Class: Myreplicator::VerticaLoader
- Inherits:
-
Object
- Object
- Myreplicator::VerticaLoader
- Defined in:
- lib/loader/vertica/vertica_loader.rb
Class Method Summary collapse
-
.apply_schema_change(options, temp_table) ⇒ Object
Schema Change Algorithm Create temp table to load all data Load data Drop table Rename table.
- .clean_up_temp_tables(db) ⇒ Object
- .create_table(*args) ⇒ Object
- .create_temp_table(*args) ⇒ Object
- .destination_table_vertica(options) ⇒ Object
- .get_analyze_constraints(*args) ⇒ Object
- .get_mysql_inserted_columns(mysql_schema_simple_form) ⇒ Object
- .get_mysql_keys(mysql_schema_simple_form) ⇒ Object
- .get_mysql_none_keys(mysql_schema_simple_form) ⇒ Object
- .get_vsql_copy_command(prepared_options) ⇒ Object
- .get_vsql_merge_command(options, keys, none_keys, inserted_columns) ⇒ Object
-
.load(*args) ⇒ Object
Loader::VerticaLoader.load(=> “king”, :table => “category_overview_data”, :file => “tmp/vertica/category_overview_data.tsv”, :null_value => “NULL”) check for export_type!.
- .prepare_options(*args) ⇒ Object
- .process_file(*args) ⇒ Object
- .process_flat_file(file, list_of_nulls, null_value) ⇒ Object
- .process_gzip_file(file, list_of_nulls, null_value) ⇒ Object
- .replace_null(file, list_of_nulls, null_value = "NULL") ⇒ Object
- .vertica_copy(*args) ⇒ Object
- .vertica_merge(*args) ⇒ Object
Class Method Details
.apply_schema_change(options, temp_table) ⇒ Object
Schema Change Algorithm Create temp table to load all data Load data Drop table Rename table
rasing a concern: using the same schema or the tmp schema for the tmp table? Vertica doesn’t lock the schema
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# File 'lib/loader/vertica/vertica_loader.rb', line 37 def apply_schema_change , temp_table Kernel.p "+++++++++++++++++ options " puts VerticaLoader.create_table({:mysql_schema => [:mysql_schema], :vertica_db => [:vertica_db], :vertica_schema => [:vertica_schema], :table => temp_table, :mysql_table => [:table]}) table = [:table] export_id = [:export_id] = [:file] = [:filepath] [:table] = temp_table [:schema] = [:vertica_schema] vertica_copy Kernel.p "+++++++++++++++++ new_options " puts [:table] = table puts # drop the old table sql = "DROP TABLE IF EXISTS #{[:vertica_db]}.#{[:vertica_schema]}.#{[:table]} CASCADE;" #VerticaDb::Base.connection.execute sql Myreplicator::DB.exec_sql("vertica",sql) # rename sql = "ALTER TABLE #{[:vertica_db]}.#{[:vertica_schema]}.#{temp_table} RENAME TO \"#{[:table]}\";" #VerticaDb::Base.connection.execute sql Myreplicator::DB.exec_sql("vertica",sql) end |
.clean_up_temp_tables(db) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 399 def clean_up_temp_tables db sql = "SELECT table_name FROm v_catalog.tables WHERE table_schema ='#{db}' and table_name LIKE 'temp_%';" result = Myreplicator::DB.exec_sql("vertica",sql) result.rows.each do |row| tb = row[:table_name] if tb.size > 15 time_str = tb[(tb.size-15)..(tb.size-1)] begin time = Time.local(time_str[0..3], time_str[4..5], time_str[6..7], time_str[9..10], time_str[11..12], time_str[13..14]) rescue Exception => e puts e. next end if time < Time.now() - 1.day sql = "DROP TABLE IF EXISTS #{db}.#{tb} CASCADE;" Myreplicator::DB.exec_sql("vertica",sql) end end end end |
.create_table(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 5 def create_table *args = args. Kernel.p "===== OPTION =====" puts columns = [] [:mysql_schema].each(:as => :hash) do |row| columns << row end [:columns] = columns sql = Myreplicator::VerticaSql.create_table_stmt puts sql #VerticaDb::Base.connection.execute sql Myreplicator::DB.exec_sql("vertica",sql) end |
.create_temp_table(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 70 def create_temp_table *args = args. temp_table_name = "temp_" + [:table] + DateTime.now.strftime('%Y%m%d_%H%M%S').to_s VerticaLoader.create_table({:mysql_schema => [:mysql_schema], :vertica_db => [:vertica_db], :vertica_schema => [:vertica_schema], :table => temp_table_name, :mysql_table => [:table]}) return temp_table_name end |
.destination_table_vertica(options) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 21 def destination_table_vertica sql = "select column_name, data_type From columns where table_name = '#{[:table]}' AND table_schema = '#{[:destination_schema]}'" puts sql result = DB.exec_sql("vertica",sql) return result end |
.get_analyze_constraints(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 421 def get_analyze_constraints *args = args. exp = Export.find([:export_id]) Kernel.p "!!!!! get_analyze_constraints !!!!!" begin if exp.analyze_constraints == true sql = "SELECT analyze_constraints('#{[:vertica_db]}.#{[:vertica_schema]}.#{[:table]}');" result = Myreplicator::DB.exec_sql("vertica",sql) if result.entries.size > 0 return 1 end sql = "SELECT COUNT(*) FROM #{[:vertica_schema]}.#{[:table]} WHERE modified_date < '#{(DateTime.now() -1.hour).strftime('%Y-%m-%d %H:%M:%S')}';" source_count = Myreplicator::DB.exec_sql("#{[:source_schema]}",sql) target_count = Myreplicator::DB.exec_sql("vertica",sql) if source_count != target_count return 1 end end rescue Exception => e puts e. end return 0 end |
.get_mysql_inserted_columns(mysql_schema_simple_form) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 294 def get_mysql_inserted_columns mysql_schema_simple_form result = [] mysql_schema_simple_form.each do |col| result << col["column_name"] end return result end |
.get_mysql_keys(mysql_schema_simple_form) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 274 def get_mysql_keys mysql_schema_simple_form result = [] mysql_schema_simple_form.each do |col| if col["column_key"] == "PRI" result << col["column_name"] end end return result end |
.get_mysql_none_keys(mysql_schema_simple_form) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 284 def get_mysql_none_keys mysql_schema_simple_form result = [] mysql_schema_simple_form.each do |col| if col["column_key"] != "PRI" result << col["column_name"] end end return result end |
.get_vsql_copy_command(prepared_options) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 203 def get_vsql_copy_command Kernel.p "===== get_vsql_copy_command prepared_options =====" Kernel.p file_extension = [:file].split('.').last file_handler = "" file_handler = "GZIP" if file_extension == "gz" tmp_dir = Myreplicator.tmp_path sql = "COPY #{[:schema]}.#{[:table]} FROM LOCAL \'#{[:file]}\' #{file_handler} DELIMITER E\'#{[:delimiter]}\' NULL as \'#{[:null_value]}\' ENCLOSED BY E\'#{[:enclosed]}\' RECORD TERMINATOR \'#{[:line_terminate]}\' EXCEPTIONS '#{tmp_dir}/load_logs/#{[:schema]}_#{[:table_name]}.log';" cmd = "#{[:vsql]} -h #{[:host]} -U #{[:user]} -w #{[:pass]} -d #{[:db]} -c \"#{sql}\"" return cmd end |
.get_vsql_merge_command(options, keys, none_keys, inserted_columns) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 302 def get_vsql_merge_command , keys, none_keys, inserted_columns Kernel.p "===== Merge Options =====" Kernel.p a = Kernel.p a = sql = "MERGE INTO " sql+= "#{[:db]}.#{[:schema]}.#{[:table]} target " sql+= "USING #{[:db]}.#{[:schema]}.#{[:temp_table]} source " sql+= "ON " count = 0 keys.each do |k| if count < 1 sql += "source.#{k} = target.#{k} " else sql += "AND source.#{k} = target.#{k} " end count += 1 end sql+= "WHEN MATCHED THEN " sql+= "UPDATE SET " count = 1 none_keys.each do |nk| if count < none_keys.size sql+= "#{nk} = source.#{nk}, " else sql+= "#{nk} = source.#{nk} " end count += 1 end sql+= "WHEN NOT MATCHED THEN " sql+= "INSERT " count = 1 sql+= " VALUES (" inserted_columns.each do |col| if count < inserted_columns.size sql+= "source.#{col}, " else sql+= "source.#{col}) " end count += 1 end sql+= "; COMMIT;" cmd = "#{[:vsql]} -h #{[:host]} -U #{[:user]} -w #{[:pass]} -d #{[:db]} -c \"#{sql}\"" return cmd end |
.load(*args) ⇒ Object
Loader::VerticaLoader.load(=> “king”, :table => “category_overview_data”, :file => “tmp/vertica/category_overview_data.tsv”, :null_value => “NULL”) check for export_type!
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# File 'lib/loader/vertica/vertica_loader.rb', line 114 def load *args = args. = [:metadata] Kernel.p "===== metadata =====" Kernel.p Kernel.p "===== metadata.export_type =====" Kernel.p .export_type Kernel.p #options = {:table => "actucast_appeal", :destination_schema => "public", :source_schema => "raw_sources"} schema_check = Myreplicator::MysqlExporter.schema_changed?(:table => [:table_name], :destination_schema => [:destination_schema], :source_schema => [:source_schema]) Kernel.p "===== schema_check =====" Kernel.p schema_check #create a temp table temp_table = "temp_" + [:table_name] + DateTime.now.strftime('%Y%m%d_%H%M%S').to_s ops = {:mysql_schema => schema_check[:mysql_schema], :vertica_db => [:db], :vertica_schema => [:destination_schema], :source_schema => [:source_schema], :table => [:table_name], :export_id => [:export_id], :filepath => [:filepath] } if schema_check[:new] create_table(ops) #LOAD DATA IN vertica_copy elsif schema_check[:changed] if .export_type == 'initial' Kernel.p "===== schema_check[:changed] =====" Loader.clear_older_files # clear old incremental files apply_schema_change(ops, temp_table) else Loader.cleanup #Remove incremental file Kernel.p "===== Remove incremental file =====" end elsif get_analyze_constraints(ops) > 0 # check for primary key/unique keys violations exp = Export.find(.export_id) Kernel.p "===== DROP CURRENT TABLE =====" sql = "DROP TABLE IF EXISTS #{[:db]}.#{[:destination_schema]}.#{[:table_name]} CASCADE;" Myreplicator::DB.exec_sql("vertica",sql) # run the export. The next time loader runs, it will load the file exp.export else temp_table = create_temp_table ops [:table] = temp_table Kernel.p "===== COPY TO TEMP TABLE #{temp_table} =====" vertica_copy exp = Export.find(.export_id) if exp.export_type == 'all' .reverse_merge!(:temp_table => "#{temp_table}") [:table] = [:table_name] Kernel.p "===== DROP CURRENT TABLE =====" sql = "DROP TABLE IF EXISTS #{[:db]}.#{[:destination_schema]}.#{[:table]} CASCADE;" Myreplicator::DB.exec_sql("vertica",sql) sql = "ALTER TABLE #{[:db]}.#{[:destination_schema]}.#{[:temp_table]} RENAME TO \"#{[:table]}\";" Kernel.p sql Myreplicator::DB.exec_sql("vertica",sql) elsif exp.export_type == 'incremental' .reverse_merge!(:temp_table => "#{temp_table}") [:table] = [:table_name] Kernel.p "===== MERGE =====" vertica_merge #drop the temp table Kernel.p "===== DROP TEMP TABLE =====" sql = "DROP TABLE IF EXISTS #{[:db]}.#{[:destination_schema]}.#{temp_table} CASCADE;" Myreplicator::DB.exec_sql("vertica",sql) end end end |
.prepare_options(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 82 def *args #options = args.extract_options!.clone = args. Kernel.p "===== OPTION [options[:db]] =====" puts # How not to hard code the vertica connection config ? = ActiveRecord::Base.configurations["vertica"] enclosed_by = Myreplicator.configs[[:source_schema]]['enclosed_by'] .reverse_merge!(:host => ["host"], :user => ["username"], :pass => ["password"], :db => ["database"], :schema => [:destination_schema], :table => [:table_name], :file => [:filepath], :delimiter => "\\0", :null_value => "NULL", :line_terminate => ";~~;\n", :enclosed => "#{Myreplicator.configs[[:source_schema]]['enclosed_by']}") #:enclosed => '\"') # working now but should fix this if !["vsql"].blank? .reverse_merge!(:vsql => ["vsql"]) else .reverse_merge!(:vsql => "/opt/vertica/bin/vsql") end return end |
.process_file(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 215 def process_file *args ### replace the null values in the input file = args. [:file].blank? ? return : file = [:file] [:list_of_nulls].blank? ? list_of_nulls = [] : list_of_nulls = [:list_of_nulls] [:null_value].blank? ? null_value = "NULL" : null_value = [:null_value] Kernel.p "===== file #{file}=====" file_extension = file.split('.').last Kernel.p "===== file_extension #{file_extension}=====" case file_extension when "tsv", "csv" process_flat_file(file, list_of_nulls, null_value) when "gz" process_gzip_file(file, list_of_nulls, null_value) else raise "Un supported file extension" end end |
.process_flat_file(file, list_of_nulls, null_value) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 251 def process_flat_file file, list_of_nulls, null_value # sed replace_null(file, list_of_nulls, null_value) end |
.process_gzip_file(file, list_of_nulls, null_value) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 256 def process_gzip_file file, list_of_nulls, null_value # unzip tmp_dir = Myreplicator.tmp_path temp_file = "#{tmp_dir}/temp_#{file.split('.').first.split('/').last}.txt" cmd = "gunzip -f #{file} -c > #{temp_file}" Kernel.p cmd system(cmd) # sed replace_null("#{temp_file}", list_of_nulls, null_value) # zip cmd2 = "gzip #{temp_file} -c > #{file}" Kernel.p cmd2 system(cmd2) cmd3 = "rm #{temp_file}" Kernel.p cmd3 system(cmd3) end |
.replace_null(file, list_of_nulls, null_value = "NULL") ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 235 def replace_null(file, list_of_nulls, null_value = "NULL") list_of_nulls.each do | value| # special case for NULL MySQL datetime/date type but the column is defined NOT NULL extension = file.split('.').last if value == '0000-00-00' cmd1 = "sed -i 's/#{value}/1900-01-01/g' #{file}" Kernel.p cmd1 system(cmd1) else cmd1 = "sed -i 's/#{value}/#{null_value}/g' #{file}" Kernel.p cmd1 system(cmd1) end end end |
.vertica_copy(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 186 def vertica_copy * args = args. list_of_nulls = ["0000-00-00"] = if [:file].blank? raise "No input file" end process_file(:file => [:file], :list_of_nulls => list_of_nulls, :null_value => [:null_value]) cmd = get_vsql_copy_command() puts cmd system(cmd) end |
.vertica_merge(*args) ⇒ Object
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# File 'lib/loader/vertica/vertica_loader.rb', line 349 def vertica_merge *args = args. = [:metadata] Kernel.p "===== MERGE metadata =====" Kernel.p ops = {:table => [:table_name], :destination_schema => [:destination_schema], :source_schema => [:source_schema]} mysql_schema = Loader.mysql_table_definition() vertica_schema = VerticaLoader.destination_table_vertica() mysql_schema_simple_form = MysqlExporter.get_mysql_schema_rows mysql_schema # get the column(s) that is(are) used as the primary key keys = get_mysql_keys mysql_schema_simple_form # get the non key coluns none_keys = get_mysql_none_keys mysql_schema_simple_form # get the column to put in the insert part inserted_columns = get_mysql_inserted_columns mysql_schema_simple_form #get the vsql merge command cmd = get_vsql_merge_command , keys, none_keys, inserted_columns #execute puts cmd begin result = `#{cmd} 2>&1` if result[0..4] == "ERROR" if result[0..9] == "ERROR 4115" # drop the current table. In the next run the table will be re-created and COPY is used to load data into it sql = "DROP TABLE IF EXISTS #{[:db]}.#{[:destination_schema]}.#{[:table]} CASCADE;" Kernel.p "===== DROP CMD =====" Kernel.p sql Myreplicator::DB.exec_sql("vertica",sql) sql = "ALTER TABLE #{[:db]}.#{[:destination_schema]}.#{[:temp_table]} RENAME TO \"#{[:table]}\";" Kernel.p sql Myreplicator::DB.exec_sql("vertica",sql) else Loader.cleanup sql = "DROP TABLE IF EXISTS #{[:db]}.#{[:destination_schema]}.#{[:temp_table]} CASCADE;" Kernel.p "===== DROP CMD =====" Kernel.p sql #VerticaDb::Base.connection.execute sql Myreplicator::DB.exec_sql("vertica",sql) raise result end end rescue Exception => e raise e. ensure # place holder end end |