protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var statement = mergeContext.Merge;
var operation = new SqlMergeOperationClause(MergeOperationType.Insert);
statement.Operations.Add(operation);
var predicate = methodCall.Arguments[1];
var setter = methodCall.Arguments[2];
if (!(setter is ConstantExpression constSetter) || constSetter.Value != null)
{
var setterExpression = (LambdaExpression)setter.Unwrap();
mergeContext.AddSourceParameter(setterExpression.Parameters[0]);
UpdateBuilder.BuildSetterWithContext(
builder,
buildInfo,
setterExpression,
mergeContext.TargetContext,
operation.Items,
mergeContext.SourceContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
// UpdateWhenMatchedAndThenDelete(merge, searchCondition, setter, deleteCondition)
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var statement = mergeContext.Merge;
var operation = new SqlMergeOperationClause(MergeOperationType.UpdateWithDelete);
statement.Operations.Add(operation);
var predicate = methodCall.Arguments[1];
var setter = methodCall.Arguments[2];
var deletePredicate = methodCall.Arguments[3];
if (!(setter is ConstantExpression constSetter) || constSetter.Value != null)
{
var setterExpression = (LambdaExpression)setter.Unwrap();
UpdateBuilder.BuildSetterWithContext(
builder,
buildInfo,
setterExpression,
mergeContext.TargetContext,
operation.Items,
mergeContext.TargetContext, mergeContext.SourceContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
// UpdateWhenMatchedAndThenDelete(merge, searchCondition, setter, deleteCondition)
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var statement = mergeContext.Merge;
var operation = new SqlMergeOperationClause(MergeOperationType.UpdateWithDelete);
statement.Operations.Add(operation);
var predicate = methodCall.Arguments[1];
var setter = methodCall.Arguments[2];
var deletePredicate = methodCall.Arguments[3];
if (!setter.IsNullValue())
{
var setterExpression = (LambdaExpression)setter.Unwrap();
UpdateBuilder.BuildSetterWithContext(
builder,
buildInfo,
setterExpression,
mergeContext.TargetContext,
operation.Items,
mergeContext.TargetContext, mergeContext.SourceContext);
}
else
{
// build setters like QueryRunner.Update
var sqlTable = (SqlTable)statement.Target.Source;
var param = Expression.Parameter(sqlTable.ObjectType, "s");
var keys = sqlTable.GetKeys(false).Cast <SqlField>().ToList();
foreach (var field in sqlTable.Fields.Where(f => f.IsUpdatable).Except(keys))
{
var expression = LinqToDB.Expressions.Extensions.GetMemberGetter(field.ColumnDescriptor.MemberInfo, param);
var tgtExpr = mergeContext.TargetContext.ConvertToSql(builder.ConvertExpression(expression), 1, ConvertFlags.Field)[0].Sql;
var srcExpr = mergeContext.SourceContext.ConvertToSql(builder.ConvertExpression(expression), 1, ConvertFlags.Field)[0].Sql;
operation.Items.Add(new SqlSetExpression(tgtExpr, srcExpr));
}
}
if (!predicate.IsNullValue())
{
var predicateCondition = (LambdaExpression)predicate.Unwrap();
operation.Where = BuildSearchCondition(builder, statement, mergeContext.TargetContext, mergeContext.SourceContext, predicateCondition);
}
if (!deletePredicate.IsNullValue())
{
var deleteCondition = (LambdaExpression)deletePredicate.Unwrap();
operation.WhereDelete = BuildSearchCondition(builder, statement, mergeContext.TargetContext, mergeContext.SourceContext, deleteCondition);;
}
return(mergeContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var kind = MergeKind.Merge;
if (methodCall.IsSameGenericMethod(MergeWithOutputInto))
{
kind = MergeKind.MergeWithOutputInto;
}
else if (methodCall.IsSameGenericMethod(MergeWithOutput))
{
kind = MergeKind.MergeWithOutput;
}
if (kind != MergeKind.Merge)
{
var objectType = methodCall.Method.GetGenericArguments()[0];
var actionField = SqlField.FakeField(new DbDataType(typeof(string)), "$action", false);
var insertedTable = SqlTable.Inserted(objectType);
var deletedTable = SqlTable.Deleted(objectType);
mergeContext.Merge.Output = new SqlOutputClause()
{
InsertedTable = insertedTable,
DeletedTable = deletedTable,
};
var selectQuery = new SelectQuery();
var actionFieldContext = new SingleExpressionContext(null, builder, actionField, selectQuery);
var deletedTableContext = new TableBuilder.TableContext(builder, selectQuery, deletedTable);
var insertedTableConext = new TableBuilder.TableContext(builder, selectQuery, insertedTable);
if (kind == MergeKind.MergeWithOutput)
{
var outputExpression = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var outputContext = new MergeOutputContext(
buildInfo.Parent,
outputExpression,
mergeContext,
actionFieldContext,
deletedTableContext,
insertedTableConext
);
return(outputContext);
}
else
{
var outputExpression = (LambdaExpression)methodCall.Arguments[2].Unwrap();
var outputTable = methodCall.Arguments[1];
var destination = builder.BuildSequence(new BuildInfo(buildInfo, outputTable, new SelectQuery()));
UpdateBuilder.BuildSetterWithContext(
builder,
buildInfo,
outputExpression,
destination,
mergeContext.Merge.Output.OutputItems,
actionFieldContext,
deletedTableContext,
insertedTableConext
);
mergeContext.Merge.Output.OutputTable = ((TableBuilder.TableContext)destination).SqlTable;
}
}
return(mergeContext);
}
protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var statement = mergeContext.Merge;
var operation = new SqlMergeOperationClause(MergeOperationType.Insert);
statement.Operations.Add(operation);
var predicate = methodCall.Arguments[1];
var setter = methodCall.Arguments[2];
if (!setter.IsNullValue())
{
var setterExpression = (LambdaExpression)setter.Unwrap();
mergeContext.AddSourceParameter(setterExpression.Parameters[0]);
UpdateBuilder.BuildSetterWithContext(
builder,
buildInfo,
setterExpression,
mergeContext.TargetContext,
operation.Items,
mergeContext.SourceContext);
}
else
{
// build setters like QueryRunner.Insert
var sqlTable = (SqlTable)statement.Target.Source;
var param = Expression.Parameter(sqlTable.ObjectType, "s");
foreach (var field in sqlTable.Fields)
{
if (field.IsInsertable)
{
var expression = LinqToDB.Expressions.Extensions.GetMemberGetter(field.ColumnDescriptor.MemberInfo, param);
var tgtExpr = mergeContext.TargetContext.ConvertToSql(builder.ConvertExpression(expression), 1, ConvertFlags.Field)[0].Sql;
var srcExpr = mergeContext.SourceContext.ConvertToSql(builder.ConvertExpression(expression), 1, ConvertFlags.Field)[0].Sql;
operation.Items.Add(new SqlSetExpression(tgtExpr, srcExpr));
}
else if (field.IsIdentity)
{
var expr = builder.DataContext.CreateSqlProvider().GetIdentityExpression(sqlTable);
if (expr != null)
{
operation.Items.Add(new SqlSetExpression(field, expr));
}
}
}
}
if (!predicate.IsNullValue())
{
var condition = (LambdaExpression)predicate.Unwrap();
var conditionExpr = builder.ConvertExpression(condition.Body.Unwrap());
operation.Where = new SqlSearchCondition();
builder.BuildSearchCondition(
new ExpressionContext(null, new[] { mergeContext.SourceContext }, condition),
conditionExpr,
operation.Where.Conditions);
}
return(mergeContext);
}
