Examples with Expression expression.Expression used on opensource projects

Example 21 with Expression

use of expression.Expression in project ignite by apache.

the class DmlAstUtils method elementOrDefault.

/**
     * Do what we can to compute default value for this column (mimics H2 behavior).
     * @see Table#getDefaultValue
     * @see Column#validateConvertUpdateSequence
     * @param el SQL element.
     * @param col Column.
     * @return {@link GridSqlConst#NULL}, if {@code el} is null, or {@code el} if
     * it's not {@link GridSqlKeyword#DEFAULT}, or computed default value.
     */
private static GridSqlElement elementOrDefault(GridSqlElement el, GridSqlColumn col) {
    if (el == null)
        return GridSqlConst.NULL;
    if (el != GridSqlKeyword.DEFAULT)
        return el;
    Column h2Col = col.column();
    Expression dfltExpr = h2Col.getDefaultExpression();
    Value dfltVal;
    try {
        dfltVal = dfltExpr != null ? dfltExpr.getValue(null) : null;
    } catch (Exception ignored) {
        throw new IgniteSQLException("Failed to evaluate default value for a column " + col.columnName());
    }
    if (dfltVal != null)
        return new GridSqlConst(dfltVal);
    int type = h2Col.getType();
    DataType dt = DataType.getDataType(type);
    if (dt.decimal)
        dfltVal = ValueInt.get(0).convertTo(type);
    else if (dt.type == Value.TIMESTAMP)
        dfltVal = ValueTimestamp.fromMillis(U.currentTimeMillis());
    else if (dt.type == Value.TIME)
        dfltVal = ValueTime.fromNanos(0);
    else if (dt.type == Value.DATE)
        dfltVal = ValueDate.fromMillis(U.currentTimeMillis());
    else
        dfltVal = ValueString.get("").convertTo(type);
    return new GridSqlConst(dfltVal);
}

Example 22 with Expression

use of expression.Expression in project ignite by apache.

the class GridH2CollocationModel method joinedWithCollocated.

/**
     * @param f Filter.
     * @return Affinity join type.
     */
private Affinity joinedWithCollocated(int f) {
    TableFilter tf = childFilters[f];
    GridH2Table tbl = (GridH2Table) tf.getTable();
    if (validate) {
        if (tbl.rowDescriptor().context().customAffinityMapper())
            throw customAffinityError(tbl.cacheName());
        if (F.isEmpty(tf.getIndexConditions())) {
            throw new CacheException("Failed to prepare distributed join query: " + "join condition does not use index [joinedCache=" + tbl.cacheName() + ", plan=" + tf.getSelect().getPlanSQL() + ']');
        }
    }
    IndexColumn affCol = tbl.getAffinityKeyColumn();
    boolean affKeyCondFound = false;
    if (affCol != null) {
        ArrayList<IndexCondition> idxConditions = tf.getIndexConditions();
        int affColId = affCol.column.getColumnId();
        for (int i = 0; i < idxConditions.size(); i++) {
            IndexCondition c = idxConditions.get(i);
            int colId = c.getColumn().getColumnId();
            int cmpType = c.getCompareType();
            if ((cmpType == Comparison.EQUAL || cmpType == Comparison.EQUAL_NULL_SAFE) && (colId == affColId || tbl.rowDescriptor().isKeyColumn(colId)) && c.isEvaluatable()) {
                affKeyCondFound = true;
                Expression exp = c.getExpression();
                exp = exp.getNonAliasExpression();
                if (exp instanceof ExpressionColumn) {
                    ExpressionColumn expCol = (ExpressionColumn) exp;
                    // This is one of our previous joins.
                    TableFilter prevJoin = expCol.getTableFilter();
                    if (prevJoin != null) {
                        GridH2CollocationModel cm = child(indexOf(prevJoin), true);
                        // different affinity columns from different tables.
                        if (cm != null && !cm.view) {
                            Type t = cm.type(true);
                            if (t.isPartitioned() && t.isCollocated() && isAffinityColumn(prevJoin, expCol, validate))
                                return Affinity.COLLOCATED_JOIN;
                        }
                    }
                }
            }
        }
    }
    return affKeyCondFound ? Affinity.HAS_AFFINITY_CONDITION : Affinity.NONE;
}