VAR/VAR.DatabaseExplorer
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DatabaseBL.Database_ExportData: Split data files.

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This commit is contained in:
Valeriano A.R.
2019-10-07 11:07:35 +02:00
parent 0d159402b5
commit e030ecd765
2 changed files with 28 additions and 2 deletions
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27
VAR.DatabaseExplorer/Code/BusinessLogic/DatabaseBL.cs
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@@ -67,6 +67,10 @@ namespace VAR.DatabaseExplorer.Code.BusinessLogic
public static void Database_ExportData(TextWriter txtWriter, string connectionString, Database database) public static void Database_ExportData(TextWriter txtWriter, string connectionString, Database database)
{ {
const int OneMegaByte = 1 * 1024 * 1024;
const int MaxSizePerBatch = OneMegaByte;
const int MaxSizePerFile = OneMegaByte * 32;
// Preparar cabecera del script // Preparar cabecera del script
txtWriter.WriteLine("SET NOCOUNT ON;"); txtWriter.WriteLine("SET NOCOUNT ON;");
txtWriter.WriteLine(string.Empty); txtWriter.WriteLine(string.Empty);
@@ -84,9 +88,30 @@ namespace VAR.DatabaseExplorer.Code.BusinessLogic
txtWriter.WriteLine(string.Empty); txtWriter.WriteLine(string.Empty);
// Prepara información a exportar // Prepara información a exportar
long batchLength = 0;
long fileLength = 0;
foreach (Table table in database.Tables) foreach (Table table in database.Tables)
{ {
TableBL.Table_ExportData(table, txtWriter, connectionString); TableBL.Table_ExportData(table, txtWriter, connectionString, (lenght) =>
{
batchLength += lenght;
fileLength += lenght;
if (batchLength > MaxSizePerBatch)
{
txtWriter.WriteLine("PRINT '...';");
txtWriter.WriteLine("GO");
batchLength = 0;
}
if (fileLength > MaxSizePerFile)
{
txtWriter.WriteLine("PRINT '...';");
txtWriter.WriteLine("GO");
SplittingStreamWriter.Split(txtWriter);
fileLength = 0;
batchLength = 0;
}
});
} }
// Activar todas las FKs // Activar todas las FKs

3
VAR.DatabaseExplorer/UI/FrmBaseDatos.cs
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@@ -2,6 +2,7 @@
using System.Collections.Generic; using System.Collections.Generic;
using System.IO; using System.IO;
using System.Windows.Forms; using System.Windows.Forms;
using VAR.DatabaseExplorer.Code;
using VAR.DatabaseExplorer.Code.BusinessLogic; using VAR.DatabaseExplorer.Code.BusinessLogic;
using VAR.DatabaseExplorer.Code.DataAccess; using VAR.DatabaseExplorer.Code.DataAccess;
using VAR.DatabaseExplorer.Code.DataTransfer; using VAR.DatabaseExplorer.Code.DataTransfer;
@@ -116,7 +117,7 @@ namespace VAR.DatabaseExplorer.UI
Database database = DatabaseBL.Database_GetSchema(connectionString: _connectionString, fillTableDefinitions: true); Database database = DatabaseBL.Database_GetSchema(connectionString: _connectionString, fillTableDefinitions: true);
string fixedDatabaseName = database.Name.Replace(' ', '_'); string fixedDatabaseName = database.Name.Replace(' ', '_');
var streamWriter = new StreamWriter("05." + fixedDatabaseName + ".Data.sql"); var streamWriter = new SplittingStreamWriter("05." + fixedDatabaseName + ".{0:000}.Data.sql");
DatabaseBL.Database_ExportData(streamWriter, _connectionString, database); DatabaseBL.Database_ExportData(streamWriter, _connectionString, database);
streamWriter.Close(); streamWriter.Close();