private long GetValue(IPaginationValueSegment paginationValueSegment, ParameterContext parameterContext)
{
if (paginationValueSegment is IParameterMarkerPaginationValueSegment parameterMarkerPaginationValueSegment)
{
if (parameterContext.TryGetParameterValue(parameterMarkerPaginationValueSegment.GetParameterName(), out var parameterValue))
{
return(parameterValue is long l ? l : (int)parameterValue);
}
else
{
throw new ShardingException(
$"{nameof(IParameterMarkerPaginationValueSegment)} cant get value that parameter name:[{parameterMarkerPaginationValueSegment.GetParameterName()}] ");
}
}
else
{
return(((INumberLiteralPaginationValueSegment)paginationValueSegment).GetValue());
}
}
/// <summary>
/// 找到自动生成的键比如自增id
/// </summary>
/// <param name="parameterContext"></param>
/// <param name="insertCommand"></param>
/// <param name="generateKeyColumnName"></param>
/// <returns></returns>
/// <exception cref="ShardingException"></exception>
private ParserBinder.Segment.Insert.Keygen.GeneratedKeyContext FindGeneratedKey(ParameterContext parameterContext, InsertCommand insertCommand, string generateKeyColumnName)
{
ParserBinder.Segment.Insert.Keygen.GeneratedKeyContext result = new ParserBinder.Segment.Insert.Keygen.GeneratedKeyContext(generateKeyColumnName, false);
foreach (var expression in FindGenerateKeyExpressions(insertCommand, generateKeyColumnName))
{
if (expression is ParameterMarkerExpressionSegment parameterMarkerExpressionSegment)
{
var parameterName = parameterMarkerExpressionSegment.GetParameterName();
if (!parameterContext.TryGetParameterValue(parameterName, out var value))
{
throw new ShardingException($"not found parameter name:[{parameterName}] in parameters");
}
result.GetGeneratedValues().Add((IComparable)value);
}
else if (expression is LiteralExpressionSegment literalExpressionSegment)
{
result.GetGeneratedValues().Add((IComparable)literalExpressionSegment.GetLiterals());
}
}
return(result);
}