List of usage examples for java.sql Types NULL
int NULL
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The constant in the Java programming language that identifies the generic SQL value NULL.
From source file:CreateNewTable.java
private static Vector getDataTypes(Connection con) throws SQLException { String structName = null, distinctName = null, javaName = null; // create a vector of class DataType initialized with // the SQL code, the SQL type name, and two null entries // for the local type name and the creation parameter(s) Vector dataTypes = new Vector(); dataTypes.add(new DataType(java.sql.Types.BIT, "BIT")); dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT")); dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT")); dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER")); dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT")); dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT")); dataTypes.add(new DataType(java.sql.Types.REAL, "REAL")); dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE")); dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC")); dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL")); dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR")); dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR")); dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR")); dataTypes.add(new DataType(java.sql.Types.DATE, "DATE")); dataTypes.add(new DataType(java.sql.Types.TIME, "TIME")); dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP")); dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY")); dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY")); dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY, "LONGVARBINARY")); dataTypes.add(new DataType(java.sql.Types.NULL, "NULL")); dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER")); dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB")); dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB")); DatabaseMetaData dbmd = con.getMetaData(); ResultSet rs = dbmd.getTypeInfo(); while (rs.next()) { int codeNumber = rs.getInt("DATA_TYPE"); String dbmsName = rs.getString("TYPE_NAME"); String createParams = rs.getString("CREATE_PARAMS"); if (codeNumber == Types.STRUCT && structName == null) structName = dbmsName;/*from w ww.j a v a 2s . c o m*/ else if (codeNumber == Types.DISTINCT && distinctName == null) distinctName = dbmsName; else if (codeNumber == Types.JAVA_OBJECT && javaName == null) javaName = dbmsName; else { for (int i = 0; i < dataTypes.size(); i++) { // find entry that matches the SQL code, // and if local type and params are not already set, // set them DataType type = (DataType) dataTypes.get(i); if (type.getCode() == codeNumber) { type.setLocalTypeAndParams(dbmsName, createParams); } } } } int[] types = { Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT }; rs = dbmd.getUDTs(null, "%", "%", types); while (rs.next()) { String typeName = null; DataType dataType = null; if (dbmd.isCatalogAtStart()) typeName = rs.getString(1) + dbmd.getCatalogSeparator() + rs.getString(2) + "." + rs.getString(3); else typeName = rs.getString(2) + "." + rs.getString(3) + dbmd.getCatalogSeparator() + rs.getString(1); switch (rs.getInt(5)) { case Types.STRUCT: dataType = new DataType(Types.STRUCT, typeName); dataType.setLocalTypeAndParams(structName, null); break; case Types.DISTINCT: dataType = new DataType(Types.DISTINCT, typeName); dataType.setLocalTypeAndParams(distinctName, null); break; case Types.JAVA_OBJECT: dataType = new DataType(Types.JAVA_OBJECT, typeName); dataType.setLocalTypeAndParams(javaName, null); break; } dataTypes.add(dataType); } return dataTypes; }
From source file:org.executequery.gui.resultset.ResultSetTableModel.java
public void createTable(ResultSet resultSet) { if (!isOpenAndValid(resultSet)) { clearData();//ww w. j av a 2 s . c o m return; } try { resetMetaData(); ResultSetMetaData rsmd = resultSet.getMetaData(); columnHeaders.clear(); visibleColumnHeaders.clear(); tableData.clear(); int zeroBaseIndex = 0; int count = rsmd.getColumnCount(); for (int i = 1; i <= count; i++) { zeroBaseIndex = i - 1; columnHeaders.add(new ResultSetColumnHeader(zeroBaseIndex, rsmd.getColumnLabel(i), rsmd.getColumnName(i), rsmd.getColumnType(i), rsmd.getColumnTypeName(i))); } int recordCount = 0; interrupted = false; if (holdMetaData) { setMetaDataVectors(rsmd); } List<RecordDataItem> rowData; long time = System.currentTimeMillis(); while (resultSet.next()) { if (interrupted || Thread.interrupted()) { throw new InterruptedException(); } recordCount++; rowData = new ArrayList<RecordDataItem>(count); for (int i = 1; i <= count; i++) { zeroBaseIndex = i - 1; ResultSetColumnHeader header = columnHeaders.get(zeroBaseIndex); RecordDataItem value = recordDataItemFactory.create(header); try { int dataType = header.getDataType(); switch (dataType) { // some drivers (informix for example) // was noticed to return the hashcode from // getObject for -1 data types (eg. longvarchar). // force string for these - others stick with // getObject() for default value formatting case Types.CHAR: case Types.VARCHAR: value.setValue(resultSet.getString(i)); break; case Types.DATE: value.setValue(resultSet.getDate(i)); break; case Types.TIME: value.setValue(resultSet.getTime(i)); break; case Types.TIMESTAMP: value.setValue(resultSet.getTimestamp(i)); break; case Types.LONGVARCHAR: case Types.CLOB: value.setValue(resultSet.getClob(i)); break; case Types.LONGVARBINARY: case Types.VARBINARY: case Types.BINARY: value.setValue(resultSet.getBytes(i)); break; case Types.BLOB: value.setValue(resultSet.getBlob(i)); break; case Types.BIT: case Types.TINYINT: case Types.SMALLINT: case Types.INTEGER: case Types.BIGINT: case Types.FLOAT: case Types.REAL: case Types.DOUBLE: case Types.NUMERIC: case Types.DECIMAL: case Types.NULL: case Types.OTHER: case Types.JAVA_OBJECT: case Types.DISTINCT: case Types.STRUCT: case Types.ARRAY: case Types.REF: case Types.DATALINK: case Types.BOOLEAN: case Types.ROWID: case Types.NCHAR: case Types.NVARCHAR: case Types.LONGNVARCHAR: case Types.NCLOB: case Types.SQLXML: // use getObject for all other known types value.setValue(resultSet.getObject(i)); break; default: // otherwise try as string asStringOrObject(value, resultSet, i); break; } } catch (Exception e) { try { // ... and on dump, resort to string value.setValue(resultSet.getString(i)); } catch (SQLException sqlException) { // catch-all SQLException - yes, this is hideous // noticed with invalid date formatted values in mysql value.setValue("<Error - " + sqlException.getMessage() + ">"); } } if (resultSet.wasNull()) { value.setNull(); } rowData.add(value); } tableData.add(rowData); if (recordCount == maxRecords) { break; } } if (Log.isTraceEnabled()) { Log.trace("Finished populating table model - " + recordCount + " rows - [ " + MiscUtils.formatDuration(System.currentTimeMillis() - time) + "]"); } fireTableStructureChanged(); } catch (SQLException e) { System.err.println("SQL error populating table model at: " + e.getMessage()); Log.debug("Table model error - " + e.getMessage(), e); } catch (Exception e) { if (e instanceof InterruptedException) { Log.debug("ResultSet generation interrupted.", e); } else { String message = e.getMessage(); if (StringUtils.isBlank(message)) { System.err.println("Exception populating table model."); } else { System.err.println("Exception populating table model at: " + message); } Log.debug("Table model error - ", e); } } finally { if (resultSet != null) { try { resultSet.close(); Statement statement = resultSet.getStatement(); if (statement != null) { statement.close(); } } catch (SQLException e) { } } } }
From source file:Main.java
private static Vector getDataTypes(Connection con) throws SQLException { String structName = null, distinctName = null, javaName = null; // create a vector of class DataType initialized with // the SQL code, the SQL type name, and two null entries // for the local type name and the creation parameter(s) Vector dataTypes = new Vector(); dataTypes.add(new DataType(java.sql.Types.BIT, "BIT")); dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT")); dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT")); dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER")); dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT")); dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT")); dataTypes.add(new DataType(java.sql.Types.REAL, "REAL")); dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE")); dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC")); dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL")); dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR")); dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR")); dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR")); dataTypes.add(new DataType(java.sql.Types.DATE, "DATE")); dataTypes.add(new DataType(java.sql.Types.TIME, "TIME")); dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP")); dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY")); dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY")); dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY, "LONGVARBINARY")); dataTypes.add(new DataType(java.sql.Types.NULL, "NULL")); dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER")); dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB")); dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB")); DatabaseMetaData dbmd = con.getMetaData(); ResultSet rs = dbmd.getTypeInfo(); while (rs.next()) { int codeNumber = rs.getInt("DATA_TYPE"); String dbmsName = rs.getString("TYPE_NAME"); String createParams = rs.getString("CREATE_PARAMS"); if (codeNumber == Types.STRUCT && structName == null) structName = dbmsName;//from w w w. j a va 2 s . c om else if (codeNumber == Types.DISTINCT && distinctName == null) distinctName = dbmsName; else if (codeNumber == Types.JAVA_OBJECT && javaName == null) javaName = dbmsName; else { for (int i = 0; i < dataTypes.size(); i++) { // find entry that matches the SQL code, // and if local type and params are not already set, // set them DataType type = (DataType) dataTypes.get(i); if (type.getCode() == codeNumber) { type.setLocalTypeAndParams(dbmsName, createParams); } } } } int[] types = { Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT }; rs = dbmd.getUDTs(null, "%", "%", types); while (rs.next()) { String typeName = null; DataType dataType = null; if (dbmd.isCatalogAtStart()) typeName = rs.getString(1) + dbmd.getCatalogSeparator() + rs.getString(2) + "." + rs.getString(3); else typeName = rs.getString(2) + "." + rs.getString(3) + dbmd.getCatalogSeparator() + rs.getString(1); switch (rs.getInt(5)) { case Types.STRUCT: dataType = new DataType(Types.STRUCT, typeName); dataType.setLocalTypeAndParams(structName, null); break; case Types.DISTINCT: dataType = new DataType(Types.DISTINCT, typeName); dataType.setLocalTypeAndParams(distinctName, null); break; case Types.JAVA_OBJECT: dataType = new DataType(Types.JAVA_OBJECT, typeName); dataType.setLocalTypeAndParams(javaName, null); break; } dataTypes.add(dataType); } return dataTypes; }
From source file:CreateNewType.java
private static Vector getDataTypes(Connection con, String typeToCreate) throws SQLException { String structName = null, distinctName = null, javaName = null; // create a vector of class DataType initialized with // the SQL code, the SQL type name, and two null entries // for the local type name and the creation parameter(s) Vector dataTypes = new Vector(); dataTypes.add(new DataType(java.sql.Types.BIT, "BIT")); dataTypes.add(new DataType(java.sql.Types.TINYINT, "TINYINT")); dataTypes.add(new DataType(java.sql.Types.SMALLINT, "SMALLINT")); dataTypes.add(new DataType(java.sql.Types.INTEGER, "INTEGER")); dataTypes.add(new DataType(java.sql.Types.BIGINT, "BIGINT")); dataTypes.add(new DataType(java.sql.Types.FLOAT, "FLOAT")); dataTypes.add(new DataType(java.sql.Types.REAL, "REAL")); dataTypes.add(new DataType(java.sql.Types.DOUBLE, "DOUBLE")); dataTypes.add(new DataType(java.sql.Types.NUMERIC, "NUMERIC")); dataTypes.add(new DataType(java.sql.Types.DECIMAL, "DECIMAL")); dataTypes.add(new DataType(java.sql.Types.CHAR, "CHAR")); dataTypes.add(new DataType(java.sql.Types.VARCHAR, "VARCHAR")); dataTypes.add(new DataType(java.sql.Types.LONGVARCHAR, "LONGVARCHAR")); dataTypes.add(new DataType(java.sql.Types.DATE, "DATE")); dataTypes.add(new DataType(java.sql.Types.TIME, "TIME")); dataTypes.add(new DataType(java.sql.Types.TIMESTAMP, "TIMESTAMP")); dataTypes.add(new DataType(java.sql.Types.BINARY, "BINARY")); dataTypes.add(new DataType(java.sql.Types.VARBINARY, "VARBINARY")); dataTypes.add(new DataType(java.sql.Types.LONGVARBINARY, "LONGVARBINARY")); dataTypes.add(new DataType(java.sql.Types.NULL, "NULL")); dataTypes.add(new DataType(java.sql.Types.OTHER, "OTHER")); dataTypes.add(new DataType(java.sql.Types.BLOB, "BLOB")); dataTypes.add(new DataType(java.sql.Types.CLOB, "CLOB")); DatabaseMetaData dbmd = con.getMetaData(); ResultSet rs = dbmd.getTypeInfo(); while (rs.next()) { int codeNumber = rs.getInt("DATA_TYPE"); String dbmsName = rs.getString("TYPE_NAME"); String createParams = rs.getString("CREATE_PARAMS"); if (codeNumber == Types.STRUCT && structName == null) structName = dbmsName;/*from w ww .j av a 2s. c o m*/ else if (codeNumber == Types.DISTINCT && distinctName == null) distinctName = dbmsName; else if (codeNumber == Types.JAVA_OBJECT && javaName == null) javaName = dbmsName; else { for (int i = 0; i < dataTypes.size(); i++) { // find entry that matches the SQL code, // and if local type and params are not already set, // set them DataType type = (DataType) dataTypes.get(i); if (type.getCode() == codeNumber) { type.setLocalTypeAndParams(dbmsName, createParams); } } } } if (typeToCreate.equals("s")) { int[] types = { Types.STRUCT, Types.DISTINCT, Types.JAVA_OBJECT }; rs = dbmd.getUDTs(null, "%", "%", types); while (rs.next()) { String typeName = null; DataType dataType = null; if (dbmd.isCatalogAtStart()) typeName = rs.getString(1) + dbmd.getCatalogSeparator() + rs.getString(2) + "." + rs.getString(3); else typeName = rs.getString(2) + "." + rs.getString(3) + dbmd.getCatalogSeparator() + rs.getString(1); switch (rs.getInt(5)) { case Types.STRUCT: dataType = new DataType(Types.STRUCT, typeName); dataType.setLocalTypeAndParams(structName, null); break; case Types.DISTINCT: dataType = new DataType(Types.DISTINCT, typeName); dataType.setLocalTypeAndParams(distinctName, null); break; case Types.JAVA_OBJECT: dataType = new DataType(Types.JAVA_OBJECT, typeName); dataType.setLocalTypeAndParams(javaName, null); break; } dataTypes.add(dataType); } } return dataTypes; }
From source file:org.apache.nifi.processors.standard.util.TestJdbcCommon.java
@Test public void testCreateSchemaTypes() throws SQLException, IllegalArgumentException, IllegalAccessException { final Set<Integer> fieldsToIgnore = new HashSet<>(); fieldsToIgnore.add(Types.NULL); fieldsToIgnore.add(Types.OTHER); final Field[] fieldTypes = Types.class.getFields(); for (final Field field : fieldTypes) { final Object fieldObject = field.get(null); final int type = (int) fieldObject; if (fieldsToIgnore.contains(Types.NULL)) { continue; }// w w w . jav a 2s.c o m final ResultSetMetaData metadata = mock(ResultSetMetaData.class); when(metadata.getColumnCount()).thenReturn(1); when(metadata.getColumnType(1)).thenReturn(type); when(metadata.getColumnName(1)).thenReturn(field.getName()); when(metadata.getTableName(1)).thenReturn("table"); final ResultSet rs = mock(ResultSet.class); when(rs.getMetaData()).thenReturn(metadata); try { JdbcCommon.createSchema(rs); } catch (final IllegalArgumentException | SQLException sqle) { sqle.printStackTrace(); Assert.fail("Failed when using type " + field.getName()); } } }
From source file:jp.co.tis.gsp.tools.dba.dialect.Dialect.java
/** * stmt???????//from w w w . j a va2s . c o m * @param stmt I/O * @param parameterIndex parameter index * @param value set value * @param sqlType sql type * @throws SQLException error */ public void setObjectInStmt(PreparedStatement stmt, int parameterIndex, String value, int sqlType) throws SQLException { if (sqlType == UN_USABLE_TYPE) { stmt.setNull(parameterIndex, Types.NULL); } else if (StringUtil.isBlank(value) || "".equals(value)) { stmt.setNull(parameterIndex, sqlType); } else { stmt.setObject(parameterIndex, value, sqlType); } }
From source file:org.jfree.data.jdbc.JDBCXYDataset.java
/** * ExecuteQuery will attempt execute the query passed to it against the * provided database connection. If connection is null then no action is * taken./*from ww w .j a va 2s . c o m*/ * * The results from the query are extracted and cached locally, thus * applying an upper limit on how many rows can be retrieved successfully. * * @param query the query to be executed. * @param con the connection the query is to be executed against. * * @throws SQLException if there is a problem executing the query. */ public void executeQuery(Connection con, String query) throws SQLException { if (con == null) { throw new SQLException("There is no database to execute the query."); } ResultSet resultSet = null; Statement statement = null; try { statement = con.createStatement(); resultSet = statement.executeQuery(query); ResultSetMetaData metaData = resultSet.getMetaData(); int numberOfColumns = metaData.getColumnCount(); int numberOfValidColumns = 0; int[] columnTypes = new int[numberOfColumns]; for (int column = 0; column < numberOfColumns; column++) { try { int type = metaData.getColumnType(column + 1); switch (type) { case Types.NUMERIC: case Types.REAL: case Types.INTEGER: case Types.DOUBLE: case Types.FLOAT: case Types.DECIMAL: case Types.BIT: case Types.DATE: case Types.TIME: case Types.TIMESTAMP: case Types.BIGINT: case Types.SMALLINT: ++numberOfValidColumns; columnTypes[column] = type; break; default: columnTypes[column] = Types.NULL; break; } } catch (SQLException e) { columnTypes[column] = Types.NULL; throw e; } } if (numberOfValidColumns <= 1) { throw new SQLException("Not enough valid columns where generated by query."); } /// First column is X data this.columnNames = new String[numberOfValidColumns - 1]; /// Get the column names and cache them. int currentColumn = 0; for (int column = 1; column < numberOfColumns; column++) { if (columnTypes[column] != Types.NULL) { this.columnNames[currentColumn] = metaData.getColumnLabel(column + 1); ++currentColumn; } } // Might need to add, to free memory from any previous result sets if (this.rows != null) { for (int column = 0; column < this.rows.size(); column++) { ArrayList row = (ArrayList) this.rows.get(column); row.clear(); } this.rows.clear(); } // Are we working with a time series. switch (columnTypes[0]) { case Types.DATE: case Types.TIME: case Types.TIMESTAMP: this.isTimeSeries = true; break; default: this.isTimeSeries = false; break; } // Get all rows. // rows = new ArrayList(); while (resultSet.next()) { ArrayList newRow = new ArrayList(); for (int column = 0; column < numberOfColumns; column++) { Object xObject = resultSet.getObject(column + 1); switch (columnTypes[column]) { case Types.NUMERIC: case Types.REAL: case Types.INTEGER: case Types.DOUBLE: case Types.FLOAT: case Types.DECIMAL: case Types.BIGINT: case Types.SMALLINT: newRow.add(xObject); break; case Types.DATE: case Types.TIME: case Types.TIMESTAMP: newRow.add(new Long(((Date) xObject).getTime())); break; case Types.NULL: break; default: System.err.println("Unknown data"); columnTypes[column] = Types.NULL; break; } } this.rows.add(newRow); } /// a kludge to make everything work when no rows returned if (this.rows.size() == 0) { ArrayList newRow = new ArrayList(); for (int column = 0; column < numberOfColumns; column++) { if (columnTypes[column] != Types.NULL) { newRow.add(new Integer(0)); } } this.rows.add(newRow); } /// Determine max and min values. if (this.rows.size() < 1) { this.maxValue = 0.0; this.minValue = 0.0; } else { ArrayList row = (ArrayList) this.rows.get(0); this.maxValue = Double.NEGATIVE_INFINITY; this.minValue = Double.POSITIVE_INFINITY; for (int rowNum = 0; rowNum < this.rows.size(); ++rowNum) { row = (ArrayList) this.rows.get(rowNum); for (int column = 1; column < numberOfColumns; column++) { Object testValue = row.get(column); if (testValue != null) { double test = ((Number) testValue).doubleValue(); if (test < this.minValue) { this.minValue = test; } if (test > this.maxValue) { this.maxValue = test; } } } } } fireDatasetChanged(new DatasetChangeInfo()); //TODO: fill in real change info } finally { if (resultSet != null) { try { resultSet.close(); } catch (Exception e) { // TODO: is this a good idea? } } if (statement != null) { try { statement.close(); } catch (Exception e) { // TODO: is this a good idea? } } } }
From source file:org.kontalk.system.Database.java
private static void setValue(PreparedStatement stat, int i, Object value) throws SQLException { if (value instanceof String) { stat.setString(i + 1, (String) value); } else if (value instanceof Integer) { stat.setInt(i + 1, (int) value); } else if (value instanceof Date) { stat.setLong(i + 1, ((Date) value).getTime()); } else if (value instanceof Boolean) { stat.setBoolean(i + 1, (boolean) value); } else if (value instanceof Enum) { stat.setInt(i + 1, ((Enum) value).ordinal()); } else if (value instanceof EnumSet) { stat.setInt(i + 1, EncodingUtils.enumSetToInt(((EnumSet) value))); } else if (value instanceof Optional) { Optional<?> o = (Optional) value; setValue(stat, i, o.orElse(null)); } else if (value == null) { stat.setNull(i + 1, Types.NULL); } else {//from w w w . j a va2 s. c o m LOGGER.warning("unknown type: " + value); } }
From source file:jp.co.tis.gsp.tools.dba.dialect.SqlserverDialect.java
@Override public void setObjectInStmt(PreparedStatement stmt, int parameterIndex, String value, int sqlType) throws SQLException { if (sqlType == UN_USABLE_TYPE) { stmt.setNull(parameterIndex, Types.NULL); } else if (StringUtil.isBlank(value) || "".equals(value)) { stmt.setNull(parameterIndex, sqlType); } else if (sqlType == Types.TIME) { stmt.setTimestamp(parameterIndex, Timestamp.valueOf("1970-01-01 " + value)); } else {//from ww w. j ava 2 s . co m stmt.setObject(parameterIndex, value, sqlType); } }
From source file:org.springframework.jdbc.core.StatementCreatorUtils.java
/** * Set the specified PreparedStatement parameter to null, * respecting database-specific peculiarities. */// w ww . ja va 2s. c o m private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, @Nullable String typeName) throws SQLException { if (sqlType == SqlTypeValue.TYPE_UNKNOWN || sqlType == Types.OTHER) { boolean useSetObject = false; Integer sqlTypeToUse = null; if (!shouldIgnoreGetParameterType) { try { sqlTypeToUse = ps.getParameterMetaData().getParameterType(paramIndex); } catch (SQLException ex) { if (logger.isDebugEnabled()) { logger.debug("JDBC getParameterType call failed - using fallback method instead: " + ex); } } } if (sqlTypeToUse == null) { // Proceed with database-specific checks sqlTypeToUse = Types.NULL; DatabaseMetaData dbmd = ps.getConnection().getMetaData(); String jdbcDriverName = dbmd.getDriverName(); String databaseProductName = dbmd.getDatabaseProductName(); if (databaseProductName.startsWith("Informix") || (jdbcDriverName.startsWith("Microsoft") && jdbcDriverName.contains("SQL Server"))) { // "Microsoft SQL Server JDBC Driver 3.0" versus "Microsoft JDBC Driver 4.0 for SQL Server" useSetObject = true; } else if (databaseProductName.startsWith("DB2") || jdbcDriverName.startsWith("jConnect") || jdbcDriverName.startsWith("SQLServer") || jdbcDriverName.startsWith("Apache Derby")) { sqlTypeToUse = Types.VARCHAR; } } if (useSetObject) { ps.setObject(paramIndex, null); } else { ps.setNull(paramIndex, sqlTypeToUse); } } else if (typeName != null) { ps.setNull(paramIndex, sqlType, typeName); } else { ps.setNull(paramIndex, sqlType); } }