Examples with Constant org.h2.schema.Constant used on opensource projects

Example 11 with Constant

use of org.h2.schema.Constant in project h2database by h2database.

the class Function method optimize.

@Override
public Expression optimize(Session session) {
    boolean allConst = info.deterministic;
    for (int i = 0; i < args.length; i++) {
        Expression e = args[i];
        if (e == null) {
            continue;
        }
        e = e.optimize(session);
        args[i] = e;
        if (!e.isConstant()) {
            allConst = false;
        }
    }
    int t, s, d;
    long p;
    Expression p0 = args.length < 1 ? null : args[0];
    switch(info.type) {
        case IFNULL:
        case NULLIF:
        case COALESCE:
        case LEAST:
        case GREATEST:
            {
                t = Value.UNKNOWN;
                s = 0;
                p = 0;
                d = 0;
                for (Expression e : args) {
                    if (e != ValueExpression.getNull()) {
                        int type = e.getType();
                        if (type != Value.UNKNOWN && type != Value.NULL) {
                            t = Value.getHigherOrder(t, type);
                            s = Math.max(s, e.getScale());
                            p = Math.max(p, e.getPrecision());
                            d = Math.max(d, e.getDisplaySize());
                        }
                    }
                }
                if (t == Value.UNKNOWN) {
                    t = Value.STRING;
                    s = 0;
                    p = Integer.MAX_VALUE;
                    d = Integer.MAX_VALUE;
                }
                break;
            }
        case CASE:
        case DECODE:
            {
                t = Value.UNKNOWN;
                s = 0;
                p = 0;
                d = 0;
                // (expr, when, then, when, then, else)
                for (int i = 2, len = args.length; i < len; i += 2) {
                    Expression then = args[i];
                    if (then != ValueExpression.getNull()) {
                        int type = then.getType();
                        if (type != Value.UNKNOWN && type != Value.NULL) {
                            t = Value.getHigherOrder(t, type);
                            s = Math.max(s, then.getScale());
                            p = Math.max(p, then.getPrecision());
                            d = Math.max(d, then.getDisplaySize());
                        }
                    }
                }
                if (args.length % 2 == 0) {
                    Expression elsePart = args[args.length - 1];
                    if (elsePart != ValueExpression.getNull()) {
                        int type = elsePart.getType();
                        if (type != Value.UNKNOWN && type != Value.NULL) {
                            t = Value.getHigherOrder(t, type);
                            s = Math.max(s, elsePart.getScale());
                            p = Math.max(p, elsePart.getPrecision());
                            d = Math.max(d, elsePart.getDisplaySize());
                        }
                    }
                }
                if (t == Value.UNKNOWN) {
                    t = Value.STRING;
                    s = 0;
                    p = Integer.MAX_VALUE;
                    d = Integer.MAX_VALUE;
                }
                break;
            }
        case CASEWHEN:
            t = Value.getHigherOrder(args[1].getType(), args[2].getType());
            p = Math.max(args[1].getPrecision(), args[2].getPrecision());
            d = Math.max(args[1].getDisplaySize(), args[2].getDisplaySize());
            s = Math.max(args[1].getScale(), args[2].getScale());
            break;
        case NVL2:
            switch(args[1].getType()) {
                case Value.STRING:
                case Value.CLOB:
                case Value.STRING_FIXED:
                case Value.STRING_IGNORECASE:
                    t = args[1].getType();
                    break;
                default:
                    t = Value.getHigherOrder(args[1].getType(), args[2].getType());
                    break;
            }
            p = Math.max(args[1].getPrecision(), args[2].getPrecision());
            d = Math.max(args[1].getDisplaySize(), args[2].getDisplaySize());
            s = Math.max(args[1].getScale(), args[2].getScale());
            break;
        case CAST:
        case CONVERT:
        case TRUNCATE_VALUE:
            // data type, precision and scale is already set
            t = dataType;
            p = precision;
            s = scale;
            d = displaySize;
            break;
        case TRUNCATE:
            t = p0.getType();
            s = p0.getScale();
            p = p0.getPrecision();
            d = p0.getDisplaySize();
            if (t == Value.NULL) {
                t = Value.INT;
                p = ValueInt.PRECISION;
                d = ValueInt.DISPLAY_SIZE;
                s = 0;
            } else if (t == Value.TIMESTAMP) {
                t = Value.DATE;
                p = ValueDate.PRECISION;
                s = 0;
                d = ValueDate.PRECISION;
            }
            break;
        case ABS:
        case FLOOR:
        case ROUND:
            t = p0.getType();
            s = p0.getScale();
            p = p0.getPrecision();
            d = p0.getDisplaySize();
            if (t == Value.NULL) {
                t = Value.INT;
                p = ValueInt.PRECISION;
                d = ValueInt.DISPLAY_SIZE;
                s = 0;
            }
            break;
        case SET:
            {
                Expression p1 = args[1];
                t = p1.getType();
                p = p1.getPrecision();
                s = p1.getScale();
                d = p1.getDisplaySize();
                if (!(p0 instanceof Variable)) {
                    throw DbException.get(ErrorCode.CAN_ONLY_ASSIGN_TO_VARIABLE_1, p0.getSQL());
                }
                break;
            }
        case FILE_READ:
            {
                if (args.length == 1) {
                    t = Value.BLOB;
                } else {
                    t = Value.CLOB;
                }
                p = Integer.MAX_VALUE;
                s = 0;
                d = Integer.MAX_VALUE;
                break;
            }
        case SUBSTRING:
        case SUBSTR:
            {
                t = info.returnDataType;
                p = args[0].getPrecision();
                s = 0;
                if (args[1].isConstant()) {
                    // if only two arguments are used,
                    // subtract offset from first argument length
                    p -= args[1].getValue(session).getLong() - 1;
                }
                if (args.length == 3 && args[2].isConstant()) {
                    // if the third argument is constant it is at most this value
                    p = Math.min(p, args[2].getValue(session).getLong());
                }
                p = Math.max(0, p);
                d = MathUtils.convertLongToInt(p);
                break;
            }
        default:
            t = info.returnDataType;
            DataType type = DataType.getDataType(t);
            p = PRECISION_UNKNOWN;
            d = 0;
            s = type.defaultScale;
    }
    dataType = t;
    precision = p;
    scale = s;
    displaySize = d;
    if (allConst) {
        Value v = getValue(session);
        if (v == ValueNull.INSTANCE) {
            if (info.type == CAST || info.type == CONVERT) {
                return this;
            }
        }
        return ValueExpression.get(v);
    }
    return this;
}

Example 12 with Constant

use of org.h2.schema.Constant in project h2database by h2database.

the class Value method convertTo.

/**
 * Compare a value to the specified type.
 *
 * @param targetType the type of the returned value
 * @param precision the precision of the column to convert this value to.
 *        The special constant <code>-1</code> is used to indicate that
 *        the precision plays no role when converting the value
 * @param mode the conversion mode
 * @param column the column (if any), used for to improve the error message if conversion fails
 * @param enumerators the ENUM datatype enumerators (if any),
 *        for dealing with ENUM conversions
 * @return the converted value
 */
public Value convertTo(int targetType, int precision, Mode mode, Object column, String[] enumerators) {
    // converting BLOB to CLOB and vice versa is done in ValueLob
    if (getType() == targetType) {
        return this;
    }
    try {
        // decimal conversion
        switch(targetType) {
            case BOOLEAN:
                {
                    switch(getType()) {
                        case BYTE:
                        case SHORT:
                        case INT:
                        case LONG:
                        case DECIMAL:
                        case DOUBLE:
                        case FLOAT:
                            return ValueBoolean.get(getSignum() != 0);
                        case TIME:
                        case DATE:
                        case TIMESTAMP:
                        case TIMESTAMP_TZ:
                        case BYTES:
                        case JAVA_OBJECT:
                        case UUID:
                        case ENUM:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case BYTE:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueByte.get(getBoolean() ? (byte) 1 : (byte) 0);
                        case SHORT:
                        case ENUM:
                        case INT:
                            return ValueByte.get(convertToByte(getInt(), column));
                        case LONG:
                            return ValueByte.get(convertToByte(getLong(), column));
                        case DECIMAL:
                            return ValueByte.get(convertToByte(convertToLong(getBigDecimal(), column), column));
                        case DOUBLE:
                            return ValueByte.get(convertToByte(convertToLong(getDouble(), column), column));
                        case FLOAT:
                            return ValueByte.get(convertToByte(convertToLong(getFloat(), column), column));
                        case BYTES:
                            return ValueByte.get((byte) Integer.parseInt(getString(), 16));
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case SHORT:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueShort.get(getBoolean() ? (short) 1 : (short) 0);
                        case BYTE:
                            return ValueShort.get(getByte());
                        case ENUM:
                        case INT:
                            return ValueShort.get(convertToShort(getInt(), column));
                        case LONG:
                            return ValueShort.get(convertToShort(getLong(), column));
                        case DECIMAL:
                            return ValueShort.get(convertToShort(convertToLong(getBigDecimal(), column), column));
                        case DOUBLE:
                            return ValueShort.get(convertToShort(convertToLong(getDouble(), column), column));
                        case FLOAT:
                            return ValueShort.get(convertToShort(convertToLong(getFloat(), column), column));
                        case BYTES:
                            return ValueShort.get((short) Integer.parseInt(getString(), 16));
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case INT:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueInt.get(getBoolean() ? 1 : 0);
                        case BYTE:
                        case ENUM:
                        case SHORT:
                            return ValueInt.get(getInt());
                        case LONG:
                            return ValueInt.get(convertToInt(getLong(), column));
                        case DECIMAL:
                            return ValueInt.get(convertToInt(convertToLong(getBigDecimal(), column), column));
                        case DOUBLE:
                            return ValueInt.get(convertToInt(convertToLong(getDouble(), column), column));
                        case FLOAT:
                            return ValueInt.get(convertToInt(convertToLong(getFloat(), column), column));
                        case BYTES:
                            return ValueInt.get((int) Long.parseLong(getString(), 16));
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case LONG:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueLong.get(getBoolean() ? 1 : 0);
                        case BYTE:
                        case SHORT:
                        case ENUM:
                        case INT:
                            return ValueLong.get(getInt());
                        case DECIMAL:
                            return ValueLong.get(convertToLong(getBigDecimal(), column));
                        case DOUBLE:
                            return ValueLong.get(convertToLong(getDouble(), column));
                        case FLOAT:
                            return ValueLong.get(convertToLong(getFloat(), column));
                        case BYTES:
                            {
                                // parseLong doesn't work for ffffffffffffffff
                                byte[] d = getBytes();
                                if (d.length == 8) {
                                    return ValueLong.get(Bits.readLong(d, 0));
                                }
                                return ValueLong.get(Long.parseLong(getString(), 16));
                            }
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case DECIMAL:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueDecimal.get(BigDecimal.valueOf(getBoolean() ? 1 : 0));
                        case BYTE:
                        case SHORT:
                        case ENUM:
                        case INT:
                            return ValueDecimal.get(BigDecimal.valueOf(getInt()));
                        case LONG:
                            return ValueDecimal.get(BigDecimal.valueOf(getLong()));
                        case DOUBLE:
                            {
                                double d = getDouble();
                                if (Double.isInfinite(d) || Double.isNaN(d)) {
                                    throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, "" + d);
                                }
                                return ValueDecimal.get(BigDecimal.valueOf(d));
                            }
                        case FLOAT:
                            {
                                float f = getFloat();
                                if (Float.isInfinite(f) || Float.isNaN(f)) {
                                    throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, "" + f);
                                }
                                // better rounding behavior than BigDecimal.valueOf(f)
                                return ValueDecimal.get(new BigDecimal(Float.toString(f)));
                            }
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case DOUBLE:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueDouble.get(getBoolean() ? 1 : 0);
                        case BYTE:
                        case SHORT:
                        case INT:
                            return ValueDouble.get(getInt());
                        case LONG:
                            return ValueDouble.get(getLong());
                        case DECIMAL:
                            return ValueDouble.get(getBigDecimal().doubleValue());
                        case FLOAT:
                            return ValueDouble.get(getFloat());
                        case ENUM:
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case FLOAT:
                {
                    switch(getType()) {
                        case BOOLEAN:
                            return ValueFloat.get(getBoolean() ? 1 : 0);
                        case BYTE:
                        case SHORT:
                        case INT:
                            return ValueFloat.get(getInt());
                        case LONG:
                            return ValueFloat.get(getLong());
                        case DECIMAL:
                            return ValueFloat.get(getBigDecimal().floatValue());
                        case DOUBLE:
                            return ValueFloat.get((float) getDouble());
                        case ENUM:
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case DATE:
                {
                    switch(getType()) {
                        case TIME:
                            // this will be the result
                            return ValueDate.fromDateValue(DateTimeUtils.EPOCH_DATE_VALUE);
                        case TIMESTAMP:
                            return ValueDate.fromDateValue(((ValueTimestamp) this).getDateValue());
                        case TIMESTAMP_TZ:
                            {
                                ValueTimestampTimeZone ts = (ValueTimestampTimeZone) this;
                                long dateValue = ts.getDateValue(), timeNanos = ts.getTimeNanos();
                                long millis = DateTimeUtils.getMillis(dateValue, timeNanos, ts.getTimeZoneOffsetMins());
                                return ValueDate.fromMillis(millis);
                            }
                        case ENUM:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case TIME:
                {
                    switch(getType()) {
                        case DATE:
                            // has the time set to 0, the result will be 0
                            return ValueTime.fromNanos(0);
                        case TIMESTAMP:
                            return ValueTime.fromNanos(((ValueTimestamp) this).getTimeNanos());
                        case TIMESTAMP_TZ:
                            {
                                ValueTimestampTimeZone ts = (ValueTimestampTimeZone) this;
                                long dateValue = ts.getDateValue(), timeNanos = ts.getTimeNanos();
                                long millis = DateTimeUtils.getMillis(dateValue, timeNanos, ts.getTimeZoneOffsetMins());
                                return ValueTime.fromNanos(DateTimeUtils.nanosFromDate(millis) + timeNanos % 1_000_000);
                            }
                        case ENUM:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case TIMESTAMP:
                {
                    switch(getType()) {
                        case TIME:
                            return DateTimeUtils.normalizeTimestamp(0, ((ValueTime) this).getNanos());
                        case DATE:
                            return ValueTimestamp.fromDateValueAndNanos(((ValueDate) this).getDateValue(), 0);
                        case TIMESTAMP_TZ:
                            {
                                ValueTimestampTimeZone ts = (ValueTimestampTimeZone) this;
                                long dateValue = ts.getDateValue(), timeNanos = ts.getTimeNanos();
                                long millis = DateTimeUtils.getMillis(dateValue, timeNanos, ts.getTimeZoneOffsetMins());
                                return ValueTimestamp.fromMillisNanos(millis, (int) (timeNanos % 1_000_000));
                            }
                        case ENUM:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case TIMESTAMP_TZ:
                {
                    switch(getType()) {
                        case TIME:
                            {
                                ValueTimestamp ts = DateTimeUtils.normalizeTimestamp(0, ((ValueTime) this).getNanos());
                                return DateTimeUtils.timestampTimeZoneFromLocalDateValueAndNanos(ts.getDateValue(), ts.getTimeNanos());
                            }
                        case DATE:
                            return DateTimeUtils.timestampTimeZoneFromLocalDateValueAndNanos(((ValueDate) this).getDateValue(), 0);
                        case TIMESTAMP:
                            {
                                ValueTimestamp ts = (ValueTimestamp) this;
                                return DateTimeUtils.timestampTimeZoneFromLocalDateValueAndNanos(ts.getDateValue(), ts.getTimeNanos());
                            }
                        case ENUM:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case BYTES:
                {
                    switch(getType()) {
                        case JAVA_OBJECT:
                        case BLOB:
                            return ValueBytes.getNoCopy(getBytesNoCopy());
                        case UUID:
                        case GEOMETRY:
                            return ValueBytes.getNoCopy(getBytes());
                        case BYTE:
                            return ValueBytes.getNoCopy(new byte[] { getByte() });
                        case SHORT:
                            {
                                int x = getShort();
                                return ValueBytes.getNoCopy(new byte[] { (byte) (x >> 8), (byte) x });
                            }
                        case INT:
                            {
                                byte[] b = new byte[4];
                                Bits.writeInt(b, 0, getInt());
                                return ValueBytes.getNoCopy(b);
                            }
                        case LONG:
                            {
                                byte[] b = new byte[8];
                                Bits.writeLong(b, 0, getLong());
                                return ValueBytes.getNoCopy(b);
                            }
                        case ENUM:
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case JAVA_OBJECT:
                {
                    switch(getType()) {
                        case BYTES:
                        case BLOB:
                            return ValueJavaObject.getNoCopy(null, getBytesNoCopy(), getDataHandler());
                        case ENUM:
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case ENUM:
                {
                    switch(getType()) {
                        case BYTE:
                        case SHORT:
                        case INT:
                        case LONG:
                        case DECIMAL:
                            return ValueEnum.get(enumerators, getInt());
                        case STRING:
                        case STRING_IGNORECASE:
                        case STRING_FIXED:
                            return ValueEnum.get(enumerators, getString());
                        case JAVA_OBJECT:
                            Object object = JdbcUtils.deserialize(getBytesNoCopy(), getDataHandler());
                            if (object instanceof String) {
                                return ValueEnum.get(enumerators, (String) object);
                            } else if (object instanceof Integer) {
                                return ValueEnum.get(enumerators, (int) object);
                            }
                        // $FALL-THROUGH$
                        default:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                }
            case BLOB:
                {
                    switch(getType()) {
                        case BYTES:
                            return ValueLobDb.createSmallLob(Value.BLOB, getBytesNoCopy());
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case UUID:
                {
                    switch(getType()) {
                        case BYTES:
                            return ValueUuid.get(getBytesNoCopy());
                        case JAVA_OBJECT:
                            Object object = JdbcUtils.deserialize(getBytesNoCopy(), getDataHandler());
                            if (object instanceof java.util.UUID) {
                                return ValueUuid.get((java.util.UUID) object);
                            }
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
            case GEOMETRY:
                {
                    switch(getType()) {
                        case BYTES:
                            return ValueGeometry.get(getBytesNoCopy());
                        case JAVA_OBJECT:
                            Object object = JdbcUtils.deserialize(getBytesNoCopy(), getDataHandler());
                            if (DataType.isGeometry(object)) {
                                return ValueGeometry.getFromGeometry(object);
                            }
                        // $FALL-THROUGH$
                        case TIMESTAMP_TZ:
                            throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, getString());
                    }
                    break;
                }
        }
        // conversion by parsing the string value
        String s = getString();
        switch(targetType) {
            case NULL:
                return ValueNull.INSTANCE;
            case BOOLEAN:
                {
                    if (s.equalsIgnoreCase("true") || s.equalsIgnoreCase("t") || s.equalsIgnoreCase("yes") || s.equalsIgnoreCase("y")) {
                        return ValueBoolean.TRUE;
                    } else if (s.equalsIgnoreCase("false") || s.equalsIgnoreCase("f") || s.equalsIgnoreCase("no") || s.equalsIgnoreCase("n")) {
                        return ValueBoolean.FALSE;
                    } else {
                        // convert to a number, and if it is not 0 then it is true
                        return ValueBoolean.get(new BigDecimal(s).signum() != 0);
                    }
                }
            case BYTE:
                return ValueByte.get(Byte.parseByte(s.trim()));
            case SHORT:
                return ValueShort.get(Short.parseShort(s.trim()));
            case INT:
                return ValueInt.get(Integer.parseInt(s.trim()));
            case LONG:
                return ValueLong.get(Long.parseLong(s.trim()));
            case DECIMAL:
                return ValueDecimal.get(new BigDecimal(s.trim()));
            case TIME:
                return ValueTime.parse(s.trim());
            case DATE:
                return ValueDate.parse(s.trim());
            case TIMESTAMP:
                return ValueTimestamp.parse(s.trim(), mode);
            case TIMESTAMP_TZ:
                return ValueTimestampTimeZone.parse(s.trim());
            case BYTES:
                return ValueBytes.getNoCopy(StringUtils.convertHexToBytes(s.trim()));
            case JAVA_OBJECT:
                return ValueJavaObject.getNoCopy(null, StringUtils.convertHexToBytes(s.trim()), getDataHandler());
            case STRING:
                return ValueString.get(s);
            case STRING_IGNORECASE:
                return ValueStringIgnoreCase.get(s);
            case STRING_FIXED:
                return ValueStringFixed.get(s, precision, mode);
            case DOUBLE:
                return ValueDouble.get(Double.parseDouble(s.trim()));
            case FLOAT:
                return ValueFloat.get(Float.parseFloat(s.trim()));
            case CLOB:
                return ValueLobDb.createSmallLob(CLOB, s.getBytes(StandardCharsets.UTF_8));
            case BLOB:
                return ValueLobDb.createSmallLob(BLOB, StringUtils.convertHexToBytes(s.trim()));
            case ARRAY:
                return ValueArray.get(new Value[] { ValueString.get(s) });
            case RESULT_SET:
                {
                    SimpleResultSet rs = new SimpleResultSet();
                    rs.setAutoClose(false);
                    rs.addColumn("X", Types.VARCHAR, s.length(), 0);
                    rs.addRow(s);
                    return ValueResultSet.get(rs);
                }
            case UUID:
                return ValueUuid.get(s);
            case GEOMETRY:
                return ValueGeometry.get(s);
            default:
                if (JdbcUtils.customDataTypesHandler != null) {
                    return JdbcUtils.customDataTypesHandler.convert(this, targetType);
                }
                throw DbException.throwInternalError("type=" + targetType);
        }
    } catch (NumberFormatException e) {
        throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, e, getString());
    }
}

Example 13 with Constant

use of org.h2.schema.Constant in project h2database by h2database.

the class Schema method removeChildrenAndResources.

@Override
public void removeChildrenAndResources(Session session) {
    while (triggers != null && triggers.size() > 0) {
        TriggerObject obj = (TriggerObject) triggers.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    while (constraints != null && constraints.size() > 0) {
        Constraint obj = (Constraint) constraints.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    // There can be dependencies between tables e.g. using computed columns,
    // so we might need to loop over them multiple times.
    boolean runLoopAgain = false;
    do {
        runLoopAgain = false;
        if (tablesAndViews != null) {
            // Loop over a copy because the map is modified underneath us.
            for (Table obj : new ArrayList<>(tablesAndViews.values())) {
                // in one go underneath us.
                if (obj.getName() != null) {
                    if (database.getDependentTable(obj, obj) == null) {
                        database.removeSchemaObject(session, obj);
                    } else {
                        runLoopAgain = true;
                    }
                }
            }
        }
    } while (runLoopAgain);
    while (indexes != null && indexes.size() > 0) {
        Index obj = (Index) indexes.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    while (sequences != null && sequences.size() > 0) {
        Sequence obj = (Sequence) sequences.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    while (constants != null && constants.size() > 0) {
        Constant obj = (Constant) constants.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    while (functions != null && functions.size() > 0) {
        FunctionAlias obj = (FunctionAlias) functions.values().toArray()[0];
        database.removeSchemaObject(session, obj);
    }
    for (Right right : database.getAllRights()) {
        if (right.getGrantedObject() == this) {
            database.removeDatabaseObject(session, right);
        }
    }
    database.removeMeta(session, getId());
    owner = null;
    invalidate();
}

Example 14 with Constant

use of org.h2.schema.Constant in project h2database by h2database.

the class TestOptimizations method testConstantTypeConversionToColumnType.

private void testConstantTypeConversionToColumnType() throws SQLException {
    deleteDb("optimizations");
    Connection conn = getConnection("optimizations;IGNORECASE=TRUE");
    Statement stat = conn.createStatement();
    stat.executeUpdate("CREATE TABLE test (x int)");
    ResultSet resultSet;
    resultSet = stat.executeQuery("EXPLAIN SELECT x FROM test WHERE x = '5'");
    assertTrue(resultSet.next());
    // String constant '5' has been converted to int constant 5 on
    // optimization
    assertTrue(resultSet.getString(1).endsWith("X = 5"));
    stat.execute("drop table test");
    conn.close();
}