Class: Sequel::SQLite::Dataset

Inherits:
Dataset
  • Object
show all
Includes:
DatasetMethods
Defined in:
lib/sequel/adapters/sqlite.rb

Defined Under Namespace

Modules: ArgumentMapper

Constant Summary collapse

BindArgumentMethods = 
prepared_statements_module(:bind, ArgumentMapper)
PreparedStatementMethods = 
prepared_statements_module(:prepare, BindArgumentMethods)

Constants included from DatasetMethods

Sequel::SQLite::DatasetMethods::CONSTANT_MAP, Sequel::SQLite::DatasetMethods::EXTRACT_MAP, Sequel::SQLite::DatasetMethods::INSERT_CONFLICT_RESOLUTIONS

Instance Method Summary collapse

Methods included from DatasetMethods

#cast_sql_append, #constant_sql_append, #delete, #empty?, #explain, #having, #insert_conflict, #insert_ignore, #insert_select, #insert_select_sql, #quoted_identifier_append, #returning, #select, #supports_cte?, #supports_cte_in_subqueries?, #supports_deleting_joins?, #supports_derived_column_lists?, #supports_intersect_except_all?, #supports_is_true?, #supports_modifying_joins?, #supports_multiple_column_in?, #supports_returning?, #supports_timestamp_timezones?, #supports_where_true?, #supports_window_clause?, #supports_window_function_frame_option?, #supports_window_functions?

Instance Method Details

#complex_expression_sql_append(sql, op, args) ⇒ Object

Support regexp functions if using :setup_regexp_function Database option.



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# File 'lib/sequel/adapters/sqlite.rb', line 399

def complex_expression_sql_append(sql, op, args)
  case op
  when :~, :'!~', :'~*', :'!~*'
    return super unless supports_regexp?

    case_insensitive = [:'~*', :'!~*'].include?(op)
    sql << 'NOT ' if [:'!~', :'!~*'].include?(op)
    sql << '('
    sql << 'LOWER(' if case_insensitive
    literal_append(sql, args[0])
    sql << ')' if case_insensitive
    sql << ' REGEXP '
    sql << 'LOWER(' if case_insensitive
    literal_append(sql, args[1])
    sql << ')' if case_insensitive
    sql << ')'
  else
    super
  end
end

#fetch_rows(sql) ⇒ Object 



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# File 'lib/sequel/adapters/sqlite.rb', line 420

def fetch_rows(sql)
  execute(sql) do |result|
    cps = db.conversion_procs
    type_procs = result.types.map{|t| cps[base_type_name(t)]}
    j = -1
    cols = result.columns.map{|c| [output_identifier(c), type_procs[(j+=1)]]}
    self.columns = cols.map(&:first)
    max = cols.length
    result.each do |values|
      row = {}
      i = -1
      while (i += 1) < max
        name, type_proc = cols[i]
        v = values[i]
        if type_proc && v
          v = type_proc.call(v)
        end
        row[name] = v
      end
      yield row
    end
  end
end

#supports_regexp? ⇒ Boolean

Support regexp if using :setup_regexp_function Database option.

Returns:

  • (Boolean) 


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# File 'lib/sequel/adapters/sqlite.rb', line 445

def supports_regexp?
  db.allow_regexp?
end