def agregarNuevoTipo(self, tablaAMod, colAMod, nuevoTipo):
typeChecker = TypeChecker()
bandera = False
tableToAlter = typeChecker.searchTable(SymbolTable().useDatabase,
tablaAMod)
tipoFinal = {
'_tipoColumna': str(nuevoTipo._tipoColumna),
'_paramOne': nuevoTipo._paramOne,
'_paramTwo': nuevoTipo._paramTwo
}
for columna in tableToAlter.columns:
if (columna._name == colAMod):
bandera = True
columna._dataType = tipoFinal
break
if not bandera:
desc = f": Undefined column in alter type ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
typeChecker.writeFile()
pass
def agregarCheck(self, conditionColumn, tablaId):
typeChecker = TypeChecker()
bandera = False
tableToAlter = typeChecker.searchTable(SymbolTable().useDatabase,
tablaId)
# L (L|D)*
whatColumnIs = re.search('[a-zA-z]([a-zA-z]|[0-9])*',
conditionColumn.alias)
if whatColumnIs != None:
whatColumnIs = whatColumnIs.group(0)
for columna in tableToAlter.columns:
if (columna._name == whatColumnIs):
bandera = True
columna._check = conditionColumn.alias
break
if not bandera:
desc = f": Undefined column in alter check ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
else:
desc = f": column not given in check()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
typeChecker.writeFile()
def agregarFk(self, listaCols, nombreTabla, listaTablasCols, tablaAAlter):
typeChecker = TypeChecker()
# the len of the cols must be de same
if len(listaCols) != len(listaTablasCols):
desc = f": cantidad of params in foreign() != "
ErrorController().add(36, 'Execution', desc, 0, 0)
return
existForeingTable = typeChecker.searchTable(SymbolTable().useDatabase,
nombreTabla)
tableToAlter = typeChecker.searchTable(SymbolTable().useDatabase,
tablaAAlter)
# validate if the foreign table exists
if existForeingTable == None:
desc = f": Undefined table in foreign key ()"
ErrorController().add(27, 'Execution', desc, 0, 0)
return
# validate if the columns exists in the foreign table
for coli in listaTablasCols:
if typeChecker.searchColumn(existForeingTable, coli) == None:
desc = f": Undefined col in table in foreign key ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
for x in range(0, len(listaCols)):
for columna in tableToAlter.columns:
if (columna._name == listaCols[x]):
bandera = True
columna._foreignKey = {
'_refTable': nombreTabla,
'_refColumn': listaTablasCols[x]
}
break
if not bandera:
desc = f": Undefined column in alter foreign key ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
typeChecker.writeFile()
def agregarNotNull(self, tablaAMod, colAMod):
typeChecker = TypeChecker()
bandera = False
tableToAlter = typeChecker.searchTable(SymbolTable().useDatabase,
tablaAMod)
for columna in tableToAlter.columns:
if (columna._name == colAMod):
bandera = True
columna._notNull = True
break
if not bandera:
desc = f": Undefined column in alter not null ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
typeChecker.writeFile()
def process(self, instrucction):
typeChecker = TypeChecker()
bandera = False
tableToAlter = typeChecker.searchTable(SymbolTable().useDatabase,
instrucction)
for columna in tableToAlter.columns:
if (columna._name == self._oldName):
bandera = True
columna._name = self._newName
break
if not bandera:
desc = f": Undefined column in rename column ()"
ErrorController().add(26, 'Execution', desc, 0, 0)
return
bandera = False
typeChecker.writeFile()