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Long Term Support Release

  • Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
  • Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
  • PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.

Differences Between: [Versions 400 and 401]

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File Size: 95 lines (3 kb)
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Defines 1 class

countdistinct:: (5 methods):
  get_name()
  compatible()
  get_column_field_sql()
  get_field_sql()
  format_value()


Class: countdistinct  - X-Ref

Column count distinct aggregation type

get_name()   X-Ref
Return aggregation name

return: lang_string

compatible(int $columntype)   X-Ref
This aggregation can be performed on all column types

param: int $columntype
return: bool

get_column_field_sql(array $sqlfields)   X-Ref
Override base method to ensure all SQL fields are concatenated together if there are multiple

param: array $sqlfields
return: string

get_field_sql(string $field, int $columntype)   X-Ref
Return the aggregated field SQL

param: string $field
param: int $columntype
return: string

format_value($value, array $values, array $callbacks, int $columntype)   X-Ref
Return formatted value for column when applying aggregation

param: mixed $value
param: array $values
param: array $callbacks
param: int $columntype
return: int