Examples with Value com.wplatform.ddal.value.Value used on opensource projects

Example 11 with Value

use of com.wplatform.ddal.value.Value in project jdbc-shards by wplatform.

the class ExpressionColumn method getValue.

@Override
public Value getValue(Session session) {
    Select select = columnResolver.getSelect();
    if (select != null) {
        HashMap<Expression, Object> values = select.getCurrentGroup();
        if (values != null) {
            Value v = (Value) values.get(this);
            if (v != null) {
                return v;
            }
        }
    }
    Value value = columnResolver.getValue(column);
    if (value == null) {
        columnResolver.getValue(column);
        throw DbException.get(ErrorCode.MUST_GROUP_BY_COLUMN_1, getSQL());
    }
    return value;
}

Example 12 with Value

use of com.wplatform.ddal.value.Value in project jdbc-shards by wplatform.

the class AggregateDataHistogram method getValue.

@Override
Value getValue(Database database, int dataType, boolean distinct) {
    if (distinct) {
        count = 0;
        groupDistinct(database, dataType);
    }
    ValueArray[] values = new ValueArray[distinctValues.size()];
    int i = 0;
    for (Value dv : distinctValues.keys()) {
        AggregateDataHistogram d = distinctValues.get(dv);
        values[i] = ValueArray.get(new Value[] { dv, ValueLong.get(d.count) });
        i++;
    }
    final CompareMode compareMode = database.getCompareMode();
    Arrays.sort(values, new Comparator<ValueArray>() {

        @Override
        public int compare(ValueArray v1, ValueArray v2) {
            Value a1 = v1.getList()[0];
            Value a2 = v2.getList()[0];
            return a1.compareTo(a2, compareMode);
        }
    });
    Value v = ValueArray.get(values);
    return v.convertTo(dataType);
}

Example 13 with Value

use of com.wplatform.ddal.value.Value in project jdbc-shards by wplatform.

the class AggregateDataSelectivity method getValue.

@Override
Value getValue(Database database, int dataType, boolean distinct) {
    if (distinct) {
        count = 0;
    }
    Value v = null;
    int s = 0;
    if (count == 0) {
        s = 0;
    } else {
        m2 += distinctHashes.size();
        m2 = 100 * m2 / count;
        s = (int) m2;
        s = s <= 0 ? 1 : s > 100 ? 100 : s;
    }
    v = ValueInt.get(s);
    return v.convertTo(dataType);
}

Example 14 with Value

use of com.wplatform.ddal.value.Value in project jdbc-shards by wplatform.

the class Comparison method getValue.

@Override
public Value getValue(Session session) {
    Value l = left.getValue(session);
    if (right == null) {
        boolean result;
        switch(compareType) {
            case IS_NULL:
                result = l == ValueNull.INSTANCE;
                break;
            case IS_NOT_NULL:
                result = !(l == ValueNull.INSTANCE);
                break;
            default:
                throw DbException.throwInternalError("type=" + compareType);
        }
        return ValueBoolean.get(result);
    }
    if (l == ValueNull.INSTANCE) {
        if ((compareType & NULL_SAFE) == 0) {
            return ValueNull.INSTANCE;
        }
    }
    Value r = right.getValue(session);
    if (r == ValueNull.INSTANCE) {
        if ((compareType & NULL_SAFE) == 0) {
            return ValueNull.INSTANCE;
        }
    }
    int dataType = Value.getHigherOrder(left.getType(), right.getType());
    l = l.convertTo(dataType);
    r = r.convertTo(dataType);
    boolean result = compareNotNull(database, l, r, compareType);
    return ValueBoolean.get(result);
}

Example 15 with Value

use of com.wplatform.ddal.value.Value in project jdbc-shards by wplatform.

the class ConditionAndOr method getValue.

@Override
public Value getValue(Session session) {
    Value l = left.getValue(session);
    Value r;
    switch(andOrType) {
        case AND:
            {
                if (Boolean.FALSE.equals(l.getBoolean())) {
                    return l;
                }
                r = right.getValue(session);
                if (Boolean.FALSE.equals(r.getBoolean())) {
                    return r;
                }
                if (l == ValueNull.INSTANCE) {
                    return l;
                }
                if (r == ValueNull.INSTANCE) {
                    return r;
                }
                return ValueBoolean.get(true);
            }
        case OR:
            {
                if (Boolean.TRUE.equals(l.getBoolean())) {
                    return l;
                }
                r = right.getValue(session);
                if (Boolean.TRUE.equals(r.getBoolean())) {
                    return r;
                }
                if (l == ValueNull.INSTANCE) {
                    return l;
                }
                if (r == ValueNull.INSTANCE) {
                    return r;
                }
                return ValueBoolean.get(false);
            }
        default:
            throw DbException.throwInternalError("type=" + andOrType);
    }
}