List of usage examples for java.sql ResultSetMetaData getPrecision
int getPrecision(int column) throws SQLException;
From source file:lasige.steeldb.jdbc.BFTRowSet.java
/** * Initializes the given <code>RowSetMetaData</code> object with the values * in the given <code>ResultSetMetaData</code> object. * * @param md the <code>RowSetMetaData</code> object for this * <code>CachedRowSetImpl</code> object, which will be set with * values from rsmd//from w ww . j ava 2s .com * @param rsmd the <code>ResultSetMetaData</code> object from which new * values for md will be read * @throws SQLException if an error occurs */ private void initMetaData(RowSetMetaDataImpl md, ResultSetMetaData rsmd) throws SQLException { int numCols = rsmd.getColumnCount(); md.setColumnCount(numCols); for (int col = 1; col <= numCols; col++) { md.setAutoIncrement(col, rsmd.isAutoIncrement(col)); if (rsmd.isAutoIncrement(col)) updateOnInsert = true; md.setCaseSensitive(col, false); md.setCurrency(col, false); md.setNullable(col, rsmd.isNullable(col)); md.setSigned(col, rsmd.isSigned(col)); md.setSearchable(col, false); /* * The PostgreSQL drivers sometimes return negative columnDisplaySize, * which causes an exception to be thrown. Check for it. */ int size = rsmd.getColumnDisplaySize(col); if (size < 0) { size = 0; } md.setColumnDisplaySize(col, 0); if (StringUtils.isNotBlank(rsmd.getColumnLabel(col))) { md.setColumnLabel(col, rsmd.getColumnLabel(col).toLowerCase()); } if (StringUtils.isNotBlank(rsmd.getColumnName(col))) { md.setColumnName(col, rsmd.getColumnName(col).toLowerCase()); } md.setSchemaName(col, null); /* * Drivers return some strange values for precision, for non-numeric data, including reports of * non-integer values; maybe we should check type, & set to 0 for non-numeric types. */ int precision = rsmd.getPrecision(col); if (precision < 0) { precision = 0; } md.setPrecision(col, 0); /* * It seems, from a bug report, that a driver can sometimes return a negative * value for scale. javax.sql.rowset.RowSetMetaDataImpl will throw an exception * if we attempt to set a negative value. As such, we'll check for this case. */ int scale = rsmd.getScale(col); if (scale < 0) { scale = 0; } md.setScale(col, 0); md.setTableName(col, null); md.setCatalogName(col, null); md.setColumnType(col, -1); md.setColumnTypeName(col, null); } if (conn != null) { // JDBC 4.0 mandates as does the Java EE spec that all DataBaseMetaData methods // must be implemented, therefore, the previous fix for 5055528 is being backed out dbmslocatorsUpdateCopy = conn.getMetaData().locatorsUpdateCopy(); } }
From source file:us.daveread.basicquery.BasicQuery.java
/** * Populates model with the query results. The query executed is the * currently selected query in the combo-box. * //from w w w . j av a 2 s.com * @param rawSqlStatement * The SQL statement to execute * @param model * The model to populate with the results * @param tripleFile * The location to write the results to as triples. */ private void execute(String rawSqlStatement, ListTableModel<Object> model, File tripleFile) { String sqlStatement = rawSqlStatement; Statement stmt = null; ResultSet result = null; ResultSetMetaData meta = null; List<Object> rowData = null; int retValue = 0; SQLWarning warning = null; int[] myType; Object value; String typeName; String colName; String metaName; boolean hasResults = false; boolean hasBLOB = false; Date connAsk = null; Date connGot = null; Date stmtGot = null; Date queryStart = null; Date queryReady = null; Date queryRSFetched = null; Date queryRSProcessed = null; long rows = 0; int cols = 0; boolean hasParams = false; final List<StatementParameter> allParams = new ArrayList<StatementParameter>(); List<Object> outParams = null; modeOfCurrentTable = whichModeValue(); mapOfCurrentTables = new HashMap<String, String>(); // Try to prevent incorrect selection of query type by checking // beginning of SQL statement for obvious stuff // First check "Select" and Describe query types if (!isOkayQueryType(getQuery().getSql())) { // If the query type is wrong, and the user doesn't override then // Get Out Of Here! return; } // If there were BLOB columns included in the last query the connection // will have been left open. Since we are executing a new query we // can close that old connection now. if (conn != null) { try { conn.close(); } catch (Throwable any) { if (LOGGER.isDebugEnabled()) { LOGGER.debug("Error (expected) closing connection", any); } } } conn = null; try { messageOut(Resources.getString("msgExecuteQuery", asQuery.isSelected() ? Resources.getString("msgQuery") : asDescribe.isSelected() ? Resources.getString("msgDescribe") : Resources.getString("msgUpdate"), sqlStatement), STYLE_BOLD); if (poolConnect.isSelected()) { messageOut(Resources.getString("msgPoolStats") + " ", STYLE_SUBTLE, false); if (getDBPool() != null) { messageOut(Resources.getString("msgPoolStatsCount", getDBPool().getNumActive() + "", getDBPool().getNumIdle() + "")); LOGGER.debug("Retrieved existing DB connection pool"); } else { LOGGER.debug("No existing DB pool"); messageOut(Resources.getString("msgPoolNone")); } } if (getDBPool() == null || /* conn == null */ !((String) connectString.getEditor().getItem()).equals(lastConnection) || !userId.getText().equals(lastUserId) || !new String(password.getPassword()).equals(lastPassword)) { removeDBPool(); lastConnection = (String) connectString.getEditor().getItem(); lastUserId = userId.getText(); lastPassword = new String(password.getPassword()); if (poolConnect.isSelected()) { setupDBPool(lastConnection, lastUserId, lastPassword); } messageOut(Resources.getString("msgConnCreated", lastConnection, lastUserId), STYLE_SUBTLE); } connAsk = new java.util.Date(); if (poolConnect.isSelected()) { conn = DriverManager.getConnection("jdbc:apache:commons:dbcp:" + DBPOOL_NAME); LOGGER.debug("Got pooled connection"); messageOut(Resources.getString("msgGotPoolConn"), STYLE_GREEN); } else { conn = DriverManager.getConnection(lastConnection, lastUserId, lastPassword); LOGGER.debug("Got non-pooled connection"); messageOut(Resources.getString("msgGotDirectConn"), STYLE_GREEN); } if (hasParams = sqlStatement.indexOf("$PARAM[") > -1) { sqlStatement = makeParams(sqlStatement, allParams); } connGot = new java.util.Date(); conn.setAutoCommit(autoCommit.isSelected()); conn.setReadOnly(readOnly.isSelected()); if (!hasParams) { stmt = conn.createStatement(); } else { stmt = conn.prepareCall(sqlStatement); setupCall((CallableStatement) stmt, allParams); } stmtGot = new java.util.Date(); try { if (!maxRows.getSelectedItem().equals(Resources.getString("proNoLimit"))) { stmt.setMaxRows(Integer.parseInt((String) maxRows.getSelectedItem())); messageOut("\n" + Resources.getString("msgMaxRows", stmt.getMaxRows() + ""), STYLE_SUBTLE); } } catch (Exception any) { LOGGER.warn("Unable to set maximum rows", any); messageOut(Resources.getString("errFailSetMaxRows", (String) maxRows.getSelectedItem(), any.getMessage()), STYLE_YELLOW); } if (asQuery.isSelected() || asDescribe.isSelected()) { queryStart = new java.util.Date(); if (!hasParams) { int updateCount; // Execute the query synchronously stmt.execute(sqlStatement); messageOut(Resources.getString("msgQueryExecutedByDB"), STYLE_GREEN); // Process the query results and/or report status if ((updateCount = stmt.getUpdateCount()) > -1) { do { LOGGER.debug("Looking for results [update=" + updateCount + "]"); stmt.getMoreResults(); } while ((updateCount = stmt.getUpdateCount()) > -1); } result = stmt.getResultSet(); } else { result = ((PreparedStatement) stmt).executeQuery(); } queryReady = new java.util.Date(); meta = result.getMetaData(); cols = meta.getColumnCount(); } else { queryStart = new java.util.Date(); if (!hasParams) { retValue = stmt.executeUpdate(sqlStatement); } else { retValue = ((PreparedStatement) stmt).executeUpdate(); } queryReady = new java.util.Date(); } if (asQuery.isSelected()) { for (int col = 0; col < cols; ++col) { colName = meta.getColumnName(col + 1); if (colName == null || colName.trim().length() == 0) { colName = Resources.getString("msgUnnamedColumn", meta.getColumnLabel(col + 1)); } if (configDisplayColumnDataType.isSelected()) { metaName = meta.getColumnTypeName(col + 1) + " " + meta.getColumnDisplaySize(col + 1) + " ("; // have had oracle tables report large precision values // for BLOB fields that caused exception to be thrown // by getPrecision() since the value was beyond int try { metaName += meta.getPrecision(col + 1); } catch (Exception any) { metaName += "?"; LOGGER.warn("Unable to get column precision", any); } metaName += "."; metaName += meta.getScale(col + 1); metaName += ")"; colName += " [" + metaName + "]"; } model.addColumn(colName); // Keep collection of tables used for Insert and Update Menu // Selections try { mapOfCurrentTables.put(meta.getTableName(col + 1), null); } catch (Exception any) { // Probably unimplemented method - Sybase driver LOGGER.warn("Failed to obtain table name from metadata", any); messageOut(Resources.getString("errFailReqTableName", any.getMessage()), STYLE_SUBTLE); } } rowData = new ArrayList<Object>(); myType = new int[cols]; for (int col = 0; col < cols; ++col) { typeName = meta.getColumnTypeName(col + 1).toUpperCase(); if (typeName.equals("NUMBER")) { if (meta.getScale(col + 1) > 0) { myType[col] = COLUMN_DATA_TYPE_DOUBLE; // DOUBLE } else if (meta.getPrecision(col + 1) <= MAX_DIGITS_FOR_INT) { myType[col] = COLUMN_DATA_TYPE_INT; // INTEGER } else { myType[col] = COLUMN_DATA_TYPE_LONG; // LONG } } else if (typeName.equals("LONG")) { myType[col] = COLUMN_DATA_TYPE_LONG; } else if (typeName.equals("DATETIME")) { myType[col] = COLUMN_DATA_TYPE_DATETIME; // Date/Time } else if (typeName.equals("DATE")) { myType[col] = COLUMN_DATA_TYPE_DATE; // Date/Time } else if (typeName.equals("BLOB")) { myType[col] = COLUMN_DATA_TYPE_BLOB; hasBLOB = true; } else { myType[col] = 0; // Default - String } } if (tripleFile != null) { try { final RdbToRdf exporter = new RdbToRdf(tripleFile.getAbsolutePath(), getQuery().getSql(), result); exporter.run(); rows = exporter.getLatestNumberOfRowsExported(); messageOut(""); messageOut(Resources.getString("msgEndExportToFile"), STYLE_BOLD); } catch (Throwable throwable) { messageOut(Resources.getString("errFailDataSave", throwable.toString()), STYLE_RED); LOGGER.error("Failed to save data to triples file: " + tripleFile.getAbsolutePath(), throwable); } } else if (fileLogResults.isSelected()) { writeDataAsCSV(sqlStatement, model, DBRESULTS_NAME, result, myType, false); } else { while (result.next()) { ++rows; rowData = new ArrayList<Object>(); for (int col = 0; col < cols; ++col) { value = getResultField(result, col + 1, myType[col]); rowData.add(value); } model.addRowFast(rowData); hasResults = true; } model.updateCompleted(); } queryRSProcessed = new java.util.Date(); } else if (asDescribe.isSelected()) { String colLabel; meta = result.getMetaData(); myType = new int[DESC_TABLE_COLUMN_COUNT]; for (int col = 0; col < DESC_TABLE_COLUMN_COUNT; ++col) { switch (col) { case DESC_TABLE_NAME_COLUMN: // Col Name colLabel = Resources.getString("proColumnName"); myType[col] = COLUMN_DATA_TYPE_STRING; break; case DESC_TABLE_TYPE_COLUMN: // Col Type colLabel = Resources.getString("proColumnType"); myType[col] = COLUMN_DATA_TYPE_STRING; break; case DESC_TABLE_LENGTH_COLUMN: // Col Length colLabel = Resources.getString("proColumnLength"); myType[col] = COLUMN_DATA_TYPE_INT; break; case DESC_TABLE_PRECISION_COLUMN: // Col precision colLabel = Resources.getString("proColPrecision"); myType[col] = COLUMN_DATA_TYPE_INT; break; case DESC_TABLE_SCALE_COLUMN: // Col scale colLabel = Resources.getString("proColScale"); myType[col] = COLUMN_DATA_TYPE_INT; break; case DESC_TABLE_NULLS_OK_COLUMN: // Nulls Okay? colLabel = Resources.getString("proColNullsAllowed"); myType[col] = COLUMN_DATA_TYPE_STRING; break; default: // oops colLabel = Resources.getString("proColUndefined"); break; } if (configDisplayColumnDataType.isSelected()) { colLabel += " ["; colLabel += myType[col] == 0 ? Resources.getString("proColCharType") : Resources.getString("proColNumeric"); colLabel += "]"; } model.addColumn(colLabel); } rowData = new ArrayList<Object>(); for (int col = 0; col < cols; ++col) { rowData = new ArrayList<Object>(); for (int row = 0; row < DESC_TABLE_COLUMN_COUNT; ++row) { switch (row) { case DESC_TABLE_NAME_COLUMN: // Name colName = meta.getColumnName(col + 1); if (colName == null || colName.trim().length() == 0) { colName = Resources.getString("msgUnnamedColumn", meta.getColumnLabel(col + 1)); } value = colName; break; case DESC_TABLE_TYPE_COLUMN: // Type value = meta.getColumnTypeName(col + 1) + " (" + meta.getColumnType(col + 1) + ")"; break; case DESC_TABLE_LENGTH_COLUMN: // Length value = new Integer(meta.getColumnDisplaySize(col + 1)); break; case DESC_TABLE_PRECISION_COLUMN: // Precision try { value = new Integer(meta.getPrecision(col + 1)); } catch (Exception any) { value = "?"; LOGGER.warn("Unable to obtain column precision", any); } break; case DESC_TABLE_SCALE_COLUMN: // Scale value = new Integer(meta.getScale(col + 1)); break; case DESC_TABLE_NULLS_OK_COLUMN: // Nulls Okay? value = meta.isNullable(col + 1) == ResultSetMetaData.columnNullable ? Resources.getString("proYes") : meta.isNullable(col + 1) == ResultSetMetaData.columnNoNulls ? Resources.getString("proNo") : Resources.getString("proUnknown"); break; default: value = null; break; } rowData.add(value); // Keep collection of tables used for Insert and Update Menu // Selections try { mapOfCurrentTables.put(meta.getTableName(col + 1), null); } catch (Exception any) { // Probably unimplemented method - Sybase driver LOGGER.warn("Failed to obtain table name from metadata", any); messageOut(Resources.getString("errFailReqTableName", any.getMessage()), STYLE_SUBTLE); } } model.addRow(rowData); } while (result.next()) { rows++; for (int col = 0; col < cols; ++col) { result.getObject(col + 1); } } queryRSFetched = new java.util.Date(); } else { messageOut("\n" + Resources.getString("msgReturnValue") + " " + retValue, STYLE_BOLD, false); rows = stmt.getUpdateCount(); } messageOut("\n" + Resources.getString("msgRows") + " ", STYLE_NORMAL, false); if (rows == stmt.getMaxRows() && rows > 0) { messageOut("" + rows, STYLE_YELLOW); } else { messageOut("" + rows, STYLE_BOLD); } messageOut(""); } catch (SQLException sql) { LOGGER.error("Error executing SQL", sql); messageOut(Resources.getString("errFailSQL", sql.getClass().getName(), sql.getMessage()), STYLE_RED); userMessage(Resources.getString("errFailSQLText", sql.getMessage()), Resources.getString("errFailSQLTitle"), JOptionPane.ERROR_MESSAGE); while ((sql = sql.getNextException()) != null) { LOGGER.error("Next Exception", sql); } modeOfCurrentTable = -1; } catch (Throwable any) { LOGGER.error("Error executing SQL", any); messageOut(Resources.getString("errFailSQL", any.getClass().getName(), any.getMessage()), STYLE_RED); userMessage(Resources.getString("errFailSQLText", any.getMessage()), Resources.getString("errFailSQLTitle"), JOptionPane.ERROR_MESSAGE); modeOfCurrentTable = -1; } finally { fileSaveBLOBs.setEnabled(hasBLOB); setExportAvailable((hasResults && model.getRowCount() > 0) || tripleFile != null); queryMakeInsert.setEnabled( modeOfCurrentTable == Query.MODE_DESCRIBE || modeOfCurrentTable == Query.MODE_QUERY); if (hasParams) { outParams = getOutParams((CallableStatement) stmt, allParams); } LOGGER.debug("Check for more results"); try { int resultCount = 0; while (stmt.getMoreResults()) { int updateCount; ++resultCount; updateCount = stmt.getUpdateCount(); LOGGER.debug("More results [" + resultCount + "][updateCount=" + updateCount + "]"); } } catch (SQLException sql) { LOGGER.error("Failed checking for more results", sql); messageOut(Resources.getString("errFailAddlResults", sql.getClass().getName(), sql.getMessage())); } LOGGER.debug("No more results"); if (result != null) { try { result.close(); LOGGER.info("Resultset closed"); } catch (Throwable any) { LOGGER.error("Unable to close resultset", any); } } if (stmt != null) { try { warning = stmt.getWarnings(); while (warning != null) { LOGGER.warn("Stmt Warning: " + warning.toString()); messageOut(Resources.getString("errStmtWarning", warning.toString()), STYLE_YELLOW); warning = warning.getNextWarning(); } } catch (Throwable any) { LOGGER.warn("Error retrieving statement SQL warnings", any); } try { stmt.close(); LOGGER.debug("Statement closed"); } catch (Throwable any) { LOGGER.error("Unable to close statement", any); } } if (conn != null) { try { warning = conn.getWarnings(); while (warning != null) { LOGGER.warn("Connt Warning: " + warning.toString()); messageOut(Resources.getString("errConnWarning", warning.toString()), STYLE_YELLOW); warning = warning.getNextWarning(); } } catch (Throwable any) { LOGGER.warn("Error retrieving connection SQL warnings", any); } } // Close the connection if there are no BLOBs. // If the user decides to save a BLOB we will need to DB connection // to remain open, hence we only close here if there are no BLOBs if (!hasBLOB && conn != null) { try { conn.close(); conn = null; LOGGER.debug("DB Connection closed"); } catch (Throwable any) { LOGGER.error("Unable to close DB connection", any); } } reportStats(sqlStatement, connAsk, connGot, stmtGot, queryStart, queryReady, queryRSFetched, queryRSProcessed, rows, cols, asDescribe.isSelected() ? model : null, outParams); // reportResults(SQL, model); } }