Module: ActiveRecord::ConnectionAdapters::OracleEnhanced::SchemaStatements
- Defined in:
- lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb
Instance Method Summary collapse
-
#add_column(table_name, column_name, type, options = {}) ⇒ Object
:nodoc:.
-
#add_comment(table_name, column_name, comment) ⇒ Object
:nodoc:.
- #add_foreign_key(from_table, to_table, options = {}) ⇒ Object
-
#add_index(table_name, column_name, options = {}) ⇒ Object
:nodoc:.
-
#add_index_options(table_name, column_name, options = {}) ⇒ Object
:nodoc:.
-
#add_table_comment(table_name, comment) ⇒ Object
:nodoc:.
- #aliased_types(name, fallback) ⇒ Object
-
#change_column(table_name, column_name, type, options = {}) ⇒ Object
:nodoc:.
-
#change_column_default(table_name, column_name, default) ⇒ Object
:nodoc:.
-
#change_column_null(table_name, column_name, null, default = nil) ⇒ Object
:nodoc:.
-
#column_comment(table_name, column_name) ⇒ Object
:nodoc:.
-
#create_table(table_name, options = {}) {|td| ... } ⇒ Object
Additional options for
create_table
method in migration files. - #create_table_definition(name, temporary, options) ⇒ Object
-
#disable_referential_integrity(&block) ⇒ Object
REFERENTIAL INTEGRITY ====================================.
-
#drop_table(table_name, options = {}) ⇒ Object
:nodoc:.
-
#dump_schema_information ⇒ Object
:nodoc:.
-
#extract_foreign_key_action(specifier) ⇒ Object
:nodoc:.
-
#foreign_keys(table_name) ⇒ Object
get table foreign keys for schema dump.
-
#index_name(table_name, options) ⇒ Object
returned shortened index name if default is too large.
-
#index_name_exists?(table_name, index_name, default) ⇒ Boolean
Verify the existence of an index with a given name.
- #initialize_schema_migrations_table ⇒ Object
-
#remove_column(table_name, column_name, type = nil, options = {}) ⇒ Object
:nodoc:.
- #remove_foreign_key(from_table, options_or_to_table = {}) ⇒ Object
-
#remove_index(table_name, options = {}) ⇒ Object
Remove the given index from the table.
-
#remove_index!(table_name, index_name) ⇒ Object
clear cached indexes when removing index.
-
#rename_column(table_name, column_name, new_column_name) ⇒ Object
:nodoc:.
-
#rename_index(table_name, old_name, new_name) ⇒ Object
:nodoc:.
-
#rename_table(table_name, new_name) ⇒ Object
:nodoc:.
-
#table_comment(table_name) ⇒ Object
:nodoc:.
- #tablespace(table_name) ⇒ Object
-
#type_to_sql(type, limit = nil, precision = nil, scale = nil) ⇒ Object
Maps logical Rails types to Oracle-specific data types.
-
#update_table_definition(table_name, base) ⇒ Object
:nodoc:.
Instance Method Details
#add_column(table_name, column_name, type, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 281 def add_column(table_name, column_name, type, = {}) #:nodoc: if type.to_sym == :virtual type = [:type] end type = aliased_types(type.to_s, type) add_column_sql = "ALTER TABLE #{quote_table_name(table_name)} ADD #{quote_column_name(column_name)} " add_column_sql << type_to_sql(type, [:limit], [:precision], [:scale]) if type (add_column_sql, .merge(:type=>type, :column_name=>column_name, :table_name=>table_name)) add_column_sql << tablespace_for((type_to_sql(type).downcase.to_sym), nil, table_name, column_name) if type execute(add_column_sql) create_sequence_and_trigger(table_name, ) if type && type.to_sym == :primary_key ensure clear_table_columns_cache(table_name) end |
#add_comment(table_name, column_name, comment) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 358 def add_comment(table_name, column_name, comment) #:nodoc: return if comment.blank? execute "COMMENT ON COLUMN #{quote_table_name(table_name)}.#{column_name} IS '#{comment}'" end |
#add_foreign_key(from_table, to_table, options = {}) ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 403 def add_foreign_key(from_table, to_table, = {}) if [:dependent] ActiveSupport::Deprecation.warn "`:dependent` option will be deprecated. Please use `:on_delete` option" end case [:dependent] when :delete then [:on_delete] = :cascade when :nullify then [:on_delete] = :nullify else end super end |
#add_index(table_name, column_name, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 165 def add_index(table_name, column_name, = {}) #:nodoc: index_name, index_type, quoted_column_names, tablespace, = (table_name, column_name, ) execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} (#{quoted_column_names})#{tablespace} #{}" if index_type == 'UNIQUE' unless quoted_column_names =~ /\(.*\)/ execute "ALTER TABLE #{quote_table_name(table_name)} ADD CONSTRAINT #{quote_column_name(index_name)} #{index_type} (#{quoted_column_names})" end end ensure self.all_schema_indexes = nil end |
#add_index_options(table_name, column_name, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 177 def (table_name, column_name, = {}) #:nodoc: column_names = Array(column_name) index_name = index_name(table_name, column: column_names) .assert_valid_keys(:unique, :order, :name, :where, :length, :internal, :tablespace, :options, :using) index_type = [:unique] ? "UNIQUE" : "" index_name = [:name].to_s if .key?(:name) tablespace = tablespace_for(:index, [:tablespace]) max_index_length = .fetch(:internal, false) ? index_name_length : allowed_index_name_length #TODO: This option is used for NOLOGGING, needs better argumetn name = [:options] if index_name.to_s.length > max_index_length raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' is too long; the limit is #{max_index_length} characters" end if index_name_exists?(table_name, index_name, false) raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' already exists" end quoted_column_names = column_names.map { |e| quote_column_name_or_expression(e) }.join(", ") [index_name, index_type, quoted_column_names, tablespace, ] end |
#add_table_comment(table_name, comment) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 363 def add_table_comment(table_name, comment) #:nodoc: return if comment.blank? execute "COMMENT ON TABLE #{quote_table_name(table_name)} IS '#{comment}'" end |
#aliased_types(name, fallback) ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 300 def aliased_types(name, fallback) fallback end |
#change_column(table_name, column_name, type, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 320 def change_column(table_name, column_name, type, = {}) #:nodoc: column = column_for(table_name, column_name) # remove :null option if its value is the same as current column definition # otherwise Oracle will raise error if .has_key?(:null) && [:null] == column.null [:null] = nil end if type.to_sym == :virtual type = [:type] end change_column_sql = "ALTER TABLE #{quote_table_name(table_name)} MODIFY #{quote_column_name(column_name)} " change_column_sql << "#{type_to_sql(type, [:limit], [:precision], [:scale])}" if type (change_column_sql, .merge(:type=>type, :column_name=>column_name, :table_name=>table_name)) change_column_sql << tablespace_for((type_to_sql(type).downcase.to_sym), nil, [:table_name], [:column_name]) if type execute(change_column_sql) ensure clear_table_columns_cache(table_name) end |
#change_column_default(table_name, column_name, default) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 304 def change_column_default(table_name, column_name, default) #:nodoc: execute "ALTER TABLE #{quote_table_name(table_name)} MODIFY #{quote_column_name(column_name)} DEFAULT #{quote(default)}" ensure clear_table_columns_cache(table_name) end |
#change_column_null(table_name, column_name, null, default = nil) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 310 def change_column_null(table_name, column_name, null, default = nil) #:nodoc: column = column_for(table_name, column_name) unless null || default.nil? execute("UPDATE #{quote_table_name(table_name)} SET #{quote_column_name(column_name)}=#{quote(default)} WHERE #{quote_column_name(column_name)} IS NULL") end change_column table_name, column_name, column.sql_type, :null => null end |
#column_comment(table_name, column_name) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 377 def column_comment(table_name, column_name) #:nodoc: (owner, table_name, db_link) = @connection.describe(table_name) select_value <<-SQL SELECT comments FROM all_col_comments#{db_link} WHERE owner = '#{owner}' AND table_name = '#{table_name}' AND column_name = '#{column_name.upcase}' SQL end |
#create_table(table_name, options = {}) {|td| ... } ⇒ Object
Additional options for create_table
method in migration files.
You can specify individual starting value in table creation migration file, e.g.:
create_table :users, :sequence_start_value => 100 do |t|
# ...
end
You can also specify other sequence definition additional parameters, e.g.:
create_table :users, :sequence_start_value => “100 NOCACHE INCREMENT BY 10” do |t|
# ...
end
Create primary key trigger (so that you can skip primary key value in INSERT statement). By default trigger name will be “table_name_pkt”, you can override the name with :trigger_name option (but it is not recommended to override it as then this trigger will not be detected by ActiveRecord model and it will still do prefetching of sequence value). Example:
create_table :users, :primary_key_trigger => true do |t|
# ...
end
It is possible to add table and column comments in table creation migration files:
create_table :employees, :comment => “Employees and contractors” do |t|
t.string :first_name, :comment => “Given name”
t.string :last_name, :comment => “Surname”
end
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 43 def create_table(table_name, = {}) create_sequence = [:id] != false column_comments = {} temporary = .delete(:temporary) = td = create_table_definition table_name, temporary, td.primary_key([:primary_key] || Base.get_primary_key(table_name.to_s.singularize)) unless [:id] == false # store that primary key was defined in create_table block unless create_sequence class << td attr_accessor :create_sequence def primary_key(*args) self.create_sequence = true super(*args) end end end # store column comments class << td attr_accessor :column_comments def column(name, type, = {}) if [:comment] self.column_comments ||= {} self.column_comments[name] = [:comment] end super(name, type, ) end end yield td if block_given? create_sequence = create_sequence || td.create_sequence column_comments = td.column_comments if td.column_comments tablespace = tablespace_for(:table, [:tablespace]) if [:force] && table_exists?(table_name) drop_table(table_name, ) end execute schema_creation.accept td create_sequence_and_trigger(table_name, ) if create_sequence add_table_comment table_name, [:comment] column_comments.each do |column_name, comment| add_comment table_name, column_name, comment end td.indexes.each_pair { |c,o| add_index table_name, c, o } td.foreign_keys.each_pair do |other_table_name, | add_foreign_key(table_name, other_table_name, ) end end |
#create_table_definition(name, temporary, options) ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 98 def create_table_definition(name, temporary, ) ActiveRecord::ConnectionAdapters::OracleEnhanced::TableDefinition.new native_database_types, name, temporary, end |
#disable_referential_integrity(&block) ⇒ Object
REFERENTIAL INTEGRITY ====================================
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 465 def disable_referential_integrity(&block) #:nodoc: sql_constraints = <<-SQL SELECT constraint_name, owner, table_name FROM user_constraints WHERE constraint_type = 'R' AND status = 'ENABLED' SQL old_constraints = select_all(sql_constraints) begin old_constraints.each do |constraint| execute "ALTER TABLE #{constraint["table_name"]} DISABLE CONSTRAINT #{constraint["constraint_name"]}" end yield ensure old_constraints.each do |constraint| execute "ALTER TABLE #{constraint["table_name"]} ENABLE CONSTRAINT #{constraint["constraint_name"]}" end end end |
#drop_table(table_name, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 115 def drop_table(table_name, = {}) #:nodoc: execute "DROP TABLE #{quote_table_name(table_name)}#{' CASCADE CONSTRAINTS' if [:force] == :cascade}" seq_name = [:sequence_name] || default_sequence_name(table_name) execute "DROP SEQUENCE #{quote_table_name(seq_name)}" rescue nil rescue ActiveRecord::StatementInvalid => e raise e unless [:if_exists] ensure clear_table_columns_cache(table_name) self.all_schema_indexes = nil end |
#dump_schema_information ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 126 def dump_schema_information #:nodoc: sm_table = ActiveRecord::Migrator.schema_migrations_table_name migrated = select_values("SELECT version FROM #{sm_table} ORDER BY version") join_with_statement_token(migrated.map{|v| "INSERT INTO #{sm_table} (version) VALUES ('#{v}')" }) end |
#extract_foreign_key_action(specifier) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 456 def extract_foreign_key_action(specifier) # :nodoc: case specifier when 'CASCADE'; :cascade when 'SET NULL'; :nullify end end |
#foreign_keys(table_name) ⇒ Object
get table foreign keys for schema dump
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 421 def foreign_keys(table_name) #:nodoc: (owner, desc_table_name, db_link) = @connection.describe(table_name) fk_info = select_all(<<-SQL, 'Foreign Keys') SELECT r.table_name to_table ,rc.column_name references_column ,cc.column_name ,c.constraint_name name ,c.delete_rule FROM user_constraints#{db_link} c, user_cons_columns#{db_link} cc, user_constraints#{db_link} r, user_cons_columns#{db_link} rc WHERE c.owner = '#{owner}' AND c.table_name = '#{desc_table_name}' AND c.constraint_type = 'R' AND cc.owner = c.owner AND cc.constraint_name = c.constraint_name AND r.constraint_name = c.r_constraint_name AND r.owner = c.owner AND rc.owner = r.owner AND rc.constraint_name = r.constraint_name AND rc.position = cc.position ORDER BY name, to_table, column_name, references_column SQL fk_info.map do |row| = { column: oracle_downcase(row['column_name']), name: oracle_downcase(row['name']), primary_key: oracle_downcase(row['references_column']) } [:on_delete] = extract_foreign_key_action(row['delete_rule']) OracleEnhanced::ForeignKeyDefinition.new(oracle_downcase(table_name), oracle_downcase(row['to_table']), ) end end |
#index_name(table_name, options) ⇒ Object
returned shortened index name if default is too large
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 229 def index_name(table_name, ) #:nodoc: default_name = super(table_name, ).to_s # sometimes options can be String or Array with column names = {} unless .is_a?(Hash) identifier_max_length = [:identifier_max_length] || index_name_length return default_name if default_name.length <= identifier_max_length # remove 'index', 'on' and 'and' keywords shortened_name = "i_#{table_name}_#{Array([:column]) * '_'}" # leave just first three letters from each word if shortened_name.length > identifier_max_length shortened_name = shortened_name.split('_').map{|w| w[0,3]}.join('_') end # generate unique name using hash function if shortened_name.length > identifier_max_length shortened_name = 'i'+Digest::SHA1.hexdigest(default_name)[0,identifier_max_length-1] end @logger.warn "#{adapter_name} shortened default index name #{default_name} to #{shortened_name}" if @logger shortened_name end |
#index_name_exists?(table_name, index_name, default) ⇒ Boolean
Verify the existence of an index with a given name.
The default argument is returned if the underlying implementation does not define the indexes method, as there’s no way to determine the correct answer in that case.
Will always query database and not index cache.
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 257 def index_name_exists?(table_name, index_name, default) (owner, table_name, db_link) = @connection.describe(table_name) result = select_value(<<-SQL) SELECT 1 FROM all_indexes#{db_link} i WHERE i.owner = '#{owner}' AND i.table_owner = '#{owner}' AND i.table_name = '#{table_name}' AND i.index_name = '#{index_name.to_s.upcase}' SQL result == 1 end |
#initialize_schema_migrations_table ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 132 def initialize_schema_migrations_table sm_table = ActiveRecord::Migrator.schema_migrations_table_name unless table_exists?(sm_table) index_name = "#{Base.table_name_prefix}unique_schema_migrations#{Base.table_name_suffix}" if index_name.length > index_name_length truncate_to = index_name_length - index_name.to_s.length - 1 truncated_name = "unique_schema_migrations"[0..truncate_to] index_name = "#{Base.table_name_prefix}#{truncated_name}#{Base.table_name_suffix}" end create_table(sm_table, :id => false) do |schema_migrations_table| schema_migrations_table.column :version, :string, :null => false end add_index sm_table, :version, :unique => true, :name => index_name # Backwards-compatibility: if we find schema_info, assume we've # migrated up to that point: si_table = Base.table_name_prefix + 'schema_info' + Base.table_name_suffix if table_exists?(si_table) ActiveSupport::Deprecation.warn "Usage of the schema table `#{si_table}` is deprecated. Please switch to using `schema_migrations` table" old_version = select_value("SELECT version FROM #{quote_table_name(si_table)}").to_i assume_migrated_upto_version(old_version) drop_table(si_table) end end end |
#remove_column(table_name, column_name, type = nil, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 351 def remove_column(table_name, column_name, type = nil, = {}) #:nodoc: execute "ALTER TABLE #{quote_table_name(table_name)} DROP COLUMN #{quote_column_name(column_name)} CASCADE CONSTRAINTS" ensure clear_table_columns_cache(table_name) self.all_schema_indexes = nil end |
#remove_foreign_key(from_table, options_or_to_table = {}) ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 416 def remove_foreign_key(from_table, = {}) super end |
#remove_index(table_name, options = {}) ⇒ Object
Remove the given index from the table. Gives warning if index does not exist
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 203 def remove_index(table_name, = {}) #:nodoc: index_name = index_name(table_name, ) unless index_name_exists?(table_name, index_name, true) # sometimes options can be String or Array with column names = {} unless .is_a?(Hash) if .has_key? :name = .dup .delete :column index_name_without_column = index_name(table_name, ) return index_name_without_column if index_name_exists?(table_name, index_name_without_column, false) end raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' does not exist" end remove_index!(table_name, index_name) end |
#remove_index!(table_name, index_name) ⇒ Object
clear cached indexes when removing index
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 220 def remove_index!(table_name, index_name) #:nodoc: #TODO: It should execute only when index_type == "UNIQUE" execute "ALTER TABLE #{quote_table_name(table_name)} DROP CONSTRAINT #{quote_column_name(index_name)}" rescue nil execute "DROP INDEX #{quote_column_name(index_name)}" ensure self.all_schema_indexes = nil end |
#rename_column(table_name, column_name, new_column_name) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 343 def rename_column(table_name, column_name, new_column_name) #:nodoc: execute "ALTER TABLE #{quote_table_name(table_name)} RENAME COLUMN #{quote_column_name(column_name)} to #{quote_column_name(new_column_name)}" self.all_schema_indexes = nil rename_column_indexes(table_name, column_name, new_column_name) ensure clear_table_columns_cache(table_name) end |
#rename_index(table_name, old_name, new_name) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 269 def rename_index(table_name, old_name, new_name) #:nodoc: unless index_name_exists?(table_name, old_name, true) raise ArgumentError, "Index name '#{old_name}' on table '#{table_name}' does not exist" end if new_name.length > allowed_index_name_length raise ArgumentError, "Index name '#{new_name}' on table '#{table_name}' is too long; the limit is #{allowed_index_name_length} characters" end execute "ALTER INDEX #{quote_column_name(old_name)} rename to #{quote_column_name(new_name)}" ensure self.all_schema_indexes = nil end |
#rename_table(table_name, new_name) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 102 def rename_table(table_name, new_name) #:nodoc: if new_name.to_s.length > table_name_length raise ArgumentError, "New table name '#{new_name}' is too long; the limit is #{table_name_length} characters" end if "#{new_name}_seq".to_s.length > sequence_name_length raise ArgumentError, "New sequence name '#{new_name}_seq' is too long; the limit is #{sequence_name_length} characters" end execute "RENAME #{quote_table_name(table_name)} TO #{quote_table_name(new_name)}" execute "RENAME #{quote_table_name("#{table_name}_seq")} TO #{quote_table_name("#{new_name}_seq")}" rescue nil rename_table_indexes(table_name, new_name) end |
#table_comment(table_name) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 368 def table_comment(table_name) #:nodoc: (owner, table_name, db_link) = @connection.describe(table_name) select_value <<-SQL SELECT comments FROM all_tab_comments#{db_link} WHERE owner = '#{owner}' AND table_name = '#{table_name}' SQL end |
#tablespace(table_name) ⇒ Object
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 395 def tablespace(table_name) select_value <<-SQL SELECT tablespace_name FROM user_tables WHERE table_name='#{table_name.to_s.upcase}' SQL end |
#type_to_sql(type, limit = nil, precision = nil, scale = nil) ⇒ Object
Maps logical Rails types to Oracle-specific data types.
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 388 def type_to_sql(type, limit = nil, precision = nil, scale = nil) #:nodoc: # Ignore options for :text and :binary columns return super(type, nil, nil, nil) if ['text', 'binary'].include?(type.to_s) super end |
#update_table_definition(table_name, base) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/oracle_enhanced/schema_statements.rb', line 161 def update_table_definition(table_name, base) #:nodoc: OracleEnhanced::Table.new(table_name, base) end |