protected override void fillFromDataSet(DataSet ds, DataRow dr, List <TableInfo> tables)
{
if (tables.Exists(t => {
return(t.TableName.ToUpper().Trim() == TableName.ToUpper().Trim());
}))
{
// this table has already been added.
return;
}
// pull info from datarow
PrimaryKeySortType = dr["primary_key_sort_type"].ToString();
CharacterSet = dr["charset"].ToString();
Collation = dr["collation"].ToString();
Engine = dr["engine"].ToString();
IsSelected = Toolkit.ToBoolean(dr["is_selected"], false);
RowCount = Toolkit.ToInt32(dr["row_count"], 0);
// look up all fields associated with this table
DataTable dtTableField = ds.Tables["TableFieldInfo"];
DataRow[] drTableFields = dtTableField.Select("parent_id = " + dr["id"]);
foreach (DataRow dr2 in drTableFields)
{
Fields.Add(FieldInfo.GetInstance(this).FillFromDataSet(dr2, null, tables));
}
// look up all indexes associated with this table
var drIndexes = ds.Tables["IndexInfo"].Select("parent_id = " + dr["id"]);
IndexInfo idx = null;
foreach (DataRow dr3 in drIndexes)
{
if (idx == null || idx.IndexName.ToLower() != dr3["index_name"].ToString().ToLower())
{
idx = IndexInfo.GetInstance(this);
idx.FillFromDataSet(ds, dr3);
this.Indexes.Add(idx);
}
}
DataRow[] drConstraints = ds.Tables["ConstraintInfo"].Select("parent_id = " + dr["id"]);
ConstraintInfo ci = null;
foreach (DataRow dr4 in drConstraints)
{
if (ci == null || ci.ConstraintName.ToLower() != dr4["constraint_name"].ToString().ToLower())
{
ci = ConstraintInfo.GetInstance(this);
ci.FillFromDataSet(ds, dr4, tables);
Constraints.Add(ci);
}
}
}
public IndexInfo Clone(TableInfo newParent)
{
IndexInfo ii = IndexInfo.GetInstance(newParent);
ii.DataConnectionSpec = this.DataConnectionSpec;
ii.IndexKind = IndexKind;
ii.IndexName = IndexName;
ii.IndexType = IndexType;
ii.SyncAction = SyncAction;
ii.TableName = newParent.TableName;
foreach (FieldInfo fi in Fields)
{
ii.Fields.Add(fi.Clone(newParent));
}
return(ii);
}
/// <summary>
/// Assumes given object is the slave and the current object is the source. Creates a new TableInfo object representing the source's properties overriding the target's.
/// </summary>
/// <param name="slave"></param>
/// <returns></returns>
public TableInfo CreateDiff(TableInfo target)
{
// to create a table:
// src.SyncAction = Create
// to Drop a table:
// src.SyncAction = Drop
// to drop an index:
// src.SyncAction = Nothing,
// src.Indexes[blah].SyncAction = Drop
// to drop a constraint:
// src.SyncAction = Nothing,
// src.Constraints[blah].SyncAction = Drop
// to create a field on an existing table:
// src.SyncAction = Alter
// src.Fields[blah].SyncAction = Create
// to modify a field on an existing table:
// src.SyncAction = Alter
// src.Fields[blah].SyncAction = Alter
// to drop a field on an existing table:
// src.SyncAction = Alter
// src.Fields[blah].SyncAction = Drop
TableInfo diff = null;
if (target == null)
{
// target doesn't exist. if master says to alter or create, create it.
// if master says to drop or nothing, ignore it.
if (SyncAction == SyncAction.Alter || SyncAction == SyncAction.Create)
{
diff = this.Clone(true, true, true);
diff.SyncAction = SyncAction.Create;
// fields
foreach (FieldInfo fi in diff.Fields)
{
if (fi.SyncAction == SyncAction.Create || fi.SyncAction == SyncAction.Alter)
{
fi.SyncAction = SyncAction.Create;
}
else
{
fi.SyncAction = SyncAction.Nothing;
}
}
// indexes
foreach (IndexInfo ii in diff.Indexes)
{
if (ii.SyncAction == SyncAction.Create || ii.SyncAction == SyncAction.Alter)
{
ii.SyncAction = SyncAction.Create;
}
else
{
ii.SyncAction = SyncAction.Nothing;
}
}
//constraints
foreach (ConstraintInfo ci in diff.Constraints)
{
if (ci.SyncAction == SyncAction.Create || ci.SyncAction == SyncAction.Alter)
{
ci.SyncAction = SyncAction.Create;
}
else
{
ci.SyncAction = SyncAction.Nothing;
}
}
}
else
{
// if it's drop or nothing, do nothing (as it doesn't exist)
diff = this.Clone(false, false, false);
diff.SyncAction = SyncAction.Nothing;
}
}
else
{
// target exists, perform a diff
diff = this.Clone(true, true, true);
switch (diff.SyncAction)
{
case SyncAction.Drop:
// target exists and action is drop.
// mark as drop for everything (constraints, indexes, table)
diff.SyncAction = SyncAction.Drop;
// indexes
foreach (IndexInfo ii in diff.Indexes)
{
ii.SyncAction = SyncAction.Drop;
}
// constraints
foreach (ConstraintInfo ci in Constraints)
{
ci.SyncAction = SyncAction.Drop;
}
break;
case SyncAction.Nothing:
// target exists and action is nothing.
//
break;
case SyncAction.Alter:
case SyncAction.Create:
// target exists, so we can't create it.
// mark it as alter.
diff.SyncAction = SyncAction.Alter;
foreach (FieldInfo fiSrc in Fields)
{
// we always add the field.
diff.Fields.Add(fiSrc);
FieldInfo fiTgt = target.Fields.Find(f => {
return(f.Name == fiSrc.Name);
});
// the corresponding target field (if any) tells us the action to do against it
if (fiTgt != null)
{
// target contains this field already.
if (fiSrc != fiTgt)
{
// target's is different. mark it as alter
fiSrc.SyncAction = SyncAction.Alter;
}
else
{
// field is exactly the same.
// do nothing. (don't even add it to the Fields collection)
fiSrc.SyncAction = SyncAction.Nothing;
}
}
else
{
// tgt doesn't have it.
if (fiSrc.SyncAction == SyncAction.Alter || fiSrc.SyncAction == SyncAction.Create)
{
// alter or create should show up as create (can't alter a non-existant field)
fiSrc.SyncAction = SyncAction.Create;
}
else
{
// it's either Drop or Nothing.
// either way we don't touch it, it already has the right SyncAction
}
}
}
// indexes
foreach (IndexInfo ii in diff.Indexes)
{
IndexInfo iiTgt = target.Indexes.Find(i => {
return(i.IndexName == ii.IndexName);
});
if (iiTgt != null)
{
// index exists on target.
switch (ii.SyncAction)
{
case SyncAction.Alter:
case SyncAction.Create:
iiTgt.SyncAction = SyncAction.Alter;
break;
case SyncAction.Drop:
iiTgt.SyncAction = SyncAction.Drop;
break;
case SyncAction.Nothing:
iiTgt.SyncAction = SyncAction.Nothing;
break;
}
}
}
// constraints
foreach (ConstraintInfo ci in Constraints)
{
ConstraintInfo ciNew = ci.Clone(diff);
diff.Constraints.Add(ciNew);
ConstraintInfo ciTgt = target.Constraints.Find(ciTemp => {
return(ciTemp.ConstraintName == ciNew.ConstraintName);
});
if (ciTgt != null)
{
// index exists on target.
switch (ci.SyncAction)
{
case SyncAction.Alter:
case SyncAction.Create:
ciTgt.SyncAction = SyncAction.Alter;
break;
case SyncAction.Drop:
ciTgt.SyncAction = SyncAction.Drop;
break;
case SyncAction.Nothing:
ciTgt.SyncAction = SyncAction.Nothing;
break;
}
}
}
break;
}
}
return(diff);
}
