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 202 202: def explain 203: res = [] 204: @db.result_set(EXPLAIN % select_sql(opts), nil) {|r| res << r} 205: res 206: end
Yield a hash for each row in the dataset.
# File lib/sequel/adapters/sqlite.rb, line 209 209: def fetch_rows(sql) 210: execute(sql) do |result| 211: @columns = result.columns.map{|c| output_identifier(c)} 212: column_count = @columns.size 213: result.each do |values| 214: row = {} 215: column_count.times {|i| row[@columns[i]] = values[i]} 216: yield row 217: end 218: end 219: 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 224 224: def prepare(type, name=nil, values=nil) 225: ps = to_prepared_statement(type, values) 226: ps.extend(PreparedStatementMethods) 227: db.prepared_statements[name] = ps if name 228: ps 229: end