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BSL238 — Overuse "Reference" in a query

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Summary

Overuse "Reference" in a query

Identifiers

Field Value
Rule code BSL238
Compatible alias RefOveruse
Severity INFORMATION
Enabled by default Yes
Implemented Yes
Tags performance, readability

Behavior

  • The public identifier BSL238 and alias RefOveruse are stable.
  • The rule reports the cases documented on this page.
  • Suppressions and project configuration are applied before publication.
  • The rule requires neither an external analyzer nor network access.

Configuration and suppression

BSL### is the primary stable identifier. The compatible alias is accepted in select, ignore, and compatible block suppression comments.

[tool.onec-hbk-bsl]
select = ["BSL238"]
ignore = ["RefOveruse"]

All three suppression families support both a current line and a range. When an opening comment follows code, it affects only that line. Use any one form:

  • noqa:
Value = "example";  // noqa: BSL238
  • bsl-disable:
Value = "example";  // bsl-disable: BSL238
  • compatible BSLLS form:
Value = "example";  // BSLLS:RefOveruse-off

When the same opening comment is on a line by itself, it starts a range. Close it with the matching marker from the same family:

// noqa: BSL238
// code without this diagnostic
// noqa-enable: BSL238

// bsl-disable: BSL238
// code without this diagnostic
// bsl-enable: BSL238

// BSLLS:RefOveruse-off
// code without this diagnostic
// BSLLS:RefOveruse-on

To disable the rule until the end of the file, omit the closing noqa-enable, bsl-enable, or BSLLS:…-on marker.

Opening and closing markers must belong to the same family.

Description

Using ".Ref" to a field of a reference type will result in an implicit left join with the source table of this field, and it has no value, but only generates excessive load on the DBMS.

Examples

Query.Text = "Select Files.File.Ref, // error
   | Files.File
   | From
   | InternalFiles AS Files";

Sources