class Sequel::Mysql2::Dataset
Dataset class for MySQL datasets accessed via the native driver.
Constants
- PreparedStatementMethods
- STREAMING_SUPPORTED
Public Instance Methods
fetch_rows(sql) { |h| ... }
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Yield all rows matching this dataset.
# File lib/sequel/adapters/mysql2.rb, line 248 def fetch_rows(sql) execute(sql) do |r| self.columns = r.fields.map!{|c| output_identifier(c.to_s)} r.each(:cast_booleans=>convert_tinyint_to_bool?){|h| yield h} end self end
paged_each(opts=OPTS, &block)
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Use streaming to implement paging if Mysql2 supports it.
Calls superclass method
Sequel::Dataset#paged_each
# File lib/sequel/adapters/mysql2.rb, line 257 def paged_each(opts=OPTS, &block) if STREAMING_SUPPORTED stream.each(&block) else super end end
stream()
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Return a clone of the dataset that will stream rows when iterating over the result set, so it can handle large datasets that won't fit in memory (Requires mysql 0.3.12+ to have an effect).
# File lib/sequel/adapters/mysql2.rb, line 268 def stream clone(:stream=>true) end
Private Instance Methods
bound_variable_modules()
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# File lib/sequel/adapters/mysql2.rb, line 290 def bound_variable_modules [PreparedStatementMethods] end
convert_tinyint_to_bool?()
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Whether to cast tinyint(1) columns to integer instead of boolean. By default, uses the opposite of the database's convert_tinyint_to_bool setting. Exists for compatibility with the mysql adapter.
# File lib/sequel/adapters/mysql2.rb, line 277 def convert_tinyint_to_bool? @db.convert_tinyint_to_bool end
execute(sql, opts=OPTS)
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Set the :type option to :select if it hasn't been set.
Calls superclass method
Sequel::Dataset#execute
# File lib/sequel/adapters/mysql2.rb, line 282 def execute(sql, opts=OPTS) opts = Hash[opts] opts[:type] = :select opts[:stream] = @opts[:stream] super end
literal_string_append(sql, v)
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Handle correct quoting of strings using ::Mysql2::Client#escape.
# File lib/sequel/adapters/mysql2.rb, line 300 def literal_string_append(sql, v) s = db.synchronize(@opts[:server]){|c| c.escape(v)} sql << APOS << s << APOS end
prepared_statement_modules()
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# File lib/sequel/adapters/mysql2.rb, line 294 def prepared_statement_modules [PreparedStatementMethods] end