public static void AlterTable(AlterPlan plan, ITableStructure oldTable, ITableStructure newTable, DbDiffOptions opts, DbObjectPairing pairing)
{
//plan.BeginFixedOrder();
if (oldTable == null)
{
throw new ArgumentNullException("oldTable", "DAE-00240 oldTable is null");
}
if (newTable == null)
{
throw new ArgumentNullException("newTable", "DAE-00241 newTable is null");
}
//bool processed;
//proc.AlterTable(oldTable, newTable, out processed);
//if (processed) return;
InMemoryTableOperation dataOps = null;
if (oldTable.FixedData != null)
{
dataOps = new InMemoryTableOperation(oldTable.FixedData.Structure);
}
NameWithSchema newTableName = GenerateNewName(oldTable.FullName, newTable.FullName, opts);
bool permuteColumns = false;
bool insertColumns = false;
//bool renameColumns = false;
List <int> columnMap = new List <int>();
List <int> constraintMap = new List <int>();
foreach (var col in newTable.Columns)
{
columnMap.Add(oldTable.Columns.IndexOfIf(c => c.GroupId == col.GroupId));
}
foreach (var cnt in newTable.Constraints)
{
int cindex = oldTable.Constraints.IndexOfIf(c => c.GroupId == cnt.GroupId);
if (cindex < 0 && cnt is IPrimaryKey)
{
// primary keys for one table are equal
cindex = oldTable.Constraints.IndexOfIf(c => c is IPrimaryKey);
}
constraintMap.Add(cindex);
}
if (!opts.IgnoreColumnOrder)
{
// count alter requests
int lastcol = -1;
foreach (int col in columnMap)
{
if (col < 0)
{
continue;
}
if (col < lastcol)
{
permuteColumns = true;
}
lastcol = col;
}
bool wasins = false;
foreach (int col in columnMap)
{
if (col < 0)
{
wasins = true;
}
if (col >= 0 && wasins)
{
insertColumns = true;
}
}
}
int index;
// drop constraints
index = 0;
foreach (IConstraint cnt in oldTable.Constraints)
{
if (constraintMap.IndexOf(index) < 0)
{
plan.DropConstraint(cnt);
}
index++;
}
// drop columns
index = 0;
foreach (IColumnStructure col in oldTable.Columns)
{
if (columnMap.IndexOf(index) < 0)
{
plan.DropColumn(col);
if (dataOps != null)
{
dataOps.DropColumn(col.ColumnName);
}
}
index++;
}
if (!DbDiffTool.EqualFullNames(oldTable.FullName, newTable.FullName, opts))
{
plan.RenameTable(oldTable, newTable.FullName);
}
// create columns
index = 0;
foreach (IColumnStructure col in newTable.Columns)
{
if (columnMap[index] < 0)
{
ColumnStructure newcol = new ColumnStructure(col);
plan.CreateColumn(oldTable, newcol);
if (dataOps != null)
{
dataOps.CreateColumn(newcol);
}
}
index++;
}
// change columns
index = 0;
foreach (IColumnStructure col in newTable.Columns)
{
if (columnMap[index] >= 0)
{
IColumnStructure src = oldTable.Columns[columnMap[index]];
if (!DbDiffTool.EqualsColumns(src, col, true, opts, pairing))
{
using (var ctx = new DbDiffChangeLoggerContext(opts, NopLogger.Instance, DbDiffOptsLogger.DiffLogger))
{
if (DbDiffTool.EqualsColumns(src, col, false, opts, pairing))
{
plan.RenameColumn(src, col.ColumnName);
}
else
{
plan.ChangeColumn(src, col);
}
if (dataOps != null && src.ColumnName != col.ColumnName)
{
dataOps.RenameColumn(src.ColumnName, col.ColumnName);
}
}
}
}
index++;
}
// create fixed data script
var script = AlterFixedData(oldTable.FixedData, newTable.FixedData, dataOps, opts);
if (script != null)
{
plan.UpdateData(oldTable.FullName, script);
}
// change constraints
index = 0;
foreach (IConstraint cnt in newTable.Constraints)
{
if (constraintMap[index] >= 0)
{
IConstraint src = oldTable.Constraints[constraintMap[index]];
if (DbDiffTool.EqualsConstraints(src, cnt, opts, false, pairing) && src.Name != cnt.Name)
{
if (cnt is IPrimaryKey && (pairing.Source.Dialect.DialectCaps.AnonymousPrimaryKey || pairing.Target.Dialect.DialectCaps.AnonymousPrimaryKey))
{
// do nothing
}
else
{
plan.RenameConstraint(src, cnt.Name);
}
}
else
{
if (!DbDiffTool.EqualsConstraints(src, cnt, opts, true, pairing))
{
plan.ChangeConstraint(src, cnt);
}
}
}
index++;
}
// create constraints
index = 0;
foreach (IConstraint cnt in newTable.Constraints)
{
if (constraintMap[index] < 0)
{
plan.CreateConstraint(oldTable, cnt);
}
index++;;
}
if (permuteColumns || insertColumns)
{
plan.ReorderColumns(oldTable, new List <string>((from c in newTable.Columns select c.ColumnName)));
}
var alteredOptions = GetTableAlteredOptions(oldTable, newTable, opts);
if (alteredOptions.Count > 0)
{
plan.ChangeTableOptions(oldTable, alteredOptions);
}
//plan.EndFixedOrder();
}