Public Instance methods
fetch_rows(sql)
Yield all rows matching this dataset. If the dataset is set to split multiple statements, yield arrays of hashes one per statement instead of yielding results for all statements as hashes.
[show source]
# File lib/sequel/adapters/mysql.rb 305 def fetch_rows(sql) 306 execute(sql) do |r| 307 i = -1 308 cps = db.conversion_procs 309 cols = r.fetch_fields.map do |f| 310 # Pretend tinyint is another integer type if its length is not 1, to 311 # avoid casting to boolean if convert_tinyint_to_bool is set. 312 type_proc = f.type == 1 && cast_tinyint_integer?(f) ? cps[2] : cps[f.type] 313 [output_identifier(f.name), type_proc, i+=1] 314 end 315 self.columns = cols.map(&:first) 316 if opts[:split_multiple_result_sets] 317 s = [] 318 yield_rows(r, cols){|h| s << h} 319 yield s 320 else 321 yield_rows(r, cols){|h| yield h} 322 end 323 end 324 self 325 end
graph(*)
Don’t allow graphing a dataset that splits multiple statements
[show source]
# File lib/sequel/adapters/mysql.rb 328 def graph(*) 329 raise(Error, "Can't graph a dataset that splits multiple result sets") if opts[:split_multiple_result_sets] 330 super 331 end
split_multiple_result_sets()
Makes each yield arrays of rows, with each array containing the rows for a given result set. Does not work with graphing. So you can submit SQL with multiple statements and easily determine which statement returned which results.
Modifies the row_proc of the returned dataset so that it still works as expected (running on the hashes instead of on the arrays of hashes). If you modify the row_proc afterward, note that it will receive an array of hashes instead of a hash.
[show source]
# File lib/sequel/adapters/mysql.rb 342 def split_multiple_result_sets 343 raise(Error, "Can't split multiple statements on a graphed dataset") if opts[:graph] 344 ds = clone(:split_multiple_result_sets=>true) 345 ds = ds.with_row_proc(proc{|x| x.map{|h| row_proc.call(h)}}) if row_proc 346 ds 347 end