Examples with BatchDmlExecutablePreparedStatement liquibase.statement.BatchDmlExecutablePreparedStatement used on opensource projects

Example 1 with BatchDmlExecutablePreparedStatement

use of liquibase.statement.BatchDmlExecutablePreparedStatement in project liquibase by liquibase.

the class LoadDataChange method generateStatements.

@Override
public SqlStatement[] generateStatements(Database database) {
    boolean databaseSupportsBatchUpdates = false;
    try {
        if (!(database instanceof MySQLDatabase)) {
            // mysql supports batch updates, but the performance vs. the big insert is worse
            databaseSupportsBatchUpdates = database.supportsBatchUpdates();
        }
    } catch (DatabaseException e) {
        throw new UnexpectedLiquibaseException(e);
    }
    CSVReader reader = null;
    try {
        reader = getCSVReader();
        if (reader == null) {
            throw new UnexpectedLiquibaseException("Unable to read file " + this.getFile());
        }
        String[] headers = reader.readNext();
        if (headers == null) {
            throw new UnexpectedLiquibaseException("Data file " + getFile() + " was empty");
        }
        // Make sure all take the column list we interpolated from the CSV headers
        addColumnsFromHeaders(headers);
        // If we have an real JDBC connection to the database, ask the database for any missing column types.
        try {
            retrieveMissingColumnLoadTypes(columns, database);
        } catch (DatabaseException e) {
            throw new UnexpectedLiquibaseException(e);
        }
        List<ExecutablePreparedStatementBase> preparedStatements = new ArrayList<>();
        boolean anyPreparedStatements = false;
        String[] line;
        // Start at '1' to take into account the header (already processed):
        int lineNumber = 1;
        boolean isCommentingEnabled = StringUtil.isNotEmpty(commentLineStartsWith);
        List<SqlStatement> statements = new ArrayList<>();
        while ((line = reader.readNext()) != null) {
            lineNumber++;
            if ((line.length == 0) || ((line.length == 1) && (StringUtil.trimToNull(line[0]) == null)) || (isCommentingEnabled && isLineCommented(line))) {
                // nothing interesting on this line
                continue;
            }
            // (Failure could indicate unquoted strings with commas, for example).
            if (line.length != headers.length) {
                throw new UnexpectedLiquibaseException("CSV file " + getFile() + " Line " + lineNumber + " has " + line.length + " values defined, Header has " + headers.length + ". Numbers MUST be equal (check for unquoted string with embedded commas)");
            }
            boolean needsPreparedStatement = false;
            List<LoadDataColumnConfig> columnsFromCsv = new ArrayList<>();
            for (int i = 0; i < headers.length; i++) {
                String value = line[i];
                String columnName = headers[i].trim();
                LoadDataColumnConfig valueConfig = new LoadDataColumnConfig();
                LoadDataColumnConfig columnConfig = getColumnConfig(i, columnName);
                if (columnConfig != null) {
                    if ("skip".equalsIgnoreCase(columnConfig.getType())) {
                        continue;
                    }
                    // don't overwrite header name unless there is actually a value to override it with
                    if (columnConfig.getName() != null) {
                        columnName = columnConfig.getName();
                    }
                    // 
                    if ("NULL".equalsIgnoreCase(value)) {
                        valueConfig.setType(columnConfig.getType());
                    }
                    valueConfig.setName(columnName);
                    valueConfig.setAllowUpdate(columnConfig.getAllowUpdate());
                    if (value.isEmpty()) {
                        value = columnConfig.getDefaultValue();
                    }
                    if (StringUtil.equalsWordNull(value)) {
                        valueConfig.setValue(null);
                    } else if (columnConfig.getType() == null) {
                        // columnConfig did not specify a type
                        valueConfig.setValue(value);
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.UNKNOWN) {
                        // columnConfig did not match a specific type
                        valueConfig.setValue(value);
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.BOOLEAN) {
                        if (value == null) {
                            // TODO getDefaultValueBoolean should use BooleanUtil.parseBoolean also for consistent behaviour
                            valueConfig.setValueBoolean(columnConfig.getDefaultValueBoolean());
                        } else {
                            valueConfig.setValueBoolean(BooleanUtil.parseBoolean(value));
                        }
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.NUMERIC) {
                        if (value != null) {
                            valueConfig.setValueNumeric(value);
                        } else {
                            valueConfig.setValueNumeric(columnConfig.getDefaultValueNumeric());
                        }
                    } else if (columnConfig.getType().toLowerCase().contains("date") || columnConfig.getType().toLowerCase().contains("time")) {
                        if ("NULL".equalsIgnoreCase(value) || "".equals(value)) {
                            valueConfig.setValue(null);
                        } else {
                            try {
                                // Need the column type for handling 'NOW' or 'TODAY' type column value
                                valueConfig.setType(columnConfig.getType());
                                if (value != null) {
                                    valueConfig.setValueDate(value);
                                } else {
                                    valueConfig.setValueDate(columnConfig.getDefaultValueDate());
                                }
                            } catch (DateParseException e) {
                                throw new UnexpectedLiquibaseException(e);
                            }
                        }
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.STRING) {
                        valueConfig.setType(columnConfig.getType());
                        valueConfig.setValue(value == null ? "" : value);
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.COMPUTED) {
                        if (null != value) {
                            liquibase.statement.DatabaseFunction function = new liquibase.statement.DatabaseFunction(value);
                            valueConfig.setValueComputed(function);
                        } else {
                            valueConfig.setValueComputed(columnConfig.getDefaultValueComputed());
                        }
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.SEQUENCE) {
                        if (value == null) {
                            throw new UnexpectedLiquibaseException("Must set a sequence name in the loadData column defaultValue attribute");
                        }
                        liquibase.statement.SequenceNextValueFunction function = new liquibase.statement.SequenceNextValueFunction(getSchemaName(), value);
                        valueConfig.setValueComputed(function);
                    } else if (columnConfig.getType().equalsIgnoreCase(LOAD_DATA_TYPE.BLOB.toString())) {
                        if ("NULL".equalsIgnoreCase(value)) {
                            valueConfig.setValue(null);
                        } else if (BASE64_PATTERN.matcher(value).matches()) {
                            valueConfig.setType(columnConfig.getType());
                            valueConfig.setValue(value);
                            needsPreparedStatement = true;
                        } else {
                            valueConfig.setValueBlobFile(value);
                            needsPreparedStatement = true;
                        }
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.CLOB) {
                        valueConfig.setValueClobFile(value);
                        needsPreparedStatement = true;
                    } else if (columnConfig.getTypeEnum() == LOAD_DATA_TYPE.UUID) {
                        valueConfig.setType(columnConfig.getType());
                        if ("NULL".equalsIgnoreCase(value)) {
                            valueConfig.setValue(null);
                        } else {
                            valueConfig.setValue(value);
                        }
                    } else if (columnConfig.getType().equalsIgnoreCase(LOAD_DATA_TYPE.OTHER.toString())) {
                        valueConfig.setType(columnConfig.getType());
                        if ("NULL".equalsIgnoreCase(value)) {
                            valueConfig.setValue(null);
                        } else {
                            valueConfig.setValue(value);
                        }
                    } else {
                        throw new UnexpectedLiquibaseException(String.format(coreBundle.getString("loaddata.type.is.not.supported"), columnConfig.getType()));
                    }
                } else {
                    // No columnConfig found. Assume header column name to be the table column name.
                    if (columnName.contains("(") || (columnName.contains(")") && (database instanceof AbstractJdbcDatabase))) {
                        columnName = ((AbstractJdbcDatabase) database).quoteObject(columnName, Column.class);
                    }
                    valueConfig.setName(columnName);
                    valueConfig.setValue(getValueToWrite(value));
                }
                columnsFromCsv.add(valueConfig);
            }
            // end of: iterate through all the columns of a CSV line
            // Try to use prepared statements if any of the following conditions apply:
            // 1. There is no other option than using a prepared statement (e.g. in cases of LOBs) regardless
            // of whether the 'usePreparedStatement' is set to false
            // 2. The database supports batched statements (for improved performance) AND we are not in an
            // "SQL" mode (i.e. we generate an SQL file instead of actually modifying the database).
            // BUT: if the user specifically requests usePreparedStatement=false, then respect that
            boolean actuallyUsePreparedStatements = false;
            if (hasPreparedStatementsImplemented()) {
                if (usePreparedStatements != null) {
                    if (!usePreparedStatements && needsPreparedStatement) {
                        throw new UnexpectedLiquibaseException("loadData is requesting usePreparedStatements=false but prepared statements are required");
                    }
                    actuallyUsePreparedStatements = usePreparedStatements;
                } else {
                    actuallyUsePreparedStatements = needsPreparedStatement || (databaseSupportsBatchUpdates && !isLoggingExecutor(database));
                }
            }
            if (actuallyUsePreparedStatements) {
                anyPreparedStatements = true;
                ExecutablePreparedStatementBase stmt = this.createPreparedStatement(database, getCatalogName(), getSchemaName(), getTableName(), columnsFromCsv, getChangeSet(), Scope.getCurrentScope().getResourceAccessor());
                preparedStatements.add(stmt);
            } else {
                InsertStatement insertStatement = this.createStatement(getCatalogName(), getSchemaName(), getTableName());
                for (LoadDataColumnConfig column : columnsFromCsv) {
                    String columnName = column.getName();
                    Object value = column.getValueObject();
                    if (value == null) {
                        value = "NULL";
                    }
                    insertStatement.addColumnValue(columnName, value);
                    if (insertStatement instanceof InsertOrUpdateStatement) {
                        ((InsertOrUpdateStatement) insertStatement).setAllowColumnUpdate(columnName, column.getAllowUpdate() == null || column.getAllowUpdate());
                    }
                }
                statements.add(insertStatement);
            }
        // end of: will we use a PreparedStatement?
        }
        if (anyPreparedStatements) {
            // If we have only prepared statements and the database supports batching, let's roll
            if (databaseSupportsBatchUpdates && statements.isEmpty() && (!preparedStatements.isEmpty())) {
                if (database instanceof PostgresDatabase) {
                    // we don't do batch updates for Postgres but we still send as a prepared statement, see LB-744
                    return preparedStatements.toArray(new SqlStatement[preparedStatements.size()]);
                } else {
                    return new SqlStatement[] { new BatchDmlExecutablePreparedStatement(database, getCatalogName(), getSchemaName(), getTableName(), columns, getChangeSet(), Scope.getCurrentScope().getResourceAccessor(), preparedStatements) };
                }
            } else {
                return statements.toArray(new SqlStatement[statements.size()]);
            }
        } else {
            if (statements.isEmpty()) {
                // avoid returning unnecessary dummy statement
                return new SqlStatement[0];
            }
            InsertSetStatement statementSet = this.createStatementSet(getCatalogName(), getSchemaName(), getTableName());
            for (SqlStatement stmt : statements) {
                statementSet.addInsertStatement((InsertStatement) stmt);
            }
            if ((database instanceof MSSQLDatabase) || (database instanceof MySQLDatabase) || (database instanceof PostgresDatabase)) {
                List<InsertStatement> innerStatements = statementSet.getStatements();
                if ((innerStatements != null) && (!innerStatements.isEmpty()) && (innerStatements.get(0) instanceof InsertOrUpdateStatement)) {
                    // cannot do insert or update in a single statement
                    return statementSet.getStatementsArray();
                }
                // should the need arise, on generation.
                return new SqlStatement[] { statementSet };
            } else {
                return statementSet.getStatementsArray();
            }
        }
    } catch (CsvMalformedLineException e) {
        throw new RuntimeException("Error parsing " + getRelativeTo() + " on line " + e.getLineNumber() + ": " + e.getMessage());
    } catch (IOException | LiquibaseException e) {
        throw new RuntimeException(e);
    } catch (UnexpectedLiquibaseException ule) {
        if ((getChangeSet() != null) && (getChangeSet().getFailOnError() != null) && !getChangeSet().getFailOnError()) {
            LOG.info("Change set " + getChangeSet().toString(false) + " failed, but failOnError was false.  Error: " + ule.getMessage());
            return new SqlStatement[0];
        } else {
            throw ule;
        }
    } finally {
        if (null != reader) {
            try {
                reader.close();
            } catch (Exception e) {
            // Do nothing
            }
        }
    }
}

Example 2 with BatchDmlExecutablePreparedStatement

use of liquibase.statement.BatchDmlExecutablePreparedStatement in project liquibase by liquibase.

the class LoadUpdateDataChange method generateRollbackStatements.

@Override
public SqlStatement[] generateRollbackStatements(Database database) throws RollbackImpossibleException {
    List<SqlStatement> statements = new ArrayList<>();
    List<SqlStatement> finalForwardList = new ArrayList<>();
    // If we are dealing with a batched UPDATE, "unroll" the individual statements first.
    for (SqlStatement thisForward : this.generateStatements(database)) {
        if (thisForward instanceof BatchDmlExecutablePreparedStatement) {
            finalForwardList.addAll(((BatchDmlExecutablePreparedStatement) thisForward).getIndividualStatements());
        } else {
            finalForwardList.add(thisForward);
        }
    }
    for (SqlStatement thisForward : finalForwardList) {
        InsertOrUpdateStatement thisInsert = (InsertOrUpdateStatement) thisForward;
        DeleteStatement delete = new DeleteStatement(getCatalogName(), getSchemaName(), getTableName());
        delete.setWhere(getWhere(thisInsert, database));
        statements.add(delete);
    }
    return statements.toArray(new SqlStatement[statements.size()]);
}