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

Example 1 with ConditionInParameter

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

the class Parser method readCondition.

private Expression readCondition() {
    if (readIf("NOT")) {
        return new ConditionNot(readCondition());
    }
    if (readIf("EXISTS")) {
        read("(");
        Query query = parseSelect();
        // can not reduce expression because it might be a union except
        // query with distinct
        read(")");
        return new ConditionExists(query);
    }
    if (readIf("INTERSECTS")) {
        read("(");
        Expression r1 = readConcat();
        read(",");
        Expression r2 = readConcat();
        read(")");
        return new Comparison(session, Comparison.SPATIAL_INTERSECTS, r1, r2);
    }
    Expression r = readConcat();
    while (true) {
        // special case: NOT NULL is not part of an expression (as in CREATE
        // TABLE TEST(ID INT DEFAULT 0 NOT NULL))
        int backup = parseIndex;
        boolean not = false;
        if (readIf("NOT")) {
            not = true;
            if (isToken("NULL")) {
                // this really only works for NOT NULL!
                parseIndex = backup;
                currentToken = "NOT";
                break;
            }
        }
        if (readIf("LIKE")) {
            Expression b = readConcat();
            Expression esc = null;
            if (readIf("ESCAPE")) {
                esc = readConcat();
            }
            recompileAlways = true;
            r = new CompareLike(database, r, b, esc, false);
        } else if (readIf("ILIKE")) {
            Function function = Function.getFunction(database, "CAST");
            function.setDataType(new Column("X", Value.STRING_IGNORECASE));
            function.setParameter(0, r);
            r = function;
            Expression b = readConcat();
            Expression esc = null;
            if (readIf("ESCAPE")) {
                esc = readConcat();
            }
            recompileAlways = true;
            r = new CompareLike(database, r, b, esc, false);
        } else if (readIf("REGEXP")) {
            Expression b = readConcat();
            recompileAlways = true;
            r = new CompareLike(database, r, b, null, true);
        } else if (readIf("IS")) {
            if (readIf("NOT")) {
                if (readIf("NULL")) {
                    r = new Comparison(session, Comparison.IS_NOT_NULL, r, null);
                } else if (readIf("DISTINCT")) {
                    read("FROM");
                    r = new Comparison(session, Comparison.EQUAL_NULL_SAFE, r, readConcat());
                } else {
                    r = new Comparison(session, Comparison.NOT_EQUAL_NULL_SAFE, r, readConcat());
                }
            } else if (readIf("NULL")) {
                r = new Comparison(session, Comparison.IS_NULL, r, null);
            } else if (readIf("DISTINCT")) {
                read("FROM");
                r = new Comparison(session, Comparison.NOT_EQUAL_NULL_SAFE, r, readConcat());
            } else {
                r = new Comparison(session, Comparison.EQUAL_NULL_SAFE, r, readConcat());
            }
        } else if (readIf("IN")) {
            read("(");
            if (readIf(")")) {
                if (database.getMode().prohibitEmptyInPredicate) {
                    throw getSyntaxError();
                }
                r = ValueExpression.get(ValueBoolean.FALSE);
            } else {
                if (isSelect()) {
                    Query query = parseSelect();
                    // can not be lazy because we have to call
                    // method ResultInterface.containsDistinct
                    // which is not supported for lazy execution
                    query.setNeverLazy(true);
                    r = new ConditionInSelect(database, r, query, false, Comparison.EQUAL);
                } else {
                    ArrayList<Expression> v = New.arrayList();
                    Expression last;
                    do {
                        last = readExpression();
                        v.add(last);
                    } while (readIf(","));
                    if (v.size() == 1 && (last instanceof Subquery)) {
                        Subquery s = (Subquery) last;
                        Query q = s.getQuery();
                        r = new ConditionInSelect(database, r, q, false, Comparison.EQUAL);
                    } else {
                        r = new ConditionIn(database, r, v);
                    }
                }
                read(")");
            }
        } else if (readIf("BETWEEN")) {
            Expression low = readConcat();
            read("AND");
            Expression high = readConcat();
            Expression condLow = new Comparison(session, Comparison.SMALLER_EQUAL, low, r);
            Expression condHigh = new Comparison(session, Comparison.BIGGER_EQUAL, high, r);
            r = new ConditionAndOr(ConditionAndOr.AND, condLow, condHigh);
        } else {
            int compareType = getCompareType(currentTokenType);
            if (compareType < 0) {
                break;
            }
            read();
            if (readIf("ALL")) {
                read("(");
                Query query = parseSelect();
                r = new ConditionInSelect(database, r, query, true, compareType);
                read(")");
            } else if (readIf("ANY") || readIf("SOME")) {
                read("(");
                if (currentTokenType == PARAMETER && compareType == 0) {
                    Parameter p = readParameter();
                    r = new ConditionInParameter(database, r, p);
                } else {
                    Query query = parseSelect();
                    r = new ConditionInSelect(database, r, query, false, compareType);
                }
                read(")");
            } else {
                Expression right = readConcat();
                if (SysProperties.OLD_STYLE_OUTER_JOIN && readIf("(") && readIf("+") && readIf(")")) {
                    // join with (+)
                    if (r instanceof ExpressionColumn && right instanceof ExpressionColumn) {
                        ExpressionColumn leftCol = (ExpressionColumn) r;
                        ExpressionColumn rightCol = (ExpressionColumn) right;
                        ArrayList<TableFilter> filters = currentSelect.getTopFilters();
                        for (TableFilter f : filters) {
                            while (f != null) {
                                leftCol.mapColumns(f, 0);
                                rightCol.mapColumns(f, 0);
                                f = f.getJoin();
                            }
                        }
                        TableFilter leftFilter = leftCol.getTableFilter();
                        TableFilter rightFilter = rightCol.getTableFilter();
                        r = new Comparison(session, compareType, r, right);
                        if (leftFilter != null && rightFilter != null) {
                            int idx = filters.indexOf(rightFilter);
                            if (idx >= 0) {
                                filters.remove(idx);
                                leftFilter.addJoin(rightFilter, true, r);
                            } else {
                                rightFilter.mapAndAddFilter(r);
                            }
                            r = ValueExpression.get(ValueBoolean.TRUE);
                        }
                    }
                } else {
                    r = new Comparison(session, compareType, r, right);
                }
            }
        }
        if (not) {
            r = new ConditionNot(r);
        }
    }
    return r;
}