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Sql, Doc: tutorial modernization to the new hilighting.
This commit is contained in:
Zbigniew Rębacz
parent
7b13126b72
commit
33f582c75e
2 changed files with 405 additions and 308 deletions
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@ -18,5 +18,5 @@ CONSOLE_APP_MAIN
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Sql sql(sqlite3);
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sql.Execute("select date('now')");
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while(sql.Fetch())
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Cout() << sql[0];
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Cout() << sql[0] << '\n';
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}
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@ -21,57 +21,65 @@ topic "SQL Tutorial";
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[C2 $$20,20#70211524482531209251820423858195:class`-nested]
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[b50;2 $$21,21#03324558446220344731010354752573:Par]
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[2 $$0,0#00000000000000000000000000000000:Default]
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[{_}%EN-US
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[s2; SQL Tutorial&]
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[s3; Table of contents&]
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[s0; &]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#1^ 1. SqlSession,
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[{_}
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[s2;%% SQL Tutorial&]
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[s3;%% Table of contents&]
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[s0;%% &]
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#1^ 1. SqlSession,
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Sql, opening database connection]&]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#2^ 2. Using global
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#2^ 2. Using global
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main database, executing statements with parameters, getting
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resultset info]&]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#3^ 3. Using SqlExp]&]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#4^ 4. Schema file]&]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#5^ 5. Using schema
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#3^ 3. Using SqlExp]&]
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#4^ 4. Schema file]&]
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#5^ 5. Using schema
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file to define SqlId constants]&]
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[s0; [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#6^ 6. Using structures
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[s0;%% [^topic`:`/`/Sql`/srcdoc`/tutorial`$en`-us`#6^ 6. Using structures
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defined by schema files]&]
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[s0; &]
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[s3;:1: 1. SqlSession, Sql, opening database connection&]
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[s5; SqlSession derived objects represent database connection. Each
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SQL database (Sqlite3, Microsoft SQL, Oracle, MySQL, PostgreSQL)
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[s0;%% &]
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[s3;:1:%% 1. SqlSession, Sql, opening database connection&]
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[s5;%% SqlSession derived objects represent database connection.
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Each SQL database (Sqlite3, Microsoft SQL, Oracle, MySQL, PostgreSQL)
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has its own session class derived from SqlSession. Sql class
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is used to issue SQL statements and retrieve results:&]
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[s7; &]
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[s7; #include <Core/Core.h>&]
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[s7; #include <plugin/sqlite3/Sqlite3.h>&]
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[s7; &]
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[s7; using namespace Upp;&]
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[s7; &]
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[s7; CONSOLE`_APP`_MAIN&]
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[s7; `{&]
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[s7; -|[* Sqlite3Session ]sqlite3;&]
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[s7; -|if(!sqlite3.[* Open](ConfigFile(`"simple.db`"))) `{&]
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[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
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[s7; -|-|return;&]
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[s7; -|`}&]
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[s7; -|&]
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[s7; #ifdef `_DEBUG&]
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[s7; -|sqlite3.[* SetTrace();]&]
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[s7; #endif&]
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[s7; &]
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[s7; -|[* Sql] sql(sqlite3);&]
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[s7; -|sql.[* Execute](`"select date(`'now`')`");&]
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[s7; -|while(sql.[* Fetch]())&]
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[s7; -|-|Cout() << [* sql`[0`] ]<< `'`\n`' << ;&]
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[s7; `}&]
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[s7; &]
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[s5; In this tutorial, we are using Sqlite3 database. The connection
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[s5;%% &]
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[s7;l320; [@(128.0.255) #include][@0 ][@(0.0.255) <][@0 Core][@(0.0.255) /][@0 Core][@(0.0.255) .][@0 h
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][@(0.0.255) >]&]
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[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /][C+75 s
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qlite3][C@(0.0.255)+75 /][C+75 Sqlite3][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
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[s0;l320;C+75 &]
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[s0;l320; [*C@(0.0.255)+75 using][C+75 ][*C@(0.0.255)+75 namespace][C+75
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Upp;]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
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[s0;l320; [C+75 `{]&]
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[s0;l320; [C+75 ][*_C+75 Sqlite3Session][C+75 sqlite3;]&]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
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][*_C+75 Open][C+75 (ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
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[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
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create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
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[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
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[s0;l320; [C+75 `}]&]
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[s0;l320; [C+75 ]&]
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[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
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[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][*_C+75 SetTrace][C+75 ();]&]
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[s0;l320; [C@(128.0.255)+75 #endif]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 ][*_C+75 Sql][C+75 sql(sqlite3);]&]
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[s0;l320; [C+75 sql][C@(0.0.255)+75 .][*_C+75 Execute][C+75 (][C@3+75 `"select
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date(`'now`')`"][C+75 );]&]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][*_C+75 Fetch][C+75 ())]&]
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[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][*_C+75 sql][*_C@(0.0.255)+75 `[][*_C@3+75 0
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][*_C@(0.0.255)+75 `]][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `'][C@(0.0.255)+75 `\n][C@3+75 `'
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][C+75 ;]&]
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[s0;l320; [C+75 `}]&]
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[s5;%% &]
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[s5;%% In this tutorial, we are using Sqlite3 database. The connection
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method varies with database; in this case it is done using [* Open
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]statement.&]
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[s5; [* SetTrace ]is useful in debug mode `- all issued SQL statements
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[s5;%% [* SetTrace ]is useful in debug mode `- all issued SQL statements
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and SQL errors are logged in standard U`+`+ log.&]
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[s5; Each [* Sql] instance has to be associated to some SqlSession
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[s5;%% Each [* Sql] instance has to be associated to some SqlSession
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`- it is passed as constructor parameter (parameter`-less Sql
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constructor uses global session, more on that in section 2.).
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To execute SQL statements, use [* Execute]. If executed statement
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@ -79,56 +87,75 @@ is Select, it may return a result set, which is retrieved using
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[* Fetch]. Columns of result set are then accessed by Sql`::operator`[`]
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using index of column (starts with 0). Values are returned as
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Value type.&]
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[s5; &]
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[s3;:2: 2. Using global main database, executing statements with
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[s5;%% &]
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[s3;:2:%% 2. Using global main database, executing statements with
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parameters, getting resultset info&]
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[s5; Most applications need to work with just single database backend,
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[s5;%% Most applications need to work with just single database backend,
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therefore repeating SqlSession parameter in all Sql declarations
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would be tedious.&]
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[s5; To this end U`+`+ supports concept of `"main database`" which
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[s5;%% To this end U`+`+ supports concept of `"main database`" which
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is represented by [* SQL] variable. [* SQL] is of Sql type. When
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any other Sql variable is created with default constructor (no
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session parameter provided), it uses the same session as the
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one the SQL is bound to. To assign session to global SQL, use
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operator`=:&]
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[s7; #include <Core/Core.h>&]
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[s7; #include <plugin/sqlite3/Sqlite3.h>&]
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[s7; &]
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[s7; using namespace Upp;&]
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[s7; &]
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[s7; CONSOLE`_APP`_MAIN&]
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[s7; `{&]
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[s7; -|Sqlite3Session sqlite3;&]
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[s7; -|if(!sqlite3.Open(ConfigFile(`"simple.db`"))) `{&]
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[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
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[s7; -|-|return;&]
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[s7; -|`}&]
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[s7; -|&]
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[s7; #ifdef `_DEBUG&]
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[s7; -|sqlite3.SetTrace();&]
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[s7; #endif&]
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[s7; &]
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[s7; -|[* SQL `= ]sqlite3;&]
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[s7; -|&]
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[s7; -|[* SQL.]Execute(`"drop table TEST`");&]
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[s7; -|SQL.ClearError();&]
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[s7; -|SQL.Execute(`"create table TEST (A INTEGER, B TEXT)`");&]
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[s7; &]
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[s7; -|for(int i `= 0; i < 10; i`+`+)&]
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[s7; -|-|SQL.[* Execute](`"insert into TEST(A, B) values ([* ?], [* ?])`",
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i, AsString(3 `* i));&]
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[s7; &]
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[s7; -|Sql sql;&]
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[s7; -|sql.Execute(`"select `* from TEST`");&]
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[s7; -|for(int i `= 0; i < sql.[* GetColumns](); i`+`+)&]
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[s7; -|-|Cout() << sql.[* GetColumnInfo](i).[* name ]<< `'`\n`';&]
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[s7; -|while(sql.Fetch())&]
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[s7; -|-|Cout() << sql`[0`] << `" `\`'`" << sql`[1`] << `"`\`'`\n`";&]
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[s7; `}&]
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[s7; &]
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[s5; As global [* SQL] is regular Sql variable too, it can be used
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[s5; &]
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[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Core][C@(0.0.255)+75 /][C+75 C
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ore][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
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[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /][C+75 s
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qlite3][C@(0.0.255)+75 /][C+75 Sqlite3][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
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[s0;l320;C+75 &]
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[s0;l320; [*C@(0.0.255)+75 using][C+75 ][*C@(0.0.255)+75 namespace][C+75
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Upp;]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
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[s0;l320; [C+75 `{]&]
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[s0;l320; [C+75 Sqlite3Session sqlite3;]&]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
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][C+75 Open(ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
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[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
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create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
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[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
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[s0;l320; [C+75 `}]&]
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[s0;l320; [C+75 ]&]
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[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
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[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][C+75 SetTrace();]&]
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[s0;l320; [C@(128.0.255)+75 #endif]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 ][*_C+75 SQL][C+75 ][C@(0.0.255)+75 `=][C+75 sqlite3;]&]
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[s0;l320; [C+75 ]&]
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[s0;l320; [C+75 ][*_C+75 SQL][C@(0.0.255)+75 .][C+75 Execute(][C@3+75 `"drop
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table TEST`"][C+75 );]&]
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[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 ClearError();]&]
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[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 Execute(][C@3+75 `"create
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table TEST (A INTEGER, B TEXT)`"][C+75 );]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
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i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
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][C@3+75 10][C+75 ; i][C@(0.0.255)+75 `+`+][C+75 )]&]
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[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][*_C+75 Execute][C+75 (][C@3+75 `"insert
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into TEST(A, B) values (?, ?)`"][C+75 , i, AsString(][C@3+75 3][C+75
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][C@(0.0.255)+75 `*][C+75 i));]&]
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[s0;l320;C+75 &]
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[s0;l320; [C+75 Sql sql;]&]
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[s0;l320; [C+75 sql][C@(0.0.255)+75 .][C+75 Execute(][C@3+75 `"select
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`* from TEST`"][C+75 );]&]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
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i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
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sql][C@(0.0.255)+75 .][*_C+75 GetColumns][C+75 (); i][C@(0.0.255)+75 `+`+][C+75 )]&]
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[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 .][*_C+75 GetColu
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mnInfo(i)][*_C@(0.0.255)+75 .][*_C+75 name][C+75 ][C@(0.0.255)+75 <<][C+75
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][C@3+75 `'][C@(0.0.255)+75 `\n][C@3+75 `'][C+75 ;]&]
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[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][C+75 Fetch())]&]
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[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C@3+75 0][C@(0.0.255)+75 `]
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][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `" ][C@(0.0.255)+75 `\`'][C@3+75 `"][C+75
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][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C@3+75 1][C@(0.0.255)+75 `]][C+75
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][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"][C@(0.0.255)+75 `\`'`\n][C@3+75 `"][C+75 ;]&]
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[s0;l320; [C+75 `}]&]
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[s5;l320;%% &]
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[s5;%% As global [* SQL] is regular Sql variable too, it can be used
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to issue SQL statements.&]
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[s5; [/ Warning: While it is possible to issue ][*/ select][/ statements
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[s5;%% [/ Warning: While it is possible to issue ][*/ select][/ statements
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through ][*/ SQL][/ , based on experience this is not recommended
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`- way too often result set of ][*/ select][/ is canceled by issuing
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some other command, e.g. in routine called as part of Fetch loop.
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@ -136,246 +163,316 @@ One exception to this rule is using SQL`::operator% to fetch single
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value like ][*C@5+75 String txt `= SQL % Select(TEXT).From(DOCTEMPLATE).Where(ID
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`=`= id); ][/ (see further tutorial topics for detailed explanation
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of this code).]&]
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[s5; To get information about result set columns, you can use [* GetColumns
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[s5;%% To get information about result set columns, you can use [* GetColumns
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]to retrieve the number of columns and [* GetColumnInfo] to retrieve
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information about columns `- returns [* SqlColumnInfo] reference
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with information like name or type of column.&]
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[s5; &]
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[s3;:3: 3. Using SqlExp&]
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[s5; U`+`+ contains an unique feature, `"SqlExp`". This is a mechanism
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[s5;%% &]
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[s3;:3:%% 3. Using SqlExp&]
|
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[s5;%% U`+`+ contains an unique feature, `"SqlExp`". This is a mechanism
|
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where you construct SQL statements as C`+`+ expressions (using
|
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heavily overloaded operators).&]
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[s5; There are three advantages to this approach:&]
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[s5;l160;i150;O0; SQL statements are at least partially checked at
|
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compile time&]
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[s5;l160;i150;O0; As such statements are yet to be interpreted, it
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is possible to hide some differences between DB engines&]
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[s5;l160;i150;O0; It is much easier to create complex dynamic SQL
|
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[s5;%% There are three advantages to this approach:&]
|
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[s5;l160;i150;O0;%% SQL statements are at least partially checked
|
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at compile time&]
|
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[s5;l160;i150;O0;%% As such statements are yet to be interpreted,
|
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it is possible to hide some differences between DB engines&]
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[s5;l160;i150;O0;%% It is much easier to create complex dynamic SQL
|
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statements&]
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[s5; Database entity identifiers (like table or column names) can
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[s5;%% Database entity identifiers (like table or column names) can
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be defined as [* SqlId] type. For the complete lest of supported
|
||||
SQL statements, see [^topic`:`/`/Sql`/src`/SqlExp`$en`-us^ SqlExp
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||||
in examples].&]
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[s7; #include <Core/Core.h>&]
|
||||
[s7; #include <plugin/sqlite3/Sqlite3.h>&]
|
||||
[s7; &]
|
||||
[s7; using namespace Upp;&]
|
||||
[s7; &]
|
||||
[s7; CONSOLE`_APP`_MAIN&]
|
||||
[s7; `{&]
|
||||
[s7; -|Sqlite3Session sqlite3;&]
|
||||
[s7; -|if(!sqlite3.Open(ConfigFile(`"simple.db`"))) `{&]
|
||||
[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
|
||||
[s7; -|-|return;&]
|
||||
[s7; -|`}&]
|
||||
[s7; -|&]
|
||||
[s7; #ifdef `_DEBUG&]
|
||||
[s7; -|sqlite3.SetTrace();&]
|
||||
[s7; #endif&]
|
||||
[s7; &]
|
||||
[s7; -|SQL `= sqlite3;&]
|
||||
[s7; -|&]
|
||||
[s7; -|SQL.Execute(`"drop table TEST`");&]
|
||||
[s7; -|SQL.ClearError();&]
|
||||
[s7; -|SQL.Execute(`"create table TEST (A INTEGER, B TEXT)`");&]
|
||||
[s7; &]
|
||||
[s7; -|[* SqlId] A(`"A`"), B(`"B`"), TEST(`"TEST`");&]
|
||||
[s7; &]
|
||||
[s7; -|for(int i `= 0; i < 10; i`+`+)&]
|
||||
[s7; -|-|SQL [* `* Insert(TEST)(A, ]i[* )(B, ]AsString(3 `* i)[* );]&]
|
||||
[s7; &]
|
||||
[s7; -|Sql sql;&]
|
||||
[s7; -|sql [* `* Select(A, B).From(TEST);]&]
|
||||
[s7; -|while(sql.Fetch())&]
|
||||
[s7; -|-|Cout() << [* sql`[A`]] << `" `\`'`" << [* sql`[B`]] << `"`\`'`\n`";&]
|
||||
[s7; `}&]
|
||||
[s7; &]
|
||||
[s5; SqlId identifiers can be also used as parameter of Sql`::operator`[`]
|
||||
[s5;%% &]
|
||||
[s7;l320; [@(128.0.255) #include][@0 ][@(0.0.255) <][@0 Core][@(0.0.255) /][@0 Core][@(0.0.255) .][@0 h
|
||||
][@(0.0.255) >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /][C+75 s
|
||||
qlite3][C@(0.0.255)+75 /][C+75 Sqlite3][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*C@(0.0.255)+75 using][C+75 ][*C@(0.0.255)+75 namespace][C+75
|
||||
Upp;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
|
||||
[s0;l320; [C+75 `{]&]
|
||||
[s0;l320; [C+75 Sqlite3Session sqlite3;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
|
||||
][C+75 Open(ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
|
||||
create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s0;l320; [C+75 ]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
|
||||
[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][C+75 SetTrace();]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `=][C+75 sqlite3;]&]
|
||||
[s0;l320; [C+75 ]&]
|
||||
[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 Execute(][C@3+75 `"drop table
|
||||
TEST`"][C+75 );]&]
|
||||
[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 ClearError();]&]
|
||||
[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 Execute(][C@3+75 `"create
|
||||
table TEST (A INTEGER, B TEXT)`"][C+75 );]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*_C+75 SqlId][C+75 A(][C@3+75 `"A`"][C+75 ), B(][C@3+75 `"B`"][C+75 ),
|
||||
TEST(][C@3+75 `"TEST`"][C+75 );]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
|
||||
i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
|
||||
][C@3+75 10][C+75 ; i][C@(0.0.255)+75 `+`+][C+75 )]&]
|
||||
[s0;l320; [C+75 SQL ][*_C@(0.0.255)+75 `*][*_C+75 Insert(TEST)(A,
|
||||
i)(B, AsString(][*_C@3+75 3][*_C+75 ][*_C@(0.0.255)+75 `*][*_C+75 i))][C+75 ;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 Sql sql;]&]
|
||||
[s0;l320; [C+75 sql ][*_C@(0.0.255)+75 `*][*_C+75 Select(A, B)][*_C@(0.0.255)+75 .][*_C+75 F
|
||||
rom(TEST)][C+75 ;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][C+75 Fetch())]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][*_C+75 sql][*_C@(0.0.255)+75 `[][*_C+75 A
|
||||
][*_C@(0.0.255)+75 `]][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `" ][C@(0.0.255)+75 `\`'][C@3+75 `"
|
||||
][C+75 ][C@(0.0.255)+75 <<][C+75 ][*_C+75 sql][*_C@(0.0.255)+75 `[][*_C+75 B][*_C@(0.0.255)+75 `]
|
||||
][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"][C@(0.0.255)+75 `\`'`\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s5;l320; &]
|
||||
[s5;%% SqlId identifiers can be also used as parameter of Sql`::operator`[`]
|
||||
to retrieve particular columns of result`-set.&]
|
||||
[s5; &]
|
||||
[s3;:4: 4. Schema file&]
|
||||
[s5; Schema files can be used to describe the database schema. Such
|
||||
schema files can be used to upload the schema to the database,
|
||||
[s5;%% &]
|
||||
[s3;:4:%% 4. Schema file&]
|
||||
[s5;%% Schema files can be used to describe the database schema.
|
||||
Such schema files can be used to upload the schema to the database,
|
||||
to defined SqlId constants and also to work with database records
|
||||
as C`+`+ structures.&]
|
||||
[s5; Following example demonstrates using schema file to create database
|
||||
schema in SQL database server.&]
|
||||
[s5; MyApp.sch:&]
|
||||
[s7; &]
|
||||
[s7; [* TABLE(TEST)]&]
|
||||
[s7; [* -|INT (A)]&]
|
||||
[s7; [* -|STRING (B, 200)]&]
|
||||
[s7; [* END`_TABLE]&]
|
||||
[s7; &]
|
||||
[s5; MyApp.h&]
|
||||
[s7; #ifndef `_MyApp`_h`_&]
|
||||
[s7; #define `_MyApp`_h`_&]
|
||||
[s7; &]
|
||||
[s7; #include <Core/Core.h>&]
|
||||
[s7; #include <plugin/sqlite3/Sqlite3.h>&]
|
||||
[s7; &]
|
||||
[s7; using namespace Upp;&]
|
||||
[s7; &]
|
||||
[s7; [* #define SCHEMADIALECT <plugin/sqlite3/Sqlite3Schema.h>]&]
|
||||
[s7; [* #define MODEL <Sql04/MyApp.sch>]&]
|
||||
[s7; [* #include `"Sql/sch`_header.h`"]&]
|
||||
[s7; &]
|
||||
[s7; #endif&]
|
||||
[s7;* &]
|
||||
[s5; main.cpp&]
|
||||
[s7; #include `"MyApp.h`"&]
|
||||
[s7; &]
|
||||
[s7; [* #include <Sql/sch`_schema.h>]&]
|
||||
[s7; [* #include <Sql/sch`_source.h>]&]
|
||||
[s7; &]
|
||||
[s7; CONSOLE`_APP`_MAIN&]
|
||||
[s7; `{&]
|
||||
[s7; -|Sqlite3Session sqlite3;&]
|
||||
[s7; -|if(!sqlite3.Open(ConfigFile(`"simple.db`"))) `{&]
|
||||
[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
|
||||
[s7; -|-|return;&]
|
||||
[s7; -|`}&]
|
||||
[s7; -|&]
|
||||
[s7; #ifdef `_DEBUG&]
|
||||
[s7; -|sqlite3.SetTrace();&]
|
||||
[s7; #endif&]
|
||||
[s7; &]
|
||||
[s7; -|SQL `= sqlite3;&]
|
||||
[s7; &]
|
||||
[s7; [* -|SqlSchema sch(SQLITE3);]&]
|
||||
[s7; [* -|All`_Tables(sch);]&]
|
||||
[s7; [* -|SqlPerformScript(sch.Upgrade());]&]
|
||||
[s7; [* -|SqlPerformScript(sch.Attributes());]&]
|
||||
[s7; [* -|SQL.ClearError();]&]
|
||||
[s7; &]
|
||||
[s7; -|SqlId A(`"A`"), B(`"B`"), TEST(`"TEST`");&]
|
||||
[s7; &]
|
||||
[s7; -|for(int i `= 0; i < 10; i`+`+)&]
|
||||
[s7; -|-|SQL `* Insert(TEST)(A, i)(B, AsString(3 `* i));&]
|
||||
[s7; &]
|
||||
[s7; -|Sql sql;&]
|
||||
[s7; -|sql `* Select(A, B).From(TEST);&]
|
||||
[s7; -|while(sql.Fetch())&]
|
||||
[s7; -|-|Cout() << sql`[A`] << `" `\`'`" << sql`[B`] << `"`\`'`\n`";&]
|
||||
[s7; `}&]
|
||||
[s7;* &]
|
||||
[s5; &]
|
||||
[s3;:5: 5. Using schema file to define SqlId constants&]
|
||||
[s5; As names of columns are present in the database schema, it is
|
||||
natural to recycle them to create SqlId constants.&]
|
||||
[s5; However, due to C`+`+ one definition rule (.sch files are interpreted
|
||||
as C`+`+ sources, using changing set of macros), you have to
|
||||
mark identifiers using underscore:&]
|
||||
[s5; MyApp.sch:&]
|
||||
[s7; [* TABLE`_](TEST)&]
|
||||
[s7; -|[* INT`_] (A)&]
|
||||
[s7; -|[* STRING`_] (B, 200)&]
|
||||
[s7; END`_TABLE&]
|
||||
[s7; &]
|
||||
[s7; TABLE`_(TEST2)&]
|
||||
[s7; -|[* INT] (A)&]
|
||||
[s7; -|[* STRING] (B, 200)&]
|
||||
[s7; END`_TABLE&]
|
||||
[s5; &]
|
||||
[s5; MyApp.h:&]
|
||||
[s7; #ifndef `_MyApp`_h`_&]
|
||||
[s7; #define `_MyApp`_h`_&]
|
||||
[s7; &]
|
||||
[s7; #include <Core/Core.h>&]
|
||||
[s7; #include <plugin/sqlite3/Sqlite3.h>&]
|
||||
[s7; &]
|
||||
[s7; using namespace Upp;&]
|
||||
[s7; &]
|
||||
[s7; #define SCHEMADIALECT <plugin/sqlite3/Sqlite3Schema.h>&]
|
||||
[s7; #define MODEL <Sql05/MyApp.sch>&]
|
||||
[s7; #include `"Sql/sch`_header.h`"&]
|
||||
[s7; &]
|
||||
[s7; #endif&]
|
||||
[s7; &]
|
||||
[s5; main.cpp:&]
|
||||
[s7; #include `"MyApp.h`"&]
|
||||
[s7; &]
|
||||
[s7; #include <Sql/sch`_schema.h>&]
|
||||
[s7; #include <Sql/sch`_source.h>&]
|
||||
[s7; &]
|
||||
[s7; CONSOLE`_APP`_MAIN&]
|
||||
[s7; `{&]
|
||||
[s7; -|Sqlite3Session sqlite3;&]
|
||||
[s7; -|if(!sqlite3.Open(ConfigFile(`"simple.db`"))) `{&]
|
||||
[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
|
||||
[s7; -|-|return;&]
|
||||
[s7; -|`}&]
|
||||
[s7; -|&]
|
||||
[s7; #ifdef `_DEBUG&]
|
||||
[s7; -|sqlite3.SetTrace();&]
|
||||
[s7; #endif&]
|
||||
[s7; &]
|
||||
[s7; -|SQL `= sqlite3;&]
|
||||
[s7; &]
|
||||
[s7; -|SqlSchema sch(SQLITE3);&]
|
||||
[s7; -|All`_Tables(sch);&]
|
||||
[s7; -|SqlPerformScript(sch.Upgrade());&]
|
||||
[s7; -|SqlPerformScript(sch.Attributes());&]
|
||||
[s7; -|SQL.ClearError();&]
|
||||
[s7; &]
|
||||
[s7; -|for(int i `= 0; i < 10; i`+`+)&]
|
||||
[s7; -|-|SQL `* Insert(TEST)(A, i)(B, AsString(3 `* i));&]
|
||||
[s7; &]
|
||||
[s7; -|Sql sql;&]
|
||||
[s7; -|sql `* Select(A, B).From(TEST);&]
|
||||
[s7; -|while(sql.Fetch())&]
|
||||
[s7; -|-|Cout() << sql`[A`] << `" `\`'`" << sql`[B`] << `"`\`'`\n`";&]
|
||||
[s7; `}&]
|
||||
[s7; &]
|
||||
[s5; &]
|
||||
[s3;:6: 6. Using structures defined by schema files&]
|
||||
[s5; Schema files also define structures that can be used to fetch,
|
||||
[s5;%% Following example demonstrates using schema file to create
|
||||
database schema in SQL database server.&]
|
||||
[s5;%% [/ MyApp.sch:]&]
|
||||
[s5;%% &]
|
||||
[s0;l320; [*C@(0.0.255)+75 TABLE][C+75 (TEST)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 INT][C+75 (A)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 STRING][C+75 (B, ][C@3+75 200][C+75 )]&]
|
||||
[s0;l320; [*C@(0.0.255)+75 END][C@(0.0.255)+75 `_][*C@(0.0.255)+75 TABLE]&]
|
||||
[s5;%% &]
|
||||
[s5;%% [/ MyApp.h:]&]
|
||||
[s5;/%% &]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifndef][C+75 `_MyApp`_h`_]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #define][C+75 `_MyApp`_h`_]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Core][C@(0.0.255)+75 /][C+75 C
|
||||
ore][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /][C+75 s
|
||||
qlite3][C@(0.0.255)+75 /][C+75 Sqlite3][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*C@(0.0.255)+75 using][C+75 ][*C@(0.0.255)+75 namespace][C+75
|
||||
Upp;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*_C@(128.0.255)+75 #define][*_C+75 SCHEMADIALECT ][*_C@(0.0.255)+75 <][*_C+75 plu
|
||||
gin][*_C@(0.0.255)+75 /][*_C+75 sqlite3][*_C@(0.0.255)+75 /][*_C+75 Sqlite3Schema][*_C@(0.0.255)+75 .
|
||||
][*_C+75 h][*_C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [*_C@(128.0.255)+75 #define][*_C+75 MODEL ][*_C@(0.0.255)+75 <][*_C+75 Sql04][*_C@(0.0.255)+75 /
|
||||
][*_C+75 MyApp][*_C@(0.0.255)+75 .][*_C+75 sch][*_C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [*_C@(128.0.255)+75 #include][*_C+75 ][*_C@3+75 `"Sql/sch`_header.h`"]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s5;%% &]
|
||||
[s5;%% [/ main.cpp:]&]
|
||||
[s5;/%% &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@3+75 `"MyApp.h`"]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*_C@(128.0.255)+75 #include][*_C+75 ][*_C@(0.0.255)+75 <][*_C+75 Sql][*_C@(0.0.255)+75 /
|
||||
][*_C+75 sch`_schema][*_C@(0.0.255)+75 .][*_C+75 h][*_C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [*_C@(128.0.255)+75 #include][*_C+75 ][*_C@(0.0.255)+75 <][*_C+75 Sql][*_C@(0.0.255)+75 /
|
||||
][*_C+75 sch`_source][*_C@(0.0.255)+75 .][*_C+75 h][*_C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
|
||||
[s0;l320; [C+75 `{]&]
|
||||
[s0;l320; [C+75 Sqlite3Session sqlite3;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
|
||||
][C+75 Open(ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
|
||||
create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s0;l320; [C+75 ]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
|
||||
[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][C+75 SetTrace();]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `=][C+75 sqlite3;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*_C+75 SqlSchema sch(SQLITE3);]&]
|
||||
[s0;l320; [C+75 ][*_C+75 All`_Tables(sch);]&]
|
||||
[s0;l320; [C+75 ][*_C+75 SqlPerformScript(sch][*_C@(0.0.255)+75 .][*_C+75 Upgrade());]&]
|
||||
[s0;l320; [C+75 ][*_C+75 SqlPerformScript(sch][*_C@(0.0.255)+75 .][*_C+75 Attributes());]&]
|
||||
[s0;l320; [C+75 ][*_C+75 SQL][*_C@(0.0.255)+75 .][*_C+75 ClearError();]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SqlId A(][C@3+75 `"A`"][C+75 ), B(][C@3+75 `"B`"][C+75 ),
|
||||
TEST(][C@3+75 `"TEST`"][C+75 );]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
|
||||
i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
|
||||
][C@3+75 10][C+75 ; i][C@(0.0.255)+75 `+`+][C+75 )]&]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `*][C+75 Insert(TEST)(A,
|
||||
i)(B, AsString(][C@3+75 3][C+75 ][C@(0.0.255)+75 `*][C+75 i));]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 Sql sql;]&]
|
||||
[s0;l320; [C+75 sql ][C@(0.0.255)+75 `*][C+75 Select(A, B)][C@(0.0.255)+75 .][C+75 From(TE
|
||||
ST);]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][C+75 Fetch())]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C+75 A][C@(0.0.255)+75 `]
|
||||
][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `" ][C@(0.0.255)+75 `\`'][C@3+75 `"][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C+75 B][C@(0.0.255)+75 `]][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"][C@(0.0.255)+75 `\`'`\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s5;%% &]
|
||||
[s3;:5:%% 5. Using schema file to define SqlId constants&]
|
||||
[s5;%% As names of columns are present in the database schema, it
|
||||
is natural to recycle them to create SqlId constants.&]
|
||||
[s5;%% However, due to C`+`+ one definition rule (.sch files are
|
||||
interpreted as C`+`+ sources, using changing set of macros),
|
||||
you have to mark identifiers using underscore:&]
|
||||
[s5;%% [/ MyApp.sch:]&]
|
||||
[s5;/%% &]
|
||||
[s0;l320; [*C@(0.0.255)+75 TABLE][C@(0.0.255)+75 `_][C+75 (TEST)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 INT][C@(0.0.255)+75 `_][C+75
|
||||
(A)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 STRING][C@(0.0.255)+75 `_][C+75
|
||||
(B, ][C@3+75 200][C+75 )]&]
|
||||
[s0;l320; [*C@(0.0.255)+75 END][C@(0.0.255)+75 `_][*C@(0.0.255)+75 TABLE]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*C@(0.0.255)+75 TABLE][C@(0.0.255)+75 `_][C+75 (TEST2)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 INT][C+75 (A)]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 STRING][C+75 (B, ][C@3+75 200][C+75 )]&]
|
||||
[s0;l320; [*C@(0.0.255)+75 END][C@(0.0.255)+75 `_][*C@(0.0.255)+75 TABLE]&]
|
||||
[s5;%% &]
|
||||
[s5;%% MyApp.h:&]
|
||||
[s5;%% &]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifndef][C+75 `_MyApp`_h`_]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #define][C+75 `_MyApp`_h`_]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Core][C@(0.0.255)+75 /][C+75 C
|
||||
ore][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /][C+75 s
|
||||
qlite3][C@(0.0.255)+75 /][C+75 Sqlite3][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [*C@(0.0.255)+75 using][C+75 ][*C@(0.0.255)+75 namespace][C+75
|
||||
Upp;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #define][C+75 SCHEMADIALECT ][C@(0.0.255)+75 <][C+75 plugin][C@(0.0.255)+75 /
|
||||
][C+75 sqlite3][C@(0.0.255)+75 /][C+75 Sqlite3Schema][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >
|
||||
]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #define][C+75 MODEL ][C@(0.0.255)+75 <][C+75 Sql05][C@(0.0.255)+75 /
|
||||
][C+75 MyApp][C@(0.0.255)+75 .][C+75 sch][C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@3+75 `"Sql/sch`_header.h`"]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s5;%% &]
|
||||
[s5;%% main.cpp:&]
|
||||
[s5;%% &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@3+75 `"MyApp.h`"]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Sql][C@(0.0.255)+75 /][C+75 s
|
||||
ch`_schema][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Sql][C@(0.0.255)+75 /][C+75 s
|
||||
ch`_source][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
|
||||
[s0;l320; [C+75 `{]&]
|
||||
[s0;l320; [C+75 Sqlite3Session sqlite3;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
|
||||
][C+75 Open(ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
|
||||
create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s0;l320; [C+75 ]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
|
||||
[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][C+75 SetTrace();]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `=][C+75 sqlite3;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SqlSchema sch(SQLITE3);]&]
|
||||
[s0;l320; [C+75 All`_Tables(sch);]&]
|
||||
[s0;l320; [C+75 SqlPerformScript(sch][C@(0.0.255)+75 .][C+75 Upgrade());]&]
|
||||
[s0;l320; [C+75 SqlPerformScript(sch][C@(0.0.255)+75 .][C+75 Attributes());]&]
|
||||
[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 ClearError();]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
|
||||
i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
|
||||
][C@3+75 10][C+75 ; i][C@(0.0.255)+75 `+`+][C+75 )]&]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `*][C+75 Insert(TEST)(A,
|
||||
i)(B, AsString(][C@3+75 3][C+75 ][C@(0.0.255)+75 `*][C+75 i));]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 Sql sql;]&]
|
||||
[s0;l320; [C+75 sql ][C@(0.0.255)+75 `*][C+75 Select(A, B)][C@(0.0.255)+75 .][C+75 From(TE
|
||||
ST);]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][C+75 Fetch())]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C+75 A][C@(0.0.255)+75 `]
|
||||
][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `" ][C@(0.0.255)+75 `\`'][C@3+75 `"][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 sql][C@(0.0.255)+75 `[][C+75 B][C@(0.0.255)+75 `]][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"][C@(0.0.255)+75 `\`'`\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s5;%% &]
|
||||
[s3;:6:%% 6. Using structures defined by schema files&]
|
||||
[s5;%% Schema files also define structures that can be used to fetch,
|
||||
insert or update database records. Names of such structures are
|
||||
identical to the names of tables, with [* S`_] prefix:&]
|
||||
[s7; #include `"MyApp.h`"&]
|
||||
[s7; &]
|
||||
[s7; #include <Sql/sch`_schema.h>&]
|
||||
[s7; #include <Sql/sch`_source.h>&]
|
||||
[s7; &]
|
||||
[s7; CONSOLE`_APP`_MAIN&]
|
||||
[s7; `{&]
|
||||
[s7; -|Sqlite3Session sqlite3;&]
|
||||
[s7; -|if(!sqlite3.Open(ConfigFile(`"simple.db`"))) `{&]
|
||||
[s7; -|-|Cout() << `"Can`'t create or open database file`\n`";&]
|
||||
[s7; -|-|return;&]
|
||||
[s7; -|`}&]
|
||||
[s7; -|&]
|
||||
[s7; #ifdef `_DEBUG&]
|
||||
[s7; -|sqlite3.SetTrace();&]
|
||||
[s7; #endif&]
|
||||
[s7; &]
|
||||
[s7; -|SQL `= sqlite3;&]
|
||||
[s7; &]
|
||||
[s7; -|SqlSchema sch(SQLITE3);&]
|
||||
[s7; -|All`_Tables(sch);&]
|
||||
[s7; -|SqlPerformScript(sch.Upgrade());&]
|
||||
[s7; -|SqlPerformScript(sch.Attributes());&]
|
||||
[s7; -|SQL.ClearError();&]
|
||||
[s7; &]
|
||||
[s7; -|[* S`_TEST] x;&]
|
||||
[s7; -|for(int i `= 0; i < 10; i`+`+) `{&]
|
||||
[s7; -|-|[* x.A `= i;]&]
|
||||
[s7; -|-|[* x.B `= AsString(3 `* i);]&]
|
||||
[s7; -|-|[* SQL `* Insert(x);]&]
|
||||
[s7; -|`}&]
|
||||
[s7; &]
|
||||
[s7; -|Sql sql;&]
|
||||
[s7; -|sql `* Select([* x]).From(TEST);&]
|
||||
[s7; -|while(sql.Fetch([* x]))&]
|
||||
[s7; -|-|Cout() << [* x.A] << `" `\`'`" << [* x.B] << `"`\`'`\n`";&]
|
||||
[s7; `}&]
|
||||
[s5; &]
|
||||
[s3; Recommended tutorials:&]
|
||||
[s5; If you want to learn more, we have several tutorials that you
|
||||
can find useful:&]
|
||||
[s5;l160;i150;O0;~~~0; [^topic`:`/`/Skylark`/srcdoc`/Tutorial`_en`-us^ Skylark]
|
||||
[s5;%% &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@3+75 `"MyApp.h`"]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Sql][C@(0.0.255)+75 /][C+75 s
|
||||
ch`_schema][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #include][C+75 ][C@(0.0.255)+75 <][C+75 Sql][C@(0.0.255)+75 /][C+75 s
|
||||
ch`_source][C@(0.0.255)+75 .][C+75 h][C@(0.0.255)+75 >]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 CONSOLE`_APP`_MAIN]&]
|
||||
[s0;l320; [C+75 `{]&]
|
||||
[s0;l320; [C+75 Sqlite3Session sqlite3;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 if][C+75 (][C@(0.0.255)+75 !][C+75 sqlite3][C@(0.0.255)+75 .
|
||||
][C+75 Open(ConfigFile(][C@3+75 `"simple.db`"][C+75 ))) `{]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"Can`'t
|
||||
create or open database file][C@(0.0.255)+75 `\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 ][*_C@(128.0.255)+75 return][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s0;l320; [C+75 ]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #ifdef][C+75 `_DEBUG]&]
|
||||
[s0;l320; [C+75 sqlite3][C@(0.0.255)+75 .][C+75 SetTrace();]&]
|
||||
[s0;l320; [C@(128.0.255)+75 #endif]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SQL ][C@(0.0.255)+75 `=][C+75 sqlite3;]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 SqlSchema sch(SQLITE3);]&]
|
||||
[s0;l320; [C+75 All`_Tables(sch);]&]
|
||||
[s0;l320; [C+75 SqlPerformScript(sch][C@(0.0.255)+75 .][C+75 Upgrade());]&]
|
||||
[s0;l320; [C+75 SqlPerformScript(sch][C@(0.0.255)+75 .][C+75 Attributes());]&]
|
||||
[s0;l320; [C+75 SQL][C@(0.0.255)+75 .][C+75 ClearError();]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 ][*_C+75 S`_TEST x;]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 for][C+75 (][*C@(0.0.255)+75 int][C+75
|
||||
i ][C@(0.0.255)+75 `=][C+75 ][C@3+75 0][C+75 ; i ][C@(0.0.255)+75 <][C+75
|
||||
][C@3+75 10][C+75 ; i][C@(0.0.255)+75 `+`+][C+75 ) `{]&]
|
||||
[s0;l320; [C+75 ][*_C+75 x][*_C@(0.0.255)+75 .][*_C+75 A ][*_C@(0.0.255)+75 `=][*_C+75
|
||||
i;]&]
|
||||
[s0;l320; [C+75 ][*_C+75 x][*_C@(0.0.255)+75 .][*_C+75 B ][*_C@(0.0.255)+75 `=][*_C+75
|
||||
AsString(][*_C@3+75 3][*_C+75 ][*_C@(0.0.255)+75 `*][*_C+75 i);]&]
|
||||
[s0;l320; [C+75 ][*_C+75 SQL ][*_C@(0.0.255)+75 `*][*_C+75 Insert(x);]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s0;l320;C+75 &]
|
||||
[s0;l320; [C+75 Sql sql;]&]
|
||||
[s0;l320; [C+75 sql ][C@(0.0.255)+75 `*][C+75 Select(][*_C+75 x][C+75 )][C@(0.0.255)+75 .][C+75 F
|
||||
rom(TEST);]&]
|
||||
[s0;l320; [C+75 ][*C@(0.0.255)+75 while][C+75 (sql][C@(0.0.255)+75 .][C+75 Fetch(][*_C+75 x][C+75 )
|
||||
)]&]
|
||||
[s0;l320; [C+75 Cout() ][C@(0.0.255)+75 <<][C+75 ][*_C+75 x][*_C@(0.0.255)+75 .][*_C+75 A
|
||||
][C+75 ][C@(0.0.255)+75 <<][C+75 ][C@3+75 `" ][C@(0.0.255)+75 `\`'][C@3+75 `"][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 ][*_C+75 x][*_C@(0.0.255)+75 .][*_C+75 B][C+75
|
||||
][C@(0.0.255)+75 <<][C+75 ][C@3+75 `"][C@(0.0.255)+75 `\`'`\n][C@3+75 `"][C+75 ;]&]
|
||||
[s0;l320; [C+75 `}]&]
|
||||
[s5;l320;%% &]
|
||||
[s3;%% Recommended tutorials:&]
|
||||
[s5;%% If you want to learn more, we have several tutorials that
|
||||
you can find useful:&]
|
||||
[s5;l160;i150;O0;~~~0;%% [^topic`:`/`/Skylark`/srcdoc`/Tutorial`_en`-us^ Skylark]
|
||||
`- now you know everything about databases `- why not to use
|
||||
your knowledge to become web development star?&]
|
||||
[s5;l160;i150;O0;~~~0; [^topic`:`/`/Core`/srcdoc`/Tutorial`_en`-us^ U`+`+
|
||||
[s5;l160;i150;O0;~~~0;%% [^topic`:`/`/Core`/srcdoc`/Tutorial`_en`-us^ U`+`+
|
||||
Core value types] `- still not very confident with U`+`+. In
|
||||
this tutorial you will learn basics.]]
|
||||
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