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 def remove_foreign_key(table_name, column_name, reftbl, refcol = nil)
25 execute "ALTER TABLE #{table_name} DROP " +
26 "CONSTRAINT #{table_name}_#{column_name[0]}_fkey"
29 alias_method :old_options_include_default?, :options_include_default?
31 def options_include_default?(options)
32 return false if options[:options] =~ /AUTO_INCREMENT/i
33 return old_options_include_default?(options)
36 alias_method :old_add_column_options!, :add_column_options!
38 def add_column_options!(sql, options)
39 sql << " UNSIGNED" if options[:unsigned]
40 old_add_column_options!(sql, options)
41 sql << " #{options[:options]}"
46 alias_method :old_native_database_types, :native_database_types
48 def native_database_types
49 types = old_native_database_types
50 types[:bigint] = { :name => "bigint", :limit => 20 }
51 types[:double] = { :name => "double" }
52 types[:integer_pk] = { :name => "integer DEFAULT NULL auto_increment PRIMARY KEY" }
53 types[:bigint_pk] = { :name => "bigint(20) DEFAULT NULL auto_increment PRIMARY KEY" }
54 types[:bigint_pk_64] = { :name => "bigint(64) DEFAULT NULL auto_increment PRIMARY KEY" }
55 types[:bigint_auto_64] = { :name => "bigint(64) DEFAULT NULL auto_increment" }
56 types[:bigint_auto_11] = { :name => "bigint(11) DEFAULT NULL auto_increment" }
57 types[:bigint_auto_20] = { :name => "bigint(20) DEFAULT NULL auto_increment" }
58 types[:four_byte_unsigned] = { :name=> "integer unsigned" }
59 types[:inet] = { :name=> "integer unsigned" }
61 enumerations.each do |e,v|
62 types[e.to_sym]= { :name => "enum('#{v.join '\',\''}')" }
68 def change_column(table_name, column_name, type, options = {})
69 unless options_include_default?(options)
70 options[:default] = select_one("SHOW COLUMNS FROM #{table_name} LIKE '#{column_name}'")["Default"]
72 unless type == :string or type == :text
73 options.delete(:default) if options[:default] = "";
77 change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
78 add_column_options!(change_column_sql, options)
79 execute(change_column_sql)
83 return { :id => false, :force => true, :options => "ENGINE=MyIsam" }
87 return { :id => false, :force => true, :options => "ENGINE=InnoDB" }
91 return "ENGINE=InnoDB"
94 def change_engine (table_name, engine)
95 execute "ALTER TABLE #{table_name} ENGINE = #{engine}"
98 def add_fulltext_index (table_name, column)
99 execute "CREATE FULLTEXT INDEX `#{table_name}_#{column}_idx` ON `#{table_name}` (`#{column}`)"
103 @enumerations ||= Hash.new
106 def create_enumeration (enumeration_name, values)
107 enumerations[enumeration_name] = values
110 def drop_enumeration (enumeration_name)
111 enumerations.delete(enumeration_name)
114 def alter_primary_key(table_name, new_columns)
115 execute("alter table #{table_name} drop primary key, add primary key (#{new_columns.join(',')})")
118 def interval_constant(interval)
123 class PostgreSQLAdapter
124 alias_method :old_native_database_types, :native_database_types
126 def native_database_types
127 types = old_native_database_types
128 types[:double] = { :name => "double precision" }
129 types[:integer_pk] = { :name => "serial PRIMARY KEY" }
130 types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
131 types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
132 types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
133 types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
134 types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
135 types[:four_byte_unsigned] = { :name => "bigint" } # meh
136 types[:inet] = { :name=> "inet" }
138 enumerations.each_key do |e|
139 types[e.to_sym]= { :name => e }
146 return { :id => false, :force => true, :options => ""}
150 return { :id => false, :force => true, :options => ""}
157 def change_engine (table_name, engine)
160 def add_fulltext_index (table_name, column)
161 execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
165 @enumerations ||= Hash.new
168 def create_enumeration (enumeration_name, values)
169 enumerations[enumeration_name] = values
170 execute "create type #{enumeration_name} as enum ('#{values.join '\',\''}')"
173 def drop_enumeration (enumeration_name)
174 execute "drop type #{enumeration_name}"
175 enumerations.delete(enumeration_name)
178 def alter_primary_key(table_name, new_columns)
179 execute "alter table #{table_name} drop constraint #{table_name}_pkey; alter table #{table_name} add primary key (#{new_columns.join(',')})"
182 def interval_constant(interval)
183 "'#{interval}'::interval"
186 def add_index(table_name, column_name, options = {})
187 column_names = Array(column_name)
188 index_name = index_name(table_name, :column => column_names)
190 if Hash === options # legacy support, since this param was a string
191 index_type = options[:unique] ? "UNIQUE" : ""
192 index_name = options[:name] || index_name
193 index_method = options[:method] || "BTREE"
198 quoted_column_names = column_names.map { |e| quote_column_name(e) }
199 if Hash === options and options[:lowercase]
200 quoted_column_names = quoted_column_names.map { |e| "LOWER(#{e})" }
202 quoted_column_names = quoted_column_names.join(", ")
204 execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} USING #{index_method} (#{quoted_column_names})"