Examples with Database org.h2.engine.Database used on opensource projects

Example 51 with Database

use of org.h2.engine.Database in project h2database by h2database.

the class GeneratedKeys method getKeys.

/**
 * Returns generated keys.
 *
 * @param session
 *            session
 * @return local result with generated keys
 */
public LocalResult getKeys(Session session) {
    Database db = session == null ? null : session.getDatabase();
    if (Boolean.FALSE.equals(generatedKeysRequest)) {
        clear(null);
        return new LocalResult();
    }
    ArrayList<ExpressionColumn> expressionColumns;
    if (Boolean.TRUE.equals(generatedKeysRequest)) {
        expressionColumns = new ArrayList<>(allColumns.size());
        for (Column column : allColumns) {
            expressionColumns.add(new ExpressionColumn(db, column));
        }
    } else if (generatedKeysRequest instanceof int[]) {
        if (table != null) {
            int[] indices = (int[]) generatedKeysRequest;
            Column[] columns = table.getColumns();
            int cnt = columns.length;
            allColumns.clear();
            expressionColumns = new ArrayList<>(indices.length);
            for (int idx : indices) {
                if (idx >= 1 && idx <= cnt) {
                    Column column = columns[idx - 1];
                    expressionColumns.add(new ExpressionColumn(db, column));
                    allColumns.add(column);
                }
            }
        } else {
            clear(null);
            return new LocalResult();
        }
    } else if (generatedKeysRequest instanceof String[]) {
        if (table != null) {
            String[] names = (String[]) generatedKeysRequest;
            allColumns.clear();
            expressionColumns = new ArrayList<>(names.length);
            for (String name : names) {
                Column column;
                search: if (table.doesColumnExist(name)) {
                    column = table.getColumn(name);
                } else {
                    name = StringUtils.toUpperEnglish(name);
                    if (table.doesColumnExist(name)) {
                        column = table.getColumn(name);
                    } else {
                        for (Column c : table.getColumns()) {
                            if (c.getName().equalsIgnoreCase(name)) {
                                column = c;
                                break search;
                            }
                        }
                        continue;
                    }
                }
                expressionColumns.add(new ExpressionColumn(db, column));
                allColumns.add(column);
            }
        } else {
            clear(null);
            return new LocalResult();
        }
    } else {
        clear(null);
        return new LocalResult();
    }
    int columnCount = expressionColumns.size();
    if (columnCount == 0) {
        clear(null);
        return new LocalResult();
    }
    LocalResult result = new LocalResult(session, expressionColumns.toArray(new Expression[0]), columnCount);
    for (Map<Column, Value> map : data) {
        Value[] row = new Value[columnCount];
        for (Map.Entry<Column, Value> entry : map.entrySet()) {
            int idx = allColumns.indexOf(entry.getKey());
            if (idx >= 0) {
                row[idx] = entry.getValue();
            }
        }
        for (int i = 0; i < columnCount; i++) {
            if (row[i] == null) {
                row[i] = ValueNull.INSTANCE;
            }
        }
        result.addRow(row);
    }
    clear(null);
    return result;
}

Example 52 with Database

use of org.h2.engine.Database in project h2database by h2database.

the class CreateConstant method update.

@Override
public int update() {
    session.commit(true);
    session.getUser().checkAdmin();
    Database db = session.getDatabase();
    if (getSchema().findConstant(constantName) != null) {
        if (ifNotExists) {
            return 0;
        }
        throw DbException.get(ErrorCode.CONSTANT_ALREADY_EXISTS_1, constantName);
    }
    int id = getObjectId();
    Constant constant = new Constant(getSchema(), id, constantName);
    expression = expression.optimize(session);
    Value value = expression.getValue(session);
    constant.setValue(value);
    db.addSchemaObject(session, constant);
    return 0;
}

Example 53 with Database

use of org.h2.engine.Database in project h2database by h2database.

the class CreateSequence method update.

@Override
public int update() {
    session.commit(true);
    Database db = session.getDatabase();
    if (getSchema().findSequence(sequenceName) != null) {
        if (ifNotExists) {
            return 0;
        }
        throw DbException.get(ErrorCode.SEQUENCE_ALREADY_EXISTS_1, sequenceName);
    }
    int id = getObjectId();
    Long startValue = getLong(start);
    Long inc = getLong(increment);
    Long cache = getLong(cacheSize);
    Long min = getLong(minValue);
    Long max = getLong(maxValue);
    Sequence sequence = new Sequence(getSchema(), id, sequenceName, startValue, inc, cache, min, max, cycle, belongsToTable);
    db.addSchemaObject(session, sequence);
    return 0;
}

Example 54 with Database

use of org.h2.engine.Database in project h2database by h2database.

the class CreateSynonym method createTableSynonym.

private int createTableSynonym(Database db) {
    TableSynonym old = getSchema().getSynonym(data.synonymName);
    if (old != null) {
        if (orReplace) {
        // ok, we replacing the existing synonym
        } else if (ifNotExists) {
            return 0;
        } else {
            throw DbException.get(ErrorCode.TABLE_OR_VIEW_ALREADY_EXISTS_1, data.synonymName);
        }
    }
    TableSynonym table;
    if (old != null) {
        table = old;
        data.schema = table.getSchema();
        table.updateData(data);
        table.setComment(comment);
        table.setModified();
        db.updateMeta(session, table);
    } else {
        data.id = getObjectId();
        table = getSchema().createSynonym(data);
        table.setComment(comment);
        db.addSchemaObject(session, table);
    }
    table.updateSynonymFor();
    return 0;
}

Example 55 with Database

use of org.h2.engine.Database in project h2database by h2database.

the class CreateTable method update.

@Override
public int update() {
    if (!transactional) {
        session.commit(true);
    }
    Database db = session.getDatabase();
    if (!db.isPersistent()) {
        data.persistIndexes = false;
    }
    boolean isSessionTemporary = data.temporary && !data.globalTemporary;
    if (!isSessionTemporary) {
        db.lockMeta(session);
    }
    if (getSchema().resolveTableOrView(session, data.tableName) != null) {
        if (ifNotExists) {
            return 0;
        }
        throw DbException.get(ErrorCode.TABLE_OR_VIEW_ALREADY_EXISTS_1, data.tableName);
    }
    if (asQuery != null) {
        asQuery.prepare();
        if (data.columns.isEmpty()) {
            generateColumnsFromQuery();
        } else if (data.columns.size() != asQuery.getColumnCount()) {
            throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
        }
    }
    changePrimaryKeysToNotNull(data.columns);
    data.id = getObjectId();
    data.create = create;
    data.session = session;
    Table table = getSchema().createTable(data);
    ArrayList<Sequence> sequences = generateSequences(data.columns, data.temporary);
    table.setComment(comment);
    if (isSessionTemporary) {
        if (onCommitDrop) {
            table.setOnCommitDrop(true);
        }
        if (onCommitTruncate) {
            table.setOnCommitTruncate(true);
        }
        session.addLocalTempTable(table);
    } else {
        db.lockMeta(session);
        db.addSchemaObject(session, table);
    }
    try {
        for (Column c : data.columns) {
            c.prepareExpression(session);
        }
        for (Sequence sequence : sequences) {
            table.addSequence(sequence);
        }
        createConstraints();
        if (asQuery != null) {
            boolean old = session.isUndoLogEnabled();
            try {
                session.setUndoLogEnabled(false);
                session.startStatementWithinTransaction();
                Insert insert = new Insert(session);
                insert.setSortedInsertMode(sortedInsertMode);
                insert.setQuery(asQuery);
                insert.setTable(table);
                insert.setInsertFromSelect(true);
                insert.prepare();
                insert.update();
            } finally {
                session.setUndoLogEnabled(old);
            }
        }
        HashSet<DbObject> set = new HashSet<>();
        set.clear();
        table.addDependencies(set);
        for (DbObject obj : set) {
            if (obj == table) {
                continue;
            }
            if (obj.getType() == DbObject.TABLE_OR_VIEW) {
                if (obj instanceof Table) {
                    Table t = (Table) obj;
                    if (t.getId() > table.getId()) {
                        throw DbException.get(ErrorCode.FEATURE_NOT_SUPPORTED_1, "Table depends on another table " + "with a higher ID: " + t + ", this is currently not supported, " + "as it would prevent the database from " + "being re-opened");
                    }
                }
            }
        }
    } catch (DbException e) {
        db.checkPowerOff();
        db.removeSchemaObject(session, table);
        if (!transactional) {
            session.commit(true);
        }
        throw e;
    }
    return 0;
}