问题描述
我已经在我的 C# 代码中加载了两个数据库的架构,在比较它们之后,我将缺少的功能添加到第一个架构中。 现在我想将该架构更新回 sql Server。怎么做?我可以从现有架构创建架构吗?
这是我尝试过的:
public static void Compare(ref DbMetaData dbSchema,ref DbMetaData dbSchema2)
{
foreach (var schemaGroup in dbSchema.SchemasDic.Values )
{
DbUserSchemaInfo schemaGroup2=dbSchema2.SchemasDic.Values.First(sc => sc.SchemaName == schemaGroup.SchemaName);
foreach (var x in schemaGroup.TablesDic)
{
var y = schemaGroup2.TablesDic.First(sc => sc.Value.TableName == x.Value.TableName);
// GET the difference in columns
var colDiff = x.Value.Columns.Except(y.Value.Columns);
// GET the difference in indexes
var indexDiff = x.Value.Indexes.Except(y.Value.Indexes);
// GET the difference in constraints
var constraintDiff = x.Value.DfConstraints.Except(y.Value.DfConstraints);
// GET the difference in Fk
var foreignKeysDiff = x.Value.ForeignKeys.Except(y.Value.ForeignKeys);
//check if a primary key exists
var primaryKeysDiff = y.Value.PrimaryKey == null ? x.Value.PrimaryKey : null;
// GET the difference in triggers
var triggersDiff = x.Value.Triggers.Except(y.Value.Triggers);
//merge the difference
if (indexDiff.Count() != 0)
{
foreach (var index in indexDiff)
{
y.Value.AddTableIndex(index.Value);
}
}
if (constraintDiff.Count() != 0)
{
foreach (var constraint in constraintDiff)
{
y.Value.AddDefaultConstraint(constraint.Value);
}
}
if (foreignKeysDiff.Count() != 0)
{
foreach (var foreignKey in foreignKeysDiff)
{
y.Value.AddFk(foreignKey.Value);
}
}
if (triggersDiff.Count() != 0)
{
foreach (var trigger in triggersDiff)
{
y.Value.AddTableTrigger(trigger.Value);
}
}
}
}
//Update DbSchema in sqlserver
}
解决方法
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