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# Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 of the
# License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301 USA
import re
from wb import DefineModule
import grt
from db_generic_migration_grt import GenericMigration
ModuleInfo = DefineModule(name= "DbSql92Migration", author= "Oracle Corp.", version="1.0")
truncated_identifier_serial = 0
class Sql92Migration(GenericMigration):
def migrateTableToMySQL(self, state, sourceTable, targetSchema):
targetTable = super(Sql92Migration, self).migrateTableToMySQL(state, sourceTable, targetSchema)
targetTable.defaultCharacterSetName, targetTable.defaultCollationName = self.migrateCharsetCollation(state, sourceTable.owner.defaultCharacterSetName, sourceTable.owner.defaultCollationName, sourceTable, targetTable)
return targetTable
def migrateColumnDefaultValue(self, state, default_value, source_column, target_column):
target_default_value = default_value
def raise_on_no_match(re_str, target):
if re.match(re_str, target) is None:
raise ValueError('"%s" does not match the regular expression "%s"' % (target, re_str))
return True
value_validators = [
(['SMALLINT', 'INT', 'BIGINT'], int),
(['NUMERIC', 'DECIMAL', 'FLOAT', 'REAL', 'DOUBLE PRECISION'], float),
(['CHAR', 'VARCHAR', 'NCHAR', 'NVARCHAR', 'BLOB', 'CLOB', 'XML'], lambda _:True),
(['BIT', 'BIT VARYING'], lambda val: raise_on_no_match(r"[Bb]?'?[10]+'?", val) ), # E.g. B'101001'
(['DATE'], lambda val: raise_on_no_match(r"(\d{4}|\d{2})-\d{1,2}-\d{1,2}", val) ),
(['TIME'], lambda val: raise_on_no_match(r"(\d{1,2} )?\d{1,2}:\d{0,2}:\d{0,2}", val) ),
(['TIMESTAMP'], lambda val: raise_on_no_match(
r"((\d{4}|\d{2})-\d{1,2}-\d{1,2}( (\d{1,2} )?\d{1,2}:\d{0,2}:\d{0,2})?|CURRENT_TIMESTAMP|now\(\))", val) ),
(['BOOLEAN'], lambda val: raise_on_no_match(r'(TRUE|FALSE)', val) ),
]
if source_column.simpleType:
source_datatype = source_column.simpleType.name
if default_value:
for value_validator in value_validators:
if source_datatype in value_validator[0]:
try:
value_validator[1](default_value)
except Exception:
target_default_value = ''
state.addMigrationLogEntry(1, source_column, target_column,
'Default value %s is not supported. Removed!' % default_value)
else:
if source_datatype == 'TIMESTAMP' and default_value.upper() == 'NOW()':
target_default_value = 'CURRENT_TIMESTAMP'
return target_default_value
def migrateDatatypeForColumn(self, state, source_column, target_column):
targetCatalog = state.targetCatalog
mysql_simpleTypes = dict( (datatype.name.upper(), datatype) for datatype in targetCatalog.simpleDatatypes )
source_type = source_column.simpleType
if not source_type and source_column.userType:
# evaluate user type
source_type = source_column.userType.actualType
target_column.flags.extend(source_column.userType.flags)
if source_type:
# Decide which mysql datatype corresponds to the column datatype:
source_datatype = source_type.name.upper()
# string data types:
target_datatype = ''
if source_datatype in ['VARCHAR', 'NVARCHAR']:
if 0 <= source_column.length < 256:
target_datatype = 'VARCHAR'
elif 0 <= source_column.length < 65536: # MySQL versions > 5.0 can hold up to 65535 chars in a VARCHAR column
if targetCatalog.version.majorNumber < 5:
target_datatype = 'MEDIUMTEXT'
else:
target_datatype = 'VARCHAR'
else:
target_datatype = 'LONGTEXT'
elif source_datatype in ['CHAR', 'NCHAR']:
if source_column.length < 256:
target_datatype = 'CHAR'
else:
target_datatype = 'LONGTEXT'
# integer data types:
elif source_datatype in ['BIGINT', 'INT', 'SMALLINT']:
target_datatype = source_datatype
target_column.precision = -1
# floating point datatypes:
elif source_datatype in ['DECIMAL', 'NUMERIC']:
target_datatype = 'DECIMAL'
elif source_datatype in ['REAL', 'FLOAT']:
target_datatype = 'FLOAT'
elif source_datatype == 'DOUBLE PRECISION':
target_datatype = 'DOUBLE'
# binary datatypes:
elif source_datatype == 'BLOB':
if 0 <= source_column.length < 2**8:
target_datatype = 'TINYBLOB'
if 0 <= source_column.length < 2**16:
target_datatype = 'BLOB'
elif 0 <= source_column.length < 2**24:
target_datatype = 'MEDIUMBLOB'
else:
target_datatype = 'LONGBLOB'
elif source_datatype == 'CLOB':
if 0 <= source_column.length < 2**8:
target_datatype = 'TINYTEXT'
if 0 <= source_column.length < 2**16:
target_datatype = 'TEXT'
elif 0 <= source_column.length < 2**24:
target_datatype = 'MEDIUMTEXT'
else:
target_datatype = 'LONGTEXT'
# datetime datatypes:
elif source_datatype == 'TIMESTAMP':
target_datatype = 'TIMESTAMP'
elif source_datatype == 'DATE':
target_datatype = 'DATE'
elif source_datatype == 'TIME':
target_datatype = 'TIME'
elif source_datatype in ['BIT', 'BIT VARYING']:
target_datatype = 'BIT'
elif source_datatype == 'BOOLEAN':
target_datatype = 'TINYINT'
target_column.length = 1
state.addMigrationLogEntry(0, source_column, target_column,
"Source column type BOOLEAN was migrated to TINYINT(1)")
elif source_datatype == 'XML':
target_datatype = 'TEXT'
state.addMigrationLogEntry(0, source_column, target_column,
"Source column type XML was migrated to TEXT")
else:
# just fall back to same type name and hope for the best
target_datatype = source_datatype
if mysql_simpleTypes.has_key(target_datatype):
target_column.simpleType = mysql_simpleTypes[target_datatype]
else:
grt.log_warning("SQL-92 migrateTableColumnsToMySQL", "Can't find datatype %s for type %s\n" % (target_datatype, source_datatype))
state.addMigrationLogEntry(2, source_column, target_column,
'Could not migrate column "%s" in "%s": Unknown datatype "%s"' % (target_column.name, source_column.owner.name, source_datatype) )
return False
return True
else:
state.addMigrationLogEntry(2, source_column, target_column,
'Could not migrate type of column "%s" in "%s" (%s)' % (target_column.name, source_column.owner.name, source_column.formattedRawType) )
return False
return True
def migrateUpdateForChanges(self, state, target_catalog):
"""
Create datatype cast expression for target column based on source datatype.
"""
for targetSchema in target_catalog.schemata:
for targetTable in targetSchema.tables:
for target_column in targetTable.columns:
# SQL expression to use for converting the column data to the target type
# eg.: CAST(? as NVARCHAR(max))
type_cast_expression = None
source_datatype = None
source_column = state.lookupSourceObject(target_column)
if source_column:
source_datatype = GenericMigration.getColumnDataType(self, source_column)
if source_column and source_datatype:
if source_datatype == 'XML':
type_cast_expression = "CAST(? as NVARCHAR(max))"
if type_cast_expression:
target_column.owner.customData["columnTypeCastExpression:%s" % target_column.name] = "%s as ?" % type_cast_expression
return target_catalog
def migrateCharsetCollation(self, state, charset, collation, source_object, target_object):
if collation:
state.addMigrationLogEntry(0, source_object, target_object,
'Collation %s migrated to utf8_general_ci' % (collation))
return '', 'utf8_general_ci'
return charset, collation
instance = Sql92Migration()
@ModuleInfo.export(grt.STRING)
def getTargetDBMSName():
return 'Sql92'
@ModuleInfo.export(grt.STRING, grt.STRING, grt.classes.GrtLogObject)
def migrateIdentifier(name, log):
return instance.migrateIdentifier(name, log)
@ModuleInfo.export(grt.classes.db_Catalog, grt.classes.db_migration_Migration, grt.classes.db_Catalog)
def migrateCatalog(state, source_catalog):
return instance.migrateCatalog(state, source_catalog)
@ModuleInfo.export(grt.classes.db_Schema, grt.classes.db_migration_Migration, grt.classes.db_Schema, grt.classes.db_Catalog)
def migrateSchema(state, sourceSchema, targetCatalog):
return instance.migrateSchema(state, sourceSchema, targetCatalog)
@ModuleInfo.export(grt.classes.db_Table, grt.classes.db_migration_Migration, grt.classes.db_Table, grt.classes.db_Schema)
def migrateTableToMySQL(state, sourceTable, target_schema):
return instance.migrateTableToMySQL(state, sourceTable, target_schema)
@ModuleInfo.export(grt.INT, grt.classes.db_migration_Migration, grt.classes.db_Table, grt.classes.db_Table)
def migrateTableToMySQL2ndPass(state, sourceTable, targetTable):
return instance.migrateTableToMySQL2ndPass(state, sourceTable, targetTable)
@ModuleInfo.export(grt.classes.db_mysql_ForeignKey, grt.classes.db_migration_Migration, grt.classes.db_ForeignKey, grt.classes.db_Table)
def migrateTableForeignKeyToMySQL(state, source_fk, targetTable):
return instance.migrateTableForeignKeyToMySQL(state, source_fk, targetTable)
@ModuleInfo.export(grt.classes.db_mysql_Trigger, grt.classes.db_migration_Migration, grt.classes.db_Trigger, grt.classes.db_Table)
def migrateTriggerToMySQL(state, source_trigger, target_table):
return instance.migrateTriggerToMySQL(state, source_trigger, target_table)
@ModuleInfo.export(grt.classes.db_mysql_View, grt.classes.db_migration_Migration, grt.classes.db_View, grt.classes.db_Schema)
def migrateViewToMySQL(state, source_view, target_schema):
return instance.migrateViewToMySQL(state, source_view, target_schema)
@ModuleInfo.export(grt.classes.db_mysql_Routine, grt.classes.db_migration_Migration, grt.classes.db_Routine, grt.classes.db_Schema)
def migrateRoutineToMySQL(state, source_routine, target_schema):
return instance.migrateRoutineToMySQL(state, source_routine, target_schema)
@ModuleInfo.export(grt.classes.db_Catalog, grt.classes.db_migration_Migration, grt.classes.db_Catalog)
def migrateUpdateForChanges(state, target_catalog):
return instance.migrateUpdateForChanges(state, target_catalog)
@ModuleInfo.export((grt.LIST, grt.classes.db_migration_MigrationParameter), grt.classes.db_migration_Migration)
def getMigrationOptions(state):
list = grt.List(grt.OBJECT, grt.classes.db_migration_MigrationParameter.__grtclassname__)
#param = grt.classes.db_migration_MigrationParameter()
#param.name = "generic:mergeSchemaNameToTableName"
#param.caption = "Treat source catalogs as schemas in MySQL and merge schema and table names\nex.: MyCatalog.MySchema.MyTable -> MyCatalog.MySchema_MyTable"
#list.append(param)
return list
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