Class Sequel::MySQL::Dataset
In: lib/sequel_core/adapters/mysql.rb
Parent: Sequel::Dataset

Dataset class for MySQL datasets accessed via the native driver.

Methods

call   delete   fetch_rows   insert   literal   prepare   replace   update  

Included Modules

Sequel::MySQL::DatasetMethods StoredProcedures

Classes and Modules

Module Sequel::MySQL::Dataset::CallableStatementMethods
Module Sequel::MySQL::Dataset::PreparedStatementMethods
Module Sequel::MySQL::Dataset::StoredProcedureMethods

Public Instance methods

MySQL is different in that it supports prepared statements but not bound variables outside of prepared statements. The default implementation breaks the use of subselects in prepared statements, so extend the temporary prepared statement that this creates with a module that fixes it.

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 261
261:       def call(type, bind_arguments={}, values=nil)
262:         ps = to_prepared_statement(type, values)
263:         ps.extend(CallableStatementMethods)
264:         ps.call(bind_arguments)
265:       end

Delete rows matching this dataset

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 268
268:       def delete(opts = nil)
269:         execute_dui(delete_sql(opts)){|c| c.affected_rows}
270:       end

Yield all rows matching this dataset

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 273
273:       def fetch_rows(sql)
274:         execute(sql) do |r|
275:           column_types = []
276:           @columns = r.fetch_fields.map{|f| column_types << f.type; output_identifier(f.name)}
277:           while row = r.fetch_row
278:             h = {}
279:             @columns.each_with_index {|f, i| h[f] = convert_type(row[i], column_types[i])}
280:             yield h
281:           end
282:         end
283:         self
284:       end

Insert a new value into this dataset

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 287
287:       def insert(*values)
288:         execute_dui(insert_sql(*values)){|c| c.insert_id}
289:       end

Handle correct quoting of strings using ::MySQL.quote.

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 292
292:       def literal(v)
293:         case v
294:         when LiteralString
295:           v
296:         when String
297:           "'#{::Mysql.quote(v)}'"
298:         else
299:           super
300:         end
301:       end

Store the given type of prepared statement in the associated database with the given name.

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 305
305:       def prepare(type, name=nil, values=nil)
306:         ps = to_prepared_statement(type, values)
307:         ps.extend(PreparedStatementMethods)
308:         if name
309:           ps.prepared_statement_name = name
310:           db.prepared_statements[name] = ps
311:         end
312:         ps
313:       end

Replace (update or insert) the matching row.

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 316
316:       def replace(*args)
317:         execute_dui(replace_sql(*args)){|c| c.insert_id}
318:       end

Update the matching rows.

[Source]

     # File lib/sequel_core/adapters/mysql.rb, line 321
321:       def update(*args)
322:         execute_dui(update_sql(*args)){|c| c.affected_rows}
323:       end

[Validate]