private IEnumerable <InsertStatement> BuildStatements(IEntityMetadata entity, SchemaMember owner, IEnumerable <SchemaMember> schemas)
{
var inherits = entity.GetInherits();
foreach (var inherit in inherits)
{
var statement = new InsertStatement(inherit, owner);
foreach (var schema in schemas)
{
if (!inherit.Properties.Contains(schema.Name))
{
continue;
}
if (schema.Token.Property.IsSimplex)
{
var simplex = (IEntitySimplexPropertyMetadata)schema.Token.Property;
if (simplex.Sequence != null && simplex.Sequence.IsBuiltin)
{
statement.Sequence = new SelectStatement(owner?.FullPath);
statement.Sequence.Select.Members.Add(SequenceExpression.Current(simplex.Sequence.Name, simplex.Name));
}
else
{
var field = statement.Table.CreateField(schema.Token);
statement.Fields.Add(field);
var parameter = this.IsLinked(owner, simplex) ?
Expression.Parameter(schema.Token.Property.Name, simplex.Type) :
Expression.Parameter(ParameterExpression.Anonymous, schema, field);
statement.Values.Add(parameter);
statement.Parameters.Add(parameter);
}
}
else
{
if (!schema.HasChildren)
{
throw new DataException($"Missing members that does not specify '{schema.FullPath}' complex property.");
}
var complex = (IEntityComplexPropertyMetadata)schema.Token.Property;
var slaves = this.BuildStatements(complex.Foreign, schema, schema.Children);
foreach (var slave in slaves)
{
slave.Schema = schema;
statement.Slaves.Add(slave);
}
}
}
yield return(statement);
}
}
private static IEnumerable <InsertStatement> BuildInserts(IDataMutateContextBase context, IDataEntity entity, SchemaMember owner, IEnumerable <SchemaMember> schemas)
{
var inherits = entity.GetInherits();
foreach (var inherit in inherits)
{
var statement = new InsertStatement(inherit, owner);
foreach (var schema in schemas)
{
if (!inherit.Properties.Contains(schema.Name))
{
continue;
}
if (schema.Token.Property.IsSimplex)
{
var simplex = (IDataEntitySimplexProperty)schema.Token.Property;
if (simplex.Sequence != null && simplex.Sequence.IsBuiltin)
{
statement.Sequence = new SelectStatement(owner?.FullPath);
statement.Sequence.Select.Members.Add(SequenceExpression.Current(simplex.Sequence.Name, simplex.Name));
}
else
{
//确认当前成员是否有提供的写入值
var provided = context.Validate(DataAccessMethod.Insert, simplex, out var value);
var field = statement.Table.CreateField(schema.Token);
statement.Fields.Add(field);
var parameter = Utility.IsLinked(owner, simplex) ?
(
provided ?
Expression.Parameter(schema.Token.Property.Name, simplex.Type, value) :
Expression.Parameter(schema.Token.Property.Name, simplex.Type)
) :
(
provided ?
Expression.Parameter(field, schema, value) :
Expression.Parameter(field, schema)
);
statement.Values.Add(parameter);
statement.Parameters.Add(parameter);
}
}
else
{
if (!schema.HasChildren)
{
throw new DataException($"Missing members that does not specify '{schema.FullPath}' complex property.");
}
//不可变复合属性不支持任何写操作，即在新增操作中不能包含不可变复合属性
if (schema.Token.Property.Immutable)
{
throw new DataException($"The '{schema.FullPath}' is an immutable complex(navigation) property and does not support the insert operation.");
}
var complex = (IDataEntityComplexProperty)schema.Token.Property;
//注：在构建一对多的导航属性的UPSERT语句时不能指定容器数据(即data参数值为空)，因为批量操作语句不支持在构建阶段绑定到具体数据
var upserts = UpsertStatementBuilder.BuildUpserts(context, complex.Foreign, (context.IsMultiple ? null : context.Data), schema, schema.Children);
//将新建的语句加入到主语句的从属集中
foreach (var upsert in upserts)
{
statement.Slaves.Add(upsert);
}
//var slaves = BuildInserts(context, complex.Foreign, schema, schema.Children);
//foreach(var slave in slaves)
//{
// slave.Schema = schema;
// statement.Slaves.Add(slave);
//}
}
}
if (statement.Fields.Count > 0)
{
yield return(statement);
}
}
}
private IEnumerable <IMutateStatement> BuildStatements(DataInsertContext context, IDataEntity entity, SchemaMember owner, IEnumerable <SchemaMember> schemas)
{
var inherits = entity.GetInherits();
foreach (var inherit in inherits)
{
var statement = new InsertStatement(inherit, owner);
foreach (var schema in schemas)
{
if (!inherit.Properties.Contains(schema.Name))
{
continue;
}
if (schema.Token.Property.IsSimplex)
{
var simplex = (IDataEntitySimplexProperty)schema.Token.Property;
if (simplex.Sequence != null && simplex.Sequence.IsBuiltin)
{
statement.Sequence = new SelectStatement(owner?.FullPath);
statement.Sequence.Select.Members.Add(SequenceExpression.Current(simplex.Sequence.Name, simplex.Name));
}
else
{
//确认当前成员是否有提供的写入值
var provided = context.Validate(simplex, out var value);
var field = statement.Table.CreateField(schema.Token);
statement.Fields.Add(field);
var parameter = this.IsLinked(owner, simplex) ?
Expression.Parameter(schema.Token.Property.Name, simplex.Type) :
(
provided ?
Expression.Parameter(field, schema, value) :
Expression.Parameter(field, schema)
);
statement.Values.Add(parameter);
statement.Parameters.Add(parameter);
}
}
else
{
if (!schema.HasChildren)
{
throw new DataException($"Missing members that does not specify '{schema.FullPath}' complex property.");
}
//不可变复合属性不支持任何写操作，即在新增操作中不能包含不可变复合属性
if (schema.Token.Property.Immutable)
{
throw new DataException($"The '{schema.FullPath}' is an immutable complex(navigation) property and does not support the insert operation.");
}
var complex = (IDataEntityComplexProperty)schema.Token.Property;
var slaves = this.BuildStatements(context, complex.Foreign, schema, schema.Children);
foreach (var slave in slaves)
{
slave.Schema = schema;
statement.Slaves.Add(slave);
}
}
}
if (statement.Fields.Count > 0)
{
yield return(statement);
}
}
}
