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Sql, Doc: tutorial modernization to the new hilighting.

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Zbigniew Rębacz 2023-10-01 12:57:10 +02:00
parent 7b13126b72
commit 33f582c75e
2 changed files with 405 additions and 308 deletions
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2
tutorial/Sql01/main.cpp
View file

@ -18,5 +18,5 @@ CONSOLE_APP_MAIN
Sql sql(sqlite3); Sql sql(sqlite3);
sql.Execute("select date('now')"); sql.Execute("select date('now')");
while(sql.Fetch()) while(sql.Fetch())
Cout() << sql[0]; Cout() << sql[0] << '\n';
} }

711
uppsrc/Sql/srcdoc.tpp/tutorial_en-us.tpp
View file

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