public static DbSchemaChange GetByNo(DbConnector dbConn, uint changeNo) {
dbConn.SetQueryText(string.Format("select ChangeID, ChangeNo, ScriptName, DateInstall from A_SCHEMA_CHANGES_LOG where ChangeNo = {0}", changeNo));
dbConn.Execute();
if (!dbConn.NextRow()) {
return null;
}
var sch = new DbSchemaChange();
sch.FromDb(dbConn);
return sch;
}
public static DbSchemaChange GetLast(DbConnector dbConn) {
dbConn.SetQueryText("select ChangeID, ChangeNo, ScriptName, DateInstall from A_SCHEMA_CHANGES_LOG order by ChangeNo desc");
dbConn.Execute();
if (!dbConn.NextRow()) {
return null;
}
var sch = new DbSchemaChange();
sch.FromDb(dbConn);
return sch;
}
private static bool _applySchemaChange(DbConnector dbConn, string changeFile) {
Console.WriteLine("DbBuilder: Applying schema change script {0}...", changeFile);
string cfn = Path.GetFileNameWithoutExtension(changeFile);
if (cfn.Length != 9) {
goto WrongScriptName;
}
string pfx = cfn.Substring(0, 4);
if (pfx != "Sch-") {
goto WrongScriptName;
}
uint chn = (uint)Convert.ToUInt32(cfn.Substring(4));
if (chn == 0) {
goto WrongScriptName;
}
var dbSch = DbSchemaChange.GetByNo(dbConn, chn);
if (dbSch != null) {
Console.WriteLine("DbBuilder: Change #{0} already installed. Exit.", chn);
return true;
}
dbSch = DbSchemaChange.GetLast(dbConn);
if (dbSch == null) {
Console.WriteLine("DbBuilder: Error: Schema seems not installed. STOP !");
return false;
}
if ((chn - 1) != dbSch.ChangeNo) {
Console.WriteLine("DbBuilder: Error: Bad changes sequence. STOP !");
return false;
}
if (!_executeScript(dbConn, changeFile)) {
Console.WriteLine("DbBuilder: Error: Script {0} failed. STOP !", changeFile);
return false;
}
dbSch = new DbSchemaChange();
dbSch.ChangeID = Guid.NewGuid();
dbSch.ChangeNo = chn;
dbSch.ScriptName = cfn;
dbSch.DateInstall = DateTime.Now;
dbSch.Add(dbConn);
Console.WriteLine("DbBuilder: Schema change #{0}...", chn);
return true;
WrongScriptName:
Console.WriteLine("DbBuilder: Error: Wrong script name. STOP !");
return false;
}
private static bool _createSchema(DbConnector dbConn) {
Console.WriteLine("DbBuilder: Creating schema changes log table...");
if (!_executeScript(dbConn, Path.Combine(_project, "Schema\\SchemaChangesLogTable.sql"))) {
Console.WriteLine("DbBuilder: Error: Failed to create schema changes log table. STOP !");
return false;
}
Console.WriteLine("DbBuilder: Creating schema...");
DbSchemaChange sch = new DbSchemaChange();
sch.ChangeID = Guid.NewGuid();
sch.ChangeNo = 0;
sch.ScriptName = "Schema.sql";
sch.DateInstall = DateTime.Now;
if (!_executeScript(dbConn, Path.Combine(_project, "Schema\\" + sch.ScriptName))) {
Console.WriteLine("DbBuilder: Error: Failed to create schema. STOP !");
return false;
}
sch.Add(dbConn);
Console.WriteLine("DbBuilder: Done.");
return true;
}
