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select_lex class already has a join class defined. Why Because if you are executing another SELECT statement in a UNION or perhaps a reused thread from the connection pool, the select_lex class would already have been through this part of the code once and therefore we do not need to create another JOIN class. If there is no JOIN class in the select_lex class, a new one is created in the create statement join= new JOIN(). Finally, you see that the code calls the join->optimize() method. However, once again you are at another fuzzy boundary. This time, it occurs in the middle of the mysql_select() function. The next major function call in this function is the join->exec() method. But first, let s take a look at what happens in the mysql_select() method in Listing 3-11. Table 3-5 lists the source files associated with query optimization. Listing 3-11. The mysql_select() Function bool mysql_select(THD *thd, Item ***rref_pointer_array, TABLE_LIST *tables, uint wild_num, List<Item> &fields, COND *conds, uint og_num, ORDER *order, ORDER *group, Item *having, ORDER *proc_param, ulong select_options, select_result *result, SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex) { bool err; bool free_join= 1; DBUG_ENTER("mysql_select"); select_lex->context.resolve_in_select_list= TRUE; JOIN *join; if (select_lex->join != 0) { join= select_lex->join; ... join->select_options= select_options; } else { if (!(join= new JOIN(thd, fields, select_options, result))) DBUG_RETURN(TRUE); ... } if ((err= join->optimize())) { goto err; } asp.net data matrix DataMatrix . net - SourceForge
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DataMatrix . net supports encondig and decoding valid GS1 DataMatrix codes now. While decoding does not require any special settings, you ... The maximum number of characters allowed in a sheet name is 31. Only the first 26 characters of the customer name will be used. If a sheet already exists with the customer name, or the first 26 characters of the customer s name, a new sheet will be created with (2) appended to the name. after(String url, String userName, String password) returning(Connection connection) : call(Connection DBConnectionPool.getConnection(..)) && args(url, userName, password) { System.out.println("For [" + url + "," + userName + "," + password + "]" + "\n\tGot from pool: " + connection); } ... join->exec(); ... } nuget datamatrix net DataMatrix.net 0.4.2 - NuGet Gallery
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24 Nov 2013 ... See project site for more info - this is a packaging of the binaries hosted at Michael Faschinger's SourceForge site. * decode DataMatrix codes ... after(String url, String userName, String password) returning(Connection connection) : call(Connection DriverManager.getConnection(..)) && args(url, userName, password) { System.out.println("For [" + url + "," + userName + "," + password + "]" + "\n\tCreated new : " + connection); } Logging resource creation before(Connection connection) : call(* DBConnectionPool.putConnection(Connection)) && args(connection) { System.out.println("Putting in pool: " + connection + "\n"); } Logging resource relinquishing before(Connection connection) : call(* Connection.close()) && target(connection) { System.out.println("Closing: " + connection + "\n"); } Logging resource destruction The definitions for the structures used in the select functions to support the SELECT commands Contains some of the optimization functions and the implementation of the select functions You used the Show Pages feature to create a copy of your pivot table for each customer. However, sheets weren t created for all customers. .net data matrix generator DataMatrix . net / DataMatrix . net at master · msmuelle-astrumit ... - GitHub
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using DataMatrix . net ; // Add ref to DataMatrix . net .dll using System.Drawing; // Add ... Date 180310 // Purpose Get text from a DataMatrix image. The after advice to the DBConnectionPool.getConnection() method prints any attempt to get a connection from a database pool. We collect all the arguments as well as return the object to print the full information inside the advice body. Similarly, the after advice to DriverManager.getConnection() logs the creation of a new resource. The before advice to the DBConnectionPool.putConnection() method prints any attempt to put a connection into a database pool. We collect the connection argument to print the connection that was being returned. The before advice to Connection.close() prints the same information when a connection is closed. In the same way as the optimizer, the query execution uses a set of best practices for executing the query. For example, the query execution subsystem detects special clauses like ORDER BY and DISTINCT and routes control of these operations to methods designed for fast sorting and tuple elimination. Most of this activity occurs in the methods of the JOIN class. Listing 3-12 presents a condensed view of the join::exec() method. Notice that there is yet another function call to a function called by some name that includes select. Sure enough, there is another call that needs to be made to a function called do_select(). Take a look at the parameters for this function call. You are now starting to see things like field lists. Does this mean you re getting close to reading data Yes, it does. In fact, the do_select() function is a high-level wrapper for exactly that. Listing 3-12. The join::exec() Function void JOIN::exec() { List<Item> *columns_list= &fields_list; int tmp_error; DBUG_ENTER("JOIN::exec"); ... result->send_fields((procedure curr_join->procedure_fields_list : *curr_fields_list), Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF); error= do_select(curr_join, curr_fields_list, NULL, procedure); thd->limit_found_rows= curr_join->send_records; thd->examined_row_count= curr_join->examined_rows; } You would not want to use this aspect in a production environment, since it logs the usernames and passwords. In that case, if you still want to log the operations, you could just change the advice to print only the desired information. Running the test code Running the code is simple. You will have to create the database tables with users and passwords as specified in the Test.java class. Detailed instructions for setting up the test database are provided in the source code distribution (downloadable at http://www.manning.com/laddad). Alternatively, you can modify Test.java itself to suit your existing test database. After the setup is complete, simply issue the command java Test to run the program. You should see output resembling the following: datamatrix.net example Packages matching DataMatrix - NuGet Gallery
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