private TableAnalyser GetLoadedConstraints(TableStructure table)
{
{
var res = (TableAnalyser)AnalyserCache.GetTableAnalyser("constraints");
if (res != null)
{
return(res);
}
res = (TableAnalyser)AnalyserCache.GetTableAnalyser("constraints:" + table.FullName.ToString());
if (res != null)
{
return(res);
}
}
InformationSchema ins = InformationSchema.LoadSchemaOnce(GetDbConn, m_conn.GetConnKey());
if (m_members.TableFilter != null && m_members.TableFilter.Count == 1)
{
// load constraint for one table
TableAnalyser ta = new TableAnalyser();
ConstraintsLoader loader = new ConstraintsLoader(GetDbConn(), ins, ta, table.FullName, m_members.TableMembers & GetConstraintLoadMode(), GetDbNameCondition());
loader.Run();
AnalyserCache.PutTableAnalyser("constraints:" + table.FullName.ToString(), ta);
return(ta);
}
else
{
// load constraints for all tables
TableAnalyser ta = new TableAnalyser();
ConstraintsLoader loader = new ConstraintsLoader(GetDbConn(), ins, ta, null, m_members.TableMembers & GetConstraintLoadMode(), GetDbNameCondition());
loader.Run();
AnalyserCache.PutTableAnalyser("constraints", ta);
return(ta);
}
}
public override string Generate(ConstraintsLoader loader, string table, ref bool cancel)
{
StringBuilder sb = new StringBuilder();
bool wascond = false;
sb.Append("(");
foreach (Condition cond in Conditions)
{
string conds = cond.Generate(loader, table, ref cancel);
if (cancel)
{
return(null);
}
if (conds == null)
{
continue;
}
if (wascond)
{
sb.Append(" " + SqlName + " ");
}
sb.Append(conds);
wascond = true;
}
sb.Append(")");
if (!wascond)
{
return(null);
}
return(sb.ToString());
}
public override string Generate(ConstraintsLoader loader, string table, ref bool cancel)
{
if (!loader.m_infoSchema.HasColumn(table, m_name))
{
if (m_mandatory)
{
cancel = true;
}
return(null);
}
return(String.Format("{0}='{1}'", m_name, m_value));
}
public override string Generate(ConstraintsLoader loader, string table, ref bool cancel)
{
if (m_schema == null)
{
return(null);
}
if (loader.m_infoSchema.HasColumn(table, "table_schema"))
{
return(String.Format("table_schema='{0}'", m_schema));
}
if (loader.m_infoSchema.HasColumn(table, "constraint_schema"))
{
return(String.Format("constraint_schema='{0}'", m_schema));
}
return(null);
}
public abstract string Generate(ConstraintsLoader loader, string table, ref bool cancel);
