class Sequel::Mysql2::Dataset
Dataset class for MySQL datasets accessed via the native driver.
Constants
- 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 153 def fetch_rows(sql) execute(sql) do |r| @columns = if identifier_output_method r.fields.map!{|c| output_identifier(c.to_s)} else r.fields end 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 166 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 177 def stream clone(:stream=>true) end
Private Instance Methods
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 186 def convert_tinyint_to_bool? @db.convert_tinyint_to_bool end
execute(sql, opts=OPTS, &block)
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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 191 def execute(sql, opts=OPTS, &block) super(sql, {:type=>:select, :stream=>@opts[:stream]}.merge(opts), &block) 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 196 def literal_string_append(sql, v) sql << APOS << db.synchronize(@opts[:server]){|c| c.escape(v)} << APOS end