Package com.alibaba.druid.sql.ast.statement

Examples of com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock

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    public SQLSelectQueryBlock explainToSelectSQLObject(String sql) {
        return provider.explainToSelectSQLObject(this, sql);
    }

    public String explainToSelectSQL(String sql) {
        SQLSelectQueryBlock query = explainToSelectSQLObject(sql);

        query.accept(this.createMappingVisitor());

        return toSQL(query);
    }
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        return out.toString();
    }

    public List<Map<String, Object>> select(Connection conn, String sql, List<Object> parameters) throws SQLException {
        SQLSelectQueryBlock sqlObject = this.explainToSelectSQLObject(sql);
        exportParameters(sqlObject, parameters);
        String rawSql = this.toSQL(sqlObject);
        return JdbcUtils.executeQuery(conn, rawSql, parameters);
    }
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        }
    }

    public boolean visit(SQLOrderBy x) {
        OrderByStatVisitor orderByVisitor = new OrderByStatVisitor(x);
        SQLSelectQueryBlock query = null;
        if (x.getParent() instanceof SQLSelectQueryBlock) {
            query = (SQLSelectQueryBlock) x.getParent();
        }
        if (query != null) {
            for (SQLSelectOrderByItem item : x.getItems()) {
                SQLExpr expr = item.getExpr();
                if (expr instanceof SQLIntegerExpr) {
                    int intValue = ((SQLIntegerExpr) expr).getNumber().intValue() - 1;
                    if (intValue < query.getSelectList().size()) {
                        SQLSelectItem selectItem = query.getSelectList().get(intValue);
                        selectItem.getExpr().accept(orderByVisitor);
                    }
                }
            }
        }
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    public static boolean isSimpleCountTableSource(SQLSelect select) {
        SQLSelectQuery query = select.getQuery();

        if (query instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) query;

            boolean allawTrueWhere = false;

            if (queryBlock.getWhere() == null) {
                allawTrueWhere = true;
            } else {
                Object whereValue = getValue(queryBlock.getWhere());
                if (whereValue == Boolean.TRUE) {
                    allawTrueWhere = true;
                } else if (whereValue == Boolean.FALSE) {
                    return false;
                }
            }
            boolean simpleCount = false;
            if (queryBlock.getSelectList().size() == 1) {
                SQLExpr selectItemExpr = queryBlock.getSelectList().get(0).getExpr();
                if (selectItemExpr instanceof SQLAggregateExpr) {
                    if (((SQLAggregateExpr) selectItemExpr).getMethodName().equalsIgnoreCase("COUNT")) {
                        simpleCount = true;
                    }
                }
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        }
    }

    public static boolean queryBlockFromIsNull(SQLSelectQuery query) {
        if (query instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) query;
            SQLTableSource from = queryBlock.getFrom();

            if (from == null) {
                return true;
            }

            if (from instanceof SQLExprTableSource) {
                SQLExpr fromExpr = ((SQLExprTableSource) from).getExpr();
                if (fromExpr instanceof SQLName) {
                    String name = fromExpr.toString();

                    name = form(name);

                    if (name.equalsIgnoreCase("DUAL")) {
                        return true;
                    }
                }
            }

            if (queryBlock.getSelectList().size() == 1
                && queryBlock.getSelectList().get(0).getExpr() instanceof SQLAllColumnExpr) {
                if (from instanceof SQLSubqueryTableSource) {
                    SQLSelectQuery subQuery = ((SQLSubqueryTableSource) from).getSelect().getQuery();
                    if (queryBlockFromIsNull(subQuery)) {
                        return true;
                    }
                }
            }

            boolean allIsConst = true;
            for (SQLSelectItem item : queryBlock.getSelectList()) {
                if (getValue(item.getExpr()) == null) {
                    allIsConst = false;
                    break;
                }
            }
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            return queryRest(select);
        }

        accept(Token.SELECT);

        SQLSelectQueryBlock queryBlock = new SQLSelectQueryBlock();

        if (lexer.token() == Token.DISTINCT) {
            queryBlock.setDistionOption(SQLSetQuantifier.DISTINCT);
            lexer.nextToken();
        } else if (lexer.token() == Token.UNIQUE) {
            queryBlock.setDistionOption(SQLSetQuantifier.UNIQUE);
            lexer.nextToken();
        } else if (lexer.token() == Token.ALL) {
            queryBlock.setDistionOption(SQLSetQuantifier.ALL);
            lexer.nextToken();
        }

        parseSelectList(queryBlock);
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        }
    }

    public boolean visit(SQLOrderBy x) {
        OrderByStatVisitor orderByVisitor = new OrderByStatVisitor(x);
        SQLSelectQueryBlock query = null;
        if (x.getParent() instanceof SQLSelectQueryBlock) {
            query = (SQLSelectQueryBlock) x.getParent();
        }
        if (query != null) {
            for (SQLSelectOrderByItem item : x.getItems()) {
                SQLExpr expr = item.getExpr();
                if (expr instanceof SQLIntegerExpr) {
                    int intValue = ((SQLIntegerExpr) expr).getNumber().intValue() - 1;
                    if (intValue < query.getSelectList().size()) {
                        SQLSelectItem selectItem = query.getSelectList().get(intValue);
                        selectItem.getExpr().accept(orderByVisitor);
                    }
                }
            }
        }
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        }
    }

    public boolean visit(SQLOrderBy x) {
        OrderByStatVisitor orderByVisitor = new OrderByStatVisitor(x);
        SQLSelectQueryBlock query = null;
        if (x.getParent() instanceof SQLSelectQueryBlock) {
            query = (SQLSelectQueryBlock) x.getParent();
        }
        if (query != null) {
            for (SQLSelectOrderByItem item : x.getItems()) {
                SQLExpr expr = item.getExpr();
                if (expr instanceof SQLIntegerExpr) {
                    int intValue = ((SQLIntegerExpr) expr).getNumber().intValue() - 1;
                    if (intValue < query.getSelectList().size()) {
                        SQLSelectItem selectItem = query.getSelectList().get(intValue);
                        selectItem.getExpr().accept(orderByVisitor);
                    }
                }
            }
        }
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            return;
        }

        if (expr instanceof SQLAllColumnExpr //
            && x.getParent() instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) x.getParent();
            SQLTableSource from = queryBlock.getFrom();

            if (from instanceof SQLExprTableSource) {
                addViolation(visitor, ErrorCode.SELECT_NOT_ALLOW, "'SELECT *' not allow", x);
            }
        }
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        } else if (parent instanceof SQLUpdateStatement) {
            SQLUpdateStatement updateStmt = (SQLUpdateStatement) parent;
            updateStmt.setWhere(condition);
            visitor.setSqlModified(true);
        } else if (parent instanceof SQLSelectQueryBlock) {
            SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) parent;
            queryBlock.setWhere(condition);
            visitor.setSqlModified(true);
        }
    }
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  • com.alibaba.druid.mapping.MappingEngine
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  • com.alibaba.druid.sql.PagerUtils
  • com.alibaba.druid.sql.parser.SQLSelectParser
  • com.alibaba.druid.sql.visitor.SchemaStatVisitor
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