private DmlfUpdate CompileUpdateCore(Func<TargetColumnSqlModelBase, bool> compareColumn, Func<TargetColumnSqlModelBase, bool> updateColumn, Action<DmlfUpdate> createUpdateSpecialColumns, CompareColumnContext compareContext, UpdateColumnContext updateContext)
{
var cmd = new DmlfUpdate();
cmd.UpdateTarget = new DmlfSource { Alias = "target" };
cmd.From.Add(SourceJoinModel.SourceToRefsJoin);
cmd.From.Add(new DmlfFromItem
{
Source = new DmlfSource
{
Alias = "target",
TableOrView = TargetTableSqlName,
LinkedInfo = TargetLinkedInfo,
}
});
CreateKeyCondition(cmd, "target");
CreateLifetimeConditions(cmd, "target");
CreateFilterConditions(cmd);
createUpdateSpecialColumns(cmd);
foreach (var column in TargetColumns)
{
bool? update = _dbsh.LifetimeHandler.UpdateColumn(column.Name, updateContext);
if (update == null) update = updateColumn(column);
if (!update.Value) continue;
cmd.Columns.Add(new DmlfUpdateField
{
TargetColumn = column.Name,
Expr = column.CreateSourceExpression(SourceJoinModel, false),
});
}
var orCondition = new DmlfOrCondition();
foreach (var column in TargetColumns)
{
bool? compare = _dbsh.LifetimeHandler.CompareColumn(column.Name, compareContext);
if (compare == null) compare = compareColumn(column);
if (!compare.Value) continue;
if (column.CannotBeCompared) continue;
orCondition.Conditions.Add(new DmlfNotEqualWithNullTestCondition
{
LeftExpr = column.CreateCompareExpression(column.CreateSourceExpression(SourceJoinModel, false)),
RightExpr = column.CreateCompareExpression(column.CreateTargetExpression("target")),
CollateSpec = column.UseCollate(SourceJoinModel) ? "DATABASE_DEFAULT" : null,
});
}
if (orCondition.Conditions.Any()) cmd.AddAndCondition(orCondition);
if (!cmd.Columns.Any()) return null;
return cmd;
}
public virtual bool? UpdateColumn(string name, UpdateColumnContext ctx) => null;
public override bool? UpdateColumn(string name, UpdateColumnContext ctx)
{
if (ctx == UpdateColumnContext.Update) return ModifyColumns.Any(x => x.Name == name);
return false;
}
