public string GetSql()
{
StringBuilder builder = new StringBuilder();
string altName = null;
if (_exists)
{
Guid g = Guid.NewGuid();
altName = String.Format(CultureInfo.InvariantCulture, "{0}_{1}", Name, g.ToString("N"));
if (_oldindexes.Count > 0)
{
builder.Append("-- Drop previous indexes on the table\r\n");
foreach (Index idx in _oldindexes)
{
builder.AppendFormat("DROP INDEX [{0}].[{1}];\r\n", _catalog, idx.Name);
}
builder.AppendLine();
}
if (_oldtriggers.Count > 0)
{
builder.Append("-- Drop previous triggers on the table\r\n");
foreach (Trigger trig in _oldtriggers)
{
builder.AppendFormat("DROP TRIGGER [{0}].[{1}];\r\n", _catalog, trig.Name);
}
builder.AppendLine();
}
builder.Append("-- Rename the old table\r\n");
builder.AppendFormat("ALTER TABLE [{0}].[{1}] RENAME TO [{2}];\r\n\r\n", _catalog, _oldname, altName);
}
builder.Append("-- Create the new table\r\n");
builder.AppendFormat("CREATE TABLE [{0}].[{1}] (\r\n", _catalog, Name);
string separator = " ";
foreach (Column c in Columns)
{
if (String.IsNullOrEmpty(c.ColumnName) == false)
{
builder.Append(separator);
c.WriteSql(builder);
separator = ",\r\n ";
}
}
if (_key.Columns.Count > 1)
{
string innersep = "";
builder.AppendFormat(CultureInfo.InvariantCulture, "{0}CONSTRAINT [PK_{1}] PRIMARY KEY (", separator, Name);
foreach (IndexColumn c in _key.Columns)
{
builder.AppendFormat(CultureInfo.InvariantCulture, "{0}[{1}]", innersep, c.Column);
if (String.IsNullOrEmpty(c.Collate) == false && String.Compare(c.Collate, "BINARY", StringComparison.OrdinalIgnoreCase) != 0)
{
builder.AppendFormat(CultureInfo.InvariantCulture, " COLLATE {0}", c.Collate.ToUpperInvariant());
}
if (c.SortMode != ColumnSortMode.Ascending)
{
builder.Append(" DESC");
}
innersep = ", ";
}
builder.Append(")");
if (_key.Conflict != ConflictEnum.Abort)
{
builder.AppendFormat(CultureInfo.InvariantCulture, " ON CONFLICT {0}", _key.Conflict.ToString().ToUpperInvariant());
}
}
for (int n = 0; n < Check.Count; n++)
{
string check = Check[n];
if (String.IsNullOrEmpty(check) == true)
{
continue;
}
SimpleTokenizer.StringParts[] arr = SimpleTokenizer.BreakString(check);
for (int x = 0; x < arr.Length; x++)
{
if (arr[x].depth == 0)
{
check = String.Format(CultureInfo.InvariantCulture, "({0})", check);
break;
}
}
builder.Append(separator);
builder.AppendFormat("CONSTRAINT [CK_{0}_{1}] CHECK {2}", Name, n + 1, check);
}
List <ForeignKey> keys = new List <ForeignKey>();
for (int x = 0; x < ForeignKeys.Count; x++)
{
ForeignKey key = ForeignKeys[x];
if (String.IsNullOrEmpty(key.From.Column) == true || String.IsNullOrEmpty(key.From.Catalog) == true ||
String.IsNullOrEmpty(key.To.Table) == true || String.IsNullOrEmpty(key.To.Column) == true)
{
continue;
}
if (keys.Count > 0)
{
if (keys[0].Name == key.Name && keys[0].To.Catalog == key.To.Catalog && keys[0].To.Table == key.To.Table)
{
keys.Add(key);
continue;
}
builder.Append(separator);
WriteFKeys(keys, builder);
keys.Clear();
}
keys.Add(key);
}
if (keys.Count > 0)
{
builder.Append(separator);
WriteFKeys(keys, builder);
}
builder.Append("\r\n);\r\n");
// Rebuilding an existing table
if (altName != null)
{
separator = "";
builder.Append("\r\n-- Copy the contents of the old table into the new table\r\n");
builder.AppendFormat("INSERT INTO [{0}].[{1}] (", _catalog, Name);
foreach (Column c in Columns)
{
if (String.IsNullOrEmpty(c.OriginalName) == false)
{
builder.AppendFormat("{1}[{0}]", c.ColumnName, separator);
separator = ", ";
}
}
builder.Append(")\r\n SELECT ");
separator = "";
foreach (Column c in Columns)
{
if (String.IsNullOrEmpty(c.OriginalName) == false)
{
builder.AppendFormat("{1}[{0}]", c.OriginalName, separator);
separator = ", ";
}
}
builder.AppendFormat("\r\n FROM [{0}].[{1}];\r\n\r\n", _catalog, altName);
builder.Append("-- Drop the old table\r\n");
builder.AppendFormat("DROP TABLE [{0}].[{1}];\r\n", _catalog, altName);
}
separator = "\r\n";
if (_indexes.Count > 0)
{
builder.Append("\r\n-- Create the new indexes");
foreach (Index idx in _indexes)
{
builder.Append(separator);
idx.WriteSql(builder);
}
builder.AppendLine();
}
if (_triggers.Count > 0)
{
builder.Append("\r\n-- Create the new triggers");
foreach (Trigger trig in _triggers)
{
builder.Append(separator);
trig.WriteSql(builder);
separator = "\r\n";
}
builder.AppendLine();
}
return(builder.ToString());
}
internal Trigger(ViewTableBase parent, DataRow row)
{
_table = parent;
if (row != null)
{
_name = row["TRIGGER_NAME"].ToString();
string sql = row["TRIGGER_DEFINITION"].ToString();
_origsql = sql;
SimpleTokenizer.StringParts[] arr = SimpleTokenizer.BreakString(sql);
int x = 3;
switch (arr[x].keyword)
{
case "BEFORE":
_triggerOccurs = 0;
break;
case "AFTER":
_triggerOccurs = 1;
break;
case "INSTEAD":
_triggerOccurs = 2;
x++;
break;
default:
x--;
break;
}
x++;
switch (arr[x].keyword)
{
case "UPDATE":
_type = TriggerType.Update;
if (arr[x + 1].keyword == "OF")
{
x++;
StringBuilder builder = new StringBuilder();
string separator = "";
while (arr[x + 1].keyword != "ON")
{
builder.AppendFormat("{0}[{1}]", separator, arr[x + 1].value);
separator = ", ";
x++;
}
_columns = builder.ToString();
}
break;
case "INSERT":
_type = TriggerType.Insert;
break;
case "DELETE":
_type = TriggerType.Delete;
break;
}
x++;
while (arr[x].keyword != "BEGIN")
{
if (arr[x].keyword == "FOR" && arr[x + 1].keyword == "EACH" && arr[x + 1].keyword == "ROW")
{
//_eachRow = true;
x += 3;
continue;
}
if (arr[x].keyword == "WHEN")
{
x++;
int depth = 0;
StringBuilder builder = new StringBuilder();
while (arr[x].keyword != "BEGIN")
{
if (builder.Length > 0)
{
builder.Append(" ");
}
while (depth < arr[x].depth)
{
depth++;
builder.Append("(");
}
while (depth > arr[x].depth)
{
depth--;
builder.Append(")");
}
if (String.IsNullOrEmpty(arr[x].quote) == false)
{
builder.Append(arr[x].quote[0]);
}
builder.Append(arr[x].value);
if (String.IsNullOrEmpty(arr[x].quote) == false)
{
builder.Append(arr[x].quote[1]);
}
x++;
}
while (depth > 0)
{
depth--;
builder.Append(")");
}
_when = builder.ToString();
break;
}
x++;
}
int startpos = arr[x].position + arr[x].value.Length;
x = arr.Length - 1;
while (arr[x].keyword != "END")
{
x--;
}
int endpos = arr[x].position;
_action = sql.Substring(startpos, endpos - startpos);
_action = _action.TrimStart('\r').TrimStart('\n').TrimEnd('\n').TrimEnd('\r').Trim();
}
}
private void ReloadDefinition()
{
using (DataTable tbl = _connection.GetSchema("Tables", new string[] { Catalog, null, Name }))
{
if (tbl.Rows.Count > 0)
{
_exists = true;
_origSql = tbl.Rows[0]["TABLE_DEFINITION"].ToString().Trim().TrimEnd(';');
_oldname = Name;
}
else
{
_exists = false;
return;
}
}
_indexes.Clear();
_oldindexes.Clear();
using (DataTable tbl = _connection.GetSchema("Indexes", new string[] { Catalog, null, Name }))
{
foreach (DataRow row in tbl.Rows)
{
if ((bool)row["PRIMARY_KEY"] == false)
{
if (row["INDEX_NAME"].ToString().StartsWith("sqlite_", StringComparison.OrdinalIgnoreCase) == false)
{
_indexes.Add(new Index(_connection, this, row));
_oldindexes.Add(new Index(_connection, this, row));
}
}
else if (_key == null)
{
_key = new PrimaryKey(_connection, this, row);
}
}
}
_check.Clear();
StringBuilder builder = new StringBuilder();
SimpleTokenizer.StringParts[] arr = SimpleTokenizer.BreakString(_origSql);
for (int n = 0; n < arr.Length - 3; n++)
{
if (arr[n].keyword == "CONSTRAINT")
{
builder.Length = 0;
int x;
for (x = 1; x < 3; x++)
{
if (arr[n + x].keyword == "CHECK")
{
break;
}
}
if (x == 3)
{
n += 2;
continue;
}
x += n + 1;
int depth = arr[n].depth;
int basedepth = arr[x].depth;
for (; x < arr.Length; x++)
{
if (arr[x].depth < basedepth)
{
break;
}
if (builder.Length > 0)
{
builder.Append(" ");
}
while (depth < arr[x].depth)
{
builder.Append("(");
depth++;
}
while (depth > arr[x].depth)
{
builder.Append(")");
depth--;
}
if (String.IsNullOrEmpty(arr[x].quote) == false)
{
builder.Append(arr[x].quote[0]);
}
builder.Append(arr[x].value);
if (String.IsNullOrEmpty(arr[x].quote) == false)
{
builder.Append(arr[x].quote[1]);
}
if (arr[x].sep == true)
{
break;
}
}
while (depth > arr[n].depth)
{
builder.Append(")");
depth--;
}
n = x;
_check.Add(builder.ToString());
}
}
builder.Length = 0;
builder.AppendLine("-- Original table schema");
builder.Append(_origSql);
builder.AppendLine(";");
foreach (Index idx in _oldindexes)
{
builder.AppendFormat("{0};\r\n", idx.OriginalSql);
}
_triggers.Clear();
_oldtriggers.Clear();
using (DataTable tbl = _connection.GetSchema("Triggers", new string[] { Catalog, null, Name }))
{
foreach (DataRow row in tbl.Rows)
{
Trigger t = new Trigger(this, row);
_triggers.Add(t);
_oldtriggers.Add(((ICloneable)t).Clone() as Trigger);
builder.AppendFormat("{0};\r\n", t.OriginalSql);
}
}
_origSql = builder.ToString();
}
