Examples with MySqlSelectQueryBlock com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock used on opensource projects

Example 16 with MySqlSelectQueryBlock

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DefaultDruidParser method visitorParse.

/**
	 * 子类可覆盖（如果该方法解析得不到表名、字段等信息的，就覆盖该方法，覆盖成空方法，然后通过statementPparse去解析）
	 * 通过visitor解析：有些类型的Statement通过visitor解析得不到表名、
	 * @param stmt
	 */
@Override
public void visitorParse(RouteResultset rrs, SQLStatement stmt, MycatSchemaStatVisitor visitor) throws SQLNonTransientException {
    stmt.accept(visitor);
    ctx.setVisitor(visitor);
    if (stmt instanceof SQLSelectStatement) {
        SQLSelectQuery query = ((SQLSelectStatement) stmt).getSelect().getQuery();
        if (query instanceof MySqlSelectQueryBlock) {
            if (((MySqlSelectQueryBlock) query).isForUpdate()) {
                rrs.setSelectForUpdate(true);
            }
        }
    }
    List<List<Condition>> mergedConditionList = new ArrayList<List<Condition>>();
    if (visitor.hasOrCondition()) {
        //包含or语句
        //TODO
        //根据or拆分
        mergedConditionList = visitor.splitConditions();
    } else {
        //不包含OR语句
        mergedConditionList.add(visitor.getConditions());
    }
    if (visitor.getAliasMap() != null) {
        for (Map.Entry<String, String> entry : visitor.getAliasMap().entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            if (key != null && key.indexOf("`") >= 0) {
                key = key.replaceAll("`", "");
            }
            if (value != null && value.indexOf("`") >= 0) {
                value = value.replaceAll("`", "");
            }
            //表名前面带database的，去掉
            if (key != null) {
                int pos = key.indexOf(".");
                if (pos > 0) {
                    key = key.substring(pos + 1);
                }
                tableAliasMap.put(key.toUpperCase(), value);
            }
        //				else {
        //					tableAliasMap.put(key, value);
        //				}
        }
        ctx.addTables(visitor.getTables());
        visitor.getAliasMap().putAll(tableAliasMap);
        ctx.setTableAliasMap(tableAliasMap);
    }
    ctx.setRouteCalculateUnits(this.buildRouteCalculateUnits(visitor, mergedConditionList));
}

Example 17 with MySqlSelectQueryBlock

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock in project Mycat-Server by MyCATApache.

the class HintSQLHandler method parseProcedure.

private Procedure parseProcedure(String sql, Map hintMap) {
    boolean fields = hintMap.containsKey("list_fields");
    boolean isResultList = hintMap != null && ("list".equals(hintMap.get("result_type")) || fields);
    Procedure procedure = new Procedure();
    procedure.setOriginSql(sql);
    procedure.setResultList(isResultList);
    List<String> sqls = Splitter.on(";").trimResults().splitToList(sql);
    Set<String> outSet = new HashSet<>();
    for (int i = sqls.size() - 1; i >= 0; i--) {
        String s = sqls.get(i);
        if (Strings.isNullOrEmpty(s)) {
            continue;
        }
        SQLStatementParser parser = new MySqlStatementParser(s);
        SQLStatement statement = parser.parseStatement();
        if (statement instanceof SQLSelectStatement) {
            MySqlSelectQueryBlock selectQuery = (MySqlSelectQueryBlock) ((SQLSelectStatement) statement).getSelect().getQuery();
            if (selectQuery != null) {
                List<SQLSelectItem> selectItems = selectQuery.getSelectList();
                for (SQLSelectItem selectItem : selectItems) {
                    String select = selectItem.toString();
                    outSet.add(select);
                    procedure.getSelectColumns().add(select);
                }
            }
            procedure.setSelectSql(s);
        } else if (statement instanceof SQLCallStatement) {
            SQLCallStatement sqlCallStatement = (SQLCallStatement) statement;
            procedure.setName(sqlCallStatement.getProcedureName().getSimpleName());
            List<SQLExpr> paramterList = sqlCallStatement.getParameters();
            for (int i1 = 0; i1 < paramterList.size(); i1++) {
                SQLExpr sqlExpr = paramterList.get(i1);
                String pName = sqlExpr.toString();
                String pType = outSet.contains(pName) ? ProcedureParameter.OUT : ProcedureParameter.IN;
                ProcedureParameter parameter = new ProcedureParameter();
                parameter.setIndex(i1 + 1);
                parameter.setName(pName);
                parameter.setParameterType(pType);
                if (pName.startsWith("@")) {
                    procedure.getParamterMap().put(pName, parameter);
                } else {
                    procedure.getParamterMap().put(String.valueOf(i1 + 1), parameter);
                }
            }
            procedure.setCallSql(s);
        } else if (statement instanceof SQLSetStatement) {
            procedure.setSetSql(s);
            SQLSetStatement setStatement = (SQLSetStatement) statement;
            List<SQLAssignItem> sets = setStatement.getItems();
            for (SQLAssignItem set : sets) {
                String name = set.getTarget().toString();
                SQLExpr value = set.getValue();
                ProcedureParameter parameter = procedure.getParamterMap().get(name);
                if (parameter != null) {
                    if (value instanceof SQLIntegerExpr) {
                        parameter.setValue(((SQLIntegerExpr) value).getNumber());
                        parameter.setJdbcType(Types.INTEGER);
                    } else if (value instanceof SQLNumberExpr) {
                        parameter.setValue(((SQLNumberExpr) value).getNumber());
                        parameter.setJdbcType(Types.NUMERIC);
                    } else if (value instanceof SQLTextLiteralExpr) {
                        parameter.setValue(((SQLTextLiteralExpr) value).getText());
                        parameter.setJdbcType(Types.VARCHAR);
                    } else if (value instanceof SQLValuableExpr) {
                        parameter.setValue(((SQLValuableExpr) value).getValue());
                        parameter.setJdbcType(Types.VARCHAR);
                    }
                }
            }
        }
    }
    if (fields) {
        String list_fields = (String) hintMap.get("list_fields");
        List<String> listFields = Splitter.on(",").trimResults().splitToList(list_fields);
        for (String field : listFields) {
            if (!procedure.getParamterMap().containsKey(field)) {
                ProcedureParameter parameter = new ProcedureParameter();
                parameter.setParameterType(ProcedureParameter.OUT);
                parameter.setName(field);
                parameter.setJdbcType(-10);
                parameter.setIndex(procedure.getParamterMap().size() + 1);
                procedure.getParamterMap().put(field, parameter);
            }
        }
        procedure.getListFields().addAll(listFields);
    }
    return procedure;
}

Example 18 with MySqlSelectQueryBlock

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectOracleParser method statementParse.

@Override
public void statementParse(SchemaConfig schema, RouteResultset rrs, SQLStatement stmt) {
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelectQuery sqlSelectQuery = selectStmt.getSelect().getQuery();
    //从mysql解析过来
    if (sqlSelectQuery instanceof MySqlSelectQueryBlock) {
        MySqlSelectQueryBlock mysqlSelectQuery = (MySqlSelectQueryBlock) selectStmt.getSelect().getQuery();
        Limit limit = mysqlSelectQuery.getLimit();
        if (limit == null) {
            //使用oracle的解析，否则会有部分oracle语法识别错误
            OracleStatementParser oracleParser = new OracleStatementParser(getCtx().getSql());
            SQLSelectStatement oracleStmt = (SQLSelectStatement) oracleParser.parseStatement();
            selectStmt = oracleStmt;
            SQLSelectQuery oracleSqlSelectQuery = oracleStmt.getSelect().getQuery();
            if (oracleSqlSelectQuery instanceof OracleSelectQueryBlock) {
                parseNativePageSql(oracleStmt, rrs, (OracleSelectQueryBlock) oracleSqlSelectQuery, schema);
            }
        }
        if (isNeedParseOrderAgg) {
            parseOrderAggGroupMysql(schema, selectStmt, rrs, mysqlSelectQuery);
            //更改canRunInReadDB属性
            if ((mysqlSelectQuery.isForUpdate() || mysqlSelectQuery.isLockInShareMode()) && rrs.isAutocommit() == false) {
                rrs.setCanRunInReadDB(false);
            }
        }
    }
}

Example 19 with MySqlSelectQueryBlock

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectParser method changeSql.

/**
	 * 改写sql：需要加limit的加上
	 */
@Override
public void changeSql(SchemaConfig schema, RouteResultset rrs, SQLStatement stmt, LayerCachePool cachePool) throws SQLNonTransientException {
    tryRoute(schema, rrs, cachePool);
    rrs.copyLimitToNodes();
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelectQuery sqlSelectQuery = selectStmt.getSelect().getQuery();
    if (sqlSelectQuery instanceof MySqlSelectQueryBlock) {
        MySqlSelectQueryBlock mysqlSelectQuery = (MySqlSelectQueryBlock) selectStmt.getSelect().getQuery();
        int limitStart = 0;
        int limitSize = schema.getDefaultMaxLimit();
        //clear group having
        SQLSelectGroupByClause groupByClause = mysqlSelectQuery.getGroupBy();
        // Modified by winbill, 20160614, do NOT include having clause when routing to multiple nodes
        if (groupByClause != null && groupByClause.getHaving() != null && isRoutMultiNode(schema, rrs)) {
            groupByClause.setHaving(null);
        }
        Map<String, Map<String, Set<ColumnRoutePair>>> allConditions = getAllConditions();
        boolean isNeedAddLimit = isNeedAddLimit(schema, rrs, mysqlSelectQuery, allConditions);
        if (isNeedAddLimit) {
            Limit limit = new Limit();
            limit.setRowCount(new SQLIntegerExpr(limitSize));
            mysqlSelectQuery.setLimit(limit);
            rrs.setLimitSize(limitSize);
            String sql = getSql(rrs, stmt, isNeedAddLimit);
            rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, limitSize, true);
        }
        Limit limit = mysqlSelectQuery.getLimit();
        if (limit != null && !isNeedAddLimit) {
            SQLIntegerExpr offset = (SQLIntegerExpr) limit.getOffset();
            SQLIntegerExpr count = (SQLIntegerExpr) limit.getRowCount();
            if (offset != null) {
                limitStart = offset.getNumber().intValue();
                rrs.setLimitStart(limitStart);
            }
            if (count != null) {
                limitSize = count.getNumber().intValue();
                rrs.setLimitSize(limitSize);
            }
            if (isNeedChangeLimit(rrs)) {
                Limit changedLimit = new Limit();
                changedLimit.setRowCount(new SQLIntegerExpr(limitStart + limitSize));
                if (offset != null) {
                    if (limitStart < 0) {
                        String msg = "You have an error in your SQL syntax; check the manual that " + "corresponds to your MySQL server version for the right syntax to use near '" + limitStart + "'";
                        throw new SQLNonTransientException(ErrorCode.ER_PARSE_ERROR + " - " + msg);
                    } else {
                        changedLimit.setOffset(new SQLIntegerExpr(0));
                    }
                }
                mysqlSelectQuery.setLimit(changedLimit);
                String sql = getSql(rrs, stmt, isNeedAddLimit);
                rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, limitStart + limitSize, true);
                //设置改写后的sql
                ctx.setSql(sql);
            } else {
                rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), getCtx().getSql(), rrs.getLimitStart(), rrs.getLimitSize(), true);
            //	ctx.setSql(nativeSql);
            }
        }
        if (rrs.isDistTable()) {
            SQLTableSource from = mysqlSelectQuery.getFrom();
            for (RouteResultsetNode node : rrs.getNodes()) {
                SQLIdentifierExpr sqlIdentifierExpr = new SQLIdentifierExpr();
                sqlIdentifierExpr.setParent(from);
                sqlIdentifierExpr.setName(node.getSubTableName());
                SQLExprTableSource from2 = new SQLExprTableSource(sqlIdentifierExpr);
                mysqlSelectQuery.setFrom(from2);
                node.setStatement(stmt.toString());
            }
        }
        rrs.setCacheAble(isNeedCache(schema, rrs, mysqlSelectQuery, allConditions));
    }
}

Example 20 with MySqlSelectQueryBlock

use of com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock in project Mycat-Server by MyCATApache.

the class DruidSelectParser method statementParse.

@Override
public void statementParse(SchemaConfig schema, RouteResultset rrs, SQLStatement stmt) {
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelectQuery sqlSelectQuery = selectStmt.getSelect().getQuery();
    if (sqlSelectQuery instanceof MySqlSelectQueryBlock) {
        MySqlSelectQueryBlock mysqlSelectQuery = (MySqlSelectQueryBlock) selectStmt.getSelect().getQuery();
        parseOrderAggGroupMysql(schema, stmt, rrs, mysqlSelectQuery);
        //更改canRunInReadDB属性
        if ((mysqlSelectQuery.isForUpdate() || mysqlSelectQuery.isLockInShareMode()) && rrs.isAutocommit() == false) {
            rrs.setCanRunInReadDB(false);
        }
    } else if (sqlSelectQuery instanceof MySqlUnionQuery) {
    //			MySqlUnionQuery unionQuery = (MySqlUnionQuery)sqlSelectQuery;
    //			MySqlSelectQueryBlock left = (MySqlSelectQueryBlock)unionQuery.getLeft();
    //			MySqlSelectQueryBlock right = (MySqlSelectQueryBlock)unionQuery.getLeft();
    //			System.out.println();
    }
}