/// <summary>
/// Retrieves a <c>DataTable</c> object representing the column
/// metadata of the given data reader's current result.
/// </summary>
/// <param name="reader">
/// A reader object for which to retrieve the column metadata.
/// </param>
/// <returns>
/// A <c>DataTable</c> object representing the column metadata of the
/// given data reader's current result.
/// </returns>
/// <exception cref="HsqlDataSourceException">
/// If a data access error occurs.
/// </exception>
public static DataTable CreateSchemaTable(HsqlDataReader reader)
{
Result result = reader.m_result;
int columnCount = result.getColumnCount();
ResultMetaData metaData = result.metaData;
DataTable table = CreateTable(columnCount);
bool includeKeyInfo = reader.HasCommandBehavior(CommandBehavior.KeyInfo);
Dictionary <ColumnIdentifier, KeyInfo> keyInfoMap = (includeKeyInfo)
? HsqlResultSetMetaData.GetKeyInfo(reader)
: null;
string catalogName = reader.OriginatingConnection.Database;
for (int i = 0; i < columnCount; i++)
{
bool isAutoIncrement = metaData.isIdentity[i];
string columnName = metaData.colLabels[i];
int columnOrdinal = i;
int columnSize = metaData.colSizes[i];
int numericPrecision = metaData.colSizes[i];
int numericScale = metaData.colScales[i];
bool isUnique = false; // isAutoIncrement;
bool isKey = isAutoIncrement;
string baseServerName = null;
string baseCatalogName = catalogName;//metaData.catalogNames[i];
string baseColumnName = metaData.colNames[i];
string baseSchemaName = metaData.schemaNames[i];
string baseTableName = metaData.tableNames[i];
int providerType = metaData.colTypes[i];
Type dataType = HsqlConvert.ToDataType(providerType);
int nullability = metaData.colNullable[i];
bool allowDBNull = isAutoIncrement || (nullability != 0);
bool isAliased = (columnName != baseColumnName);
bool isExpression = string.IsNullOrEmpty(baseTableName);
bool isIdentity = isAutoIncrement;
bool isRowVersion = false;
bool isHidden = false;
bool isLong = HsqlConvert.ToIsLongProviderType(providerType);
bool isReadOnly = !metaData.isWritable[i];
if ((columnSize == 0) &&
HsqlTypes.isCharacterType(providerType))
{
columnSize = HsqlTypes.getPrecision(providerType);
}
if ((numericPrecision == 0) &&
HsqlTypes.isNumberType(providerType))
{
numericPrecision = HsqlTypes.getPrecision(providerType);
}
if (includeKeyInfo)
{
if (!(string.IsNullOrEmpty(baseTableName) ||
string.IsNullOrEmpty(baseColumnName)))
{
ColumnIdentifier key = new ColumnIdentifier(
baseSchemaName, baseTableName, baseColumnName);
KeyInfo keyInfo;
if (keyInfoMap.TryGetValue(key, out keyInfo))
{
isKey = keyInfo.m_isKey;
isUnique = keyInfo.m_isUnique;
}
}
}
HsqlResultSetMetaData.AddRow(table, columnName, columnOrdinal,
columnSize, numericPrecision, numericScale, isUnique,
isKey, baseServerName, baseCatalogName, baseColumnName,
baseSchemaName, baseTableName, dataType, allowDBNull,
providerType, isAliased, isExpression, isIdentity,
isAutoIncrement, isRowVersion, isHidden, isLong,
isReadOnly);
}
DataColumnCollection columns = table.Columns;
int count = columns.Count;
for (int i = 0; i < count; i++)
{
columns[i].ReadOnly = true;
}
return(table);
}
/// <summary>
/// Computes the key info dictionary for the column metadata of the
/// given data reader.
/// </summary>
/// <remarks>
/// Depending upon the column metadata already present in the data
/// reader, it may be required to perform further access to the
/// originating data source using the reader's
/// <c>OriginatingConnection</c>. This in turn implies that the
/// <c>OriginatingConnection</c> must be open and must still
/// represent the originating session on the originating data source;
/// otherwise, the reported key info may be incorrect or the attempt
/// access the data source may simply fail.
/// </remarks>
/// <param name="reader">
/// The reader for which to compute the column metadata key info map.
/// </param>
/// <returns>
/// Map {ColumnIdentifier=>KeyInfo}
/// </returns>
/// <exception cref="HsqlDataSourceException">
/// If a data access error occurs.
/// </exception>
internal static Dictionary <ColumnIdentifier, KeyInfo> GetKeyInfo(
HsqlDataReader reader)
{
ResultMetaData metaData = reader.m_result.metaData;
Dictionary <TableIdentifier, object> tableSet
= new Dictionary <TableIdentifier, object>();
object placeholder = new object();
string[] schemaNames = metaData.schemaNames;
string[] tableNames = metaData.tableNames;
string[] columnNames = metaData.colNames;
int count = columnNames.Length;
for (int i = 0; i < count; i++)
{
string tableName = tableNames[i];
string columnName = columnNames[i];
if (string.IsNullOrEmpty(tableName) ||
string.IsNullOrEmpty(columnName))
{ // not a table column
continue;
}
string schemaName = schemaNames[i];
TableIdentifier tableIdentifier = new TableIdentifier(
schemaName, tableName);
tableSet[tableIdentifier] = placeholder;
}
Dictionary <ColumnIdentifier, KeyInfo> columnMap
= new Dictionary <ColumnIdentifier, KeyInfo>();
if (tableSet.Count == 0)
{
return(columnMap);
}
StringBuilder sb = new StringBuilder('(');
count = 0;
foreach (TableIdentifier tableIdentifier in tableSet.Keys)
{
if (count > 0)
{
sb.Append(" OR ");
}
count++;
sb.Append("(bri.table_schem");
string schemaName = tableIdentifier.m_schema;
if (string.IsNullOrEmpty(schemaName))
{
sb.Append(" IS NULL ");
}
else
{
sb.Append(" = ").Append(StringConverter.toQuotedString(
schemaName, '\'', /*escape inner quotes*/ true));
}
string tableName = tableIdentifier.m_table;
sb.Append(" AND bri.table_name = ").Append(
StringConverter.toQuotedString(tableName, '\'',
/*escape inner quotes*/ true));
sb.Append(')');
}
sb.Append(')');
string predicate = sb.ToString();
using (HsqlCommand command =
reader.OriginatingConnection.CreateCommand())
{
command.CommandText = string.Format(KeyInfoQuery, predicate);
command.CommandType = CommandType.Text;
using (HsqlDataReader keyInfoReader = command.ExecuteReader())
{
while (keyInfoReader.Read())
{
bool isKey = keyInfoReader.GetBoolean(3);
if (!isKey)
{
continue;
}
string schema = keyInfoReader.GetString(0);
string table = keyInfoReader.GetString(1);
string column = keyInfoReader.GetString(2);
ColumnIdentifier key = new ColumnIdentifier(schema,
table, column);
if (!columnMap.ContainsKey(key))
{
KeyInfo keyInfo = new KeyInfo();
keyInfo.m_isKey = true;
keyInfo.m_isUnique = false;
columnMap.Add(key, keyInfo);
}
}
}
}
return(columnMap);
}
internal void DeriveParametersInternal()
{
if (CommandType != CommandType.StoredProcedure)
{
throw new InvalidOperationException(string.Format(
"Operation not supported for CommandType: "
+ CommandType.ToString()));
}
Prepare();
HsqlStatement statement = m_statement;
ParameterMetaData pmd = statement.ParameterDescriptor.metaData;
string[] parameterNames = pmd.colNames;
int count = parameterNames.Length;
HsqlParameter[] parameters = new HsqlParameter[count];
for (int i = 0; i < count; i++)
{
string name = parameterNames[i];
ParameterMode mode = (ParameterMode)pmd.paramMode[i];
int type = pmd.colTypes[i];
int precision = pmd.colSizes[i];
int scale = pmd.colScales[i];
int nullability = pmd.colNullable[i];
HsqlProviderType providerType = (HsqlProviderType)type;
DbType dbType = HsqlConvert.ToDbType(providerType);
ParameterDirection?direction = HsqlConvert.ToParameterDirection(mode);
bool?isNullable = IsNullable(nullability);
bool isCharacter = IsCharacterType(type);
bool isNumber = (!isCharacter) && IsNumberType(type);
bool isTemporal = !(isCharacter || isNumber) && IsTemporalType(type);
int size = ToBufferSize(type, precision);
if (isCharacter)
{
precision = 0;
scale = 0;
}
else if (isNumber || isTemporal)
{
if (precision == 0)
{
precision = ToDefaultPrecision(type);
}
}
HsqlParameter parameter = new HsqlParameter();
parameter.DbType = dbType;
if (direction != null)
{
parameter.Direction = direction.Value;
}
if (isNullable != null)
{
parameter.IsNullable = isNullable.Value;
}
parameter.ParameterName = name;
parameter.Precision = (byte)Math.Min(byte.MaxValue, precision);
parameter.ProviderType = providerType;
parameter.Scale = (byte)Math.Min(byte.MaxValue, scale);
parameter.Size = size;
parameter.SourceVersion = DataRowVersion.Default;
parameters[i] = parameter;
}
HsqlParameterCollection pc = Parameters;
pc.Clear();
foreach (HsqlParameter parameter in parameters)
{
pc.Add(parameter);
}
}
internal static string ResultMetaDataToString(ResultMetaData rmd)
{
StringBuilder sb = new StringBuilder();
int columnCount = rmd.colTypes.Length;
for (int i = 0; i < columnCount; i++)
{
if (i > 0)
{
sb.AppendLine(",");
}
sb.AppendFormat("{0}: ", i);
ColumnMetaData cmd = new ColumnMetaData();
int type = rmd.colTypes[i];
cmd.catalogName = (rmd.catalogNames[i] == null) ?
"" : rmd.catalogNames[i];
cmd.schemaName = (rmd.schemaNames[i] == null) ?
"" : rmd.schemaNames[i];
cmd.tableName = rmd.tableNames[i] == null ?
"" : rmd.tableNames[i];
cmd.columnName = rmd.colNames[i] == null ?
"" : rmd.colNames[i];
cmd.columnLabel = rmd.colLabels[i] == null ?
"" : rmd.colLabels[i];
cmd.columnType = type;
cmd.columnTypeName = HsqlTypes.getTypeString(type);
cmd.isWritable = rmd.isWritable[i];
cmd.isReadOnly = !cmd.isWritable;
cmd.isAutoIncrement = rmd.isIdentity[i];
cmd.isNullable = rmd.colNullable[i];
cmd.columnClassName = rmd.classNames[i];
if (string.IsNullOrEmpty(cmd.columnClassName))
{
cmd.columnClassName = HsqlTypes.getColStClsName(type);
}
if (HsqlTypes.acceptsPrecisionCreateParam(type))
{
if (rmd.colSizes[i] == 0)
{
cmd.columnDisplaySize = HsqlTypes.getMaxDisplaySize(type);
}
else
{
cmd.columnDisplaySize = rmd.colSizes[i];
if (HsqlTypes.acceptsScaleCreateParam(type))
{
if (rmd.colScales[i] != 0)
{
cmd.columnDisplaySize += (1 + rmd.colScales[i]);
}
}
}
}
else
{
cmd.columnDisplaySize = HsqlTypes.getMaxDisplaySize(type);
}
if (HsqlTypes.isNumberType(type)
&& HsqlTypes.acceptsPrecisionCreateParam(type))
{
cmd.precision = rmd.colSizes[i];
if (cmd.precision == 0)
{
cmd.precision = HsqlTypes.getPrecision(type);
}
}
else
{
cmd.precision = HsqlTypes.getPrecision(type);
}
if (HsqlTypes.acceptsScaleCreateParam(type))
{
cmd.scale = rmd.colScales[i];
}
JavaBoolean iua = HsqlTypes.isUnsignedAttribute(type);
cmd.isSigned = ((iua != null) && !iua.booleanValue());
JavaBoolean ics = HsqlTypes.isCaseSensitive(type);
cmd.isCaseSensitive = ((ics != null) && ics.booleanValue());
cmd.isSearchable = HsqlTypes.isSearchable(type);
sb.Append(cmd.toString());
}
return sb.ToString();
}
internal static string ResultMetaDataToString(ResultMetaData rmd)
{
StringBuilder sb = new StringBuilder();
int columnCount = rmd.colTypes.Length;
for (int i = 0; i < columnCount; i++)
{
if (i > 0)
{
sb.AppendLine(",");
}
sb.AppendFormat("{0}: ", i);
ColumnMetaData cmd = new ColumnMetaData();
int type = rmd.colTypes[i];
cmd.catalogName = (rmd.catalogNames[i] == null) ?
"" : rmd.catalogNames[i];
cmd.schemaName = (rmd.schemaNames[i] == null) ?
"" : rmd.schemaNames[i];
cmd.tableName = rmd.tableNames[i] == null ?
"" : rmd.tableNames[i];
cmd.columnName = rmd.colNames[i] == null ?
"" : rmd.colNames[i];
cmd.columnLabel = rmd.colLabels[i] == null ?
"" : rmd.colLabels[i];
cmd.columnType = type;
cmd.columnTypeName = HsqlTypes.getTypeString(type);
cmd.isWritable = rmd.isWritable[i];
cmd.isReadOnly = !cmd.isWritable;
cmd.isAutoIncrement = rmd.isIdentity[i];
cmd.isNullable = rmd.colNullable[i];
cmd.columnClassName = rmd.classNames[i];
if (string.IsNullOrEmpty(cmd.columnClassName))
{
cmd.columnClassName = HsqlTypes.getColStClsName(type);
}
if (HsqlTypes.acceptsPrecisionCreateParam(type))
{
if (rmd.colSizes[i] == 0)
{
cmd.columnDisplaySize = HsqlTypes.getMaxDisplaySize(type);
}
else
{
cmd.columnDisplaySize = rmd.colSizes[i];
if (HsqlTypes.acceptsScaleCreateParam(type))
{
if (rmd.colScales[i] != 0)
{
cmd.columnDisplaySize += (1 + rmd.colScales[i]);
}
}
}
}
else
{
cmd.columnDisplaySize = HsqlTypes.getMaxDisplaySize(type);
}
if (HsqlTypes.isNumberType(type) &&
HsqlTypes.acceptsPrecisionCreateParam(type))
{
cmd.precision = rmd.colSizes[i];
if (cmd.precision == 0)
{
cmd.precision = HsqlTypes.getPrecision(type);
}
}
else
{
cmd.precision = HsqlTypes.getPrecision(type);
}
if (HsqlTypes.acceptsScaleCreateParam(type))
{
cmd.scale = rmd.colScales[i];
}
JavaBoolean iua = HsqlTypes.isUnsignedAttribute(type);
cmd.isSigned = ((iua != null) && !iua.booleanValue());
JavaBoolean ics = HsqlTypes.isCaseSensitive(type);
cmd.isCaseSensitive = ((ics != null) && ics.booleanValue());
cmd.isSearchable = HsqlTypes.isSearchable(type);
sb.Append(cmd.toString());
}
return(sb.ToString());
}
