Class Sequel::SQLite::Dataset
In: lib/sequel_core/adapters/sqlite.rb
Parent: Sequel::Dataset

Dataset class for SQLite datasets that use the ruby-sqlite3 driver.

Methods

call   explain   fetch_rows   literal   prepare  

Included Modules

::Sequel::SQLite::DatasetMethods

Classes and Modules

Module Sequel::SQLite::Dataset::ArgumentMapper
Module Sequel::SQLite::Dataset::PreparedStatementMethods

Constants

EXPLAIN = 'EXPLAIN %s'.freeze
PREPARED_ARG_PLACEHOLDER = ':'.freeze

Public Instance methods

Prepare an unnamed statement of the given type and call it with the given values.

[Source]

     # File lib/sequel_core/adapters/sqlite.rb, line 189
189:       def call(type, hash, values=nil, &block)
190:         prepare(type, nil, values).call(hash, &block)
191:       end

Return an array of strings specifying a query explanation for the current dataset.

[Source]

     # File lib/sequel_core/adapters/sqlite.rb, line 195
195:       def explain
196:         res = []
197:         @db.result_set(EXPLAIN % select_sql(opts), nil) {|r| res << r}
198:         res
199:       end

Yield a hash for each row in the dataset.

[Source]

     # File lib/sequel_core/adapters/sqlite.rb, line 202
202:       def fetch_rows(sql)
203:         execute(sql) do |result|
204:           @columns = result.columns.map{|c| output_identifier(c)}
205:           column_count = @columns.size
206:           result.each do |values|
207:             row = {}
208:             column_count.times {|i| row[@columns[i]] = values[i]}
209:             yield row
210:           end
211:         end
212:       end

Use the ISO format for dates and timestamps, and quote strings using the ::SQLite3::Database.quote method.

[Source]

     # File lib/sequel_core/adapters/sqlite.rb, line 216
216:       def literal(v)
217:         case v
218:         when LiteralString
219:           v
220:         when String
221:           "'#{::SQLite3::Database.quote(v)}'"
222:         when Time
223:           literal(v.iso8601)
224:         when Date, DateTime
225:           literal(v.to_s)
226:         else
227:           super
228:         end
229:       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.

[Source]

     # File lib/sequel_core/adapters/sqlite.rb, line 234
234:       def prepare(type, name=nil, values=nil)
235:         ps = to_prepared_statement(type, values)
236:         ps.extend(PreparedStatementMethods)
237:         db.prepared_statements[name] = ps if name
238:         ps
239:       end

[Validate]