Examples with ConditionInConstantSet org.h2.expression.ConditionInConstantSet used on opensource projects

Example 1 with ConditionInConstantSet

use of org.h2.expression.ConditionInConstantSet in project h2database by h2database.

the class ConditionAndOr method optimize.

@Override
public Expression optimize(Session session) {
    // NULL handling: see wikipedia,
    // http://www-cs-students.stanford.edu/~wlam/compsci/sqlnulls
    left = left.optimize(session);
    right = right.optimize(session);
    int lc = left.getCost(), rc = right.getCost();
    if (rc < lc) {
        Expression t = left;
        left = right;
        right = t;
    }
    // SELECT * FROM TEST WHERE NOT (B=A AND B=0 AND A=0); // 1, NULL
    if (session.getDatabase().getSettings().optimizeTwoEquals && andOrType == AND) {
        // try to add conditions (A=B AND B=1: add A=1)
        if (left instanceof Comparison && right instanceof Comparison) {
            Comparison compLeft = (Comparison) left;
            Comparison compRight = (Comparison) right;
            Expression added = compLeft.getAdditional(session, compRight, true);
            if (added != null) {
                added = added.optimize(session);
                return new ConditionAndOr(AND, this, added);
            }
        }
    }
    // (A=1 AND (B=2 OR B=3))
    if (andOrType == OR && session.getDatabase().getSettings().optimizeOr) {
        // try to add conditions (A=B AND B=1: add A=1)
        if (left instanceof Comparison && right instanceof Comparison) {
            Comparison compLeft = (Comparison) left;
            Comparison compRight = (Comparison) right;
            Expression added = compLeft.getAdditional(session, compRight, false);
            if (added != null) {
                return added.optimize(session);
            }
        } else if (left instanceof ConditionIn && right instanceof Comparison) {
            Expression added = ((ConditionIn) left).getAdditional((Comparison) right);
            if (added != null) {
                return added.optimize(session);
            }
        } else if (right instanceof ConditionIn && left instanceof Comparison) {
            Expression added = ((ConditionIn) right).getAdditional((Comparison) left);
            if (added != null) {
                return added.optimize(session);
            }
        } else if (left instanceof ConditionInConstantSet && right instanceof Comparison) {
            Expression added = ((ConditionInConstantSet) left).getAdditional(session, (Comparison) right);
            if (added != null) {
                return added.optimize(session);
            }
        } else if (right instanceof ConditionInConstantSet && left instanceof Comparison) {
            Expression added = ((ConditionInConstantSet) right).getAdditional(session, (Comparison) left);
            if (added != null) {
                return added.optimize(session);
            }
        }
    }
    // TODO optimization: convert .. OR .. to UNION if the cost is lower
    Value l = left.isConstant() ? left.getValue(session) : null;
    Value r = right.isConstant() ? right.getValue(session) : null;
    if (l == null && r == null) {
        return this;
    }
    if (l != null && r != null) {
        return ValueExpression.get(getValue(session));
    }
    switch(andOrType) {
        case AND:
            if (l != null) {
                if (l != ValueNull.INSTANCE && !l.getBoolean()) {
                    return ValueExpression.get(l);
                } else if (l.getBoolean()) {
                    return right;
                }
            } else if (r != null) {
                if (r != ValueNull.INSTANCE && !r.getBoolean()) {
                    return ValueExpression.get(r);
                } else if (r.getBoolean()) {
                    return left;
                }
            }
            break;
        case OR:
            if (l != null) {
                if (l.getBoolean()) {
                    return ValueExpression.get(l);
                } else if (l != ValueNull.INSTANCE) {
                    return right;
                }
            } else if (r != null) {
                if (r.getBoolean()) {
                    return ValueExpression.get(r);
                } else if (r != ValueNull.INSTANCE) {
                    return left;
                }
            }
            break;
        default:
            DbException.throwInternalError("type=" + andOrType);
    }
    return this;
}

Example 2 with ConditionInConstantSet

use of org.h2.expression.ConditionInConstantSet in project ignite by apache.

the class GridSqlQueryParser method parseExpression0.

/**
 * @param expression Expression.
 * @param calcTypes Calculate types for all the expressions.
 * @return Parsed expression.
 */
private GridSqlElement parseExpression0(Expression expression, boolean calcTypes) {
    if (expression instanceof ExpressionColumn) {
        ExpressionColumn expCol = (ExpressionColumn) expression;
        return new GridSqlColumn(expCol.getColumn(), parseTableFilter(expCol.getTableFilter()), SCHEMA_NAME.get(expCol), expCol.getOriginalTableAliasName(), expCol.getColumnName());
    }
    if (expression instanceof Alias)
        return new GridSqlAlias(expression.getAlias(), parseExpression(expression.getNonAliasExpression(), calcTypes), true);
    if (expression instanceof ValueExpression)
        // == comparison is legit, see ValueExpression#getSQL()
        return expression == ValueExpression.getDefault() ? GridSqlKeyword.DEFAULT : new GridSqlConst(expression.getValue(null));
    if (expression instanceof Operation) {
        Operation operation = (Operation) expression;
        Operation.OpType type = OPERATION_TYPE.get(operation);
        if (type == Operation.OpType.NEGATE) {
            assert OPERATION_RIGHT.get(operation) == null;
            return new GridSqlOperation(GridSqlOperationType.NEGATE, parseExpression(OPERATION_LEFT.get(operation), calcTypes));
        }
        return new GridSqlOperation(mapOperationType(type), parseExpression(OPERATION_LEFT.get(operation), calcTypes), parseExpression(OPERATION_RIGHT.get(operation), calcTypes));
    }
    if (expression instanceof Comparison) {
        Comparison cmp = (Comparison) expression;
        GridSqlOperationType opType = COMPARISON_TYPES[COMPARISON_TYPE.get(cmp)];
        assert opType != null : COMPARISON_TYPE.get(cmp);
        Expression leftExp = COMPARISON_LEFT.get(cmp);
        GridSqlElement left = parseExpression(leftExp, calcTypes);
        if (opType.childrenCount() == 1)
            return new GridSqlOperation(opType, left);
        Expression rightExp = COMPARISON_RIGHT.get(cmp);
        GridSqlElement right = parseExpression(rightExp, calcTypes);
        return new GridSqlOperation(opType, left, right);
    }
    if (expression instanceof ConditionNot)
        return new GridSqlOperation(NOT, parseExpression(expression.getNotIfPossible(null), calcTypes));
    if (expression instanceof ConditionAndOr) {
        ConditionAndOr andOr = (ConditionAndOr) expression;
        int type = ANDOR_TYPE.get(andOr);
        assert type == ConditionAndOr.AND || type == ConditionAndOr.OR;
        return new GridSqlOperation(type == ConditionAndOr.AND ? AND : OR, parseExpression(ANDOR_LEFT.get(andOr), calcTypes), parseExpression(ANDOR_RIGHT.get(andOr), calcTypes));
    }
    if (expression instanceof Subquery) {
        Query qry = ((Subquery) expression).getQuery();
        return parseQueryExpression(qry);
    }
    if (expression instanceof ConditionIn) {
        GridSqlOperation res = new GridSqlOperation(IN);
        res.addChild(parseExpression(LEFT_CI.get((ConditionIn) expression), calcTypes));
        List<Expression> vals = VALUE_LIST_CI.get((ConditionIn) expression);
        for (Expression val : vals) res.addChild(parseExpression(val, calcTypes));
        return res;
    }
    if (expression instanceof ConditionInConstantSet) {
        GridSqlOperation res = new GridSqlOperation(IN);
        res.addChild(parseExpression(LEFT_CICS.get((ConditionInConstantSet) expression), calcTypes));
        List<Expression> vals = VALUE_LIST_CICS.get((ConditionInConstantSet) expression);
        for (Expression val : vals) res.addChild(parseExpression(val, calcTypes));
        return res;
    }
    if (expression instanceof ConditionInSelect) {
        GridSqlOperation res = new GridSqlOperation(IN);
        boolean all = ALL.get((ConditionInSelect) expression);
        int compareType = COMPARE_TYPE.get((ConditionInSelect) expression);
        assert0(!all, expression);
        assert0(compareType == Comparison.EQUAL, expression);
        res.addChild(parseExpression(LEFT_CIS.get((ConditionInSelect) expression), calcTypes));
        Query qry = QUERY_IN.get((ConditionInSelect) expression);
        res.addChild(parseQueryExpression(qry));
        return res;
    }
    if (expression instanceof CompareLike) {
        assert0(ESCAPE.get((CompareLike) expression) == null, expression);
        boolean regexp = REGEXP_CL.get((CompareLike) expression);
        return new GridSqlOperation(regexp ? REGEXP : LIKE, parseExpression(LEFT.get((CompareLike) expression), calcTypes), parseExpression(RIGHT.get((CompareLike) expression), calcTypes));
    }
    if (expression instanceof Function) {
        Function f = (Function) expression;
        GridSqlFunction res = new GridSqlFunction(null, f.getName());
        if (f.getArgs() != null) {
            if (f.getFunctionType() == Function.TABLE || f.getFunctionType() == Function.TABLE_DISTINCT) {
                Column[] cols = FUNC_TBL_COLS.get((TableFunction) f);
                Expression[] args = f.getArgs();
                assert cols.length == args.length;
                for (int i = 0; i < cols.length; i++) {
                    GridSqlElement arg = parseExpression(args[i], calcTypes);
                    GridSqlAlias alias = new GridSqlAlias(cols[i].getName(), arg, false);
                    alias.resultType(fromColumn(cols[i]));
                    res.addChild(alias);
                }
            } else {
                for (Expression arg : f.getArgs()) {
                    if (arg == null) {
                        if (f.getFunctionType() != Function.CASE)
                            throw new IllegalStateException("Function type with null arg: " + f.getFunctionType());
                        res.addChild(GridSqlPlaceholder.EMPTY);
                    } else
                        res.addChild(parseExpression(arg, calcTypes));
                }
            }
        }
        if (f.getFunctionType() == Function.CAST || f.getFunctionType() == Function.CONVERT) {
            checkTypeSupported(f.getType(), "[expSql=" + f.getSQL() + ']');
            res.resultType(fromExpression(f));
        }
        return res;
    }
    if (expression instanceof JavaFunction) {
        JavaFunction f = (JavaFunction) expression;
        FunctionAlias alias = FUNC_ALIAS.get(f);
        GridSqlFunction res = new GridSqlFunction(alias.getSchema().getName(), f.getName());
        if (f.getArgs() != null) {
            for (Expression arg : f.getArgs()) res.addChild(parseExpression(arg, calcTypes));
        }
        return res;
    }
    if (expression instanceof Parameter)
        return new GridSqlParameter(((Parameter) expression).getIndex());
    if (expression instanceof Aggregate) {
        Aggregate.AggregateType type = TYPE.get((Aggregate) expression);
        if (GridSqlAggregateFunction.isValidType(type)) {
            GridSqlAggregateFunction res = new GridSqlAggregateFunction(DISTINCT.get((Aggregate) expression), type);
            Expression on = ON.get((Aggregate) expression);
            if (on != null)
                res.addChild(parseExpression(on, calcTypes));
            ArrayList<SelectOrderBy> orders = GROUP_CONCAT_ORDER_LIST.get((Aggregate) expression);
            if (!F.isEmpty(orders))
                parseGroupConcatOrder(res, orders, calcTypes);
            Expression separator = GROUP_CONCAT_SEPARATOR.get((Aggregate) expression);
            if (separator != null)
                res.setGroupConcatSeparator(parseExpression(separator, calcTypes));
            return res;
        }
    }
    if (expression instanceof ExpressionList) {
        Expression[] exprs = EXPR_LIST.get((ExpressionList) expression);
        GridSqlArray res = new GridSqlArray(exprs.length);
        for (Expression expr : exprs) res.addChild(parseExpression(expr, calcTypes));
        return res;
    }
    if (expression instanceof ConditionExists) {
        Query qry = QUERY_EXISTS.get((ConditionExists) expression);
        GridSqlOperation res = new GridSqlOperation(EXISTS);
        res.addChild(parseQueryExpression(qry));
        return res;
    }
    throw new IgniteException("Unsupported expression: " + expression + " [type=" + expression.getClass().getSimpleName() + ']');
}