Examples with DelegateDatum org.apache.phoenix.schema.DelegateDatum used on opensource projects

Example 1 with DelegateDatum

use of org.apache.phoenix.schema.DelegateDatum in project phoenix by apache.

the class ExpressionCompiler method visitLeave.

@Override
public Expression visitLeave(ArrayConstructorNode node, List<Expression> children) throws SQLException {
    boolean isChildTypeUnknown = false;
    Expression arrayElemChild = null;
    PDataType arrayElemDataType = children.get(0).getDataType();
    for (int i = 0; i < children.size(); i++) {
        Expression child = children.get(i);
        PDataType childType = child.getDataType();
        if (childType == null) {
            isChildTypeUnknown = true;
        } else if (arrayElemDataType == null) {
            arrayElemDataType = childType;
            isChildTypeUnknown = true;
            arrayElemChild = child;
        } else if (arrayElemDataType == childType || childType.isCoercibleTo(arrayElemDataType)) {
            continue;
        } else if (arrayElemDataType.isCoercibleTo(childType)) {
            arrayElemChild = child;
            arrayElemDataType = childType;
        } else {
            throw new SQLExceptionInfo.Builder(SQLExceptionCode.TYPE_MISMATCH).setMessage("Case expressions must have common type: " + arrayElemDataType + " cannot be coerced to " + childType).build().buildException();
        }
    }
    // make the return type be the most general number type of DECIMAL.
    if (isChildTypeUnknown && arrayElemDataType != null && arrayElemDataType.isCoercibleTo(PDecimal.INSTANCE)) {
        arrayElemDataType = PDecimal.INSTANCE;
    }
    final PDataType theArrayElemDataType = arrayElemDataType;
    for (int i = 0; i < node.getChildren().size(); i++) {
        ParseNode childNode = node.getChildren().get(i);
        if (childNode instanceof BindParseNode) {
            context.getBindManager().addParamMetaData((BindParseNode) childNode, arrayElemDataType == arrayElemChild.getDataType() ? arrayElemChild : new DelegateDatum(arrayElemChild) {

                @Override
                public PDataType getDataType() {
                    return theArrayElemDataType;
                }
            });
        }
    }
    ImmutableBytesWritable ptr = context.getTempPtr();
    // the value object array type should match the java known type
    Object[] elements = (Object[]) java.lang.reflect.Array.newInstance(theArrayElemDataType.getJavaClass(), children.size());
    boolean rowKeyOrderOptimizable = context.getCurrentTable().getTable().rowKeyOrderOptimizable();
    ArrayConstructorExpression arrayExpression = new ArrayConstructorExpression(children, arrayElemDataType, rowKeyOrderOptimizable);
    if (ExpressionUtil.isConstant(arrayExpression)) {
        for (int i = 0; i < children.size(); i++) {
            Expression child = children.get(i);
            child.evaluate(null, ptr);
            Object value = null;
            if (child.getDataType() == null) {
                value = arrayElemDataType.toObject(ptr, theArrayElemDataType, child.getSortOrder());
            } else {
                value = arrayElemDataType.toObject(ptr, child.getDataType(), child.getSortOrder());
            }
            elements[i] = LiteralExpression.newConstant(value, theArrayElemDataType, child.getDeterminism()).getValue();
        }
        Object value = PArrayDataType.instantiatePhoenixArray(arrayElemDataType, elements);
        return LiteralExpression.newConstant(value, PDataType.fromTypeId(arrayElemDataType.getSqlType() + PDataType.ARRAY_TYPE_BASE), null, null, arrayExpression.getSortOrder(), Determinism.ALWAYS, rowKeyOrderOptimizable);
    }
    return wrapGroupByExpression(arrayExpression);
}