private void BuildInformation(DataTable schemaTable)
{
DBSchemaRow[] rows = DBSchemaRow.GetSortedSchemaRows(schemaTable); // MDAC 60609
if ((null == rows) || (0 == rows.Length))
{
throw ADP.DynamicSQLNoTableInfo();
}
string baseServerName = ""; // MDAC 72721, 73599
string baseCatalogName = "";
string baseSchemaName = "";
string baseTableName = null;
for (int i = 0; i < rows.Length; ++i)
{
DBSchemaRow row = rows[i];
string tableName = row.BaseTableName;
if ((null == tableName) || (0 == tableName.Length))
{
rows[i] = null;
continue;
}
string serverName = row.BaseServerName;
string catalogName = row.BaseCatalogName;
string schemaName = row.BaseSchemaName;
if (null == serverName)
{
serverName = "";
}
if (null == catalogName)
{
catalogName = "";
}
if (null == schemaName)
{
schemaName = "";
}
if (null == baseTableName)
{
baseServerName = serverName;
baseCatalogName = catalogName;
baseSchemaName = schemaName;
baseTableName = tableName;
}
else if ((0 != ADP.SrcCompare(baseTableName, tableName)) ||
(0 != ADP.SrcCompare(baseSchemaName, schemaName)) ||
(0 != ADP.SrcCompare(baseCatalogName, catalogName)) ||
(0 != ADP.SrcCompare(baseServerName, serverName)))
{
throw ADP.DynamicSQLJoinUnsupported();
}
}
if (0 == baseServerName.Length)
{
baseServerName = null;
}
if (0 == baseCatalogName.Length)
{
baseServerName = null;
baseCatalogName = null;
}
if (0 == baseSchemaName.Length)
{
baseServerName = null;
baseCatalogName = null;
baseSchemaName = null;
}
if ((null == baseTableName) || (0 == baseTableName.Length))
{
throw ADP.DynamicSQLNoTableInfo();
}
if (!ADP.IsEmpty(this.quotePrefix) && (-1 != baseTableName.IndexOf(quotePrefix)))
{
throw ADP.DynamicSQLNestedQuote(baseTableName, quotePrefix);
}
if (!ADP.IsEmpty(this.quoteSuffix) && (-1 != baseTableName.IndexOf(quoteSuffix)))
{
throw ADP.DynamicSQLNestedQuote(baseTableName, quoteSuffix);
}
System.Text.StringBuilder quoted = new System.Text.StringBuilder();
if (null != baseServerName)
{
quoted.Append(QuotePrefix);
quoted.Append(baseServerName);
quoted.Append(QuoteSuffix);
quoted.Append(".");
}
if (null != baseCatalogName)
{
quoted.Append(QuotePrefix);
quoted.Append(baseCatalogName);
quoted.Append(QuoteSuffix);
quoted.Append(".");
}
if (null != baseSchemaName)
{
quoted.Append(QuotePrefix);
quoted.Append(baseSchemaName);
quoted.Append(QuoteSuffix);
quoted.Append(".");
}
quoted.Append(QuotePrefix);
quoted.Append(baseTableName);
quoted.Append(QuoteSuffix);
this.quotedBaseTableName = quoted.ToString();
this.dbSchemaRows = rows;
}
private void SetupSchemaWithKeyInfo(MissingMappingAction mappingAction, MissingSchemaAction schemaAction, bool gettingData, DataColumn parentChapterColumn, object chapterValue)
{
#if DEBUG
Debug.Assert(null != schemaTable, "null schematable");
if (AdapterSwitches.DataSchema.TraceVerbose)
{
ADP.TraceDataTable("SetupSchema", schemaTable);
}
#endif
DBSchemaRow[] schemaRows = DBSchemaRow.GetSortedSchemaRows(schemaTable); // MDAC 60609
Debug.Assert(null != schemaRows, "SchemaSetup - null DBSchemaRow[]");
int count = schemaRows.Length;
if (0 == count)
{
this.dataTable = null;
return;
}
bool addPrimaryKeys = (0 == this.dataTable.PrimaryKey.Length); // MDAC 67033
DataColumn[] keys = null;
int keyCount = 0;
bool isPrimary = true; // assume key info (if any) is about a primary key
int[] columnIndexMap = null;
bool[] chapterIndexMap = null;
int mappingCount = 0;
GenerateFieldNames(count);
DataColumnCollection columnCollection = null;
for (int sortedIndex = 0; sortedIndex < count; ++sortedIndex)
{
DBSchemaRow schemaRow = schemaRows[sortedIndex];
int unsortedIndex = schemaRow.UnsortedIndex; // MDAC 67050
DataColumnMapping columnMapping = null;
Type fieldType = schemaRow.DataType;
DataColumn dataColumn = null;
if (!schemaRow.IsHidden)
{
columnMapping = tableMapping.GetColumnMappingBySchemaAction(fieldNames[sortedIndex], mappingAction);
}
bool ischapter = false;
if ((null != columnMapping) && typeof(IDataReader).IsAssignableFrom(fieldType))
{
if (null == chapterIndexMap)
{
chapterIndexMap = new bool[count];
}
chapterIndexMap[unsortedIndex] = ischapter = true;
fieldType = typeof(Int32);
}
if (columnMapping != null)
{
dataColumn = columnMapping.GetDataColumnBySchemaAction(this.dataTable, fieldType, schemaAction);
}
if (null == dataColumn)
{
if (null == columnIndexMap)
{
columnIndexMap = CreateIndexMap(count, unsortedIndex);
}
columnIndexMap[unsortedIndex] = -1;
// if the column is not mapped and it is a key, then don't add any key information
if (schemaRow.IsKey)
{
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: partial primary key detected");
}
#endif
addPrimaryKeys = false; // don't add any future keys now
keys = null; // get rid of any keys we've seen
}
continue; // null means ignore (mapped to nothing)
}
if (ischapter)
{
if (null == dataColumn.Table)
{
dataColumn.AllowDBNull = false;
dataColumn.AutoIncrement = true;
dataColumn.ReadOnly = true;
}
else if (!dataColumn.AutoIncrement)
{
throw ADP.FillChapterAutoIncrement();
}
}
else // MDAC 67033
{
if (schemaRow.IsAutoIncrement && IsAutoIncrementType(fieldType))
{
// CONSIDER: use T-SQL "IDENT_INCR('table_or_view')" and "IDENT_SEED('table_or_view')"
// functions to obtain the actual increment and seed values
dataColumn.AutoIncrement = true;
if (!schemaRow.AllowDBNull) // MDAC 71060
{
dataColumn.AllowDBNull = false;
}
}
// setup maxLength, only for string columns since this is all the DataSet supports
if (fieldType == typeof(string))
{
//@devnote: schemaRow.Size is count of characters for string columns, count of bytes otherwise
dataColumn.MaxLength = schemaRow.Size;
}
if (schemaRow.IsReadOnly)
{
dataColumn.ReadOnly = true;
}
if (!schemaRow.AllowDBNull && (!schemaRow.IsReadOnly || schemaRow.IsKey)) // MDAC 71060, 72252
{
dataColumn.AllowDBNull = false;
}
if (schemaRow.IsUnique && !schemaRow.IsKey && !fieldType.IsArray)
{
// note, arrays are not comparable so only mark non-arrays as unique, ie timestamp columns
// are unique, but not comparable
dataColumn.Unique = true;
if (!schemaRow.AllowDBNull) // MDAC 71060
{
dataColumn.AllowDBNull = false;
}
}
}
if (null == dataColumn.Table)
{
if (null == columnCollection)
{
columnCollection = dataTable.Columns;
}
columnCollection.Add(dataColumn);
}
// The server sends us one key per table according to these rules.
//
// 1. If the table has a primary key, the server sends us this key.
// 2. If the table has a primary key and a unique key, it sends us the primary key
// 3. if the table has no primary key but has a unique key, it sends us the unique key
//
// In case 3, we will promote a unique key to a primary key IFF all the columns that compose
// that key are not nullable since no columns in a primary key can be null. If one or more
// of the keys is nullable, then we will add a unique constraint.
//
if (addPrimaryKeys && schemaRow.IsKey) // MDAC 67033
{
if (keys == null)
{
keys = new DataColumn[count];
}
keys[keyCount++] = dataColumn;
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: building list of " + ((isPrimary) ? "PrimaryKey" : "UniqueConstraint"));
}
#endif
// see case 3 above, we do want dataColumn.AllowDBNull not schemaRow.AllowDBNull
// otherwise adding PrimaryKey will change AllowDBNull to false
if (isPrimary && dataColumn.AllowDBNull) // MDAC 72241
{
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: changing PrimaryKey into UniqueContraint");
}
#endif
isPrimary = false;
}
}
if (null != columnIndexMap)
{
columnIndexMap[unsortedIndex] = dataColumn.Ordinal;
}
else if (unsortedIndex != dataColumn.Ordinal)
{
columnIndexMap = CreateIndexMap(count, unsortedIndex);
columnIndexMap[unsortedIndex] = dataColumn.Ordinal;
}
mappingCount++;
}
bool addDataRelation = false;
DataColumn chapterColumn = null;
if (null != chapterValue) // add the extra column in the child table
{
DataColumnMapping columnMapping = tableMapping.GetColumnMappingBySchemaAction(tableMapping.SourceTable, mappingAction);
if (null != columnMapping)
{
Type fieldType = chapterValue.GetType();
chapterColumn = columnMapping.GetDataColumnBySchemaAction(this.dataTable, fieldType, schemaAction);
if (null != chapterColumn)
{
if (null == chapterColumn.Table)
{
chapterColumn.ReadOnly = true; // MDAC 71878
chapterColumn.AllowDBNull = false;
if (null == columnCollection)
{
columnCollection = dataTable.Columns;
}
columnCollection.Add(chapterColumn);
addDataRelation = (null != parentChapterColumn);
}
mappingCount++;
}
}
}
object[] dataValues = null;
if (0 < mappingCount)
{
if ((null != this.dataSet) && null == this.dataTable.DataSet)
{
this.dataSet.Tables.Add(this.dataTable);
}
// setup the key
if (addPrimaryKeys && (null != keys)) // MDAC 67033
{
if (keyCount < keys.Length)
{
keys = ResizeColumnArray(keys, keyCount);
}
// MDAC 66188
if (isPrimary)
{
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: set_PrimaryKey");
}
#endif
this.dataTable.PrimaryKey = keys;
}
else
{
UniqueConstraint unique = new UniqueConstraint("", keys);
ConstraintCollection constraints = this.dataTable.Constraints;
int constraintCount = constraints.Count;
for (int i = 0; i < constraintCount; ++i)
{
if (unique.Equals(constraints[i]))
{
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: duplicate Contraint detected");
}
#endif
unique = null;
break;
}
}
if (null != unique)
{
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose)
{
Debug.WriteLine("SetupSchema: adding new UniqueConstraint");
}
#endif
constraints.Add(unique);
}
}
}
if (gettingData)
{
if (null == columnCollection)
{
columnCollection = dataTable.Columns;
}
_indexMap = columnIndexMap;
_chapterMap = chapterIndexMap;
dataValues = SetupMapping(count, columnCollection, chapterColumn, chapterValue);
}
#if DEBUG
else
{
this.mappedMode = -1;
}
#endif
}
else
{
this.dataTable = null;
}
if (addDataRelation)
{
AddRelation(parentChapterColumn, chapterColumn);
}
_readerDataValues = dataValues;
}
