yiisoft/yii2

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framework/db/mssql/Schema.php

Summary

Maintainability
C
1 day
Test Coverage

The class Schema has an overall complexity of 80 which is very high. The configured complexity threshold is 50.
Open

class Schema extends \yii\db\Schema implements ConstraintFinderInterface
{
    use ViewFinderTrait;
    use ConstraintFinderTrait;

Severity: Minor
Found in framework/db/mssql/Schema.php by phpmd

Since: PHPMD 0.2.5

The Weighted Method Count (WMC) of a class is a good indicator of how much time and effort is required to modify and maintain this class. The WMC metric is defined as the sum of complexities of all methods declared in a class. A large number of methods also means that this class has a greater potential impact on derived classes.

Example:

class Foo {
      public function bar() {
          if ($a == $b)  {
              if ($a1 == $b1) {
                  fiddle();
              } elseif ($a2 == $b2) {
                  fiddle();
              } else {
              }
          }
      }
      public function baz() {
          if ($a == $b) {
              if ($a1 == $b1) {
                  fiddle();
              } elseif ($a2 == $b2) {
                  fiddle();
              } else {
              }
          }
      }
      // Several other complex methods
  }

Source: http://phpmd.org/rules/codesize.txt

Function loadColumnSchema has a Cognitive Complexity of 23 (exceeds 5 allowed). Consider refactoring.
Open

    protected function loadColumnSchema($info)
    {
        $column = $this->createColumnSchema();

        $column->name = $info['column_name'];
Severity: Minor
Found in framework/db/mssql/Schema.php - About 3 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function findColumns has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
Open

    protected function findColumns($table)
    {
        $columnsTableName = 'INFORMATION_SCHEMA.COLUMNS';
        $whereSql = "[t1].[table_name] = " . $this->db->quoteValue($table->name);
        if ($table->catalogName !== null) {
Severity: Minor
Found in framework/db/mssql/Schema.php - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function loadTableConstraints has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

    private function loadTableConstraints($tableName, $returnType)
    {
        static $sql = <<<'SQL'
SELECT
    [o].[name] AS [name],
Severity: Minor
Found in framework/db/mssql/Schema.php - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

The method loadColumnSchema() has an NPath complexity of 496. The configured NPath complexity threshold is 200.
Open

    protected function loadColumnSchema($info)
    {
        $column = $this->createColumnSchema();

        $column->name = $info['column_name'];
Severity: Minor
Found in framework/db/mssql/Schema.php by phpmd

Since: PHPMD 0.1

The NPath complexity of a method is the number of acyclic execution paths through that method. A threshold of 200 is generally considered the point where measures should be taken to reduce complexity.

Example:

class Foo {
      function bar() {
          // lots of complicated code
      }
  }

Source: http://phpmd.org/rules/codesize.txt

The method loadTableConstraints() has 104 lines of code. Current threshold is set to 100. Avoid really long methods.
Open

    private function loadTableConstraints($tableName, $returnType)
    {
        static $sql = <<<'SQL'
SELECT
    [o].[name] AS [name],
Severity: Minor
Found in framework/db/mssql/Schema.php by phpmd

The method loadColumnSchema() has a Cyclomatic Complexity of 16. The configured cyclomatic complexity threshold is 10.
Open

    protected function loadColumnSchema($info)
    {
        $column = $this->createColumnSchema();

        $column->name = $info['column_name'];
Severity: Minor
Found in framework/db/mssql/Schema.php by phpmd

Since: PHPMD 0.1

Complexity is determined by the number of decision points in a method plus one for the method entry. The decision points are 'if', 'while', 'for', and 'case labels'. Generally, 1-4 is low complexity, 5-7 indicates moderate complexity, 8-10 is high complexity, and 11+ is very high complexity.

Example:

// Cyclomatic Complexity = 11
  class Foo {
  1   public function example() {
  2       if ($a == $b) {
  3           if ($a1 == $b1) {
                  fiddle();
  4           } elseif ($a2 == $b2) {
                  fiddle();
              } else {
                  fiddle();
              }
  5       } elseif ($c == $d) {
  6           while ($c == $d) {
                  fiddle();
              }
  7        } elseif ($e == $f) {
  8           for ($n = 0; $n < $h; $n++) {
                  fiddle();
              }
          } else {
              switch ($z) {
  9               case 1:
                      fiddle();
                      break;
  10              case 2:
                      fiddle();
                      break;
  11              case 3:
                      fiddle();
                      break;
                  default:
                      fiddle();
                      break;
              }
          }
      }
  }

Source: http://phpmd.org/rules/codesize.txt

The method findColumns() has a Cyclomatic Complexity of 10. The configured cyclomatic complexity threshold is 10.
Open

    protected function findColumns($table)
    {
        $columnsTableName = 'INFORMATION_SCHEMA.COLUMNS';
        $whereSql = "[t1].[table_name] = " . $this->db->quoteValue($table->name);
        if ($table->catalogName !== null) {
Severity: Minor
Found in framework/db/mssql/Schema.php by phpmd

Since: PHPMD 0.1

Complexity is determined by the number of decision points in a method plus one for the method entry. The decision points are 'if', 'while', 'for', and 'case labels'. Generally, 1-4 is low complexity, 5-7 indicates moderate complexity, 8-10 is high complexity, and 11+ is very high complexity.

Example:

// Cyclomatic Complexity = 11
  class Foo {
  1   public function example() {
  2       if ($a == $b) {
  3           if ($a1 == $b1) {
                  fiddle();
  4           } elseif ($a2 == $b2) {
                  fiddle();
              } else {
                  fiddle();
              }
  5       } elseif ($c == $d) {
  6           while ($c == $d) {
                  fiddle();
              }
  7        } elseif ($e == $f) {
  8           for ($n = 0; $n < $h; $n++) {
                  fiddle();
              }
          } else {
              switch ($z) {
  9               case 1:
                      fiddle();
                      break;
  10              case 2:
                      fiddle();
                      break;
  11              case 3:
                      fiddle();
                      break;
                  default:
                      fiddle();
                      break;
              }
          }
      }
  }

Source: http://phpmd.org/rules/codesize.txt

Identical blocks of code found in 2 locations. Consider refactoring.
Open

            if (!empty($matches[2])) {
                $values = explode(',', $matches[2]);
                $column->size = $column->precision = (int)$values[0];
                if (isset($values[1])) {
                    $column->scale = (int)$values[1];
Severity: Major
Found in framework/db/mssql/Schema.php and 1 other location - About 5 hrs to fix
framework/db/sqlite/Schema.php on lines 326..341

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 152.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

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