-1.6: Error if dropped trigger doesn't exist
# trig-1.7: Dropping the table automatically drops all triggers
# trig-1.8: A trigger created on a TEMP table is not inserted into sqlite_master
#

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

do_test trig_cd-1.1 {
   catchsql {
     CREATE TRIGGER trig UPDATE ON no_such_table BEGIN
       SELECT * from sqlite_master;
     END;
   } 
} {1 {no such table: no_such_table}}

execsql {
    CREATE TABLE t1(a);
}
execsql {
	CREATE TRIGGER tr1 INSERT ON t1 BEGIN
	  INSERT INTO t1 values(1);
 	END;
}
do_test trig_cd-1.2 {
    catchsql {
	CREATE TRIGGER tr1 DELETE ON t1 BEGIN
	    SELECT * FROM sqlite_master;
 	END
     }
} {1 {trigger tr1 already exists}}

do_test trig_cd-1.3 {
    catchsql {
	BEGIN;
	CREATE TRIGGER tr2 INSERT ON t1 BEGIN
	    SELECT * from sqlite_master; END;
        ROLLBACK;
	CREATE TRIGGER tr2 INSERT ON t1 BEGIN
	    SELECT * from sqlite_master; END;
    }
} {0 {}}

do_test trig_cd-1.4 {
    catchsql {
	DROP TRIGGER tr1;
	CREATE TRIGGER tr1 DELETE ON t1 BEGIN
	    SELECT * FROM sqlite_master;
	END
    }
} {0 {}}

do_test trig_cd-1.5 {
    execsql {
	BEGIN;
	DROP TRIGGER tr2;
	ROLLBACK;
	DROP TRIGGER tr2;
    }
} {}

do_test trig_cd-1.6 {
    catchsql {
	DROP TRIGGER biggles;
    }
} {1 {no such trigger: biggles}}

do_test trig_cd-1.7 {
    catchsql {
	DROP TABLE t1;
	DROP TRIGGER tr1;
    }
} {1 {no such trigger: tr1}}

execsql {
  CREATE TEMP TABLE temp_table(a);
}
do_test trig_cd-1.8 {
  execsql {
	CREATE TRIGGER temp_trig UPDATE ON temp_table BEGIN
	    SELECT * from sqlite_master;
	END;
	SELECT count(*) FROM sqlite_master WHERE name = 'temp_trig';
  } 
} {0}

do_test trig_cd-1.9 {
  catchsql {
    CREATE TRIGGER tr1 AFTER UPDATE ON sqlite_master BEGIN
       SELECT * FROM sqlite_master;
    END;
  }
} {1 {cannot create trigger on system table: sqlite_master}}

catchsql {
  DROP TABLE temp_table;
}
catchsql {
  DROP TABLE t1;
}

finish_test