public override DatabaseSchema GetDatabaseSchema()
{
//TODO: query object type
// string sql = @"SELECT tbs.name ,ds.value as comments
//FROM sysobjects tbs
//LEFT JOIN sys.extended_properties ds ON ds.major_id=tbs.id and ds.minor_id=0
//where tbs.xtype in ('U','V') order by tbs.name";
string sql = @"SELECT tbs.name ,case when tbs.xtype='V' then null else ds.value end as comments ,tbs.xtype
FROM sysobjects tbs
LEFT JOIN (select major_id,minor_id,max(value) as value from sys.extended_properties group by major_id,minor_id) ds ON ds.major_id=tbs.id and ds.minor_id=0
where tbs.xtype in ('U','V') order by tbs.name";
DatabaseSchema schema = new DatabaseSchema();
schema.Tables = new List <ITableSchema>();
DbHelper helper = new DbHelper(this._connectionString);
var dt = helper.ListBySql(sql);
foreach (DataRow row in dt.Rows)
{
var table = new SqlServerTableSchema
{
Name = row["name"] + string.Empty,
Comment = row["comments"] + string.Empty,
ObjectType = row["xtype"].ToString() == "U" ? "Table" : "View"
};
schema.Tables.Add(table);
}
;
return(schema);
}
private void SetPrimaryKey(SqlServerTableSchema oracleTable)
{
if (oracleTable == null)
{
return;
}
if (oracleTable.Columns == null || oracleTable.Columns.Count <= 0)
{
SetColumns(oracleTable);
}
string sql = @"SELECT IDX.NAME AS CONSTRAINT_NAME,
COL.NAME AS COLUMN_NAME
FROM SYS.INDEXES IDX JOIN
SYS.INDEX_COLUMNS IDXCOL ON (IDX.OBJECT_ID = IDXCOL.OBJECT_ID AND IDX.INDEX_ID = IDXCOL.INDEX_ID AND
IDX.IS_PRIMARY_KEY = 1) JOIN
SYS.TABLES TAB ON (IDX.OBJECT_ID = TAB.OBJECT_ID) JOIN
SYS.COLUMNS COL ON (IDX.OBJECT_ID = COL.OBJECT_ID AND IDXCOL.COLUMN_ID = COL.COLUMN_ID) where tab.name=@TABLE_NAME";
var para = new SqlParameter("@TABLE_NAME", oracleTable.Name.ToUpper());
DbHelper helper = new DbHelper(this._connectionString);
var table = helper.ListBySql(sql, para);
Common.PrimaryKey key = new Common.PrimaryKey();
key.Columns = new ColumnCollection();
foreach (DataRow row in table.Rows)
{
string column_name = row["COLUMN_NAME"] + string.Empty;
string constraint_name = row["CONSTRAINT_NAME"] + string.Empty;
key.ConstraintName = constraint_name;
key.Columns.Add(oracleTable.Columns.Find(it => it.Name == column_name));
}
oracleTable.PrimaryKey = key;
}
private void SetForeignKey(SqlServerTableSchema oracleTable)
{
if (oracleTable == null)
{
return;
}
if (oracleTable.Columns == null || oracleTable.Columns.Count <= 0)
{
SetColumns(oracleTable);
}
string sql = @"select obj.name CONSTRAINT_NAME,
main_col.name COLUMN_NAME,
sub.name FOREIGN_TABLE_NAME
from sysforeignkeys fk left join sys.tables main on fk.fkeyid=main.object_id
left join sys.tables sub on sub.object_id=fk.rkeyid
left join syscolumns main_col on fk.fkey=main_col.colid and fk.fkeyid=main_col.id
left join sysobjects obj on obj.id=fk.constid
where main.name=@TABLE_NAME";
var para = new SqlParameter("@TABLE_NAME", oracleTable.Name.ToUpper());
DbHelper helper = new DbHelper(this._connectionString);
var table = helper.ListBySql(sql, para);
oracleTable.ForiegnKeys = new List <Common.ForeignKey>();
foreach (DataRow row in table.Rows)
{
string column_name = row["COLUMN_NAME"] + string.Empty;
string constraint_name = row["CONSTRAINT_NAME"] + string.Empty;
Common.ForeignKey key = new Common.ForeignKey();
key.Columns = new ColumnCollection();
key.ConstraintName = constraint_name;
if (key.ForeignTable == null && ContainForeignTable)
{
string forignTable = row["FOREIGN_TABLE_NAME"] + string.Empty;
var fac = new SqlServerDataFactory(this._connectionString);
fac.ContainForeignTable = false;
key.ForeignTable = fac.GetTableSchema(forignTable);
}
key.Columns.Add(oracleTable.Columns.Find(it => it.Name == column_name));
oracleTable.ForiegnKeys.Add(key);
}
}
public override ITableSchema GetTableSchema(string table_name)
{
string sql = @"SELECT tbs.name ,ds.value as comments ,tbs.xtype as OBJECT_TYPE ,null as TEXT
FROM sysobjects tbs
LEFT JOIN sys.extended_properties ds ON ds.major_id=tbs.id and ds.minor_id=0 and ds.[name]='MS_Description'
where tbs.xtype in ('U','V') and tbs.name=@TABLE_NAME";
DbHelper helper = new DbHelper(this._connectionString);
var data = helper.ListBySql(sql, new SqlParameter("@TABLE_NAME", table_name));
string objectType = (data.Rows[0]["OBJECT_TYPE"] + string.Empty).Trim();
SqlServerTableSchema oracleTable = new SqlServerTableSchema();
oracleTable.Name = table_name;
oracleTable.Comment = data.Rows[0]["COMMENTS"] + string.Empty;
oracleTable.ObjectType = objectType == "V" ? "VIEW" : "TABLE";
if (objectType == "V")
{
oracleTable.ViewScript = data.Rows[0]["TEXT"].ToString();
}
SetColumns(oracleTable);
SetForeignKey(oracleTable);
SetUniqueKey(oracleTable);
SetPrimaryKey(oracleTable);
return(oracleTable);
}
private void SetColumns(SqlServerTableSchema oracleTable)
{
if (oracleTable == null)
{
return;
}
oracleTable.Columns = new ColumnCollection();
string sql = @"SELECT
a.colorder COLUMN_ID,
a.name COLUMN_NAME,
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then 1 else 0 end) AUTOINCREMENT,
(case when (SELECT count(*) FROM sysobjects
WHERE (name in (SELECT name FROM sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid FROM sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name)))))))
AND (xtype = 'PK'))>0 then 1 else 0 end) PK,
b.name DATA_TYPE,
a.length BYTE_LEN,
COLUMNPROPERTY(a.id,a.name,'PRECISION') as DATA_LENGTH,
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as DATA_SCALE,
(case when a.isnullable=1 then 1 else 0 end) NULLABLE,
isnull(e.text,'') DATA_DEFAULT,
isnull(g.[value], ' ') AS COMMENTS
FROM syscolumns a
left join systypes b on a.xtype=b.xusertype
inner join sysobjects d on a.id=d.id and (d.xtype='U' or d.xtype='V') and d.name<>'dtproperties'
left join syscomments e on a.cdefault=e.id
left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id
left join sys.extended_properties f on d.id=f.class and f.minor_id=0
where b.name is not null
and d.name=@table_name
order by a.id,a.colorder";
List <IColumn> columns = new List <IColumn>();
var para = new SqlParameter("@table_name", oracleTable.Name);
DbHelper helper = new DbHelper(this._connectionString);
var table = helper.ListBySql(sql, para);
foreach (DataRow row in table.Rows)
{
int scale = Convert.ToInt32(row["DATA_SCALE"]);
string data_type = row["DATA_TYPE"] + string.Empty;
int len = Convert.ToInt32(row["DATA_LENGTH"]);
var column = new SqlServerColumn
{
Name = row["COLUMN_NAME"] + string.Empty,
Comment = row["COMMENTS"] + string.Empty,
CsharpType = SqlServerUtils.TransformDatabaseType(data_type, len, scale),
DbType = data_type,
DefaultValue = (row["DATA_DEFAULT"] + string.Empty).Trim('\r', '\n'),
IsNullable = (row["NULLABLE"] + string.Empty) == "1",
Length = len,
Scale = scale,
Table = oracleTable,
IsAutoIncrement = Convert.ToInt32(row["AUTOINCREMENT"]) == 1,
IsNumeric = SqlServerUtils.IsNumeric(data_type),
};
oracleTable.Columns.Add(column);
}
}
