Examples with SQLServerSelectQueryBlock com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock used on opensource projects

Example 6 with SQLServerSelectQueryBlock

use of com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock in project druid by alibaba.

the class SQLServerSelectTest_outer_apply method test_0.

public void test_0() throws Exception {
    String sql = "SELECT DeptID, DeptName, DeptMgrID, EmpID, EmpLastName, EmpSalary FROM Departments d OUTER APPLY dbo.GetReports(d.DeptMgrID)";
    SQLServerStatementParser parser = new SQLServerStatementParser(sql);
    List<SQLStatement> statementList = parser.parseStatementList();
    SQLStatement stmt = statementList.get(0);
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelect select = selectStmt.getSelect();
    Assert.assertNotNull(select.getQuery());
    SQLServerSelectQueryBlock queryBlock = (SQLServerSelectQueryBlock) select.getQuery();
    Assert.assertNull(queryBlock.getGroupBy());
    String fomatSQL = SQLUtils.toSQLString(statementList, JdbcUtils.SQL_SERVER);
    // System.out.println(fomatSQL);
    Assert.assertEquals(1, statementList.size());
    SQLServerSchemaStatVisitor visitor = new SQLServerSchemaStatVisitor();
    stmt.accept(visitor);
    // System.out.println("Tables : " + visitor.getTables());
    // System.out.println("fields : " + visitor.getColumns());
    // System.out.println("coditions : " + visitor.getConditions());
    // System.out.println("orderBy : " + visitor.getOrderByColumns());
    Assert.assertEquals(1, visitor.getTables().size());
    Assert.assertEquals(7, visitor.getColumns().size());
    Assert.assertEquals(0, visitor.getConditions().size());
    Assert.assertEquals(0, visitor.getOrderByColumns().size());
    String expected = // 
    "SELECT DeptID, DeptName, DeptMgrID, EmpID, EmpLastName" + // 
    "\n\t, EmpSalary" + // 
    "\nFROM Departments d" + "\n\tOUTER APPLY dbo.GetReports(d.DeptMgrID)";
    Assert.assertEquals(expected, fomatSQL);
}

Example 7 with SQLServerSelectQueryBlock

use of com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock in project druid by alibaba.

the class SQLServerSelectTest_cross_apply method test_0.

public void test_0() throws Exception {
    String sql = "SELECT DeptID, DeptName, DeptMgrID, EmpID, EmpLastName, EmpSalary FROM Departments d CROSS APPLY dbo.GetReports(d.DeptMgrID)";
    SQLServerStatementParser parser = new SQLServerStatementParser(sql);
    List<SQLStatement> statementList = parser.parseStatementList();
    SQLStatement stmt = statementList.get(0);
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelect select = selectStmt.getSelect();
    Assert.assertNotNull(select.getQuery());
    SQLServerSelectQueryBlock queryBlock = (SQLServerSelectQueryBlock) select.getQuery();
    Assert.assertNull(queryBlock.getGroupBy());
    String fomatSQL = SQLUtils.toSQLString(statementList, JdbcUtils.SQL_SERVER);
    // System.out.println(fomatSQL);
    Assert.assertEquals(1, statementList.size());
    SQLServerSchemaStatVisitor visitor = new SQLServerSchemaStatVisitor();
    stmt.accept(visitor);
    // System.out.println("Tables : " + visitor.getTables());
    // System.out.println("fields : " + visitor.getColumns());
    // System.out.println("coditions : " + visitor.getConditions());
    // System.out.println("orderBy : " + visitor.getOrderByColumns());
    Assert.assertEquals(1, visitor.getTables().size());
    Assert.assertEquals(7, visitor.getColumns().size());
    Assert.assertEquals(0, visitor.getConditions().size());
    Assert.assertEquals(0, visitor.getOrderByColumns().size());
    String expected = // 
    "SELECT DeptID, DeptName, DeptMgrID, EmpID, EmpLastName" + // 
    "\n\t, EmpSalary" + // 
    "\nFROM Departments d" + "\n\tCROSS APPLY dbo.GetReports(d.DeptMgrID)";
    Assert.assertEquals(expected, fomatSQL);
}

Example 8 with SQLServerSelectQueryBlock

use of com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock in project druid by alibaba.

the class PagerUtils method limitSQLServer.

private static boolean limitSQLServer(SQLSelect select, DbType dbType, int offset, int count, boolean check) {
    SQLSelectQuery query = select.getQuery();
    SQLBinaryOpExpr gt = new // 
    SQLBinaryOpExpr(// 
    new SQLIdentifierExpr("ROWNUM"), // 
    SQLBinaryOperator.GreaterThan, // 
    new SQLNumberExpr(offset), DbType.sqlserver);
    SQLBinaryOpExpr lteq = new // 
    SQLBinaryOpExpr(// 
    new SQLIdentifierExpr("ROWNUM"), // 
    SQLBinaryOperator.LessThanOrEqual, // 
    new SQLNumberExpr(count + offset), DbType.sqlserver);
    SQLBinaryOpExpr pageCondition = new SQLBinaryOpExpr(gt, SQLBinaryOperator.BooleanAnd, lteq, DbType.sqlserver);
    if (query instanceof SQLSelectQueryBlock) {
        SQLServerSelectQueryBlock queryBlock = (SQLServerSelectQueryBlock) query;
        if (offset <= 0) {
            SQLServerTop top = queryBlock.getTop();
            if (check && top != null && !top.isPercent() && top.getExpr() instanceof SQLNumericLiteralExpr) {
                int rowCount = ((SQLNumericLiteralExpr) top.getExpr()).getNumber().intValue();
                if (rowCount <= count) {
                    return false;
                }
            }
            queryBlock.setTop(new SQLServerTop(new SQLNumberExpr(count)));
            return true;
        }
        SQLAggregateExpr aggregateExpr = new SQLAggregateExpr("ROW_NUMBER");
        SQLOrderBy orderBy = select.getOrderBy();
        if (orderBy != null) {
            aggregateExpr.setOver(new SQLOver(orderBy));
            select.setOrderBy(null);
        } else if (queryBlock.getOrderBy() != null) {
            aggregateExpr.setOver(new SQLOver(queryBlock.getOrderBy()));
            queryBlock.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.clone(), "XX"));
        countQueryBlock.setWhere(pageCondition);
        select.setQuery(countQueryBlock);
        return true;
    }
    SQLServerSelectQueryBlock countQueryBlock = new SQLServerSelectQueryBlock();
    countQueryBlock.getSelectList().add(new SQLSelectItem(new SQLPropertyExpr(new SQLIdentifierExpr("XX"), "*")));
    countQueryBlock.setFrom(new SQLSubqueryTableSource(select.clone(), "XX"));
    if (offset <= 0) {
        countQueryBlock.setTop(new SQLServerTop(new SQLNumberExpr(count)));
        select.setQuery(countQueryBlock);
        return true;
    }
    SQLAggregateExpr aggregateExpr = new SQLAggregateExpr("ROW_NUMBER");
    SQLOrderBy orderBy = select.getOrderBy();
    aggregateExpr.setOver(new SQLOver(orderBy));
    select.setOrderBy(null);
    countQueryBlock.getSelectList().add(new SQLSelectItem(aggregateExpr, "ROWNUM"));
    SQLServerSelectQueryBlock offsetQueryBlock = new SQLServerSelectQueryBlock();
    offsetQueryBlock.getSelectList().add(new SQLSelectItem(new SQLAllColumnExpr()));
    offsetQueryBlock.setFrom(new SQLSubqueryTableSource(new SQLSelect(countQueryBlock), "XXX"));
    offsetQueryBlock.setWhere(pageCondition);
    select.setQuery(offsetQueryBlock);
    return true;
}

Example 9 with SQLServerSelectQueryBlock

use of com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectParser method parseAggGroupCommon.

protected Map<String, String> parseAggGroupCommon(SchemaConfig schema, SQLStatement stmt, RouteResultset rrs, SQLSelectQueryBlock mysqlSelectQuery) {
    Map<String, String> aliaColumns = new HashMap<String, String>();
    Map<String, Integer> aggrColumns = new HashMap<String, Integer>();
    // Added by winbill, 20160314, for having clause, Begin ==>
    List<String> havingColsName = new ArrayList<String>();
    // Added by winbill, 20160314, for having clause, End  <==
    List<SQLSelectItem> selectList = mysqlSelectQuery.getSelectList();
    boolean isNeedChangeSql = false;
    int size = selectList.size();
    boolean isDistinct = mysqlSelectQuery.getDistionOption() == 2;
    for (int i = 0; i < size; i++) {
        SQLSelectItem item = selectList.get(i);
        if (item.getExpr() instanceof SQLAggregateExpr) {
            SQLAggregateExpr expr = (SQLAggregateExpr) item.getExpr();
            String method = expr.getMethodName();
            boolean isHasArgument = !expr.getArguments().isEmpty();
            if (isHasArgument) {
                // Added by winbill, 20160314, for having clause
                String aggrColName = method + "(" + expr.getArguments().get(0) + ")";
                // Added by winbill, 20160314, for having clause
                havingColsName.add(aggrColName);
            }
            // 只处理有别名的情况，无别名添加别名，否则某些数据库会得不到正确结果处理
            int mergeType = MergeCol.getMergeType(method);
            if (MergeCol.MERGE_AVG == mergeType && isRoutMultiNode(schema, rrs)) {
                // 跨分片avg需要特殊处理，直接avg结果是不对的
                String colName = item.getAlias() != null ? item.getAlias() : method + i;
                SQLSelectItem sum = new SQLSelectItem();
                String sumColName = colName + "SUM";
                sum.setAlias(sumColName);
                SQLAggregateExpr sumExp = new SQLAggregateExpr("SUM");
                ObjectUtil.copyProperties(expr, sumExp);
                sumExp.getArguments().addAll(expr.getArguments());
                sumExp.setMethodName("SUM");
                sum.setExpr(sumExp);
                selectList.set(i, sum);
                aggrColumns.put(sumColName, MergeCol.MERGE_SUM);
                // Added by winbill, 20160314, for having clause
                havingColsName.add(sumColName);
                // Added by winbill, 20160314, two aliases for AVG
                havingColsName.add(item.getAlias() != null ? item.getAlias() : "");
                SQLSelectItem count = new SQLSelectItem();
                String countColName = colName + "COUNT";
                count.setAlias(countColName);
                SQLAggregateExpr countExp = new SQLAggregateExpr("COUNT");
                ObjectUtil.copyProperties(expr, countExp);
                countExp.getArguments().addAll(expr.getArguments());
                countExp.setMethodName("COUNT");
                count.setExpr(countExp);
                selectList.add(count);
                aggrColumns.put(countColName, MergeCol.MERGE_COUNT);
                isNeedChangeSql = true;
                aggrColumns.put(colName, mergeType);
                rrs.setHasAggrColumn(true);
            } else if (MergeCol.MERGE_UNSUPPORT != mergeType) {
                String aggColName = null;
                StringBuilder sb = new StringBuilder();
                if (mysqlSelectQuery instanceof MySqlSelectQueryBlock) {
                    expr.accept(new MySqlOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof OracleSelectQueryBlock) {
                    expr.accept(new OracleOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof PGSelectQueryBlock) {
                    expr.accept(new PGOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof SQLServerSelectQueryBlock) {
                    expr.accept(new SQLASTOutputVisitor(sb));
                } else if (mysqlSelectQuery instanceof DB2SelectQueryBlock) {
                    expr.accept(new DB2OutputVisitor(sb));
                }
                aggColName = sb.toString();
                if (item.getAlias() != null && item.getAlias().length() > 0) {
                    aggrColumns.put(item.getAlias(), mergeType);
                    aliaColumns.put(aggColName, item.getAlias());
                } else {
                    // 如果不加，jdbc方式时取不到正确结果   ;修改添加别名
                    item.setAlias(method + i);
                    aggrColumns.put(method + i, mergeType);
                    aliaColumns.put(aggColName, method + i);
                    isNeedChangeSql = true;
                }
                rrs.setHasAggrColumn(true);
                // Added by winbill, 20160314, for having clause
                havingColsName.add(item.getAlias());
                // Added by winbill, 20160314, one alias for non-AVG
                havingColsName.add("");
            }
        } else {
            if (!(item.getExpr() instanceof SQLAllColumnExpr)) {
                String alia = item.getAlias();
                String field = getFieldName(item);
                if (alia == null) {
                    alia = field;
                }
                aliaColumns.put(field, alia);
            }
        }
    }
    if (aggrColumns.size() > 0) {
        rrs.setMergeCols(aggrColumns);
    }
    // 通过优化转换成group by来实现
    if (isDistinct) {
        mysqlSelectQuery.setDistionOption(0);
        SQLSelectGroupByClause groupBy = new SQLSelectGroupByClause();
        for (String fieldName : aliaColumns.keySet()) {
            groupBy.addItem(new SQLIdentifierExpr(fieldName));
        }
        mysqlSelectQuery.setGroupBy(groupBy);
        isNeedChangeSql = true;
    }
    // setGroupByCols
    if (mysqlSelectQuery.getGroupBy() != null) {
        List<SQLExpr> groupByItems = mysqlSelectQuery.getGroupBy().getItems();
        String[] groupByCols = buildGroupByCols(groupByItems, aliaColumns);
        rrs.setGroupByCols(groupByCols);
        rrs.setHavings(buildGroupByHaving(mysqlSelectQuery.getGroupBy().getHaving(), aliaColumns));
        rrs.setHasAggrColumn(true);
        // Added by winbill, 20160314, for having clause
        rrs.setHavingColsName(havingColsName.toArray());
    }
    if (isNeedChangeSql) {
        String sql = stmt.toString();
        rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, -1, false);
        getCtx().setSql(sql);
    }
    return aliaColumns;
}

Example 10 with SQLServerSelectQueryBlock

use of com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock in project Mycat-Server by MyCATApache.

the class PageSQLUtil method convertLimitToNativePageSql.

public static String convertLimitToNativePageSql(String dbType, String sql, int offset, int count) {
    if (JdbcConstants.ORACLE.equalsIgnoreCase(dbType)) {
        OracleStatementParser oracleParser = new OracleStatementParser(sql);
        SQLSelectStatement oracleStmt = (SQLSelectStatement) oracleParser.parseStatement();
        return PagerUtils.limit(oracleStmt.getSelect(), JdbcConstants.ORACLE, offset, count);
    } else if (JdbcConstants.SQL_SERVER.equalsIgnoreCase(dbType)) {
        SQLServerStatementParser oracleParser = new SQLServerStatementParser(sql);
        SQLSelectStatement sqlserverStmt = (SQLSelectStatement) oracleParser.parseStatement();
        SQLSelect select = sqlserverStmt.getSelect();
        SQLOrderBy orderBy = select.getOrderBy();
        if (orderBy == null) {
            SQLSelectQuery sqlSelectQuery = select.getQuery();
            if (sqlSelectQuery instanceof SQLServerSelectQueryBlock) {
                SQLServerSelectQueryBlock sqlServerSelectQueryBlock = (SQLServerSelectQueryBlock) sqlSelectQuery;
                SQLTableSource from = sqlServerSelectQueryBlock.getFrom();
                if ("limit".equalsIgnoreCase(from.getAlias())) {
                    from.setAlias(null);
                }
            }
            SQLOrderBy newOrderBy = new SQLOrderBy(new SQLIdentifierExpr("(select 0)"));
            select.setOrderBy(newOrderBy);
        }
        return PagerUtils.limit(select, JdbcConstants.SQL_SERVER, offset, count);
    } else if (JdbcConstants.DB2.equalsIgnoreCase(dbType)) {
        DB2StatementParser db2Parser = new DB2StatementParser(sql);
        SQLSelectStatement db2Stmt = (SQLSelectStatement) db2Parser.parseStatement();
        return limitDB2(db2Stmt.getSelect(), JdbcConstants.DB2, offset, count);
    } else if (JdbcConstants.POSTGRESQL.equalsIgnoreCase(dbType)) {
        PGSQLStatementParser pgParser = new PGSQLStatementParser(sql);
        SQLSelectStatement pgStmt = (SQLSelectStatement) pgParser.parseStatement();
        SQLSelect select = pgStmt.getSelect();
        SQLSelectQuery query = select.getQuery();
        if (query instanceof PGSelectQueryBlock) {
            PGSelectQueryBlock pgSelectQueryBlock = (PGSelectQueryBlock) query;
            pgSelectQueryBlock.setOffset(null);
            pgSelectQueryBlock.setLimit(null);
        }
        return PagerUtils.limit(select, JdbcConstants.POSTGRESQL, offset, count);
    } else if (JdbcConstants.MYSQL.equalsIgnoreCase(dbType)) {
        MySqlStatementParser pgParser = new MySqlStatementParser(sql);
        SQLSelectStatement pgStmt = (SQLSelectStatement) pgParser.parseStatement();
        SQLSelect select = pgStmt.getSelect();
        SQLSelectQuery query = select.getQuery();
        if (query instanceof MySqlSelectQueryBlock) {
            MySqlSelectQueryBlock pgSelectQueryBlock = (MySqlSelectQueryBlock) query;
            pgSelectQueryBlock.setLimit(null);
        }
        return PagerUtils.limit(select, JdbcConstants.MYSQL, offset, count);
    }
    return sql;
}