private static SqlPreCommandSimple UpdateByFkChange(string tn, DiffColumn difCol, IColumn tabCol, Func <ObjectName, ObjectName> changeName)
{
if (difCol.ForeignKey == null || tabCol.ReferenceTable == null || tabCol.AvoidForeignKey)
{
return(null);
}
ObjectName oldFk = changeName(difCol.ForeignKey.TargetTable);
if (oldFk.Equals(tabCol.ReferenceTable.Name))
{
return(null);
}
AliasGenerator ag = new AliasGenerator();
return(new SqlPreCommandSimple(
@"UPDATE {2}
SET {0} = -- get {5} id from {4}.Id
FROM {1} {2}
JOIN {3} {4} ON {2}.{0} = {4}.Id".FormatWith(tabCol.Name,
tn, ag.NextTableAlias(tn),
oldFk, ag.NextTableAlias(oldFk.Name),
tabCol.ReferenceTable.Name.Name)));
}
private static string GenerateColumnCode(DiffColumn c)
{
var type = CodeGeneration.CodeGenerator.Entities.GetValueType(c);
if (c.Nullable)
{
type = type.Nullify();
}
StringBuilder sb = new StringBuilder();
if (c.Identity)
{
sb.AppendLine("[ViewPrimaryKey]");
}
sb.AppendLine($"public {type.TypeName()} {c.Name};");
return(sb.ToString());
}
public static string CreateOldColumn(DiffColumn c)
{
string fullType = GetColumnType(c);
var generatedAlways = c.GeneratedAlwaysType != GeneratedAlwaysType.None ?
$"GENERATED ALWAYS AS ROW {(c.GeneratedAlwaysType == GeneratedAlwaysType.AsRowStart ? "START" : "END")} HIDDEN" :
null;
var defaultConstraint = c.DefaultConstraint != null ? $"CONSTRAINT {c.DefaultConstraint.Name} DEFAULT " + c.DefaultConstraint.Definition : null;
return($" ".Combine(
c.Name.SqlEscape(),
fullType,
c.Identity ? "IDENTITY " : null,
generatedAlways,
c.Collation != null ? ("COLLATE " + c.Collation) : null,
c.Nullable ? "NULL" : "NOT NULL",
defaultConstraint
));
}
private static SqlPreCommandSimple UpdateByFkChange(string tn, DiffColumn difCol, IColumn tabCol, Func<ObjectName, ObjectName> changeName)
{
if (difCol.ForeignKey == null || tabCol.ReferenceTable == null || tabCol.AvoidForeignKey)
return null;
ObjectName oldFk = changeName(difCol.ForeignKey.TargetTable);
if (oldFk.Equals(tabCol.ReferenceTable.Name))
return null;
AliasGenerator ag = new AliasGenerator();
return new SqlPreCommandSimple(
@"UPDATE {2}
SET {0} = -- get {5} id from {4}.Id
FROM {1} {2}
JOIN {3} {4} ON {2}.{0} = {4}.Id".FormatWith(tabCol.Name,
tn, ag.NextTableAlias(tn),
oldFk, ag.NextTableAlias(oldFk.Name),
tabCol.ReferenceTable.Name.Name));
}
public static string GetColumnType(DiffColumn c)
{
return(c.SqlDbType == SqlDbType.Udt ? c.UserTypeName ! : c.SqlDbType.ToString().ToUpper()) /*+ GetSizeScale(Math.Max(c.Length, c.Precision), c.Scale)*/;
}
public static SqlPreCommand AlterTableAddOldColumn(ITable table, DiffColumn column)
{
return(new SqlPreCommandSimple("ALTER TABLE {0} ADD {1}".FormatWith(table.Name, CreateOldColumn(column))));
}
