/// <summary>
/// 写入单个数据源对象。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="fragment">写入语句。</param>
protected virtual void WriteFragmentForSource(SqlWriter writer, ISqlFragment fragment)
{
var source = (SourceFragment)fragment;
if (source.Join.HasValue)
{
WriteFragmentForSourceJoin(writer, source);
WriteFragmentForSourceContent(writer, source);
WriteFragmentForSourceCondition(writer, source);
}
else
{
WriteFragmentForSourceContent(writer, source);
}
}
/// <summary>
/// 写入数据源内容。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="source">数据源语句。</param>
protected virtual void WriteFragmentForSourceContent(SqlWriter writer, ISourceFragment source)
{
if (source is SelectFragment || source is SetFragment)
{
writer.Write('(');
source.WriteSql(writer);
writer.Write(')');
}
else
{
source.WriteSql(writer);
}
if (!(source is InheritFragment))
{
writer.Write(" AS ");
writer.Write(source.AliasName);
}
}
private void WriteBinaryForSimple(SqlWriter writer, ISqlFragment fragment)
{
var binary = (BinaryFragment)fragment;
binary.Left.WriteSql(writer);
switch (binary.Kind)
{
case EBinaryKind.AndAlso: break;
case EBinaryKind.OrElse: break;
case EBinaryKind.Add: writer.Write(" + "); break;
case EBinaryKind.Subtract: writer.Write(" - "); break;
case EBinaryKind.Multiply: writer.Write(" * "); break;
case EBinaryKind.Divide: writer.Write(" / "); break;
case EBinaryKind.Modulo: writer.Write(" % "); break;
case EBinaryKind.And: writer.Write(" & "); break;
case EBinaryKind.Or: writer.Write(" | "); break;
case EBinaryKind.ExclusiveOr: writer.Write(" ^ "); break;
case EBinaryKind.Equal: writer.Write(" = "); break;
case EBinaryKind.NotEqual: writer.Write(" != "); break;
case EBinaryKind.GreaterThanOrEqual: writer.Write(" >= "); break;
case EBinaryKind.GreaterThan: writer.Write(" > "); break;
case EBinaryKind.LessThan: writer.Write(" < "); break;
case EBinaryKind.LessThanOrEqual: writer.Write(" <= "); break;
}
binary.Right.WriteSql(writer);
}
/// <summary>
/// 写入参数名称。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="name">名称。</param>
public virtual void WriteParameterName(SqlWriter writer, string name)
{
writer.Write('@');
writer.Write(name);
}
/// <summary>
/// 写入别名。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="name">名称。</param>
public virtual void WriteAliasName(SqlWriter writer, string name)
{
writer.Write(" AS ");
writer.Write(name);
}
/// <summary> /// 写入数据库安全名称。 /// </summary> /// <param name="writer">语句写入器。</param> /// <param name="name">名称。</param> public abstract void WriteDbName(SqlWriter writer, string name);
/// <summary>
/// 写入语句终止符。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="fragment">当前语句。</param>
public virtual void WriteTerminator(SqlWriter writer, ISqlFragment fragment) => writer.Write(';');
/// <summary>
/// 写入语句结束符。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="fragment">片段对象。</param>
internal void WriteTerminator(SqlWriter writer, ISqlFragment fragment)
{
_FragmentWriter.WriteTerminator(writer, fragment);
}
/// <summary>
/// 写入语句片段。
/// </summary>
/// <param name="writer">语句写入器。</param>
/// <param name="fragment">片段对象。</param>
internal void WriteFragment(SqlWriter writer, ISqlFragment fragment)
{
_FragmentWriter.WriteFragment(writer, fragment);
}
/// <summary> /// 写入数据库对象名称。 /// </summary> /// <param name="writer">语句写入器。</param> /// <param name="name">名称。</param> /// <param name="schema">架构名。</param> public abstract void WriteDbObject(SqlWriter writer, string name, string schema);
