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local sqlite3 = require("lsqlite3")
local db
optbl = { [sqlite3.UPDATE] = "UPDATE";
[sqlite3.INSERT] = "INSERT";
[sqlite3.DELETE] = "DELETE"
}
setmetatable(optbl,
{__index=function(t,n) return string.format("Unknown op %d",n) end})
function update_hook(ud, op, dname, tname, rowid)
print("Sqlite Update Hook:", optbl[op], dname, tname, rowid)
end
function commit_hook(ud)
print("<Sqlite Commit Hook>")
end
function rollback_hook(ud)
print("<Sqlite Rollback Hook>")
end
-- db:exec wrapper with result assertion
function db_exec(stmt)
if db:exec(stmt) ~= sqlite3.OK then
print("Sqlite ERROR: ", db:errmsg())
end
end
-- debug output for database table
function db_print_tables(...)
for i = 1,select('#',...) do
name = select(i,...)
print(string.format("\n%s contents:", name))
for row in db:nrows("SELECT * FROM " .. name) do
print(row.id, row.content)
end
end
end
local tests = {}
-- runs specified test with all necessary setup
-- @param string name
function run_test(name)
-- banner
print(string.format([[
==========================
%s
==========================
]], name))
-- setup
db = sqlite3.open_memory()
local udtbl = {0, 0, 0}
db:update_hook(update_hook, udtbl)
db:commit_hook(commit_hook, udtbl)
db:rollback_hook(rollback_hook, udtbl)
-- run test
tests[name]()
-- destroy
db:close()
end
function tests.insert_select()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY, content VARCHAR );
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
INSERT INTO T1 VALUES (NULL, 'Hello Sqlite3');
INSERT INTO T2 SELECT * FROM T1;
]]
db_print_tables('T1', 'T2')
end
function tests.trigger_insert()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TRIGGER after_insert_T1
AFTER INSERT ON T1
FOR EACH ROW
BEGIN
INSERT INTO T2 VALUES(NEW.id, NEW.content);
END;
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
INSERT INTO T1 VALUES (NULL, 'Hello Sqlite3');
]]
db_print_tables('T1', 'T2')
end
function tests.cascade_delete()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1 ON DELETE CASCADE, content VARCHAR );
CREATE TABLE T3 ( id INTEGER PRIMARY KEY REFERENCES T2 ON DELETE CASCADE, content VARCHAR );
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T1 VALUES (NULL, 'c');
INSERT INTO T1 VALUES (NULL, 'd');
INSERT INTO T2 SELECT * FROM T1;
INSERT INTO T3 SELECT * FROM T2;
DELETE FROM T1 WHERE id < 3;
]]
db_print_tables('T1', 'T2', 'T3')
end
function tests.cascade_update()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1 ON UPDATE CASCADE, content VARCHAR );
CREATE TABLE T3 ( id INTEGER PRIMARY KEY REFERENCES T2 ON UPDATE CASCADE, content VARCHAR );
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T1 VALUES (NULL, 'c');
INSERT INTO T1 VALUES (NULL, 'd');
INSERT INTO T2 SELECT * FROM T1;
INSERT INTO T3 SELECT * FROM T2;
UPDATE T1 SET id = id + 10 WHERE id < 3;
]]
db_print_tables('T1', 'T2', 'T3')
end
-- hook "anomaly"
-- implicit one-statement transaction rollback demonstration
function tests.cascade_update_restrict()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1 ON UPDATE RESTRICT, content VARCHAR );
CREATE TABLE T3 ( id INTEGER PRIMARY KEY REFERENCES T2 ON UPDATE RESTRICT, content VARCHAR );
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T1 VALUES (NULL, 'c');
INSERT INTO T1 VALUES (NULL, 'd');
INSERT INTO T2 SELECT * FROM T1;
INSERT INTO T3 SELECT * FROM T2;
-- this update gets reverted but the update_hook with rowid=11 *DOES* get triggered
UPDATE T1 SET id = id + 10 WHERE id < 3;
]]
db_print_tables('T1', 'T2', 'T3')
end
-- hook "anomaly"
-- case is analogous to cascade_update_restrict
function tests.cascade_delete_restrict()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1 ON DELETE RESTRICT, content VARCHAR );
CREATE TABLE T3 ( id INTEGER PRIMARY KEY REFERENCES T2 ON DELETE RESTRICT, content VARCHAR );
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T1 VALUES (NULL, 'c');
INSERT INTO T1 VALUES (NULL, 'd');
INSERT INTO T2 SELECT * FROM T1;
INSERT INTO T3 SELECT * FROM T2;
DELETE FROM T1 WHERE id < 3;
]]
db_print_tables('T1', 'T2', 'T3')
end
-- no anomalies here
function tests.fk_violate_insert()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1, content VARCHAR);
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T2 VALUES(99, 'xxx');
]]
db_print_tables('T1', 'T2')
end
-- hook "anomaly"
function tests.fk_violate_update()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1, content VARCHAR);
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T2 VALUES(1, 'a');
-- update doesn't succeed but we get a hook for tuple with rowid=99 in T2
UPDATE T2 SET id = 99 WHERE id = 1;
]]
db_print_tables('T1', 'T2')
end
-- like fk_violate_update but wrapped inside an explicit transaction
function tests.transaction_fk_violate_update()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY REFERENCES T1, content VARCHAR);
BEGIN TRANSACTION;
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T2 VALUES(1, 'a');
-- Doesn't trigger rollback hook because the implicit update statement transaction
-- is nested inside our explicit transaction. However we *do* get an error.
UPDATE T2 SET id = 99 WHERE id = 1;
COMMIT;
]]
db_print_tables('T1', 'T2')
end
function tests.cascade_update_setnull()
db_exec[[
PRAGMA foreign_keys = ON;
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
CREATE TABLE T2 ( id INTEGER PRIMARY KEY, content INTEGER REFERENCES T1(id) ON UPDATE SET NULL);
INSERT INTO T1 VALUES (NULL, 'a');
INSERT INTO T1 VALUES (NULL, 'b');
INSERT INTO T1 VALUES (NULL, 'c');
INSERT INTO T1 VALUES (NULL, 'd');
INSERT INTO T2 SELECT NULL, id FROM T1;
UPDATE T1 SET id = id + 10 WHERE id < 3;
]]
db_print_tables('T1', 'T2')
end
function tests.transaction_commit()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
BEGIN TRANSACTION;
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
COMMIT;
]]
db_print_tables('T1')
end
function tests.transaction_rollback()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
BEGIN TRANSACTION;
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
ROLLBACK;
]]
db_print_tables('T1')
end
function tests.savepoint_nested_commit()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
SAVEPOINT S1;
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
SAVEPOINT S2;
INSERT INTO T1 VALUES (NULL, 'Hello Sqlite3');
-- nested commit doesn't trigger commit_hook
RELEASE S2;
INSERT INTO T1 VALUES (NULL, 'Hello transactions');
RELEASE S1;
]]
db_print_tables('T1')
end
function tests.savepoint_nested_rollback()
db_exec[[
CREATE TABLE T1 ( id INTEGER PRIMARY KEY, content VARCHAR );
SAVEPOINT S1;
INSERT INTO T1 VALUES (NULL, 'Hello World');
INSERT INTO T1 VALUES (NULL, 'Hello Lua');
SAVEPOINT S2;
INSERT INTO T1 VALUES (NULL, 'Hello Sqlite3');
-- nested rollback doesn't trigger rollback_hook
ROLLBACK TO S2;
INSERT INTO T1 VALUES (NULL, 'Hello transactions');
RELEASE S1;
]]
db_print_tables('T1')
end
-- run_test('fk_violate_insert')
for k,v in pairs(tests) do
run_test(k)
end
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