Examples with Constraint org.h2.constraint.Constraint used on opensource projects

Example 6 with Constraint

use of org.h2.constraint.Constraint in project h2database by h2database.

the class AlterTableDropConstraint method update.

@Override
public int update() {
    session.commit(true);
    Constraint constraint = getSchema().findConstraint(session, constraintName);
    if (constraint == null) {
        if (!ifExists) {
            throw DbException.get(ErrorCode.CONSTRAINT_NOT_FOUND_1, constraintName);
        }
    } else {
        session.getUser().checkRight(constraint.getTable(), Right.ALL);
        session.getUser().checkRight(constraint.getRefTable(), Right.ALL);
        session.getDatabase().removeSchemaObject(session, constraint);
    }
    return 0;
}

Example 7 with Constraint

use of org.h2.constraint.Constraint in project h2database by h2database.

the class AlterTableRenameColumn method update.

@Override
public int update() {
    session.commit(true);
    Database db = session.getDatabase();
    Table table = getSchema().findTableOrView(session, tableName);
    if (table == null) {
        if (ifTableExists) {
            return 0;
        }
        throw DbException.get(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, tableName);
    }
    Column column = table.getColumn(oldName);
    session.getUser().checkRight(table, Right.ALL);
    table.checkSupportAlter();
    // we need to update CHECK constraint
    // since it might reference the name of the column
    Expression newCheckExpr = column.getCheckConstraint(session, newName);
    table.renameColumn(column, newName);
    column.removeCheckConstraint();
    column.addCheckConstraint(session, newCheckExpr);
    table.setModified();
    db.updateMeta(session, table);
    for (DbObject child : table.getChildren()) {
        if (child.getCreateSQL() != null) {
            db.updateMeta(session, child);
        }
    }
    return 0;
}

Example 8 with Constraint

use of org.h2.constraint.Constraint in project h2database by h2database.

the class ScriptCommand method query.

@Override
public ResultInterface query(int maxrows) {
    session.getUser().checkAdmin();
    reset();
    Database db = session.getDatabase();
    if (schemaNames != null) {
        for (String schemaName : schemaNames) {
            Schema schema = db.findSchema(schemaName);
            if (schema == null) {
                throw DbException.get(ErrorCode.SCHEMA_NOT_FOUND_1, schemaName);
            }
        }
    }
    try {
        result = createResult();
        deleteStore();
        openOutput();
        if (out != null) {
            buffer = new byte[Constants.IO_BUFFER_SIZE];
        }
        if (settings) {
            for (Setting setting : db.getAllSettings()) {
                if (setting.getName().equals(SetTypes.getTypeName(SetTypes.CREATE_BUILD))) {
                    // (it is only set when creating the database)
                    continue;
                }
                add(setting.getCreateSQL(), false);
            }
        }
        if (out != null) {
            add("", true);
        }
        for (User user : db.getAllUsers()) {
            add(user.getCreateSQL(passwords), false);
        }
        for (Role role : db.getAllRoles()) {
            add(role.getCreateSQL(true), false);
        }
        for (Schema schema : db.getAllSchemas()) {
            if (excludeSchema(schema)) {
                continue;
            }
            add(schema.getCreateSQL(), false);
        }
        for (UserDataType datatype : db.getAllUserDataTypes()) {
            if (drop) {
                add(datatype.getDropSQL(), false);
            }
            add(datatype.getCreateSQL(), false);
        }
        for (SchemaObject obj : db.getAllSchemaObjects(DbObject.CONSTANT)) {
            if (excludeSchema(obj.getSchema())) {
                continue;
            }
            Constant constant = (Constant) obj;
            add(constant.getCreateSQL(), false);
        }
        final ArrayList<Table> tables = db.getAllTablesAndViews(false);
        // sort by id, so that views are after tables and views on views
        // after the base views
        Collections.sort(tables, new Comparator<Table>() {

            @Override
            public int compare(Table t1, Table t2) {
                return t1.getId() - t2.getId();
            }
        });
        // Generate the DROP XXX  ... IF EXISTS
        for (Table table : tables) {
            if (excludeSchema(table.getSchema())) {
                continue;
            }
            if (excludeTable(table)) {
                continue;
            }
            if (table.isHidden()) {
                continue;
            }
            table.lock(session, false, false);
            String sql = table.getCreateSQL();
            if (sql == null) {
                // null for metadata tables
                continue;
            }
            if (drop) {
                add(table.getDropSQL(), false);
            }
        }
        for (SchemaObject obj : db.getAllSchemaObjects(DbObject.FUNCTION_ALIAS)) {
            if (excludeSchema(obj.getSchema())) {
                continue;
            }
            if (drop) {
                add(obj.getDropSQL(), false);
            }
            add(obj.getCreateSQL(), false);
        }
        for (UserAggregate agg : db.getAllAggregates()) {
            if (drop) {
                add(agg.getDropSQL(), false);
            }
            add(agg.getCreateSQL(), false);
        }
        for (SchemaObject obj : db.getAllSchemaObjects(DbObject.SEQUENCE)) {
            if (excludeSchema(obj.getSchema())) {
                continue;
            }
            Sequence sequence = (Sequence) obj;
            if (drop) {
                add(sequence.getDropSQL(), false);
            }
            add(sequence.getCreateSQL(), false);
        }
        // Generate CREATE TABLE and INSERT...VALUES
        int count = 0;
        for (Table table : tables) {
            if (excludeSchema(table.getSchema())) {
                continue;
            }
            if (excludeTable(table)) {
                continue;
            }
            if (table.isHidden()) {
                continue;
            }
            table.lock(session, false, false);
            String createTableSql = table.getCreateSQL();
            if (createTableSql == null) {
                // null for metadata tables
                continue;
            }
            final TableType tableType = table.getTableType();
            add(createTableSql, false);
            final ArrayList<Constraint> constraints = table.getConstraints();
            if (constraints != null) {
                for (Constraint constraint : constraints) {
                    if (Constraint.Type.PRIMARY_KEY == constraint.getConstraintType()) {
                        add(constraint.getCreateSQLWithoutIndexes(), false);
                    }
                }
            }
            if (TableType.TABLE == tableType) {
                if (table.canGetRowCount()) {
                    String rowcount = "-- " + table.getRowCountApproximation() + " +/- SELECT COUNT(*) FROM " + table.getSQL();
                    add(rowcount, false);
                }
                if (data) {
                    count = generateInsertValues(count, table);
                }
            }
            final ArrayList<Index> indexes = table.getIndexes();
            for (int j = 0; indexes != null && j < indexes.size(); j++) {
                Index index = indexes.get(j);
                if (!index.getIndexType().getBelongsToConstraint()) {
                    add(index.getCreateSQL(), false);
                }
            }
        }
        if (tempLobTableCreated) {
            add("DROP TABLE IF EXISTS SYSTEM_LOB_STREAM", true);
            add("CALL SYSTEM_COMBINE_BLOB(-1)", true);
            add("DROP ALIAS IF EXISTS SYSTEM_COMBINE_CLOB", true);
            add("DROP ALIAS IF EXISTS SYSTEM_COMBINE_BLOB", true);
            tempLobTableCreated = false;
        }
        // Generate CREATE CONSTRAINT ...
        final ArrayList<SchemaObject> constraints = db.getAllSchemaObjects(DbObject.CONSTRAINT);
        Collections.sort(constraints, new Comparator<SchemaObject>() {

            @Override
            public int compare(SchemaObject c1, SchemaObject c2) {
                return ((Constraint) c1).compareTo((Constraint) c2);
            }
        });
        for (SchemaObject obj : constraints) {
            if (excludeSchema(obj.getSchema())) {
                continue;
            }
            Constraint constraint = (Constraint) obj;
            if (excludeTable(constraint.getTable())) {
                continue;
            }
            if (constraint.getTable().isHidden()) {
                continue;
            }
            if (Constraint.Type.PRIMARY_KEY != constraint.getConstraintType()) {
                add(constraint.getCreateSQLWithoutIndexes(), false);
            }
        }
        // Generate CREATE TRIGGER ...
        for (SchemaObject obj : db.getAllSchemaObjects(DbObject.TRIGGER)) {
            if (excludeSchema(obj.getSchema())) {
                continue;
            }
            TriggerObject trigger = (TriggerObject) obj;
            if (excludeTable(trigger.getTable())) {
                continue;
            }
            add(trigger.getCreateSQL(), false);
        }
        // Generate GRANT ...
        for (Right right : db.getAllRights()) {
            DbObject object = right.getGrantedObject();
            if (object != null) {
                if (object instanceof Schema) {
                    if (excludeSchema((Schema) object)) {
                        continue;
                    }
                } else if (object instanceof Table) {
                    Table table = (Table) object;
                    if (excludeSchema(table.getSchema())) {
                        continue;
                    }
                    if (excludeTable(table)) {
                        continue;
                    }
                }
            }
            add(right.getCreateSQL(), false);
        }
        // Generate COMMENT ON ...
        for (Comment comment : db.getAllComments()) {
            add(comment.getCreateSQL(), false);
        }
        if (out != null) {
            out.close();
        }
    } catch (IOException e) {
        throw DbException.convertIOException(e, getFileName());
    } finally {
        closeIO();
    }
    result.done();
    LocalResult r = result;
    reset();
    return r;
}

Example 9 with Constraint

use of org.h2.constraint.Constraint in project h2database by h2database.

the class Database method removeSchemaObject.

/**
 * Remove an object from the system table.
 *
 * @param session the session
 * @param obj the object to be removed
 */
public void removeSchemaObject(Session session, SchemaObject obj) {
    int type = obj.getType();
    if (type == DbObject.TABLE_OR_VIEW) {
        Table table = (Table) obj;
        if (table.isTemporary() && !table.isGlobalTemporary()) {
            session.removeLocalTempTable(table);
            return;
        }
    } else if (type == DbObject.INDEX) {
        Index index = (Index) obj;
        Table table = index.getTable();
        if (table.isTemporary() && !table.isGlobalTemporary()) {
            session.removeLocalTempTableIndex(index);
            return;
        }
    } else if (type == DbObject.CONSTRAINT) {
        Constraint constraint = (Constraint) obj;
        Table table = constraint.getTable();
        if (table.isTemporary() && !table.isGlobalTemporary()) {
            session.removeLocalTempTableConstraint(constraint);
            return;
        }
    }
    checkWritingAllowed();
    lockMeta(session);
    synchronized (this) {
        Comment comment = findComment(obj);
        if (comment != null) {
            removeDatabaseObject(session, comment);
        }
        obj.getSchema().remove(obj);
        int id = obj.getId();
        if (!starting) {
            Table t = getDependentTable(obj, null);
            if (t != null) {
                obj.getSchema().add(obj);
                throw DbException.get(ErrorCode.CANNOT_DROP_2, obj.getSQL(), t.getSQL());
            }
            obj.removeChildrenAndResources(session);
        }
        removeMeta(session, id);
    }
}

Example 10 with Constraint

use of org.h2.constraint.Constraint in project h2database by h2database.

the class DropTable method prepareDrop.

private void prepareDrop() {
    table = getSchema().findTableOrView(session, tableName);
    if (table == null) {
        if (!ifExists) {
            throw DbException.get(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, tableName);
        }
    } else {
        session.getUser().checkRight(table, Right.ALL);
        if (!table.canDrop()) {
            throw DbException.get(ErrorCode.CANNOT_DROP_TABLE_1, tableName);
        }
        if (dropAction == ConstraintActionType.RESTRICT) {
            StatementBuilder buff = new StatementBuilder();
            CopyOnWriteArrayList<TableView> dependentViews = table.getDependentViews();
            if (dependentViews != null && !dependentViews.isEmpty()) {
                for (TableView v : dependentViews) {
                    buff.appendExceptFirst(", ");
                    buff.append(v.getName());
                }
            }
            if (session.getDatabase().getSettings().standardDropTableRestrict) {
                final List<Constraint> constraints = table.getConstraints();
                if (constraints != null && !constraints.isEmpty()) {
                    for (Constraint c : constraints) {
                        if (c.getTable() != table) {
                            buff.appendExceptFirst(", ");
                            buff.append(c.getName());
                        }
                    }
                }
            }
            if (buff.length() > 0) {
                throw DbException.get(ErrorCode.CANNOT_DROP_2, tableName, buff.toString());
            }
        }
        table.lock(session, true, true);
    }
    if (next != null) {
        next.prepareDrop();
    }
}