Class | Sequel::SQLite::Dataset |
In: |
lib/sequel/adapters/sqlite.rb
|
Parent: | Sequel::Dataset |
EXPLAIN | = | 'EXPLAIN %s'.freeze |
PREPARED_ARG_PLACEHOLDER | = | ':'.freeze |
Return an array of strings specifying a query explanation for the current dataset.
# File lib/sequel/adapters/sqlite.rb, line 198 198: def explain 199: res = [] 200: @db.result_set(EXPLAIN % select_sql(opts), nil) {|r| res << r} 201: res 202: end
Yield a hash for each row in the dataset.
# File lib/sequel/adapters/sqlite.rb, line 205 205: def fetch_rows(sql) 206: execute(sql) do |result| 207: @columns = result.columns.map{|c| output_identifier(c)} 208: column_count = @columns.size 209: result.each do |values| 210: row = {} 211: column_count.times {|i| row[@columns[i]] = values[i]} 212: yield row 213: end 214: end 215: end
Prepare the given type of query with the given name and store it in the database. Note that a new native prepared statement is created on each call to this prepared statement.
# File lib/sequel/adapters/sqlite.rb, line 220 220: def prepare(type, name=nil, values=nil) 221: ps = to_prepared_statement(type, values) 222: ps.extend(PreparedStatementMethods) 223: db.prepared_statements[name] = ps if name 224: ps 225: end