2 module ConnectionAdapters
3 module SchemaStatements
4 def quote_column_names(column_name)
5 Array(column_name).map { |e| quote_column_name(e) }.join(", ")
8 def add_primary_key(table_name, column_name, options = {})
9 column_names = Array(column_name)
10 quoted_column_names = column_names.map { |e| quote_column_name(e) }.join(", ")
11 execute "ALTER TABLE #{table_name} ADD PRIMARY KEY (#{quoted_column_names})"
14 def remove_primary_key(table_name)
15 execute "ALTER TABLE #{table_name} DROP PRIMARY KEY"
18 def add_foreign_key(table_name, column_name, reftbl, refcol = nil)
19 execute "ALTER TABLE #{table_name} ADD " +
20 "FOREIGN KEY (#{quote_column_names(column_name)}) " +
21 "REFERENCES #{reftbl} (#{quote_column_names(refcol || column_name)})"
24 alias_method :old_options_include_default?, :options_include_default?
26 def options_include_default?(options)
27 return false if options[:options] =~ /AUTO_INCREMENT/i
28 return old_options_include_default?(options)
31 alias_method :old_add_column_options!, :add_column_options!
33 def add_column_options!(sql, options)
34 sql << " UNSIGNED" if options[:unsigned]
35 old_add_column_options!(sql, options)
36 sql << " #{options[:options]}"
41 if MysqlAdapter.public_instance_methods(false).include?('native_database_types')
42 alias_method :old_native_database_types, :native_database_types
45 def native_database_types
46 types = old_native_database_types
47 types[:bigint] = { :name => "bigint", :limit => 20 }
48 types[:double] = { :name => "double" }
49 types[:integer_pk] = { :name => "integer DEFAULT NULL auto_increment PRIMARY KEY" }
50 types[:bigint_pk] = { :name => "bigint(20) DEFAULT NULL auto_increment PRIMARY KEY" }
51 types[:bigint_pk_64] = { :name => "bigint(64) DEFAULT NULL auto_increment PRIMARY KEY" }
52 types[:bigint_auto_64] = { :name => "bigint(64) DEFAULT NULL auto_increment" }
53 types[:bigint_auto_11] = { :name => "bigint(11) DEFAULT NULL auto_increment" }
54 types[:bigint_auto_20] = { :name => "bigint(20) DEFAULT NULL auto_increment" }
55 types[:four_byte_unsigned] = { :name=> "integer unsigned" }
56 types[:inet] = { :name=> "integer unsigned" }
60 def change_column(table_name, column_name, type, options = {})
61 unless options_include_default?(options)
62 options[:default] = select_one("SHOW COLUMNS FROM #{table_name} LIKE '#{column_name}'")["Default"]
64 unless type == :string or type == :text
65 options.delete(:default) if options[:default] = "";
69 change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
70 add_column_options!(change_column_sql, options)
71 execute(change_column_sql)
75 return { :id => false, :force => true, :options => "ENGINE=MyIsam" }
79 return { :id => false, :force => true, :options => "ENGINE=InnoDB" }
83 return "ENGINE=InnoDB"
86 def change_engine (table_name, engine)
87 execute "ALTER TABLE #{table_name} ENGINE = #{engine}"
90 def add_fulltext_index (table_name, column)
91 execute "CREATE FULLTEXT INDEX `#{table_name}_#{column}_idx` ON `#{table_name}` (`#{column}`)"
94 def alter_column_nwr_enum (table_name, column)
95 execute "alter table #{table_name} change column #{column} #{column} enum('node','way','relation');"
98 def alter_primary_key(table_name, new_columns)
99 execute("alter table #{table_name} drop primary key, add primary key (#{new_columns.join(',')})")
103 class PostgreSQLAdapter
104 if PostgreSQLAdapter.public_instance_methods(false).include?('native_database_types')
105 alias_method :old_native_database_types, :native_database_types
108 def native_database_types
109 types = old_native_database_types
110 types[:double] = { :name => "double precision" }
111 types[:integer_pk] = { :name => "serial PRIMARY KEY" }
112 types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
113 types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
114 types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
115 types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
116 types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
117 types[:four_byte_unsigned] = { :name => "bigint" } # meh
118 types[:inet] = { :name=> "inet" }
123 return { :id => false, :force => true, :options => ""}
127 return { :id => false, :force => true, :options => ""}
134 def change_engine (table_name, engine)
137 def add_fulltext_index (table_name, column)
138 execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
141 def alter_column_nwr_enum (table_name, column)
142 response = select_one("select count(*) as count from pg_type where typname = 'nwr_enum'")
143 if response['count'] == "0" #yep, as a string
144 execute "create type nwr_enum as ENUM ('node', 'way', 'relation')"
146 execute "alter table #{table_name} drop #{column}"
147 execute "alter table #{table_name} add #{column} nwr_enum"
150 def alter_primary_key(table_name, new_columns)
151 execute "alter table #{table_name} drop constraint #{table_name}_pkey; alter table #{table_name} add primary key (#{new_columns.join(',')})"