public TableKeySchema[] GetTableKeys(string connectionString, TableSchema table)
{
var keys = new List <TableKeySchema>();
var foreignColumns = new List <string>();
var primaryColumns = new List <string>();
var extendedProperties = new List <ExtendedProperty>();
using (IVistaDBDatabase vistaDb = GetDatabase(connectionString))
{
if (vistaDb == null)
{
return(keys.ToArray());
}
IVistaDBTableSchema vistaTable = vistaDb.TableSchema(table.Name);
if (vistaTable == null)
{
return(keys.ToArray());
}
foreach (IVistaDBRelationshipInformation vistaKey in vistaTable.ForeignKeys)
{
foreignColumns.Clear();
foreignColumns.AddRange(vistaKey.ForeignKey.Split(
new[] { ';' }, StringSplitOptions.RemoveEmptyEntries));
IVistaDBTableSchema vistaPrimaryTable = vistaDb.TableSchema(vistaKey.PrimaryTable);
if (vistaPrimaryTable == null)
{
continue;
}
primaryColumns.Clear();
//find primary key index
foreach (IVistaDBIndexInformation i in vistaPrimaryTable.Indexes)
{
if (i.Primary)
{
primaryColumns.AddRange(i.KeyExpression.Split(
new[] { ';' }, StringSplitOptions.RemoveEmptyEntries));
}
}
extendedProperties.Clear();
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.Description, vistaKey.Description));
var key = new TableKeySchema(
table.Database, vistaKey.Name,
foreignColumns.ToArray(),
string.Empty, vistaKey.ForeignTable,
primaryColumns.ToArray(),
string.Empty, vistaKey.PrimaryTable,
extendedProperties.ToArray());
keys.Add(key);
}
}
return(keys.ToArray());
}
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.GetTableNames())
{
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());
}
public PrimaryKeySchema GetTablePrimaryKey(string connectionString, TableSchema table)
{
using (IVistaDBDatabase vistaDb = GetDatabase(connectionString))
{
if (vistaDb == null)
{
return(null);
}
IVistaDBTableSchema vistaTable = vistaDb.TableSchema(table.Name);
if (vistaTable == null)
{
return(null);
}
foreach (IVistaDBIndexInformation vistaIndex in vistaTable.Indexes)
{
if (!vistaIndex.Primary)
{
continue;
}
var key = new PrimaryKeySchema(
table, vistaIndex.Name,
vistaIndex.KeyExpression.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries));
return(key);
}
}
return(null);
}
public ColumnSchema[] GetTableColumns(string connectionString, TableSchema table)
{
var columns = new List <ColumnSchema>();
var extendedProperties = new List <ExtendedProperty>();
using (IVistaDBDatabase vistaDb = GetDatabase(connectionString))
{
if (vistaDb == null)
{
return(columns.ToArray());
}
IVistaDBTableSchema vistaTable = vistaDb.TableSchema(table.Name);
if (vistaTable == null)
{
return(columns.ToArray());
}
foreach (IVistaDBColumnAttributes vistaColumn in vistaTable)
{
string nativeType = vistaColumn.Type.ToString();
extendedProperties.Clear();
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.Description, vistaColumn.Description));
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.ObjectID, vistaColumn.UniqueId));
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.DefaultValue, ""));
extendedProperties.Add(ExtendedProperty.Readonly("CS_CodePage", vistaColumn.CodePage));
extendedProperties.Add(ExtendedProperty.Readonly("CS_Encrypted", vistaColumn.Encrypted));
extendedProperties.Add(ExtendedProperty.Readonly("CS_Packed", vistaColumn.Packed));
extendedProperties.Add(ExtendedProperty.Readonly("CS_ReadOnly", vistaColumn.ReadOnly));
bool isIdentity = false;
foreach (IVistaDBIdentityInformation identity in vistaTable.Identities)
{
isIdentity = (identity.ColumnName == vistaColumn.Name);
if (isIdentity)
{
break;
}
}
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.IsIdentity, isIdentity));
var column = new ColumnSchema(table, vistaColumn.Name, GetDbType(nativeType),
nativeType, vistaColumn.MaxLength, 0, 0, vistaColumn.AllowNull,
extendedProperties.ToArray());
columns.Add(column);
}
}
return(columns.ToArray());
}
List <string> IPlugin.GetPrimaryKeyColumns(string database, string table)
{
List <string> primaryKeys = new List <string>();
IVistaDBDatabase db = null;
try
{
using (VistaDBConnection cn = new VistaDBConnection(context.ConnectionString))
{
db = DDA.OpenDatabase(this.GetFullDatabaseName(), VistaDBDatabaseOpenMode.NonexclusiveReadOnly, GetPassword(cn));
}
IVistaDBTableSchema tblStructure = db.TableSchema(table);
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;
}
}
}
if (pks != null)
{
foreach (string pkColName in pks)
{
primaryKeys.Add(pkColName);
}
}
}
finally
{
if (db != null)
{
db.Close();
}
}
return(primaryKeys);
}
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);
}
public IndexSchema[] GetTableIndexes(string connectionString, TableSchema table)
{
var indexes = new List <IndexSchema>();
var memberColumns = new List <string>();
var extendedProperties = new List <ExtendedProperty>();
using (IVistaDBDatabase vistaDb = GetDatabase(connectionString))
{
if (vistaDb == null)
{
return(indexes.ToArray());
}
IVistaDBTableSchema vistaTable = vistaDb.TableSchema(table.Name);
if (vistaTable == null)
{
return(indexes.ToArray());
}
foreach (IVistaDBIndexInformation vistaIndex in vistaTable.Indexes)
{
memberColumns.Clear();
foreach (IVistaDBKeyColumn keyColumn in vistaIndex.KeyStructure)
{
memberColumns.Add(vistaTable[keyColumn.RowIndex].Name);
}
extendedProperties.Clear();
extendedProperties.Add(ExtendedProperty.Readonly(ExtendedPropertyNames.Description, vistaIndex.Description));
extendedProperties.Add(ExtendedProperty.Readonly("CS_FastTextSearch", vistaIndex.FullTextSearch));
var index = new IndexSchema(table, vistaIndex.Name, vistaIndex.Primary,
vistaIndex.Unique, false,
memberColumns.ToArray(),
extendedProperties.ToArray());
indexes.Add(index);
}
}
return(indexes.ToArray());
}
DataTable IPlugin.GetTables(string database)
{
DataTable metaData = new DataTable();
IVistaDBDatabase db = null;
try
{
metaData = context.CreateTablesDataTable();
using (VistaDBConnection cn = new VistaDBConnection(context.ConnectionString))
{
db = DDA.OpenDatabase(this.GetFullDatabaseName(), VistaDBDatabaseOpenMode.NonexclusiveReadOnly, GetPassword(cn));
}
IVistaDBTableNameCollection tables = db.GetTableNames();
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);
}
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);
}
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);
}