diff --git a/vendor/plugins/query-analyzer/README b/vendor/plugins/query-analyzer/README deleted file mode 100644 index 0133f1d..0000000 --- a/vendor/plugins/query-analyzer/README +++ /dev/null @@ -1,96 +0,0 @@ -= Query Analyzer Plugin for MySQL on Rails - -MODIFIED by John Eberly originally take from http://svn.nfectio.us - -The Query Analyzer plugin will expand the usability of your log files -by providing query analysis using the MySQL query execution plan. Each SQL -select query will be 'EXPLAIN'ed and added to the log files right below -the original query. - -Using this plugin and a good understanding of the results, you will be -able to analyze and optimize the queries your application is making. - -Refer to http://www.mysql.org/doc/refman/5.0/en/explain.html for more -information on understanding the results. - -= Installation - -script/plugin install git://github.com/jeberly/query-analyzer.git - -= Example Use - -Here is a real life usage of the plugin that detected the omission of indexes on -a table. In this case, it was a join table and the keys didn't have indexes (silly me!). -Names have been changed to protect the innocent (and make it fit 80 columns) - -# development.log - -P Load (0.008669) - => SELECT p.* FROM p INNER JOIN d ON p.id = d.p_id WHERE (d.p_id = 2 AND ((d.type = 'P'))) - -Analyzing P Load - -select_type | key_len | type | Extra | id | possible_keys | rows | table | ref | key ----------------------------------------------------------------------------------------------------- -SIMPLE | | ALL | Using where | 1 | | 74 | d | | -SIMPLE | 4 | eq_ref | Using where | 1 | PRIMARY | 1 | p | d.p_id | PRIMARY - - -= Analyze the results - -Looking at the results of the execution plan, we can see that the lookup in -the d table is missing an index (possible_keys=null) and performed a full -table scan (type=ALL) to satisfy the WHERE condition. In this case, there was only one -row that matched the condition in the table, but MySQL still had to search all 74 rows -in the table to find it, a key indicator of a missing -or malformed index(es). Once it has pulled all the records to satisfy the WHERE, it then -starts the p table join. This time, it was able to match d.p_id to p.id using -the PRIMARY key on the p table. The type=eq_ref indicates a 1 to 1 match against a primary -or unique column. - -Lets add some indexes to the join table and see if we can cut that full table scan down in the -number of rows it needs to search. - -#> script/generate Migration AddIndexesToD - -# file: 005_add_indexes_to_d -class AddIndexesToD < ActiveRecord::Migration - def self.up - add_index :d, [ :p_id, :type ] - add_index :d, :type - end - - def self.remove - remove_index :d, [ :p_id, :type ] - remove_index :d, :type - end -end - - -Now that we have an index on the foreign_key column and type, lets re-run the query and -see if we got rid of that full table scan. - -# development.log - -P Load (0.009011) - => SELECT p.* FROM p INNER JOIN d ON p.id = d.p_id WHERE (d.p_id = 2 AND ((d.type = 'P'))) - -Analyzing P Load - -select_type | key_len | type | Extra | id | possible_keys | rows | table | ref | key ------------------------------------------------------------------------------------------------------------------------------- -SIMPLE | 255 | ref | Using where | 1 | d_p_id_type_index,d_type_index | 1 | d | const | d_p_id_type_index -SIMPLE | 4 | eq_ref | Using where | 1 | PRIMARY | 1 | p | d.p_id | PRIMARY - -Okay. Now MySQL is using an index satisfy the WHERE condition. Using the index, it was able to -find the single row that matched, preventing the full table scan. - - -Credits: -The extension of the Array class for printing the columnized records was originally -written by Peter Cooper who adapted it from Courtenay from #caboose. - -http://www.rubyinside.com/columnized-text-datasets-in-rails-71.html -http://habtm.com/articles/2006/06/10/pretty-tables-for-ruby-objects - -Released under the MIT license (download your own if you need it) diff --git a/vendor/plugins/query-analyzer/init.rb b/vendor/plugins/query-analyzer/init.rb deleted file mode 100644 index cf28821..0000000 --- a/vendor/plugins/query-analyzer/init.rb +++ /dev/null @@ -1 +0,0 @@ -require 'query_analyzer' \ No newline at end of file diff --git a/vendor/plugins/query-analyzer/lib/query_analyzer.rb b/vendor/plugins/query-analyzer/lib/query_analyzer.rb deleted file mode 100644 index 17a3807..0000000 --- a/vendor/plugins/query-analyzer/lib/query_analyzer.rb +++ /dev/null @@ -1,54 +0,0 @@ -class Array - protected - def qa_columnized_row(fields, sized) - row = [] - fields.each_with_index do |f, i| - row << sprintf("%0-#{sized[i]}s", f.to_s) - end - row.join(' | ') - end - - public - - def qa_columnized - sized = {} - self.each do |row| - row.values.each_with_index do |value, i| - sized[i] = [sized[i].to_i, row.keys[i].length, value.to_s.length].max - end - end - - table = [] - table << qa_columnized_row(self.first.keys, sized) - table << '-' * table.first.length - self.each { |row| table << qa_columnized_row(row.values, sized) } - table.join("\n ") # Spaces added to work with format_log_entry - end -end - - - -module ActiveRecord - module ConnectionAdapters - class MysqlAdapter < AbstractAdapter - private - alias_method :select_without_analyzer, :select - - def select(sql, name = nil) - query_results = select_without_analyzer(sql, name) - - if @logger and @logger.level == Logger::DEBUG - @logger.debug( - ActiveRecord::Base.silence do - explain_results = select_without_analyzer("explain #{sql}", name) - format_log_entry("\033[1;34m############ FIXME - UNOPTIMIZED QUERY for #{name} ############ \033[0m\n", - "#{explain_results.qa_columnized}\n" - ) if explain_results[0]["rows"].to_i > 100 && sql =~ / where[\s(]/i - end - ) if sql =~ /^select/i - end - query_results - end - end - end -end -- libgit2 0.21.2