/*
** Name: readSqlData
**
** Description:
** Reads a SqlNull data value from the current input message.
**
** A SqlNull data value is composed of simply a data indicator
** byte which must be 0 (NULL data value).
**
** Input:
** None.
**
** Output:
** value SQL data value.
**
** Returns:
** void.
**
** History:
** 22-Sep-03 (gordy)
** Created.
*/
public void readSqlData( SqlNull value )
{
if ( readSqlDataIndicator() ) // Read data indicator byte.
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR ); // Should be NULL.
else
value.setNull(); // Shouldn't be needed, but just to be safe...
return;
}
/*
** Name: write
**
** Description:
** Writes a SqlNull data value to the current input message.
**
** A SqlNull data value is composed of simply a data indicator
** byte.
**
** Input:
** value SQL data value.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 1-Dec-03 (gordy)
** Created.
*/
public void write(SqlNull value)
{
if (writeSqlDataIndicator(value)) // Write data indicator byte.
throw SqlEx.get(ERR_GC4002_PROTOCOL_ERR); // Should be NULL.
return;
}
/*
** Name: allocateRowBuffer
**
** Description:
** Allocate the column data array for a row and populate
** the array with a SqlData object for each column based
** on the column data type.
**
** Input:
** rsmd Row-set Meta-data.
**
** Output:
** None.
**
** Returns:
** SqlData[] Column data array.
**
** History:
** 14-May-99 (gordy)
** Created.
** 10-May-01 (gordy)
** The character datatypes (CHAR, VARCHAR, LONGVARCHAR) may now
** be sent as UCS2 character arrays in addition to the existing
** Ingres Character Set strings. The DBMS datatype is used to
** distinguish the transport format.
** 31-Oct-02 (gordy)
** Adapted for generic GCF driver.
** 4-Aug-03 (gordy)
** Extracted from readData() to separate row and column processing.
** 22-Sep-03 (gordy)
** Changed to use SQL Data objects to hold column values.
** 6-Jan-04 (thoda04)
** Added BigInt support.
** 16-Jun-06 (gordy)
** ANSI Date/Time data type support.
** 7-Dec-09 (gordy, ported by thoda04)
** Support BOOLEAN columns.
*/
private SqlData[] allocateRowBuffer( AdvanRSMD rsmd )
{
SqlData[] row = new SqlData[ rsmd.count ];
for( int col = 0; col < rsmd.count; col++ )
{
switch( rsmd.desc[ col ].sql_type )
{
case ProviderType.DBNull : row[ col ] = new SqlNull(); break;
case ProviderType.TinyInt : row[ col ] = new SqlTinyInt(); break;
case ProviderType.SmallInt: row[ col ] = new SqlSmallInt(); break;
case ProviderType.Integer : row[ col ] = new SqlInt(); break;
case ProviderType.BigInt: row[ col ] = new SqlBigInt(); break;
case ProviderType.Single : row[ col ] = new SqlReal(); break;
case ProviderType.Double : row[ col ] = new SqlDouble(); break;
case ProviderType.Numeric:
case ProviderType.Decimal : row[ col ] = new SqlDecimal(); break;
case ProviderType.Boolean : row[ col ] = new SqlBool(); break;
case ProviderType.Date : row[col] = new SqlDate(); break;
case ProviderType.Time:
row[col] = new SqlTime(rsmd.desc[col].dbms_type);
break;
case ProviderType.Interval:
case ProviderType.IntervalDayToSecond:
case ProviderType.IntervalYearToMonth:
row[col] = new SqlInterval(rsmd.desc[col].dbms_type);
break;
case ProviderType.DateTime:
switch (rsmd.desc[col].dbms_type)
{
case DBMS_TYPE_IDATE:
row[col] = new IngresDate(conn.osql_dates,
conn.timeValuesInGMT());
break;
default:
row[col] = new SqlTimestamp(rsmd.desc[col].dbms_type);
break;
}
break;
case ProviderType.Binary :
row[ col ] = new SqlByte( rsmd.desc[ col ].length );
break;
case ProviderType.VarBinary :
row[ col ] = new SqlVarByte( rsmd.desc[ col ].length );
break;
case ProviderType.Char :
if ( rsmd.desc[ col ].dbms_type != DBMS_TYPE_NCHAR )
row[ col ] = new SqlChar( msg.getCharSet(),
rsmd.desc[ col ].length );
else
row[ col ] = new SqlNChar(rsmd.desc[col].length / 2 );
break;
case ProviderType.VarChar :
if ( rsmd.desc[ col ].dbms_type != DBMS_TYPE_NVARCHAR )
row[col] = new SqlVarChar(msg.getCharSet(),
rsmd.desc[col].length );
else
row[col] = new SqlNVarChar( rsmd.desc[col].length / 2 );
break;
case ProviderType.LongVarBinary :
row[ col ] = new SqlLongByte( (SqlStream.IStreamListener)this );
break;
case ProviderType.LongVarChar :
if ( rsmd.desc[ col ].dbms_type != DBMS_TYPE_LONG_NCHAR )
row[ col ] = new SqlLongChar( msg.getCharSet(),
(SqlStream.IStreamListener)this );
else
row[ col ] = new SqlLongNChar(
(SqlStream.IStreamListener)this );
break;
default :
if ( trace.enabled( 1 ) )
trace.write( tr_id + ": unexpected SQL type " +
rsmd.desc[ col ].sql_type );
throw SqlEx.get( ERR_GC4002_PROTOCOL_ERR );
}
}
return( row );
}
/*
** Name: getStorage
**
** Description:
** Allocates storage for SQL data values base on the SQL type
** and optional alternate storage format. The class of the
** object returned is defined in the class description.
**
** Input:
** sqlType SQL type.
** alt True for alternate storage format.
**
** Output:
** None.
**
** Returns:
** SqlData SQL data value.
**
** History:
** 1-Dec-03 (gordy)
** Created.
** 19-Jun-06 (gordy)
** ANSI Date/Time data type support. IngresDate is now
** the alternate storage for DATE/TIME/TIMESTAMP and
** SqlDate/SqlTime/SqlTimestamp are the primary storage.
** 3-Mar-10 (thoda04) SIR 123368
** Added support for IngresType.IngresDate parameter data type.
*/
/// <summary>
/// Allocates storage for SQL data values base on the SQL type
/// and optional alternate storage format. The class of the
/// object returned is defined in the class description.
/// </summary>
/// <param name="sqlType">SQL type.</param>
/// <param name="alt">True for alternate storage format.</param>
/// <returns>SQL data value.</returns>
private SqlData getStorage(ProviderType sqlType, bool alt)
{
SqlData sqlData;
switch (sqlType)
{
case ProviderType.DBNull: sqlData = new SqlNull(); break;
case ProviderType.TinyInt: sqlData = new SqlTinyInt(); break;
case ProviderType.SmallInt: sqlData = new SqlSmallInt(); break;
case ProviderType.Integer: sqlData = new SqlInt(); break;
case ProviderType.Real: sqlData = new SqlReal(); break;
case ProviderType.Double: sqlData = new SqlDouble(); break;
case ProviderType.Binary: sqlData = new SqlByte(); break;
case ProviderType.VarBinary: sqlData = new SqlVarByte(); break;
case ProviderType.LongVarBinary: sqlData = new SqlLongByte(); break;
case ProviderType.Boolean:
sqlData = alt ? (SqlData)(new SqlTinyInt())
: (SqlData)(new SqlBool());
break;
case ProviderType.BigInt:
sqlData = alt ? (SqlData)(new SqlDouble())
: (SqlData)(new SqlBigInt());
break;
case ProviderType.Decimal:
sqlData = alt ? (SqlData)(new SqlDouble())
: (SqlData)(new SqlDecimal());
break;
case ProviderType.Char:
sqlData = alt ? (SqlData)(new SqlChar(msg.getCharSet()))
: (SqlData)(new SqlNChar());
break;
case ProviderType.VarChar:
sqlData = alt ? (SqlData)(new SqlVarChar(msg.getCharSet()))
: (SqlData)(new SqlNVarChar());
break;
case ProviderType.LongVarChar:
sqlData = alt ? (SqlData)(new SqlLongChar(msg.getCharSet()))
: (SqlData)(new SqlLongNChar());
break;
case ProviderType.Date:
sqlData = alt ? (SqlData)(new IngresDate(conn.osql_dates,
conn.timeValuesInGMT()))
: (SqlData)(new SqlDate());
break;
case ProviderType.Time:
sqlData = alt ? (SqlData)(new IngresDate(conn.osql_dates,
conn.timeValuesInGMT()))
: (SqlData)(new SqlTime(
conn.osql_dates ? DBMS_TYPE_TMWO : DBMS_TYPE_TMTZ));
break;
case ProviderType.DateTime:
case ProviderType.IngresDate:
sqlData = alt ? (SqlData)(new IngresDate(conn.osql_dates,
conn.timeValuesInGMT()))
: (SqlData)(new SqlTimestamp(
conn.osql_dates ? DBMS_TYPE_TSWO : DBMS_TYPE_TSTZ));
break;
default:
throw SqlEx.get(ERR_GC401A_CONVERSION_ERR);
}
return (sqlData);
}