Package com.alibaba.druid.sql.ast.expr

Examples of com.alibaba.druid.sql.ast.expr.SQLNumberExpr

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            throw new IllegalArgumentException("limit already exists.");
        }

        Limit limit = new Limit();
        if (offset > 0) {
            limit.setOffset(new SQLNumberExpr(offset));
        }
        limit.setRowCount(new SQLNumberExpr(count));
        queryBlock.setLimit(limit);

        return SQLUtils.toSQLString(queryBlock, dbType);
    }
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        }

            PGLimit limit = new PGLimit();
            if (offset > 0)
            {
                limit.setOffset(new SQLNumberExpr(offset));
            }
            limit.setRowCount(new SQLNumberExpr(count));
            queryBlock.setLimit(limit);

            return SQLUtils.toSQLString(queryBlock, dbType);
        }
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    private static String limitDB2(SQLSelect select, String dbType, int offset, int count) {
        SQLSelectQuery query = select.getQuery();

        SQLBinaryOpExpr gt = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                 SQLBinaryOperator.GreaterThan, //
                                                 new SQLNumberExpr(offset));
        SQLBinaryOpExpr lteq = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                   SQLBinaryOperator.LessThanOrEqual, //
                                                   new SQLNumberExpr(count + offset));
        SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq);

        if (query instanceof SQLSelectQueryBlock) {
            DB2SelectQueryBlock queryBlock = (DB2SelectQueryBlock) query;
            if (offset <= 0) {
                queryBlock.setFirst(new SQLNumberExpr(count));
                return SQLUtils.toSQLString(select, dbType);
            }

            SQLAggregateExpr aggregateExpr = new SQLAggregateExpr("ROW_NUMBER");
            SQLOrderBy orderBy = select.getOrderBy();
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    private static String limitSQLServer(SQLSelect select, String dbType, int offset, int count) {
        SQLSelectQuery query = select.getQuery();

        SQLBinaryOpExpr gt = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                 SQLBinaryOperator.GreaterThan, //
                                                 new SQLNumberExpr(offset));
        SQLBinaryOpExpr lteq = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                   SQLBinaryOperator.LessThanOrEqual, //
                                                   new SQLNumberExpr(count + offset));
        SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq);

        if (query instanceof SQLSelectQueryBlock) {
            SQLServerSelectQueryBlock queryBlock = (SQLServerSelectQueryBlock) query;
            if (offset <= 0) {
                queryBlock.setTop(new SQLServerTop(new SQLNumberExpr(count)));
                return SQLUtils.toSQLString(select, dbType);
            }

            SQLAggregateExpr aggregateExpr = new SQLAggregateExpr("ROW_NUMBER");
            SQLOrderBy orderBy = select.getOrderBy();
            aggregateExpr.setOver(new SQLOver(orderBy));
            select.setOrderBy(null);

            queryBlock.getSelectList().add(new SQLSelectItem(aggregateExpr, "ROWNUM"));

            SQLServerSelectQueryBlock countQueryBlock = new SQLServerSelectQueryBlock();
            countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLAllColumnExpr()));

            countQueryBlock.setFrom(new SQLSubqueryTableSource(select, "XX"));

            countQueryBlock.setWhere(pageCondition);

            return SQLUtils.toSQLString(countQueryBlock, dbType);
        }
       

        SQLServerSelectQueryBlock countQueryBlock = new SQLServerSelectQueryBlock();
        countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLPropertyExpr(new SQLIdentifierExpr("XX"), "*")));

        countQueryBlock.setFrom(new SQLSubqueryTableSource(select, "XX"));
       
        if (offset <= 0) {
            countQueryBlock.setTop(new SQLServerTop(new SQLNumberExpr(count)));
            return SQLUtils.toSQLString(countQueryBlock, dbType);
        }
       
        SQLAggregateExpr aggregateExpr = new SQLAggregateExpr("ROW_NUMBER");
        SQLOrderBy orderBy = select.getOrderBy();
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        if (query instanceof SQLSelectQueryBlock) {
            OracleSelectQueryBlock queryBlock = (OracleSelectQueryBlock) query;
            if (queryBlock.getGroupBy() == null && select.getOrderBy() == null && offset <= 0) {
                SQLExpr condition = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                        SQLBinaryOperator.LessThanOrEqual, //
                                                        new SQLNumberExpr(count));
                if (queryBlock.getWhere() == null) {
                    queryBlock.setWhere(condition);
                } else {
                    queryBlock.setWhere(new SQLBinaryOpExpr(queryBlock.getWhere(), //
                                                            SQLBinaryOperator.BooleanAnd, //
                                                            condition));
                }

                return SQLUtils.toSQLString(select, dbType);
            }
        }

        OracleSelectQueryBlock countQueryBlock = new OracleSelectQueryBlock();
        countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLPropertyExpr(new SQLIdentifierExpr("XX"), "*")));
        countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLIdentifierExpr("ROWNUM"), "RN"));

        countQueryBlock.setFrom(new SQLSubqueryTableSource(select, "XX"));
        countQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                     SQLBinaryOperator.LessThanOrEqual, //
                                                     new SQLNumberExpr(count + offset)));
        if (offset <= 0) {
            return SQLUtils.toSQLString(countQueryBlock, dbType);
        }

        OracleSelectQueryBlock offsetQueryBlock = new OracleSelectQueryBlock();
        offsetQueryBlock.getSelectList().add(new SQLSelectItem(new SQLAllColumnExpr()));
        offsetQueryBlock.setFrom(new SQLSubqueryTableSource(new SQLSelect(countQueryBlock), "XXX"));
        offsetQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("RN"), //
                                                      SQLBinaryOperator.GreaterThan, //
                                                      new SQLNumberExpr(offset)));

        return SQLUtils.toSQLString(offsetQueryBlock, dbType);
    }
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            throw new IllegalArgumentException("limit already exists.");
        }

        Limit limit = new Limit();
        if (offset > 0) {
            limit.setOffset(new SQLNumberExpr(offset));
        }
        limit.setRowCount(new SQLNumberExpr(count));
        queryBlock.setLimit(limit);

        return SQLUtils.toSQLString(queryBlock, dbType);
    }
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                    case LITERAL_INT:
                        sqlExpr = new SQLIntegerExpr(lexer.integerValue());
                        lexer.nextToken();
                        break;
                    case LITERAL_FLOAT:
                        sqlExpr = new SQLNumberExpr(lexer.decimalValue());
                        lexer.nextToken();
                        break;
                    case BINARY_FLOAT:
                        sqlExpr = new OracleBinaryFloatExpr(Float.parseFloat(lexer.numberString()));
                        lexer.nextToken();
                        break;
                    case BINARY_DOUBLE:
                        sqlExpr = new OracleBinaryDoubleExpr(Double.parseDouble(lexer.numberString()));
                        lexer.nextToken();
                        break;
                    default:
                        throw new ParserException("TODO");
                }
                return primaryRest(sqlExpr);
            case SUB:
                lexer.nextToken();
                switch (lexer.token()) {
                    case LITERAL_INT:
                        Number integerValue = lexer.integerValue();
                        if (integerValue instanceof Integer) {
                            int intVal = ((Integer) integerValue).intValue();
                            if (intVal == Integer.MIN_VALUE) {
                                integerValue = Long.valueOf(((long) intVal) * -1);
                            } else {
                                integerValue = Integer.valueOf(intVal * -1);
                            }
                        } else if (integerValue instanceof Long) {
                            long longVal = ((Long) integerValue).longValue();
                            if (longVal == 2147483648L) {
                                integerValue = Integer.valueOf((int) (((long) longVal) * -1));
                            } else {
                                integerValue = Long.valueOf(longVal * -1);
                            }
                        } else {
                            integerValue = ((BigInteger) integerValue).negate();
                        }
                        sqlExpr = new SQLIntegerExpr(integerValue);
                        lexer.nextToken();
                        break;
                    case LITERAL_FLOAT:
                        sqlExpr = new SQLNumberExpr(lexer.decimalValue().negate());
                        lexer.nextToken();
                        break;
                    case BINARY_FLOAT:
                        sqlExpr = new OracleBinaryFloatExpr(Float.parseFloat(lexer.numberString()) * -1);
                        lexer.nextToken();
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                    case LITERAL_INT:
                        sqlExpr = new SQLIntegerExpr(lexer.integerValue());
                        lexer.nextToken();
                        break;
                    case LITERAL_FLOAT:
                        sqlExpr = new SQLNumberExpr(lexer.decimalValue());
                        lexer.nextToken();
                        break;
                    case BINARY_FLOAT:
                        sqlExpr = new OracleBinaryFloatExpr(Float.parseFloat(lexer.numberString()));
                        lexer.nextToken();
                        break;
                    case BINARY_DOUBLE:
                        sqlExpr = new OracleBinaryDoubleExpr(Double.parseDouble(lexer.numberString()));
                        lexer.nextToken();
                        break;
                    case LPAREN:
                        lexer.nextToken();
                        sqlExpr = expr();
                        accept(Token.RPAREN);
                        sqlExpr = new SQLUnaryExpr(SQLUnaryOperator.Plus, sqlExpr);
                        break;
                    default:
                        throw new ParserException("TODO");
                }
                return primaryRest(sqlExpr);
            case SUB:
                lexer.nextToken();
                switch (lexer.token()) {
                    case LITERAL_INT:
                        Number integerValue = lexer.integerValue();
                        if (integerValue instanceof Integer) {
                            int intVal = ((Integer) integerValue).intValue();
                            if (intVal == Integer.MIN_VALUE) {
                                integerValue = Long.valueOf(((long) intVal) * -1);
                            } else {
                                integerValue = Integer.valueOf(intVal * -1);
                            }
                        } else if (integerValue instanceof Long) {
                            long longVal = ((Long) integerValue).longValue();
                            if (longVal == 2147483648L) {
                                integerValue = Integer.valueOf((int) (((long) longVal) * -1));
                            } else {
                                integerValue = Long.valueOf(longVal * -1);
                            }
                        } else {
                            integerValue = ((BigInteger) integerValue).negate();
                        }
                        sqlExpr = new SQLIntegerExpr(integerValue);
                        lexer.nextToken();
                        break;
                    case LITERAL_FLOAT:
                        sqlExpr = new SQLNumberExpr(lexer.decimalValue().negate());
                        lexer.nextToken();
                        break;
                    case BINARY_FLOAT:
                        sqlExpr = new OracleBinaryFloatExpr(Float.parseFloat(lexer.numberString()) * -1);
                        lexer.nextToken();
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        if (query instanceof SQLSelectQueryBlock) {
            OracleSelectQueryBlock queryBlock = (OracleSelectQueryBlock) query;
            if (select.getOrderBy() == null && offset <= 0) {
                SQLExpr condition = new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                        SQLBinaryOperator.LessThanOrEqual, //
                                                        new SQLNumberExpr(count));
                if (queryBlock.getWhere() == null) {
                    queryBlock.setWhere(condition);
                } else {
                    queryBlock.setWhere(new SQLBinaryOpExpr(queryBlock.getWhere(), //
                                                            SQLBinaryOperator.BooleanAnd, //
                                                            condition));
                }

                return SQLUtils.toSQLString(select, dbType);
            }
        }

        OracleSelectQueryBlock countQueryBlock = new OracleSelectQueryBlock();
        countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLPropertyExpr(new SQLIdentifierExpr("XX"), "*")));
        countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLIdentifierExpr("ROWNUM"), "RN"));

        countQueryBlock.setFrom(new SQLSubqueryTableSource(select, "XX"));
        countQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("ROWNUM"), //
                                                     SQLBinaryOperator.LessThanOrEqual, //
                                                     new SQLNumberExpr(count + offset)));
        if (offset <= 0) {
            return SQLUtils.toSQLString(countQueryBlock, dbType);
        }

        OracleSelectQueryBlock offsetQueryBlock = new OracleSelectQueryBlock();
        offsetQueryBlock.getSelectList().add(new SQLSelectItem(new SQLAllColumnExpr()));
        offsetQueryBlock.setFrom(new SQLSubqueryTableSource(new SQLSelect(countQueryBlock), "XXX"));
        offsetQueryBlock.setWhere(new SQLBinaryOpExpr(new SQLIdentifierExpr("RN"), //
                                                      SQLBinaryOperator.GreaterThan, //
                                                      new SQLNumberExpr(offset)));

        return SQLUtils.toSQLString(offsetQueryBlock, dbType);
    }
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            throw new IllegalArgumentException("limit already exists.");
        }

        Limit limit = new Limit();
        if (offset > 0) {
            limit.setOffset(new SQLNumberExpr(offset));
        }
        limit.setRowCount(new SQLNumberExpr(count));
        queryBlock.setLimit(limit);

        return SQLUtils.toSQLString(queryBlock, dbType);
    }
View Full Code Here
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