protected override string ParseColumn(TableColumnSchema column)
{
return(string.Format(@"{0} {1} {2} {3} {4}",
MakeDdlElementName(column.Name),
FBSchemaLoader.TypeDbsmToFb(column),
string.Empty, // column.computedBy == null ? string.Empty : ("COMPUTED BY " + column.computedBy),
column.DefaultValue.IsNullOrEmpty()
? string.Empty
: @"DEFAULT {0}".FormatStr(column.DefaultValue),
column.Nullable ? string.Empty : @" NOT NULL"));
}
/// <summary>
/// Создать схему метаданных из исходной базы
/// </summary>
/// <param name="connStr"></param>
public override DBSchema LoadExistingSchema(string connStr)
{
return(FBSchemaLoader.LoadSchema(connStr));
}
protected override string ParseColumnAlter(TableColumnSchema mColumn, TableColumnSchema eColumn)
{
return(string.Format(@"{0} TYPE {1}",
MakeDdlElementName(eColumn.Name),
FBSchemaLoader.TypeDbsmToFb(mColumn)));
}
protected override void AfterSchemaComparision(DBSchema existingSchema, DBSchema targetSchema)
{
// Drop Generators
var i = 1;
foreach (var eGen in existingSchema.Generators)
{
if (!targetSchema.IsGeneratorExist(eGen.Name))
{
AddDdlCommand(i,
eGen.Name,
"Generator",
MakeDdlGeneratorDrop(eGen));
}
i++;
}
// Create Generators
i = 1;
foreach (var mGenerator in targetSchema.Generators)
{
if (!existingSchema.IsGeneratorExist(mGenerator.Name))
{
AddDdlCommand(i,
mGenerator.Name,
"Generator",
MakeDdlGeneratorCreate(mGenerator));
AddDdlCommand(i,
mGenerator.Name,
"Generator",
MakeDdlGeneratorSet(mGenerator));
}
i++;
}
foreach (var mTable in targetSchema.Tables)
{
var eTable = existingSchema.GetTable(mTable.Name);
if (eTable != null)
{
foreach (var mColumn in mTable.Columns)
{
var eColumn = eTable.GetColumn(mColumn.Name);
if (eColumn == null)
{
continue;
}
if (mTable.IsExactColumn(eColumn) || eColumn.Type == ColumnType.BlobSubtype1 ||
eColumn.Type == ColumnType.BinaryLargeObject)
{
continue;
}
if (mColumn.Type != eColumn.Type)
{
AddDdlCommand(i,
eTable.Name + @"." + eColumn.Name,
"Column",
MakeDdlColumnAlter(mColumn, eColumn, eTable));
}
if (mColumn.Nullable && !eColumn.Nullable)
{
AddDdlCommand(i,
eTable.Name + @"." + eColumn.Name,
"Column",
string.Format(@"
UPDATE RDB$RELATION_FIELDS
SET
RDB$NULL_FLAG = NULL
WHERE
(RDB$FIELD_NAME = '{0}') AND (RDB$RELATION_NAME = '{1}')" ,
eColumn.Name,
eTable.Name));
}
if (mColumn.DefaultValue == eColumn.DefaultValue)
{
continue;
}
if (mColumn.DefaultValue != null)
{
AddDdlCommand(i,
eTable.Name + @"." + eColumn.Name,
"Column",
string.Format(@"
ALTER TABLE {0}
ADD IBE$$TEMP_COLUMN {1} DEFAULT {2}" ,
MakeDdlElementName(eTable.Name),
FBSchemaLoader.TypeDbsmToFb(eColumn),
mColumn.DefaultValue));
AddDdlCommand(i++,
eTable.Name + @"." + eColumn.Name,
"Column",
string.Format(@"
UPDATE RDB$RELATION_FIELDS F1
SET
F1.RDB$DEFAULT_VALUE =
(SELECT
F2.RDB$DEFAULT_VALUE
FROM
RDB$RELATION_FIELDS F2
WHERE
(F2.RDB$RELATION_NAME = '{0}') AND (F2.RDB$FIELD_NAME = 'IBE$$TEMP_COLUMN')),
F1.RDB$DEFAULT_SOURCE =
(SELECT
F3.RDB$DEFAULT_SOURCE
FROM
RDB$RELATION_FIELDS F3
WHERE
(F3.RDB$RELATION_NAME = '{0}') AND (F3.RDB$FIELD_NAME = 'IBE$$TEMP_COLUMN'))
WHERE
(F1.RDB$RELATION_NAME = '{0}') AND (F1.RDB$FIELD_NAME = '{0}')" ,
eTable.Name));
AddDdlCommand(i++,
eTable.Name + @"." + eColumn.Name,
"Column",
string.Format(@"ALTER TABLE {0} DROP IBE$$TEMP_COLUMN",
MakeDdlElementName(eTable.Name)));
}
else
{
AddDdlCommand(i,
eTable.Name + @"." + eColumn.Name,
"Column",
string.Format(@"
UPDATE RDB$RELATION_FIELDS F1
SET
F1.RDB$DEFAULT_VALUE = NULL,
F1.RDB$DEFAULT_SOURCE = NULL
WHERE
(F1.RDB$RELATION_NAME = '{0}') AND (F1.RDB$FIELD_NAME = '{1}')" ,
eTable.Name,
eColumn.Name));
}
}
}
i++;
}
}
