Examples of org.lealone.dbobject.index.IndexCondition

org.lealone.dbobject.index.IndexCondition
A index condition object is made for each condition that can potentially use an index. This class does not extend expression, but in general there is one expression that maps to each index condition.

     */
    public void prepare() {
        // forget all unused index conditions
        // the indexConditions list may be modified here
        for (int i = 0; i < indexConditions.size(); i++) {
            IndexCondition condition = indexConditions.get(i);
            if (!condition.isAlwaysFalse()) {
                Column col = condition.getColumn();
                if (col.getColumnId() >= 0) {
                    if (index.getColumnIndex(col) < 0) {
                        indexConditions.remove(i);
                        i--;
                    }

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     * Remove all index conditions that are not used by the current index.
     */
    void removeUnusableIndexConditions() {
        // the indexConditions list may be modified here
        for (int i = 0; i < indexConditions.size(); i++) {
            IndexCondition cond = indexConditions.get(i);
            if (!cond.isEvaluatable()) {
                indexConditions.remove(i--);
            }
        }
    }

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    }


    public void createIndexConditions(Session session, TableFilter filter) {
        TableFilter tf = getTableFilter();
        if (filter == tf && column.getType() == Value.BOOLEAN) {
            IndexCondition cond = IndexCondition.get(Comparison.EQUAL, this, ValueExpression.get(ValueBoolean.get(true)));
            filter.addIndexCondition(cond);
        }
    }

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Related Classes of org.lealone.dbobject.index.IndexCondition

org.lealone.dbobject.table.TableFilter

org.lealone.expression.ExpressionColumn

org.lealone.util.StatementBuilder

org.lealone.value.CompareMode

org.lealone.value.Value

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