protected virtual SqlExpression <T> InternalJoin(string joinType, Expression joinExpr, ModelDefinition sourceDef, ModelDefinition targetDef, TableOptions options = null)
{
PrefixFieldWithTableName = true;
Reset();
var joinFormat = options?.JoinFormat;
if (options?.Alias != null) //Set joinAlias
{
options.ParamName = joinExpr is LambdaExpression l && l.Parameters.Count == 2
? l.Parameters[1].Name
: null;
if (options.ParamName != null)
{
joinFormat = null;
options.ModelDef = targetDef;
joinAlias = options;
}
}
if (!tableDefs.Contains(sourceDef))
{
tableDefs.Add(sourceDef);
}
if (!tableDefs.Contains(targetDef))
{
tableDefs.Add(targetDef);
}
var isCrossJoin = "CROSS JOIN" == joinType;
var sqlExpr = joinExpr != null
? InternalCreateSqlFromExpression(joinExpr, isCrossJoin)
: InternalCreateSqlFromDefinitions(sourceDef, targetDef, isCrossJoin);
var joinDef = tableDefs.Contains(targetDef) && !tableDefs.Contains(sourceDef)
? sourceDef
: targetDef;
FromExpression += joinFormat != null
? $" {joinType} {joinFormat(DialectProvider, joinDef, sqlExpr)}"
: joinAlias != null
? $" {joinType} {SqlTable(joinDef)} AS {DialectProvider.GetQuotedName(joinAlias.Alias)} {sqlExpr}"
: $" {joinType} {SqlTable(joinDef)} {sqlExpr}";
if (joinAlias != null) //Unset joinAlias
{
joinAlias = null;
if (options != null)
{
options.ParamName = null;
options.ModelDef = null;
}
}
return(this);
}
public override string ToString()
{
var text = SelectExpression;
if (!string.IsNullOrEmpty(Alias)) // Note that even though Alias must be non-empty in the constructor it may be set to null/empty later
{
text += " AS " + DialectProvider.GetQuotedName(Alias);
}
return(text);
}
public override string ToString()
{
var text = DialectProvider.GetQuotedColumnName(ColumnName);
if (!string.IsNullOrEmpty(QuotedTableAlias))
{
text = QuotedTableAlias + "." + text;
}
if (!string.IsNullOrEmpty(Alias))
{
text += " AS " + DialectProvider.GetQuotedName(Alias);
}
return(text);
}
