/// <inheritdoc />
protected override Expression VisitDistinctSql(DistinctSqlExpression distinctSqlExpression)
{
Check.NotNull(distinctSqlExpression, nameof(distinctSqlExpression));
_relationalCommandBuilder.Append("DISTINCT (");
Visit(distinctSqlExpression.Operand);
_relationalCommandBuilder.Append(")");
return(distinctSqlExpression);
}
/// <inheritdoc />
public virtual SqlExpression ApplyTypeMapping(SqlExpression sqlExpression, RelationalTypeMapping typeMapping)
{
#pragma warning disable IDE0046 // Convert to conditional expression
if (sqlExpression == null
#pragma warning restore IDE0046 // Convert to conditional expression
|| sqlExpression.TypeMapping != null)
{
return(sqlExpression);
}
return(sqlExpression switch
{
CaseExpression e => ApplyTypeMappingOnCase(e, typeMapping),
CollateExpression e => ApplyTypeMappingOnCollate(e, typeMapping),
DistinctSqlExpression e => ApplyTypeMappingOnDistinctSql(e, typeMapping),
LikeExpression e => ApplyTypeMappingOnLike(e),
SqlBinaryExpression e => ApplyTypeMappingOnSqlBinary(e, typeMapping),
SqlUnaryExpression e => ApplyTypeMappingOnSqlUnary(e, typeMapping),
SqlConstantExpression e => e.ApplyTypeMapping(typeMapping),
SqlFragmentExpression e => e,
SqlFunctionExpression e => e.ApplyTypeMapping(typeMapping),
SqlParameterExpression e => e.ApplyTypeMapping(typeMapping),
_ => sqlExpression
});
/// <summary> /// Visits the children of the distinct SQL expression. /// </summary> /// <param name="distinctSqlExpression"> The expression to visit. </param> /// <returns> The modified expression, if it or any subexpression was modified; otherwise, returns the original expression. </returns> protected abstract Expression VisitDistinctSql([NotNull] DistinctSqlExpression distinctSqlExpression);
