.reference

git-svn-id: svn://ultimatepp.org/upp/trunk@14459 f0d560ea-af0d-0410-9eb7-867de7ffcac7

reference/SQL_MultiDB/SQL_MultiDB.upp

@@ -6,9 +6,10 @@ uses
 	plugin/sqlite3;
 
 file
+	multidb.h,
 	mysql_schema.sch,
 	sqlite3_schema.sch,
-	multidb.h,
+	db2schema.cpp,
 	main.cpp;
 
 mainconfig

reference/SQL_MultiDB/db2schema.cpp

@@ -0,0 +1,17 @@
+#include "multidb.h"
+
+namespace DB2 {
+
+#define SCHEMADIALECT <plugin/sqlite3/Sqlite3Schema.h>
+#define MODEL <SQL_MultiDB/sqlite3_schema.sch>
+#include <Sql/sch_source.h>
+#include <Sql/sch_schema.h>
+#undef MODEL
+#undef SCHEMADIALECT
+
+void DB2_All_Tables(SqlSchema& sch)
+{ // we need a distinct name for second database schema creation function
+	All_Tables(sch);
+}
+
+};

reference/SQL_MultiDB/main.cpp

@@ -1,55 +1,62 @@
-#include <MySql/MySql.h>
-
-using namespace Upp;
+#include "multidb.h"
 
 #define SCHEMADIALECT <MySql/MySqlSchema.h>
 #define MODEL <SQL_MultiDB/mysql_schema.sch>
-#include <Sql/sch_source.h> // creates the code for mapping schema structures to database rows
+#include <Sql/sch_source.h> // creates the code for mapping schema structures to database rows and SqlIds
 #include <Sql/sch_schema.h> // creates the code to generate sql scripts that upload schema to DB
+#undef MODEL
 #undef SCHEMADIALECT
 
-namespace DB2 {
-#define SCHEMADIALECT <plugin/sqlite3/Sqlite3Schema.h>
-#define MODEL <SQL_MultiDB/sqlite3_schema.sch>
-#include <Sql/sch_source.h>
-#include <Sql/sch_schema.h>
-#undef SCHEMADIALECT
-}
-
 CONSOLE_APP_MAIN
 {
+	StdLogSetup(LOG_COUT|LOG_FILE);
+
 	Sqlite3Session sqlite3;
 	MySqlSession mysql;
 	// edit the connection parameters if necessary
-	if(mysql.Connect("root", "Passw0rd", "test")) {
-		Cout() << "Connected\n";
-		SQL = mysql;
-		
+	if(!mysql.Connect("root", "Passw0rd", "test")) {
+		LOG("Failed to connect MySQL!");
+		Exit(1);
+	}
+	mysql.SetTrace();
+
+	if(!sqlite3.Open(ConfigFile("test.db"))) {
+		LOG("Failed to connect Sqlite3!");
+		Exit(1);
+	}
+	sqlite3.SetTrace();
+
+	SQL = mysql; // MySql will be our default database
+	
+	{ // Create/Upgrade DB schema in MySql
 		SqlSchema sch(MY_SQL);
 		All_Tables(sch);
-		// create the table if necessary
 		SqlPerformScript(sch.Upgrade());
 		SqlPerformScript(sch.Attributes());
 		SQL.ClearError();
-		
-		try {
-			// insert some random data
-			SQL & Insert(TEST_TABLE)(VALUE, Uuid::Create().ToString());
-			// fetch some data
-			Sql sql;
-			sql * Select(ID, VALUE).From(TEST_TABLE)
-			                       .OrderBy(Descending(ID))
-			                       .Limit(5);
-			while(sql.Fetch())
-				Cout() << AsString(sql[0]) << ": " << AsString(sql[VALUE]) << "\n";
-		}
-		catch(SqlExc &ex) {
-			Cerr() << "ERROR: " << ex << "\n";
-			SetExitCode(1);
-		}
 	}
-	else {
-		Cerr() <<"ERROR: Unable to connect to database\n";
-		SetExitCode(1);
+
+	{ // Create/Upgrade DB schema in Sqlite3
+		SqlSchema sch(SQLITE3);
+		DB2::DB2_All_Tables(sch);
+		SqlPerformScript(sqlite3, sch.Upgrade());
+		SqlPerformScript(sqlite3, sch.Attributes());
+		SQL.ClearError();
+	}
+
+	{ // Do something with MySql
+		SQL * Insert(TEST_TABLE)(VALUE, FormatIntBase(Random(), 36));
+		Sql sql;
+		sql * Select(ID, VALUE).From(TEST_TABLE);
+		while(sql.Fetch())
+			LOG("ID: " << sql[ID] << ", VALUE: " << sql[VALUE]);
+	}
+
+	{ // Do something with Sqlite3; ID and VALUE SqlIds are from mysql schema, but these are just text, so no problem
+		Sql sql(sqlite3); // need to specify non-default session in the constructor!
+		sql * Insert(TEST_TABLE)(VALUE, FormatIntBase(Random(), 36))(DB2::NAME, AsString(Random()));
+		sql * Select(ID, VALUE, DB2::NAME).From(DB2::TEST_TABLE); // the value of DB2::TEST_TABLE and TEST_TABLE is the same, using DB2:: here just for demonstration
+		while(sql.Fetch())
+			LOG("ID: " << sql[ID] << ", VALUE: " << sql[VALUE] << ", NAME: " << sql[DB2::NAME]);
 	}
 }

reference/SQL_MultiDB/multidb.h

@@ -1,16 +1,27 @@
 #ifndef _SQL_MultiDB_multidb_h_
 #define _SQL_MultiDB_multidb_h_
 
+#include <MySql/MySql.h>
+#include <plugin/sqlite3/Sqlite3.h>
+
+using namespace Upp;
+
 #define SCHEMADIALECT <MySql/MySqlSchema.h>
 #define MODEL <SQL_MultiDB/mysql_schema.sch>
 #include <Sql/sch_header.h>
-#undef SCHEMADIALECT
+#undef MODEL         // with multiple schemas, we need to do cleanup so that MODEL and
+#undef SCHEMADIALECT // SCHEMDIALECT can be redefined to second schema values
 
 namespace DB2 {
+	
 #define SCHEMADIALECT <plugin/sqlite3/Sqlite3Schema.h>
 #define MODEL <SQL_MultiDB/sqlite3_schema.sch>
 #include <Sql/sch_header.h>
+#undef MODEL
 #undef SCHEMADIALECT
+
+void DB2_All_Tables(SqlSchema& sch);
+
 };
 
 #endif

reference/SQL_MultiDB/sqlite3_schema.sch

@@ -1,5 +1,5 @@
-TABLE(TEST_TABLE) // Note that column names definition is simply shared between schemas
-	INT     (ID)       PRIMARY_KEY AUTO_INCREMENT
-	STRING  (VALUE, 32)
+TABLE_(TEST_TABLE)
+	INT_    (ID)       PRIMARY_KEY AUTO_INCREMENT
+	STRING_ (VALUE, 32)
 	STRING_ (NAME, 200)
 END_TABLE