protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
if (LinqExtensions.UsingMethodInfo1 == methodCall.Method.GetGenericMethodDefinition())
{
var sourceContext = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery()));
var source = new MergeSourceQueryContext(mergeContext.Merge, sourceContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
}
else
{
var enumerableBuildInfo = new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery());
var sourceContext = Find(builder, enumerableBuildInfo, (index, type) =>
{
var query = enumerableBuildInfo.SelectQuery;
var innerQuery = new SelectQuery {
ParentSelect = query
};
var elements = index switch
{
4 => BuildElements(type, (IEnumerable)((ConstantExpression)enumerableBuildInfo.Expression).Value),
_ => throw new InvalidOperationException(),
};
return(new EnumerableContext(builder, enumerableBuildInfo, query, type, elements));
});
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
if (LinqExtensions.UsingMethodInfo1 == methodCall.Method.GetGenericMethodDefinition())
{
var sourceContext = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery()));
var source = new MergeSourceQueryContext(mergeContext.Merge, sourceContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
}
else
{
var enumerableBuildInfo = new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery());
var type = FindType(builder, enumerableBuildInfo);
var sourceContext = new EnumerableContext(builder, enumerableBuildInfo,
enumerableBuildInfo.SelectQuery, type,
builder.ConvertToSql(buildInfo.Parent, enumerableBuildInfo.Expression));
var source = new MergeSourceQueryContext(mergeContext.Merge, sourceContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
}
return(mergeContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var source = new MergeSourceQueryContext(
mergeContext.Merge,
// is it ok to reuse context like that?
mergeContext.TargetContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
return(mergeContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
// MergeInto<TTarget, TSource>(IQueryable<TSource> source, ITable<TTarget> target, string hint)
var sourceContext = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0], new SelectQuery()));
var target = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[1])
{
AssociationsAsSubQueries = true
});
var targetTable = ((TableBuilder.TableContext)target).SqlTable;
var merge = new SqlMergeStatement(targetTable)
{
Hint = (string?)methodCall.Arguments[2].EvaluateExpression()
};
target.SetAlias(merge.Target.Alias !);
target.Statement = merge;
var source = new MergeSourceQueryContext(merge, sourceContext);
return(new MergeContext(merge, target, source));
}