Class: Gitlab::Pagination::Keyset::InOperatorOptimization::ArrayScopeColumns

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb

Constant Summary collapse

ARRAY_SCOPE_CTE_NAME = 
'array_cte'

Instance Method Summary collapse

Constructor Details

#initialize(columns) ⇒ ArrayScopeColumns

Returns a new instance of ArrayScopeColumns.



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 10

def initialize(columns)
  validate_columns!(columns)

  array_scope_table = Arel::Table.new(ARRAY_SCOPE_CTE_NAME)
  @columns = columns.map do |column|
    column = column.right if column.is_a?(Arel::Nodes::As)
    ColumnData.new(column, "array_scope_#{column}", array_scope_table)
  end
end

Instance Method Details

#arel_columns ⇒ Object 



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 32

def arel_columns
  columns.map(&:arel_column)
end

#array_aggregated_column_names ⇒ Object 



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 28

def array_aggregated_column_names
  columns.map(&:array_aggregated_column_name)
end

#array_aggregated_columns ⇒ Object 



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 24

def array_aggregated_columns
  columns.map(&:array_aggregated_column)
end

#array_lookup_expressions_by_position(table_name) ⇒ Object 



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 36

def array_lookup_expressions_by_position(table_name)
  columns.map do |column|
    Arel.sql("#{table_name}.#{column.array_aggregated_column_name}[position]")
  end
end

#array_scope_cte_name ⇒ Object 



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# File 'lib/gitlab/pagination/keyset/in_operator_optimization/array_scope_columns.rb', line 20

def array_scope_cte_name
  ARRAY_SCOPE_CTE_NAME
end