def dropTable(database: str, table: str) -> int:
try:
retorno = 1
db = __buscarLlaveBaseDato(database)
if db is not None:
modoDB = db[0]
tablas = db[2]
if tablas:
if tablas.get(table) is not None:
modoDB = tablas[table]
if modoDB == "avl":
retorno = avl.dropTable(database, table)
elif modoDB == "b":
retorno = b.dropTable(database, table)
elif modoDB == "bplus":
retorno = bPlus.dropTable(database, table)
elif modoDB == "dict":
retorno = dic.dropTable(database, table)
elif modoDB == "isam":
retorno = isam.dropTable(database, table)
elif modoDB == "json":
retorno = json.dropTable(database, table)
elif modoDB == "hash":
retorno = hash.dropTable(database, table)
return retorno
else:
return 2
except Exception:
return 1
def __drop_table_sp(database, table, mode):
dbs = databases.find_all(database)
if dbs == []:
return 2
if databases.find_table(database, table) == None:
return 3
for db in dbs:
if db.mode == mode == "avl":
result = avlMode.dropTable(database, table)
elif db.mode == mode == "b":
result = BMode.dropTable(database, table)
elif db.mode == mode == "bplus":
result = BPlusMode.dropTable(database, table)
elif db.mode == mode == "dict":
result = DictMode.dropTable(database, table)
elif db.mode == mode == "isam":
result = ISAMMode.dropTable(database, table)
elif db.mode == mode == "json":
result = jsonMode.dropTable(database, table)
elif db.mode == mode == "hash":
result = HashMode.dropTable(database, table)
else:
continue
if result != 3:
if result == 0:
db.tables.delete(table)
for x in range(5):
try:
Serializable.commit(databases, "lista_bases_de_datos")
return result
except:
break
return 1
break
return result
def dropTable(database: str, table: str) -> int:
"""Deletes a table in a database (including all of its content)
Parameters:\n
database (str): name of the database
table (str): name of the table
Returns:\n
0: successful operation
1: an error ocurred
2: non-existent database
3: non-existent table
"""
bd = _database(database)
if bd:
tb = _table(database, table)
if tb:
mode = tb["modo"]
val = -1
if mode == "avl":
val = avl.dropTable(database, table)
elif mode == "b":
val = b.dropTable(database, table)
elif mode == "bplus":
val = bplus.dropTable(database, table)
elif mode == "hash":
val = hash.dropTable(database, table)
elif mode == "isam":
val = isam.dropTable(database, table)
elif mode == "json":
val = json.dropTable(database, table)
elif mode == "dict":
val = dict.dropTable(database, table)
if val == 0:
_database(database)["tablas"].remove(_table(database, table))
_Guardar()
return val
else:
return 3
else:
return 2
def obtenerAtributosTabla(database, table):
mode = None
for i in range(7):
mode = obtenerBase(database, i)
if mode == []:
continue
else:
if mode == 0:
mode = "avl"
elif mode == 1:
mode = "b"
elif mode == 2:
mode = "bplus"
elif mode == 3:
mode = "dict"
elif mode == 4:
mode = "isam"
elif mode == 5:
mode = "json"
elif mode == 6:
mode = "hash"
break
if mode == None:
return 2
if mode == "avl":
# Grupo 16
val = avl_mode.dropTable(database, table)
elif mode == "b":
# Grupo 17
val = b_mode.dropTable(database, table)
elif mode == "bplus":
# Grupo 18
val = bplus_mode.dropTable(database, table)
elif mode == "dict":
# Auxiliar
val = dict_mode.dropTable(database, table)
elif mode == "isam":
# Grupo 14
val = isam_mode.dropTable(database, table)
elif mode == "json":
# Ingeniero
val = json_mode.dropTable(database, table)
elif mode == "hash":
# Grupo 15
val = hash_mode.dropTable(database, table)
else:
val = 3
return val
def dropTable(database: str, table: str) -> int:
"""Deletes a table in a database (including all of its content)
Parameters:\n
database (str): name of the database
table (str): name of the table
Returns:\n
0: successful operation
1: an error ocurred
2: non-existent database
3: non-existent table
"""
bd = _Buscar(database)
if bd:
mode = bd[1]
val = -1
if mode == "avl":
val = avl.dropTable(database, table)
elif mode == "b":
val = b.dropTable(database, table)
elif mode == "bplus":
val = bplus.dropTable(database, table)
elif mode == "hash":
val = hash.dropTable(database, table)
elif mode == "isam":
val = isam.dropTable(database, table)
elif mode == "json":
val = json.dropTable(database, table)
elif mode == "dict":
val = dict.dropTable(database, table)
return val
else:
return 2
def dropTable(database, name_table):
ModeDB, indexDB = exist_Alter(database)
if ModeDB:
mode = ModeDB.get_mode()
if mode.lower().strip() == "avl":
return avl.dropTable(database, name_table)
elif mode.lower().strip() == "b":
return b.dropTable(database, name_table)
elif mode.lower().strip() == "bPlus".lower():
return bPlus.dropTable(database, name_table)
elif mode.lower().strip() == "dict":
return diccionario.dropTable(database, name_table)
elif mode.lower().strip() == "hash":
return hash.dropTable(database, name_table)
elif mode.lower().strip() == "isam":
return isam.dropTable(database, name_table)
elif mode.lower().strip() == "json":
return json.dropTable(database, name_table)
def dropTable(database, table):
mode = None
for i in range(7):
mode = obtenerBase(database, i)
if mode == []:
continue
else:
if mode == 0:
mode = "avl"
elif mode == 1:
mode = "b"
elif mode == 2:
mode = "bplus"
elif mode == 3:
mode = "dict"
elif mode == 4:
mode = "isam"
elif mode == 5:
mode = "json"
elif mode == 6:
mode = "hash"
break
if mode == None:
return 2
if mode == "avl":
# Grupo 16
val = avl_mode.dropTable(database, table)
elif mode == "b":
# Grupo 17
val = b_mode.dropTable(database, table)
elif mode == "bplus":
# Grupo 18
val = bplus_mode.dropTable(database, table)
elif mode == "dict":
# Auxiliar
val = dict_mode.dropTable(database, table)
elif mode == "isam":
# Grupo 14
val = isam_mode.dropTable(database, table)
elif mode == "json":
# Ingeniero
val = json_mode.dropTable(database, table)
elif mode == "hash":
# Grupo 15
val = hash_mode.dropTable(database, table)
else:
val = 3
if val == 0:
global Tablas
try:
# Leemos el archivo binario de los registros de bases de datos
fichero_lectura = open("TB_register", "rb")
Tablas = pickle.load(fichero_lectura)
Tablas[database].pop(table)
if len(Tablas[database]) == 0:
Tablas.pop(database)
# Actualizamos el archivo binario de los registros de bases de datos
fichero_escritura = open("TB_register", "wb")
pickle.dump(Tablas, fichero_escritura)
fichero_escritura.close()
except:
Tablas[database].pop(table)
if len(Tablas[database]) == 0:
Tablas.pop(database)
# Actualizamos el archivo binario de los registros de bases de datos
fichero_escritura = open("TB_register", "wb")
pickle.dump(Tablas, fichero_escritura)
fichero_escritura.close()
return val
def alterTableMode(database: str, table: str, databaseRef: str, mode: str):
if exist_Alter(database) and exist_Alter(databaseRef) and exist_Alter(
databaseRef)[0].get_mode() == mode:
ModeDB, indice = exist_Alter(database)
if ModeDB:
oldMode = ModeDB.get_mode()
if oldMode.lower().strip() == "avl":
tables = avl.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(
database, tabla,
oldMode) # UNA LISTA VACIA NO EJECUTA EL FOR
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
avl.dropTable(database, table)
elif oldMode.lower().strip() == "b":
tables = b.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
b.dropTable(database, table)
elif oldMode.lower().strip() == "bPlus".lower():
tables = bPlus.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
bPlus.dropTable(database, table)
elif oldMode.lower().strip() == "dict":
tables = diccionario.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
diccionario.dropTable(database, table)
elif oldMode.lower().strip() == "isam":
tables = isam.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
isam.dropTable(database, table)
elif oldMode.lower().strip() == "hash":
tables = hash.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
hash.dropTable(database, table)
elif oldMode.lower().strip() == "json":
tables = json.showTables(database)
for tabla in tables:
if tabla == table:
listaDatos = get_Data(database, tabla, oldMode)
numberColumns = len(listaDatos[0])
insertAlter(databaseRef, tabla, numberColumns, mode,
listaDatos)
json.dropTable(database, table)
else:
return None
