diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb | 84 |
1 files changed, 37 insertions, 47 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index 168180cfd3..595c635fc0 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -8,6 +8,13 @@ module ActiveRecord o.sql_type = type_to_sql(o.type, o.limit, o.precision, o.scale, o.array) super end + + def add_column_options!(sql, options) + if options[:collation] + sql << " COLLATE \"#{options[:collation]}\"" + end + super + end end module SchemaStatements @@ -63,11 +70,7 @@ module ActiveRecord # Returns the list of all tables in the schema search path or a specified schema. def tables(name = nil) - query(<<-SQL, 'SCHEMA').map { |row| row[0] } - SELECT tablename - FROM pg_tables - WHERE schemaname = ANY (current_schemas(false)) - SQL + select_values("SELECT tablename FROM pg_tables WHERE schemaname = ANY(current_schemas(false))", 'SCHEMA') end # Returns true if table exists. @@ -77,7 +80,7 @@ module ActiveRecord name = Utils.extract_schema_qualified_name(name.to_s) return false unless name.identifier - exec_query(<<-SQL, 'SCHEMA').rows.first[0].to_i > 0 + select_value(<<-SQL, 'SCHEMA').to_i > 0 SELECT COUNT(*) FROM pg_class c LEFT JOIN pg_namespace n ON n.oid = c.relnamespace @@ -93,15 +96,12 @@ module ActiveRecord # Returns true if schema exists. def schema_exists?(name) - exec_query(<<-SQL, 'SCHEMA').rows.first[0].to_i > 0 - SELECT COUNT(*) - FROM pg_namespace - WHERE nspname = '#{name}' - SQL + select_value("SELECT COUNT(*) FROM pg_namespace WHERE nspname = '#{name}'", 'SCHEMA').to_i > 0 end + # Verifies existence of an index with a given name. def index_name_exists?(table_name, index_name, default) - exec_query(<<-SQL, 'SCHEMA').rows.first[0].to_i > 0 + select_value(<<-SQL, 'SCHEMA').to_i > 0 SELECT COUNT(*) FROM pg_class t INNER JOIN pg_index d ON t.oid = d.indrelid @@ -158,55 +158,48 @@ module ActiveRecord # Returns the list of all column definitions for a table. def columns(table_name) # Limit, precision, and scale are all handled by the superclass. - column_definitions(table_name).map do |column_name, type, default, notnull, oid, fmod| + column_definitions(table_name).map do |column_name, type, default, notnull, oid, fmod, collation| oid = oid.to_i fmod = fmod.to_i type_metadata = fetch_type_metadata(column_name, type, oid, fmod) default_value = extract_value_from_default(default) default_function = extract_default_function(default_value, default) - new_column(column_name, default_value, type_metadata, !notnull, default_function) + new_column(column_name, default_value, type_metadata, !notnull, default_function, collation) end end - def new_column(name, default, sql_type_metadata = nil, null = true, default_function = nil) # :nodoc: - PostgreSQLColumn.new(name, default, sql_type_metadata, null, default_function) + def new_column(name, default, sql_type_metadata = nil, null = true, default_function = nil, collation = nil) # :nodoc: + PostgreSQLColumn.new(name, default, sql_type_metadata, null, default_function, collation) end # Returns the current database name. def current_database - query('select current_database()', 'SCHEMA')[0][0] + select_value('select current_database()', 'SCHEMA') end # Returns the current schema name. def current_schema - query('SELECT current_schema', 'SCHEMA')[0][0] + select_value('SELECT current_schema', 'SCHEMA') end # Returns the current database encoding format. def encoding - query(<<-end_sql, 'SCHEMA')[0][0] - SELECT pg_encoding_to_char(pg_database.encoding) FROM pg_database - WHERE pg_database.datname LIKE '#{current_database}' - end_sql + select_value("SELECT pg_encoding_to_char(encoding) FROM pg_database WHERE datname LIKE '#{current_database}'", 'SCHEMA') end # Returns the current database collation. def collation - query(<<-end_sql, 'SCHEMA')[0][0] - SELECT pg_database.datcollate FROM pg_database WHERE pg_database.datname LIKE '#{current_database}' - end_sql + select_value("SELECT datcollate FROM pg_database WHERE datname LIKE '#{current_database}'", 'SCHEMA') end # Returns the current database ctype. def ctype - query(<<-end_sql, 'SCHEMA')[0][0] - SELECT pg_database.datctype FROM pg_database WHERE pg_database.datname LIKE '#{current_database}' - end_sql + select_value("SELECT datctype FROM pg_database WHERE datname LIKE '#{current_database}'", 'SCHEMA') end # Returns an array of schema names. def schema_names - query(<<-SQL, 'SCHEMA').flatten + select_values(<<-SQL, 'SCHEMA') SELECT nspname FROM pg_namespace WHERE nspname !~ '^pg_.*' @@ -239,12 +232,12 @@ module ActiveRecord # Returns the active schema search path. def schema_search_path - @schema_search_path ||= query('SHOW search_path', 'SCHEMA')[0][0] + @schema_search_path ||= select_value('SHOW search_path', 'SCHEMA') end # Returns the current client message level. def client_min_messages - query('SHOW client_min_messages', 'SCHEMA')[0][0] + select_value('SHOW client_min_messages', 'SCHEMA') end # Set the client message level. @@ -262,10 +255,7 @@ module ActiveRecord end def serial_sequence(table, column) - result = exec_query(<<-eosql, 'SCHEMA') - SELECT pg_get_serial_sequence('#{table}', '#{column}') - eosql - result.rows.first.first + select_value("SELECT pg_get_serial_sequence('#{table}', '#{column}')", 'SCHEMA') end # Sets the sequence of a table's primary key to the specified value. @@ -276,9 +266,7 @@ module ActiveRecord if sequence quoted_sequence = quote_table_name(sequence) - select_value <<-end_sql, 'SCHEMA' - SELECT setval('#{quoted_sequence}', #{value}) - end_sql + select_value("SELECT setval('#{quoted_sequence}', #{value})", 'SCHEMA') else @logger.warn "#{table} has primary key #{pk} with no default sequence" if @logger end @@ -301,7 +289,7 @@ module ActiveRecord if pk && sequence quoted_sequence = quote_table_name(sequence) - select_value <<-end_sql, 'SCHEMA' + select_value(<<-end_sql, 'SCHEMA') SELECT setval('#{quoted_sequence}', (SELECT COALESCE(MAX(#{quote_column_name pk})+(SELECT increment_by FROM #{quoted_sequence}), (SELECT min_value FROM #{quoted_sequence})) FROM #{quote_table_name(table)}), false) end_sql end @@ -363,7 +351,7 @@ module ActiveRecord # Returns just a table's primary key def primary_key(table) - pks = exec_query(<<-end_sql, 'SCHEMA').rows + pks = query(<<-end_sql, 'SCHEMA') SELECT attr.attname FROM pg_attribute attr INNER JOIN pg_constraint cons ON attr.attrelid = cons.conrelid AND attr.attnum = any(cons.conkey) @@ -395,20 +383,20 @@ module ActiveRecord rename_table_indexes(table_name, new_name) end - # Adds a new column to the named table. - # See TableDefinition#column for details of the options you can use. - def add_column(table_name, column_name, type, options = {}) + def add_column(table_name, column_name, type, options = {}) #:nodoc: clear_cache! super end - # Changes the column of a table. - def change_column(table_name, column_name, type, options = {}) + def change_column(table_name, column_name, type, options = {}) #:nodoc: clear_cache! quoted_table_name = quote_table_name(table_name) quoted_column_name = quote_column_name(column_name) sql_type = type_to_sql(type, options[:limit], options[:precision], options[:scale], options[:array]) sql = "ALTER TABLE #{quoted_table_name} ALTER COLUMN #{quoted_column_name} TYPE #{sql_type}" + if options[:collation] + sql << " COLLATE \"#{options[:collation]}\"" + end if options[:using] sql << " USING #{options[:using]}" elsif options[:cast_as] @@ -437,7 +425,7 @@ module ActiveRecord end end - def change_column_null(table_name, column_name, null, default = nil) + def change_column_null(table_name, column_name, null, default = nil) #:nodoc: clear_cache! unless null || default.nil? column = column_for(table_name, column_name) @@ -447,7 +435,7 @@ module ActiveRecord end # Renames a column in a table. - def rename_column(table_name, column_name, new_column_name) + def rename_column(table_name, column_name, new_column_name) #:nodoc: clear_cache! execute "ALTER TABLE #{quote_table_name(table_name)} RENAME COLUMN #{quote_column_name(column_name)} TO #{quote_column_name(new_column_name)}" rename_column_indexes(table_name, column_name, new_column_name) @@ -462,6 +450,8 @@ module ActiveRecord execute "DROP INDEX #{quote_table_name(index_name)}" end + # Renames an index of a table. Raises error if length of new + # index name is greater than allowed limit. def rename_index(table_name, old_name, new_name) validate_index_length!(table_name, new_name) |