public DataTable GetTables()
{
DataTable metaData = new DataTable();
//metaData.Columns.Add("TABLE_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_SCHEMA", Type.GetType("System.String"));
metaData.Columns.Add("TABLE_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_TYPE", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_GUID", Type.GetType("System.String"));
metaData.Columns.Add("DESCRIPTION", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_PROPID", Type.GetType("System.String"));
//metaData.Columns.Add("DATE_CREATED", Type.GetType("System.String"));
//metaData.Columns.Add("DATE_MODIFIED", Type.GetType("System.String"));
IVistaDBDatabase db = DDA.OpenDatabase(dbName, VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
foreach (string table in tables)
{
IVistaDBTableStructure tblStructure = db.TableStructure(table);
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["TABLE_NAME"] = tblStructure.Name;
row["DESCRIPTION"] = tblStructure.Description;
}
return(metaData);
}
public DataTable GetForeignKeys(string tableName)
{
DataTable metaData = new DataTable();
//metaData.Columns.Add("PK_TABLE_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("PK_TABLE_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("PK_TABLE_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("FK_TABLE_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("FK_TABLE_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("FK_TABLE_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("ORDINAL", Type.GetType("System.String"));
//metaData.Columns.Add("UPDATE_RULE", Type.GetType("System.String"));
//metaData.Columns.Add("DELETE_RULE", Type.GetType("System.String"));
//metaData.Columns.Add("PK_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("FK_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("DEFERRABILITY", Type.GetType("System.String"));
metaData.Columns.Add("PK_TABLE_CATALOG", Type.GetType("System.String"));
metaData.Columns.Add("PK_TABLE_SCHEMA", Type.GetType("System.String"));
metaData.Columns.Add("FK_TABLE_CATALOG", Type.GetType("System.String"));
metaData.Columns.Add("FK_TABLE_SCHEMA", Type.GetType("System.String"));
metaData.Columns.Add("FK_TABLE_NAME", Type.GetType("System.String"));
metaData.Columns.Add("PK_TABLE_NAME", Type.GetType("System.String"));
metaData.Columns.Add("ORDINAL", Type.GetType("System.Int32"));
metaData.Columns.Add("FK_NAME", Type.GetType("System.String"));
metaData.Columns.Add("PK_NAME", Type.GetType("System.String"));
metaData.Columns.Add("PK_COLUMN_NAME", Type.GetType("System.String"));
metaData.Columns.Add("FK_COLUMN_NAME", Type.GetType("System.String"));
IVistaDBDatabase db = DDA.OpenDatabase(dbName, VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
IVistaDBTableStructure tblStructure = db.TableStructure(tableName);
foreach (IVistaDBRelationshipInformation relInfo in tblStructure.ForeignKeys)
{
//string[] fColumns = relInfo.ForeignKey.Split(new char[] {';'});
//string[] pColumns = relInfo.p.ForeignKey.pprimaryKey.Split(new char[] {';'});
//for(int i = 0; i < fColumns.GetLength(0); i++)
{
metaData.Rows.Add(new object[]
{
GetDatabaseName(),
DBNull.Value,
DBNull.Value,
DBNull.Value,
tblStructure.Name,
relInfo.PrimaryTable,
0,
relInfo.Name,
"PKEY",
"", //pColumns[i],
""
}); //fColumns[i]});
}
}
return(metaData);
}
public DataTable GetIndexes(string tableName)
{
DataTable metaData = new DataTable();
//metaData.Columns.Add("TABLE_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("INDEX_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("INDEX_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("INDEX_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("UNIQUE", Type.GetType("System.String"));
//metaData.Columns.Add("CLUSTERED", Type.GetType("System.String"));
//metaData.Columns.Add("TYPE", Type.GetType("System.String"));
//metaData.Columns.Add("FILL_FACTOR", Type.GetType("System.String"));
//metaData.Columns.Add("INITIAL_SIZE", Type.GetType("System.String"));
//metaData.Columns.Add("NULLS", Type.GetType("System.String"));
//metaData.Columns.Add("SORT_BOOKMARKS", Type.GetType("System.String"));
//metaData.Columns.Add("AUTO_UPDATE", Type.GetType("System.String"));
//metaData.Columns.Add("NULL_COLLATION", Type.GetType("System.String"));
//metaData.Columns.Add("COLLATION", Type.GetType("System.String"));
//metaData.Columns.Add("CARDINALITY", Type.GetType("System.String"));
//metaData.Columns.Add("PAGES", Type.GetType("System.String"));
//metaData.Columns.Add("FILTER_CONDITION", Type.GetType("System.String"));
//metaData.Columns.Add("INTEGRATED", Type.GetType("System.String"));
metaData.Columns.Add("TABLE_CATALOG", Type.GetType("System.String"));
metaData.Columns.Add("TABLE_NAME", Type.GetType("System.String"));
metaData.Columns.Add("INDEX_CATALOG", Type.GetType("System.String"));
metaData.Columns.Add("INDEX_NAME", Type.GetType("System.String"));
metaData.Columns.Add("UNIQUE", Type.GetType("System.Boolean"));
metaData.Columns.Add("COLLATION", Type.GetType("System.Int16"));
metaData.Columns.Add("COLUMN_NAME", Type.GetType("System.String"));
IVistaDBDatabase db = DDA.OpenDatabase(dbName, VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
IVistaDBTableStructure tblStructure = db.TableStructure(tableName);
foreach (IVistaDBIndexInformation indexInfo in tblStructure.Indexes)
{
string[] pks = indexInfo.KeyExpression.Split(',');
int index = 0;
foreach (string colName in pks)
{
metaData.Rows.Add(new object[]
{
GetDatabaseName(),
tblStructure.Name,
GetDatabaseName(),
indexInfo.Name,
indexInfo.Unique,
indexInfo.KeyStructure[index++].Descending ? 2 : 1,
colName
});
}
}
return(metaData);
}
DataTable IMyMetaPlugin.GetTables(string database)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateTablesDataTable();
db = DDA.OpenDatabase(this.GetFullDatabaseName(),
VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
foreach (string table in tables)
{
IVistaDBTableSchema tblStructure = db.TableSchema(table);
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["TABLE_NAME"] = tblStructure.Name;
row["DESCRIPTION"] = tblStructure.Description;
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(metaData);
}
public TableSchema[] GetTables(string connectionString, DatabaseSchema database)
{
var tables = new List <TableSchema>();
var extendedProperties = new List <ExtendedProperty>();
using (IVistaDBDatabase vistaDb = GetDatabase(connectionString))
{
if (vistaDb == null)
{
return(tables.ToArray());
}
foreach (string tableName in vistaDb.EnumTables())
{
IVistaDBTableSchema table = vistaDb.TableSchema(tableName);
if (table == null)
{
continue;
}
extendedProperties.Clear();
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.Description, table.Description));
var tableSchema = new TableSchema(database, table.Name, String.Empty, DateTime.MinValue, extendedProperties.ToArray());
tables.Add(tableSchema);
}
}
return(tables.ToArray());
}
DataTable IPlugin.GetTableIndexes(string database, string table)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateIndexesDataTable();
using (VistaDBConnection cn = new VistaDBConnection(context.ConnectionString))
{
db = DDA.OpenDatabase(this.GetFullDatabaseName(), VistaDBDatabaseOpenMode.NonexclusiveReadOnly, GetPassword(cn));
}
ArrayList tables = db.EnumTables();
IVistaDBTableSchema tblStructure = db.TableSchema(table);
foreach (IVistaDBIndexInformation indexInfo in tblStructure.Indexes)
{
string[] pks = indexInfo.KeyExpression.Split(';');
int index = 0;
foreach (string colName in pks)
{
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["TABLE_CATALOG"] = GetDatabaseName();
row["TABLE_NAME"] = tblStructure.Name;
row["INDEX_CATALOG"] = GetDatabaseName();
row["INDEX_NAME"] = indexInfo.Name;
row["UNIQUE"] = indexInfo.Unique;
row["COLLATION"] = indexInfo.KeyStructure[index++].Descending ? 2 : 1;
row["COLUMN_NAME"] = colName;
}
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(metaData);
}
DataTable IPlugin.GetForeignKeys(string database, string tableName)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateForeignKeysDataTable();
using (VistaDBConnection cn = new VistaDBConnection(context.ConnectionString))
{
db = DDA.OpenDatabase(this.GetFullDatabaseName(), VistaDBDatabaseOpenMode.NonexclusiveReadOnly, GetPassword(cn));
}
ArrayList tables = db.EnumTables();
foreach (string table in tables)
{
IVistaDBTableSchema tblStructure = db.TableSchema(table);
//==================================================================
// This works around a change that was made to the VistaDB provider
// It's ugly, we know
//==================================================================
IEnumerator enumerator = null;
if (useOldForeignKeyWay)
{
enumerator = tblStructure.ForeignKeys.GetEnumerator();
}
else
{
try
{
enumerator = tblStructure.ForeignKeys.Values.GetEnumerator();
}
catch
{
enumerator = tblStructure.ForeignKeys.GetEnumerator();
useOldForeignKeyWay = true;
}
}
// Okay, now that the version issues are over we just use the 'enumerator'
while (enumerator.MoveNext())
{
IVistaDBRelationshipInformation relInfo = enumerator.Current as IVistaDBRelationshipInformation;
if (relInfo.ForeignTable != tableName && relInfo.PrimaryTable != tableName)
{
continue;
}
string fCols = relInfo.ForeignKey;
string pCols = String.Empty;
string primaryTbl = relInfo.PrimaryTable;
string pkName = "";
using (IVistaDBTableSchema pkTableStruct = db.TableSchema(primaryTbl))
{
foreach (IVistaDBIndexInformation idxInfo in pkTableStruct.Indexes)
{
if (!idxInfo.Primary)
{
continue;
}
pkName = idxInfo.Name;
pCols = idxInfo.KeyExpression;
break;
}
}
string [] fColumns = fCols.Split(';');
string [] pColumns = pCols.Split(';');
for (int i = 0; i < fColumns.GetLength(0); i++)
{
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["PK_TABLE_CATALOG"] = GetDatabaseName();
row["PK_TABLE_SCHEMA"] = DBNull.Value;
row["FK_TABLE_CATALOG"] = DBNull.Value;
row["FK_TABLE_SCHEMA"] = DBNull.Value;
row["FK_TABLE_NAME"] = tblStructure.Name;
row["PK_TABLE_NAME"] = relInfo.PrimaryTable;
row["ORDINAL"] = 0;
row["FK_NAME"] = relInfo.Name;
row["PK_NAME"] = pkName;
row["PK_COLUMN_NAME"] = pColumns[i];
row["FK_COLUMN_NAME"] = fColumns[i];
row["UPDATE_RULE"] = relInfo.UpdateIntegrity;
row["DELETE_RULE"] = relInfo.DeleteIntegrity;
}
}
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(metaData);
}
DataTable IPlugin.GetTableColumns(string database, string table)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateColumnsDataTable();
using (VistaDBConnection cn = new VistaDBConnection(context.ConnectionString))
{
db = DDA.OpenDatabase(this.GetFullDatabaseName(), VistaDBDatabaseOpenMode.NonexclusiveReadOnly, GetPassword(cn));
}
ArrayList tables = db.EnumTables();
IVistaDBTableSchema tblStructure = db.TableSchema(table);
foreach (IVistaDBColumnAttributes c in tblStructure)
{
string colName = c.Name;
string def = "";
if (tblStructure.Defaults.Contains(colName))
{
def = tblStructure.Defaults[colName].Expression;
}
int width = c.MaxLength; //c.ColumnWidth;
int dec = 0; //c.ColumnDecimals;
int length = 0;
int octLength = width;
IVistaDBIdentityInformation identity = null;
if (tblStructure.Identities.Contains(colName))
{
identity = tblStructure.Identities[colName];
}
string[] pks = null;
if (tblStructure.Indexes.Contains("PrimaryKey"))
{
pks = tblStructure.Indexes["PrimaryKey"].KeyExpression.Split(';');
}
else
{
foreach (IVistaDBIndexInformation pk in tblStructure.Indexes)
{
if (pk.Primary)
{
pks = pk.KeyExpression.Split(';');
break;
}
}
}
System.Collections.Hashtable pkCols = null;
if (pks != null)
{
pkCols = new Hashtable();
foreach (string pkColName in pks)
{
pkCols[pkColName] = true;
}
}
switch (c.Type)
{
case VistaDBType.Char:
case VistaDBType.NChar:
case VistaDBType.NText:
case VistaDBType.NVarChar:
case VistaDBType.Text:
case VistaDBType.VarChar:
length = width;
width = 0;
dec = 0;
break;
case VistaDBType.Money:
case VistaDBType.Float:
case VistaDBType.Decimal:
case VistaDBType.Real:
break;
default:
width = 0;
dec = 0;
break;
}
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["TABLE_NAME"] = tblStructure.Name;
row["COLUMN_NAME"] = c.Name;
row["ORDINAL_POSITION"] = c.RowIndex;
row["IS_NULLABLE"] = c.AllowNull;
row["COLUMN_HASDEFAULT"] = def == string.Empty ? false : true;
row["COLUMN_DEFAULT"] = def;
row["IS_AUTO_KEY"] = identity == null ? false : true;
row["AUTO_KEY_SEED"] = 1;
row["AUTO_KEY_INCREMENT"] = identity == null ? 0 : Convert.ToInt32(identity.StepExpression);
row["TYPE_NAME"] = c.Type.ToString();
row["NUMERIC_PRECISION"] = width;
row["NUMERIC_SCALE"] = dec;
row["CHARACTER_MAXIMUM_LENGTH"] = length;
row["CHARACTER_OCTET_LENGTH"] = octLength;
row["DESCRIPTION"] = c.Description;
string type = (string)row["TYPE_NAME"];
row["TYPE_NAME_COMPLETE"] = this.GetDataTypeNameComplete(type, length, (short)width, (short)dec);
if (c.Type == VistaDBType.Timestamp)
{
row["IS_COMPUTED"] = true;
}
row["IS_CONCURRENCY"] = type == "Timestamp" ? true : false;
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(metaData);
}
public void GetDBCompexInfo(string dbName)
{
try
{
using (IVistaDBDDA conn = VistaDBEngine.Connections.OpenDDA())
{
using (IVistaDBDatabase db = conn.OpenDatabase(dbName, VistaDBDatabaseOpenMode.ExclusiveReadOnly, null))
{
Console.WriteLine("METAINFORMATION FOR " + dbName + " DATABASE");
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Table Description: " + db.Description);
Console.WriteLine("Row count: " + db.RowCount.ToString());
Console.WriteLine("PageSize: " + db.PageSize.ToString());
Console.WriteLine("Open mode: " + db.Mode.ToString());
Console.WriteLine("Culture: " + db.Culture.ToString());
Console.WriteLine("Case Sensitive: " + db.CaseSensitive.ToString());
ArrayList tables = db.EnumTables();
foreach (string table in tables)
{
IVistaDBTableStructure tblStructure = db.TableStructure(table);
Console.WriteLine("============================================");
Console.WriteLine("Table " + table);
Console.WriteLine("============================================");
//columns
Console.WriteLine("COLUMNS:");
foreach (IVistaDBColumnAttributes colInfo in tblStructure)
{
Console.WriteLine("\t" + colInfo.Name);
//use colInfo for getting columns metadata
}
//indexes
Console.WriteLine("INDEXES:");
foreach (IVistaDBIndexInformation indexInfo in tblStructure.Indexes)
{
Console.WriteLine("\t" + indexInfo.Name);
//use indexInfo for getting columns metadata
}
//constraints
Console.WriteLine("CONSTRAINTS:");
foreach (IVistaDBConstraintInformation constrInfo in tblStructure.Constraints)
{
Console.WriteLine("\t" + constrInfo.Name);
//use constrInfo for getting columns metadata
}
//foreignKeys
Console.WriteLine("FOREIGN KEYS:");
foreach (IVistaDBRelationshipInformation relInfo in tblStructure.ForeignKeys)
{
Console.WriteLine("\t" + relInfo.Name);
//use foreignKeys for getting columns metadata
}
}
}
}
}
catch (VistaDBException ex)
{
}
catch
{
}
}
public DataTable GetColumns(string tableName)
{
DataTable metaData = new DataTable();
//metaData.Columns.Add("TABLE_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("TABLE_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_GUID", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_PROPID", Type.GetType("System.String"));
//metaData.Columns.Add("ORDINAL_POSITION", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_HASDEFAULT", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_DEFAULT", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_FLAGS", Type.GetType("System.String"));
//metaData.Columns.Add("IS_NULLABLE", Type.GetType("System.String"));
//metaData.Columns.Add("DATA_TYPE", Type.GetType("System.String"));
//metaData.Columns.Add("TYPE_GUID", Type.GetType("System.String"));
//metaData.Columns.Add("CHARACTER_MAXIMUM_LENGTH", Type.GetType("System.String"));
//metaData.Columns.Add("CHARACTER_OCTET_LENGTH", Type.GetType("System.String"));
//metaData.Columns.Add("NUMERIC_PRECISION", Type.GetType("System.String"));
//metaData.Columns.Add("NUMERIC_SCALE", Type.GetType("System.String"));
//metaData.Columns.Add("DATETIME_PRECISION", Type.GetType("System.String"));
//metaData.Columns.Add("CHARACTER_SET_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("CHARACTER_SET_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("CHARACTER_SET_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("COLLATION_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("COLLATION_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("COLLATION_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("DOMAIN_CATALOG", Type.GetType("System.String"));
//metaData.Columns.Add("DOMAIN_SCHEMA", Type.GetType("System.String"));
//metaData.Columns.Add("DOMAIN_NAME", Type.GetType("System.String"));
//metaData.Columns.Add("DESCRIPTION", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_LCID", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_COMPFLAGS", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_SORTID", Type.GetType("System.String"));
//metaData.Columns.Add("COLUMN_TDSCOLLATION", Type.GetType("System.String"));
//metaData.Columns.Add("IS_COMPUTED", Type.GetType("System.String"));
//metaData.Columns.Add("IS_AUTO_KEY", Type.GetType("System.String"));
//metaData.Columns.Add("AUTO_KEY_SEED", Type.GetType("System.String"));
//metaData.Columns.Add("AUTO_KEY_INCREMENT", Type.GetType("System.String"));
metaData.Columns.Add("TABLE_NAME", Type.GetType("System.String"));
metaData.Columns.Add("COLUMN_NAME", Type.GetType("System.String"));
metaData.Columns.Add("ORDINAL_POSITION", Type.GetType("System.Int32"));
metaData.Columns.Add("IS_NULLABLE", Type.GetType("System.Boolean"));
metaData.Columns.Add("COLUMN_HASDEFAULT", Type.GetType("System.Boolean"));
metaData.Columns.Add("COLUMN_DEFAULT", Type.GetType("System.String"));
metaData.Columns.Add("IS_AUTO_KEY", Type.GetType("System.Boolean"));
metaData.Columns.Add("AUTO_KEY_SEED", Type.GetType("System.Int32"));
metaData.Columns.Add("AUTO_KEY_INCREMENT", Type.GetType("System.Int32"));
metaData.Columns.Add("DATA_TYPE_NAME", Type.GetType("System.String"));
metaData.Columns.Add("NUMERIC_PRECISION", Type.GetType("System.Int32"));
metaData.Columns.Add("NUMERIC_SCALE", Type.GetType("System.Int32"));
metaData.Columns.Add("CHARACTER_MAXIMUM_LENGTH", Type.GetType("System.Int32"));
metaData.Columns.Add("CHARACTER_OCTET_LENGTH", Type.GetType("System.Int32"));
metaData.Columns.Add("DESCRIPTION", Type.GetType("System.String"));
metaData.Columns.Add("IS_PRIMARY_KEY", Type.GetType("System.Boolean"));
IVistaDBDatabase db = DDA.OpenDatabase(dbName, VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
IVistaDBTableStructure tblStructure = db.TableStructure(tableName);
foreach (IVistaDBColumnAttributes c in tblStructure)
{
string colName = c.Name;
string def = "";
if (tblStructure.Defaults.Contains(colName))
{
def = tblStructure.Defaults[colName].Expression;
}
int width = c.MaxLength; //c.ColumnWidth;
int dec = 0; //c.ColumnDecimals;
int length = 0;
int octLength = width;
IVistaDBIdentityInformation identity = null;
if (tblStructure.Identities.Contains(colName))
{
identity = tblStructure.Identities[colName];
}
string[] pks = null;
if (tblStructure.Indexes.Contains("PrimaryKey"))
{
pks = tblStructure.Indexes["PrimaryKey"].KeyExpression.Split(',');
}
else
{
foreach (IVistaDBIndexInformation pk in tblStructure.Indexes)
{
if (pk.Primary)
{
pks = pk.KeyExpression.Split(',');
break;
}
}
}
System.Collections.Hashtable pkCols = null;
if (pks != null)
{
pkCols = new Hashtable();
foreach (string pkColName in pks)
{
pkCols[pkColName] = true;
}
}
switch (c.Type)
{
case VistaDBType.Char:
case VistaDBType.NChar:
case VistaDBType.NText:
case VistaDBType.NVarchar:
case VistaDBType.Text:
case VistaDBType.Varchar:
length = width;
width = 0;
dec = 0;
break;
case VistaDBType.Currency:
case VistaDBType.Double:
case VistaDBType.Decimal:
case VistaDBType.Single:
break;
default:
width = 0;
dec = 0;
break;
}
metaData.Rows.Add(new object[]
{
tblStructure.Name,
c.Name,
c.RowIndex,
c.AllowNull,
def == string.Empty ? false : true,
def,
identity == null ? false : true,
1,
identity == null ? 0 : Convert.ToInt32(identity.StepExpression),
c.Type.ToString(),
width,
dec,
length,
octLength,
c.Description,
pkCols == null ? false : pkCols.Contains(colName)
});
}
return(metaData);
}
DataTable IMyMetaPlugin.GetForeignKeys(string database, string tableName)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateForeignKeysDataTable();
db = DDA.OpenDatabase(this.GetFullDatabaseName(),
VistaDBDatabaseOpenMode.NonexclusiveReadOnly, "");
ArrayList tables = db.EnumTables();
foreach (string table in tables)
{
IVistaDBTableSchema tblStructure = db.TableSchema(table);
foreach (IVistaDBRelationshipInformation relInfo in tblStructure.ForeignKeys)
{
if (relInfo.ForeignTable != tableName && relInfo.PrimaryTable != tableName)
{
continue;
}
string fCols = relInfo.ForeignKey;
string pCols = String.Empty;
string primaryTbl = relInfo.PrimaryTable;
string pkName = "";
using (IVistaDBTableSchema pkTableStruct = db.TableSchema(primaryTbl))
{
foreach (IVistaDBIndexInformation idxInfo in pkTableStruct.Indexes)
{
if (!idxInfo.Primary)
{
continue;
}
pkName = idxInfo.Name;
pCols = idxInfo.KeyExpression;
break;
}
}
string [] fColumns = fCols.Split(';');
string [] pColumns = pCols.Split(';');
for (int i = 0; i < fColumns.GetLength(0); i++)
{
DataRow row = metaData.NewRow();
metaData.Rows.Add(row);
row["PK_TABLE_CATALOG"] = GetDatabaseName();
row["PK_TABLE_SCHEMA"] = DBNull.Value;
row["FK_TABLE_CATALOG"] = DBNull.Value;
row["FK_TABLE_SCHEMA"] = DBNull.Value;
row["FK_TABLE_NAME"] = tblStructure.Name;
row["PK_TABLE_NAME"] = relInfo.PrimaryTable;
row["ORDINAL"] = 0;
row["FK_NAME"] = relInfo.Name;
row["PK_NAME"] = pkName;
row["PK_COLUMN_NAME"] = pColumns[i];
row["FK_COLUMN_NAME"] = fColumns[i];
row["UPDATE_RULE"] = relInfo.UpdateIntegrity;
row["DELETE_RULE"] = relInfo.DeleteIntegrity;
}
}
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(metaData);
}