Module: Switchman::ActiveRecord::PostgreSQLAdapter
- Defined in:
- lib/switchman/active_record/postgresql_adapter.rb
Instance Method Summary collapse
- #add_index_options(_table_name, _column_name, _options = {}) ⇒ Object
- #columns ⇒ Object
-
#create_database(name, options = {}) ⇒ Object
copy/paste; use quote_local_table_name.
- #current_schemas ⇒ Object
-
#drop_database(name) ⇒ Object
copy/paste; use quote_local_table_name.
- #extract_schema_qualified_name(string) ⇒ Object
- #foreign_keys(table_name) ⇒ Object
- #index_name_exists?(table_name, index_name, _default = nil) ⇒ Boolean
- #indexes(table_name) ⇒ Object
- #quote_local_table_name(name) ⇒ Object
- #quote_table_name(name) ⇒ Object
- #rename_index(table_name, old_name, new_name) ⇒ Object
- #rename_table(table_name, new_name) ⇒ Object
- #tables(name = nil) ⇒ Object
- #use_qualified_names? ⇒ Boolean
- #view_exists?(name) ⇒ Boolean
- #with_local_table_name(enable = true) ⇒ Object
Instance Method Details
#add_index_options(_table_name, _column_name, _options = {}) ⇒ Object
206 207 208 209 210 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 206 def (_table_name, _column_name, = {}) index_name, index_type, index_columns, , algorithm, using = super algorithm = nil if DatabaseServer.creating_new_shard && algorithm == "CONCURRENTLY" [index_name, index_type, index_columns, , algorithm, using] end |
#columns ⇒ Object
234 235 236 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 234 def columns(*) with_local_table_name(false) { super } end |
#create_database(name, options = {}) ⇒ Object
copy/paste; use quote_local_table_name
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 5 def create_database(name, = {}) = { encoding: 'utf8' }.merge!(.symbolize_keys) option_string = .sum do |key, value| case key when :owner " OWNER = \"#{value}\"" when :template " TEMPLATE = \"#{value}\"" when :encoding " ENCODING = '#{value}'" when :collation " LC_COLLATE = '#{value}'" when :ctype " LC_CTYPE = '#{value}'" when :tablespace " TABLESPACE = \"#{value}\"" when :connection_limit " CONNECTION LIMIT = #{value}" else "" end end execute "CREATE DATABASE #{quote_local_table_name(name)}#{option_string}" end |
#current_schemas ⇒ Object
37 38 39 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 37 def current_schemas select_values("SELECT * FROM unnest(current_schemas(false))") end |
#drop_database(name) ⇒ Object
copy/paste; use quote_local_table_name
33 34 35 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 33 def drop_database(name) #:nodoc: execute "DROP DATABASE IF EXISTS #{quote_local_table_name(name)}" end |
#extract_schema_qualified_name(string) ⇒ Object
55 56 57 58 59 60 61 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 55 def extract_schema_qualified_name(string) name = ::ActiveRecord::ConnectionAdapters::PostgreSQL::Utils.extract_schema_qualified_name(string.to_s) if string && !name.schema && use_qualified_names? name.instance_variable_set(:@schema, shard.name) end [name.schema, name.identifier] end |
#foreign_keys(table_name) ⇒ Object
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 167 def foreign_keys(table_name) schema = shard.name if use_qualified_names? # mostly copy-pasted from AR - only change is to the nspname condition for qualified names support fk_info = select_all <<-SQL.strip_heredoc SELECT t2.oid::regclass::text AS to_table, a1.attname AS column, a2.attname AS primary_key, c.conname AS name, c.confupdtype AS on_update, c.confdeltype AS on_delete FROM pg_constraint c JOIN pg_class t1 ON c.conrelid = t1.oid JOIN pg_class t2 ON c.confrelid = t2.oid JOIN pg_attribute a1 ON a1.attnum = c.conkey[1] AND a1.attrelid = t1.oid JOIN pg_attribute a2 ON a2.attnum = c.confkey[1] AND a2.attrelid = t2.oid JOIN pg_namespace t3 ON c.connamespace = t3.oid WHERE c.contype = 'f' AND t1.relname = #{quote(table_name)} AND t3.nspname = #{schema ? "'#{schema}'" : 'ANY (current_schemas(false))'} ORDER BY c.conname SQL fk_info.map do |row| = { column: row['column'], name: row['name'], primary_key: row['primary_key'] } [:on_delete] = extract_foreign_key_action(row['on_delete']) [:on_update] = extract_foreign_key_action(row['on_update']) # strip the schema name from to_table if it matches to_table = row['to_table'] to_table_qualified_name = ::ActiveRecord::ConnectionAdapters::PostgreSQL::Utils.extract_schema_qualified_name(to_table) if use_qualified_names? && to_table_qualified_name.schema == shard.name to_table = to_table_qualified_name.identifier end ::ActiveRecord::ConnectionAdapters::ForeignKeyDefinition.new(table_name, to_table, ) end end |
#index_name_exists?(table_name, index_name, _default = nil) ⇒ Boolean
128 129 130 131 132 133 134 135 136 137 138 139 140 141 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 128 def index_name_exists?(table_name, index_name, _default = nil) schema = shard.name if use_qualified_names? exec_query(<<-SQL, 'SCHEMA').rows.first[0].to_i > 0 SELECT COUNT(*) FROM pg_class t INNER JOIN pg_index d ON t.oid = d.indrelid INNER JOIN pg_class i ON d.indexrelid = i.oid WHERE i.relkind = 'i' AND i.relname = '#{index_name}' AND t.relname = '#{table_name}' AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = #{schema ? "'#{schema}'" : 'ANY (current_schemas(false))'} ) SQL end |
#indexes(table_name) ⇒ Object
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 80 def indexes(table_name) schema = shard.name if use_qualified_names? result = query(<<-SQL, 'SCHEMA') SELECT distinct i.relname, d.indisunique, d.indkey, pg_get_indexdef(d.indexrelid), t.oid FROM pg_class t INNER JOIN pg_index d ON t.oid = d.indrelid INNER JOIN pg_class i ON d.indexrelid = i.oid WHERE i.relkind = 'i' AND d.indisprimary = 'f' AND t.relname = '#{table_name}' AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = #{schema ? "'#{schema}'" : 'ANY (current_schemas(false))'} ) ORDER BY i.relname SQL result.map do |row| index_name = row[0] unique = row[1] == true || row[1] == 't' indkey = row[2].split(" ") inddef = row[3] oid = row[4] columns = Hash[query(<<-SQL, "SCHEMA")] SELECT a.attnum, a.attname FROM pg_attribute a WHERE a.attrelid = #{oid} AND a.attnum IN (#{indkey.join(",")}) SQL column_names = columns.stringify_keys.values_at(*indkey).compact unless column_names.empty? # add info on sort order for columns (only desc order is explicitly specified, asc is the default) desc_order_columns = inddef.scan(/(\w+) DESC/).flatten orders = desc_order_columns.any? ? Hash[desc_order_columns.map {|order_column| [order_column, :desc]}] : {} where = inddef.scan(/WHERE (.+)$/).flatten[0] using = inddef.scan(/USING (.+?) /).flatten[0].to_sym if ::Rails.version >= "5.2" ::ActiveRecord::ConnectionAdapters::IndexDefinition.new(table_name, index_name, unique, column_names, orders: orders, where: where, using: using) else ::ActiveRecord::ConnectionAdapters::IndexDefinition.new(table_name, index_name, unique, column_names, [], orders, where, nil, using) end end end.compact end |
#quote_local_table_name(name) ⇒ Object
143 144 145 146 147 148 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 143 def quote_local_table_name(name) # postgres quotes tables and columns the same; just pass through # (differs from quote_table_name_with_shard below by no logic to # explicitly qualify the table) quote_column_name(name) end |
#quote_table_name(name) ⇒ Object
150 151 152 153 154 155 156 157 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 150 def quote_table_name(name) return quote_local_table_name(name) if @use_local_table_name name = ::ActiveRecord::ConnectionAdapters::PostgreSQL::Utils.extract_schema_qualified_name(name.to_s) if !name.schema && use_qualified_names? name.instance_variable_set(:@schema, shard.name) end name.quoted end |
#rename_index(table_name, old_name, new_name) ⇒ Object
228 229 230 231 232 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 228 def rename_index(table_name, old_name, new_name) validate_index_length!(table_name, new_name) execute "ALTER INDEX #{quote_table_name(old_name)} RENAME TO #{quote_local_table_name(new_name)}" end |
#rename_table(table_name, new_name) ⇒ Object
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 212 def rename_table(table_name, new_name) clear_cache! execute "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_local_table_name(new_name)}" pk, seq = pk_and_sequence_for(new_name) if pk idx = "#{table_name}_pkey" new_idx = "#{new_name}_pkey" execute "ALTER INDEX #{quote_table_name(idx)} RENAME TO #{quote_local_table_name(new_idx)}" if seq && seq.identifier == "#{table_name}_#{pk}_seq" new_seq = "#{new_name}_#{pk}_seq" execute "ALTER TABLE #{seq.quoted} RENAME TO #{quote_local_table_name(new_seq)}" end end rename_table_indexes(table_name, new_name) end |
#tables(name = nil) ⇒ Object
45 46 47 48 49 50 51 52 53 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 45 def tables(name = nil) schema = shard.name if use_qualified_names? query(<<-SQL, 'SCHEMA').map { |row| row[0] } SELECT tablename FROM pg_tables WHERE schemaname = #{schema ? "'#{schema}'" : 'ANY (current_schemas(false))'} SQL end |
#use_qualified_names? ⇒ Boolean
41 42 43 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 41 def use_qualified_names? @config[:use_qualified_names] end |
#view_exists?(name) ⇒ Boolean
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 63 def view_exists?(name) name = ::ActiveRecord::ConnectionAdapters::PostgreSQL::Utils.extract_schema_qualified_name(name.to_s) return false unless name.identifier if !name.schema && use_qualified_names? name.instance_variable_set(:@schema, shard.name) end select_values(<<-SQL, 'SCHEMA').any? SELECT c.relname FROM pg_class c LEFT JOIN pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind IN ('v','m') -- (v)iew, (m)aterialized view AND c.relname = '#{name.identifier}' AND n.nspname = #{name.schema ? "'#{name.schema}'" : 'ANY (current_schemas(false))'} SQL end |
#with_local_table_name(enable = true) ⇒ Object
159 160 161 162 163 164 165 |
# File 'lib/switchman/active_record/postgresql_adapter.rb', line 159 def with_local_table_name(enable = true) old_value = @use_local_table_name @use_local_table_name = enable yield ensure @use_local_table_name = old_value end |