Module: ArJdbc::Oracle
- Included in:
- ActiveRecord::ConnectionAdapters::OracleAdapter
- Defined in:
- lib/arjdbc/oracle/column.rb,
lib/arjdbc/oracle/adapter.rb
Defined Under Namespace
Modules: Column Classes: TableDefinition
Constant Summary collapse
- ADAPTER_NAME =
'Oracle'.freeze
- NATIVE_DATABASE_TYPES =
{ :primary_key => "NUMBER(38) NOT NULL PRIMARY KEY", :string => { :name => "VARCHAR2", :limit => 255 }, :text => { :name => "CLOB" }, :integer => { :name => "NUMBER", :limit => 38 }, :float => { :name => "NUMBER" }, :decimal => { :name => "DECIMAL" }, :datetime => { :name => "DATE" }, :timestamp => { :name => "TIMESTAMP" }, :time => { :name => "DATE" }, :date => { :name => "DATE" }, :binary => { :name => "BLOB" }, :boolean => { :name => "NUMBER", :limit => 1 }, :raw => { :name => "RAW", :limit => 2000 }, :xml => { :name => 'XMLTYPE' } }
- IDENTIFIER_LENGTH =
30
Class Method Summary collapse
- .arel_visitor_type(config = nil) ⇒ Object
- .column_selector ⇒ Object
-
.emulate_booleans ⇒ Object
deprecated
Deprecated.
Use #emulate_booleans? instead.
- .emulate_booleans=(emulate) ⇒ Object
-
.emulate_booleans? ⇒ Boolean
Boolean emulation can be disabled using :.
- .jdbc_connection_class ⇒ Object
- .update_lob_values=(update) ⇒ Object
-
.update_lob_values? ⇒ Boolean
Updating records with LOB values (binary/text columns) in a separate statement can be disabled using :.
Instance Method Summary collapse
- #adapter_name ⇒ Object
- #add_column_options!(sql, options) ⇒ Object
- #add_limit_offset!(sql, options) ⇒ Object
-
#add_order_by_for_association_limiting!(sql, options) ⇒ Object
ORDER BY clause for the passed order option.
- #change_column(table_name, column_name, type, options = {}) ⇒ Object
- #change_column_default(table_name, column_name, default) ⇒ Object
- #charset ⇒ Object
- #collation ⇒ Object
- #column_name_length ⇒ Object
-
#columns(table_name, name = nil) ⇒ Object
NOTE: better to use current_schema instead of the configured one ?!.
- #columns_for_distinct(columns, orders) ⇒ Object
- #create_table(name, options = {}) ⇒ Object
- #current_database ⇒ Object
- #current_schema ⇒ Object
- #current_schema=(schema_owner) ⇒ Object
- #current_user ⇒ Object
- #database_parameters ⇒ Object
- #default_sequence_name(table_name, column = nil) ⇒ Object
-
#distinct(columns, order_by) ⇒ Object
SELECT DISTINCT clause for a given set of columns and a given ORDER BY clause.
- #drop_table(name, options = {}) ⇒ Object
- #exec_insert(sql, name, binds, pk = nil, sequence_name = nil) ⇒ Object
- #explain(arel, binds = []) ⇒ Object
-
#in_clause_length ⇒ Object
(also: #ids_in_list_limit)
Prevent ORA-01795 for in clauses with more than 1000.
- #index_name_length ⇒ Object
- #indexes(table, name = nil) ⇒ Object
- #insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) ⇒ Object
- #insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) ⇒ Object protected
- #jdbc_column_class ⇒ Object
- #modify_types(types) ⇒ Object
- #native_database_types ⇒ Object
- #next_sequence_value(sequence_name) ⇒ Object
-
#prefetch_primary_key?(table_name = nil) ⇒ Boolean
Returns true for Oracle adapter (since Oracle requires primary key values to be pre-fetched before insert).
- #quote(value, column = nil) ⇒ Object
- #quote_column_name(name) ⇒ Object
- #quote_raw(value) ⇒ Object
- #quote_table_name(name) ⇒ Object
-
#quoted_date(value, time = nil) ⇒ Object
Quote date/time values for use in SQL input.
- #release_savepoint(name = nil) ⇒ Object
- #remove_column(table_name, *column_names) ⇒ Object
- #remove_index(table_name, options = {}) ⇒ Object
- #rename_column(table_name, column_name, new_column_name) ⇒ Object
- #rename_table(name, new_name) ⇒ Object
- #select(sql, name = nil, binds = []) ⇒ Object
- #sql_for_insert(sql, pk, id_value, sequence_name, binds) ⇒ Object
- #supports_explain? ⇒ Boolean
- #supports_migrations? ⇒ Boolean
- #supports_primary_key? ⇒ Boolean
- #supports_savepoints? ⇒ Boolean
-
#table_alias_length ⇒ Object
maximum length of Oracle identifiers is 30.
- #table_definition(*args) ⇒ Object
- #table_name_length ⇒ Object
- #tables ⇒ Object
- #tablespace(table_name) ⇒ Object
- #temporary_table?(table_name) ⇒ Boolean
- #type_to_sql(type, limit = nil, precision = nil, scale = nil) ⇒ Object
- #unquote_table_name(name) ⇒ Object
- #update_lob_value?(value, column = nil) ⇒ Boolean
- #use_insert_returning? ⇒ Boolean
Class Method Details
.arel_visitor_type(config = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 87 def self.arel_visitor_type(config = nil) ::Arel::Visitors::Oracle end |
.column_selector ⇒ Object
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# File 'lib/arjdbc/oracle/column.rb', line 5 def self.column_selector [ /oracle/i, lambda { |config, column| column.extend(Column) } ] end |
.emulate_booleans ⇒ Object
Use #emulate_booleans? instead.
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# File 'lib/arjdbc/oracle/adapter.rb', line 67 def self.emulate_booleans; @@emulate_booleans; end |
.emulate_booleans=(emulate) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 69 def self.emulate_booleans=(emulate); @@emulate_booleans = emulate; end |
.emulate_booleans? ⇒ Boolean
Boolean emulation can be disabled using :
ArJdbc::Oracle.emulate_booleans = false
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# File 'lib/arjdbc/oracle/adapter.rb', line 65 def self.emulate_booleans?; @@emulate_booleans; end |
.jdbc_connection_class ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 29 def self.jdbc_connection_class ::ActiveRecord::ConnectionAdapters::OracleJdbcConnection end |
.update_lob_values=(update) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 49 def self.update_lob_values=(update); @@update_lob_values = update; end |
.update_lob_values? ⇒ Boolean
This only applies when prepared statements are not used.
Updating records with LOB values (binary/text columns) in a separate statement can be disabled using :
ArJdbc::Oracle.update_lob_values = false
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# File 'lib/arjdbc/oracle/adapter.rb', line 47 def self.update_lob_values?; @@update_lob_values; end |
Instance Method Details
#adapter_name ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 99 def adapter_name ADAPTER_NAME end |
#add_column_options!(sql, options) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 259 def (sql, ) # handle case of defaults for CLOB columns, which would otherwise get "quoted" incorrectly if () && (column = [:column]) && column.type == :text sql << " DEFAULT #{quote(.delete(:default))}" end super end |
#add_limit_offset!(sql, options) ⇒ Object
Only used with (non-AREL) ActiveRecord 2.3.
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# File 'lib/arjdbc/oracle/adapter.rb', line 215 def add_limit_offset!(sql, ) offset = [:offset] || 0 if limit = [:limit] sql.replace "SELECT * FROM " << "(select raw_sql_.*, rownum raw_rnum_ from (#{sql}) raw_sql_ where rownum <= #{offset + limit})" << " WHERE raw_rnum_ > #{offset}" elsif offset > 0 sql.replace "SELECT * FROM " << "(select raw_sql_.*, rownum raw_rnum_ from (#{sql}) raw_sql_)" << " WHERE raw_rnum_ > #{offset}" end end |
#add_order_by_for_association_limiting!(sql, options) ⇒ Object
ORDER BY clause for the passed order option.
Uses column aliases as defined by #distinct.
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# File 'lib/arjdbc/oracle/adapter.rb', line 324 def add_order_by_for_association_limiting!(sql, ) return sql if [:order].blank? order_columns = extract_order_columns([:order]) do |columns| columns.map! { |s| $1 if s =~ / (.*)/ }; columns end order = order_columns.map { |s, i| "alias_#{i}__ #{s}" } # @see {#distinct} sql << "ORDER BY #{order.join(', ')}" end |
#change_column(table_name, column_name, type, options = {}) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 268 def change_column(table_name, column_name, type, = {}) change_column_sql = "ALTER TABLE #{quote_table_name(table_name)} " << "MODIFY #{quote_column_name(column_name)} #{type_to_sql(type, [:limit])}" (change_column_sql, ) execute(change_column_sql) end |
#change_column_default(table_name, column_name, default) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 253 def change_column_default(table_name, column_name, default) execute "ALTER TABLE #{quote_table_name(table_name)} " + "MODIFY #{quote_column_name(column_name)} DEFAULT #{quote(default)}" end |
#charset ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 360 def charset database_parameters['NLS_CHARACTERSET'] end |
#collation ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 364 def collation database_parameters['NLS_COMP'] end |
#column_name_length ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 144 def column_name_length; IDENTIFIER_LENGTH; end |
#columns(table_name, name = nil) ⇒ Object
NOTE: better to use current_schema instead of the configured one ?!
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# File 'lib/arjdbc/oracle/adapter.rb', line 352 def columns(table_name, name = nil) @connection.columns_internal(table_name.to_s, nil, oracle_schema) end |
#columns_for_distinct(columns, orders) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 305 def columns_for_distinct(columns, orders) return columns if orders.blank? if orders.is_a?(Array) # AR 3.x vs 4.x orders = orders.map { |column| column.is_a?(String) ? column : column.to_sql } else orders = extract_order_columns(orders) end # construct a valid DISTINCT clause, ie. one that includes the ORDER BY columns, using # FIRST_VALUE such that the inclusion of these columns doesn't invalidate the DISTINCT order_columns = orders.map do |c, i| "FIRST_VALUE(#{c.split.first}) OVER (PARTITION BY #{columns} ORDER BY #{c}) AS alias_#{i}__" end columns = [ columns ]; columns.flatten! columns.push( *order_columns ).join(', ') end |
#create_table(name, options = {}) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 152 def create_table(name, = {}) super(name, ) unless [:id] == false seq_name = [:sequence_name] || default_sequence_name(name) start_value = [:sequence_start_value] || 10000 raise ActiveRecord::StatementInvalid.new("name #{seq_name} too long") if seq_name.length > table_alias_length execute "CREATE SEQUENCE #{quote_table_name(seq_name)} START WITH #{start_value}" end end |
#current_database ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 232 def current_database @current_database ||= execute("SELECT sys_context('userenv', 'db_name') db FROM dual").first['db'] end |
#current_schema ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 236 def current_schema execute("SELECT sys_context('userenv', 'current_schema') schema FROM dual").first['schema'] end |
#current_schema=(schema_owner) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 240 def current_schema=(schema_owner) execute("ALTER SESSION SET current_schema=#{schema_owner}") end |
#current_user ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 228 def current_user @current_user ||= execute("SELECT sys_context('userenv', 'session_user') su FROM dual").first['su'] end |
#database_parameters ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 368 def database_parameters return @database_parameters unless ( @database_parameters ||= {} ).empty? @connection.execute_query_raw("SELECT * FROM NLS_DATABASE_PARAMETERS") do |name, value| @database_parameters[name] = value end @database_parameters end |
#default_sequence_name(table_name, column = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 146 def default_sequence_name(table_name, column = nil) # TODO: remove schema prefix if present (before truncating) "#{table_name.to_s[0, IDENTIFIER_LENGTH - 4]}_seq" end |
#distinct(columns, order_by) ⇒ Object
SELECT DISTINCT clause for a given set of columns and a given ORDER BY clause.
Oracle requires the ORDER BY columns to be in the SELECT list for DISTINCT queries. However, with those columns included in the SELECT DISTINCT list, you won't actually get a distinct list of the column you want (presuming the column has duplicates with multiple values for the ordered-by columns. So we use the FIRST_VALUE function to get a single (first) value for each column, effectively making every row the same.
distinct("posts.id", "posts.created_at desc")
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# File 'lib/arjdbc/oracle/adapter.rb', line 300 def distinct(columns, order_by) "DISTINCT #{columns_for_distinct(columns, order_by)}" end |
#drop_table(name, options = {}) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 175 def drop_table(name, = {}) outcome = super(name) return outcome if name == 'schema_migrations' seq_name = .key?(:sequence_name) ? # pass nil/false - no sequence [:sequence_name] : default_sequence_name(name) return outcome unless seq_name execute "DROP SEQUENCE #{quote_table_name(seq_name)}" rescue nil end |
#exec_insert(sql, name, binds, pk = nil, sequence_name = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 561 def exec_insert(sql, name, binds, pk = nil, sequence_name = nil) if pk && use_insert_returning? exec_query(sql, name, binds) # due RETURNING clause else super(sql, name, binds) # assume no generated id for table end end |
#explain(arel, binds = []) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 490 def explain(arel, binds = []) sql = "EXPLAIN PLAN FOR #{to_sql(arel, binds)}" return if sql =~ /FROM all_/ exec_update(sql, 'EXPLAIN', binds) select_values("SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY)", 'EXPLAIN').join("\n") end |
#in_clause_length ⇒ Object Also known as: ids_in_list_limit
Prevent ORA-01795 for in clauses with more than 1000
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# File 'lib/arjdbc/oracle/adapter.rb', line 133 def in_clause_length 1000 end |
#index_name_length ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 143 def index_name_length; IDENTIFIER_LENGTH; end |
#indexes(table, name = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 209 def indexes(table, name = nil) @connection.indexes(table, name, @connection.connection..user_name) end |
#insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 547 def insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) # NOTE: ActiveRecord::Relation calls our {#next_sequence_value} # (from its `insert`) and passes the returned id_value here ... sql, binds = sql_for_insert(to_sql(arel, binds), pk, id_value, sequence_name, binds) if id_value exec_update(sql, name, binds) return id_value else value = exec_insert(sql, name, binds, pk, sequence_name) id_value || last_inserted_id(value) end end |
#insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) ⇒ Object (protected)
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# File 'lib/arjdbc/oracle/adapter.rb', line 522 def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) # if PK is already pre-fetched from sequence or if there is no PK : if id_value || pk.nil? execute(sql, name) return id_value end if pk && use_insert_returning? # true by default on AR <= 3.0 sql = "#{sql} RETURNING #{quote_column_name(pk)}" end execute(sql, name) end |
#jdbc_column_class ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 34 def jdbc_column_class ::ActiveRecord::ConnectionAdapters::OracleColumn end |
#modify_types(types) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 124 def modify_types(types) super(types) NATIVE_DATABASE_TYPES.each do |key, value| types[key] = value.dup end types end |
#native_database_types ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 120 def native_database_types super.merge(NATIVE_DATABASE_TYPES) end |
#next_sequence_value(sequence_name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 515 def next_sequence_value(sequence_name) sequence_name = quote_table_name(sequence_name) sql = "SELECT #{sequence_name}.NEXTVAL id FROM dual" log(sql, 'SQL') { @connection.next_sequence_value(sequence_name) } end |
#prefetch_primary_key?(table_name = nil) ⇒ Boolean
Returns true for Oracle adapter (since Oracle requires primary key values to be pre-fetched before insert).
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# File 'lib/arjdbc/oracle/adapter.rb', line 508 def prefetch_primary_key?(table_name = nil) return true if table_name.nil? table_name = table_name.to_s columns(table_name).count { |column| column.primary } == 1 end |
#quote(value, column = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 403 def quote(value, column = nil) return value if sql_literal?(value) column_type = column && column.type if column_type == :text || column_type == :binary return 'NULL' if value.nil? || value == '' if update_lob_value?(value, column) if /(.*?)\([0-9]+\)/ =~ ( sql_type = column.sql_type ) %Q{empty_#{ $1.downcase }()} else %Q{empty_#{ sql_type.respond_to?(:downcase) ? sql_type.downcase : 'blob' }()} end else "'#{quote_string(value.to_s)}'" end elsif column_type == :xml "XMLTYPE('#{quote_string(value)}')" # XMLTYPE ? elsif column_type == :raw quote_raw(value) else if column.respond_to?(:primary) && column.primary && column.klass != String return value.to_i.to_s end if column_type == :datetime || column_type == :time if value.acts_like?(:time) %Q{TO_DATE('#{get_time(value).strftime("%Y-%m-%d %H:%M:%S")}','YYYY-MM-DD HH24:MI:SS')} else value.blank? ? 'NULL' : %Q{DATE'#{value}'} # assume correctly formated DATE (string) end elsif ( like_date = value.acts_like?(:date) ) || column_type == :date if value.acts_like?(:time) # value.respond_to?(:strftime) %Q{DATE'#{get_time(value).strftime("%Y-%m-%d")}'} elsif like_date %Q{DATE'#{quoted_date(value)}'} # DATE 'YYYY-MM-DD' else value.blank? ? 'NULL' : %Q{DATE'#{value}'} # assume correctly formated DATE (string) end elsif ( like_time = value.acts_like?(:time) ) || column_type == :timestamp if like_time %Q{TIMESTAMP'#{quoted_date(value, true)}'} # TIMESTAMP 'YYYY-MM-DD HH24:MI:SS.FF' else value.blank? ? 'NULL' : %Q{TIMESTAMP'#{value}'} # assume correctly formated TIMESTAMP (string) end else super end end end |
#quote_column_name(name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 384 def quote_column_name(name) # if only valid lowercase column characters in name if ( name = name.to_s ) =~ /\A[a-z][a-z_0-9\$#]*\Z/ # putting double-quotes around an identifier causes Oracle to treat the # identifier as case sensitive (otherwise assumes case-insensitivity) ! # all upper case is an exception, where double-quotes are meaningless "\"#{name.upcase}\"" # name.upcase else # remove double quotes which cannot be used inside quoted identifier "\"#{name.gsub('"', '')}\"" end end |
#quote_raw(value) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 465 def quote_raw(value) value = value.unpack('C*') if value.is_a?(String) "'#{value.map { |x| "%02X" % x }.join}'" end |
#quote_table_name(name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 379 def quote_table_name(name) name.to_s.split('.').map{ |n| n.split('@').map{ |m| quote_column_name(m) }.join('@') }.join('.') end |
#quoted_date(value, time = nil) ⇒ Object
Quote date/time values for use in SQL input. Includes milliseconds if the value is a Time responding to usec.
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# File 'lib/arjdbc/oracle/adapter.rb', line 456 def quoted_date(value, time = nil) if time || ( time.nil? && value.acts_like?(:time) ) usec = value.respond_to?(:usec) && (value.usec / 10000.0).round # .428000 -> .43 return "#{get_time(value).to_s(:db)}.#{sprintf("%02d", usec)}" if usec # value.strftime("%Y-%m-%d %H:%M:%S") end value.to_s(:db) end |
#release_savepoint(name = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 245 def release_savepoint(name = nil) # no RELEASE SAVEPOINT statement in Oracle (JDBC driver throws "Unsupported feature") end |
#remove_column(table_name, *column_names) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 282 def remove_column(table_name, *column_names) for column_name in column_names.flatten execute "ALTER TABLE #{quote_table_name(table_name)} DROP COLUMN #{quote_column_name(column_name)}" end end |
#remove_index(table_name, options = {}) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 249 def remove_index(table_name, = {}) execute "DROP INDEX #{index_name(table_name, )}" end |
#rename_column(table_name, column_name, new_column_name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 276 def rename_column(table_name, column_name, new_column_name) execute "ALTER TABLE #{quote_table_name(table_name)} " << "RENAME COLUMN #{quote_column_name(column_name)} TO #{quote_column_name(new_column_name)}" end |
#rename_table(name, new_name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 163 def rename_table(name, new_name) 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(name)} TO #{quote_table_name(new_name)}" execute "RENAME #{quote_table_name("#{name}_seq")} TO #{quote_table_name("#{new_name}_seq")}" rescue nil end |
#select(sql, name = nil, binds = []) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 497 def select(sql, name = nil, binds = []) result = super # AR::Result (4.0) or Array (<= 3.2) result.columns.delete('raw_rnum_') if result.respond_to?(:columns) result.each { |row| row.delete('raw_rnum_') } # Hash rows even for AR::Result result end |
#sql_for_insert(sql, pk, id_value, sequence_name, binds) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 537 def sql_for_insert(sql, pk, id_value, sequence_name, binds) unless id_value || pk.nil? if pk && use_insert_returning? sql = "#{sql} RETURNING #{quote_column_name(pk)}" end end [ sql, binds ] end |
#supports_explain? ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 486 def supports_explain? true end |
#supports_migrations? ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 471 def supports_migrations? true end |
#supports_primary_key? ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 476 def supports_primary_key? true end |
#supports_savepoints? ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 481 def supports_savepoints? true end |
#table_alias_length ⇒ Object
maximum length of Oracle identifiers is 30
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# File 'lib/arjdbc/oracle/adapter.rb', line 141 def table_alias_length; IDENTIFIER_LENGTH; end |
#table_definition(*args) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 83 def table_definition(*args) new_table_definition(TableDefinition, *args) end |
#table_name_length ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 142 def table_name_length; IDENTIFIER_LENGTH; end |
#tables ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 347 def tables @connection.tables(nil, oracle_schema) end |
#tablespace(table_name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 356 def tablespace(table_name) select_value "SELECT tablespace_name FROM user_tables WHERE table_name='#{table_name.to_s.upcase}'" end |
#temporary_table?(table_name) ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 343 def temporary_table?(table_name) select_value("SELECT temporary FROM user_tables WHERE table_name = '#{table_name.upcase}'") == 'Y' end |
#type_to_sql(type, limit = nil, precision = nil, scale = nil) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 185 def type_to_sql(type, limit = nil, precision = nil, scale = nil) case type.to_sym when :binary # { BLOB | BINARY LARGE OBJECT } [ ( length [{K |M |G }] ) ] # although Oracle does not like limit (length) with BLOB (or CLOB) : # # CREATE TABLE binaries (data BLOB, short_data BLOB(1024)); # ORA-00907: missing right parenthesis * # # TODO do we need to worry about NORMAL vs. non IN-TABLE BLOBs ?! # http://dba.stackexchange.com/questions/8770/improve-blob-writing-performance-in-oracle-11g # - if the LOB is smaller than 3900 bytes it can be stored inside the # table row; by default this is enabled, # unless you specify DISABLE STORAGE IN ROW # - normal LOB - stored in a separate segment, outside of table, # you may even put it in another tablespace; super(type, nil, nil, nil) when :text super(type, nil, nil, nil) else super end end |
#unquote_table_name(name) ⇒ Object
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# File 'lib/arjdbc/oracle/adapter.rb', line 397 def unquote_table_name(name) name = name[1...-1] if name[0, 1] == '"' name.upcase == name ? name.downcase : name end |
#update_lob_value?(value, column = nil) ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 53 def update_lob_value?(value, column = nil) Oracle.update_lob_values? && ! prepared_statements? && ! ( value.nil? || value == '' ) end |
#use_insert_returning? ⇒ Boolean
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# File 'lib/arjdbc/oracle/adapter.rb', line 580 def use_insert_returning? if ( @use_insert_returning ||= nil ).nil? @use_insert_returning = false end @use_insert_returning end |