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]}"
45 if defined?(ActiveRecord::ConnectionAdapters::MysqlAdapter)
47 alias_method :old_native_database_types, :native_database_types
49 def native_database_types
50 types = old_native_database_types
51 types[:bigint] = { :name => "bigint", :limit => 20 }
52 types[:double] = { :name => "double" }
53 types[:integer_pk] = { :name => "integer DEFAULT NULL auto_increment PRIMARY KEY" }
54 types[:bigint_pk] = { :name => "bigint(20) DEFAULT NULL auto_increment PRIMARY KEY" }
55 types[:bigint_pk_64] = { :name => "bigint(64) DEFAULT NULL auto_increment PRIMARY KEY" }
56 types[:bigint_auto_64] = { :name => "bigint(64) DEFAULT NULL auto_increment" }
57 types[:bigint_auto_11] = { :name => "bigint(11) DEFAULT NULL auto_increment" }
58 types[:bigint_auto_20] = { :name => "bigint(20) DEFAULT NULL auto_increment" }
59 types[:four_byte_unsigned] = { :name=> "integer unsigned" }
60 types[:inet] = { :name=> "integer unsigned" }
62 enumerations.each do |e,v|
63 types[e.to_sym]= { :name => "enum('#{v.join '\',\''}')" }
69 def change_column(table_name, column_name, type, options = {})
70 unless options_include_default?(options)
71 options[:default] = select_one("SHOW COLUMNS FROM #{table_name} LIKE '#{column_name}'")["Default"]
73 unless type == :string or type == :text
74 options.delete(:default) if options[:default] = "";
78 change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
79 add_column_options!(change_column_sql, options)
80 execute(change_column_sql)
84 return { :id => false, :force => true, :options => "ENGINE=MyIsam" }
88 return { :id => false, :force => true, :options => "ENGINE=InnoDB" }
92 return "ENGINE=InnoDB"
95 def change_engine (table_name, engine)
96 execute "ALTER TABLE #{table_name} ENGINE = #{engine}"
99 def add_fulltext_index (table_name, column)
100 execute "CREATE FULLTEXT INDEX `#{table_name}_#{column}_idx` ON `#{table_name}` (`#{column}`)"
104 @enumerations ||= Hash.new
107 def create_enumeration (enumeration_name, values)
108 enumerations[enumeration_name] = values
111 def drop_enumeration (enumeration_name)
112 enumerations.delete(enumeration_name)
115 def alter_primary_key(table_name, new_columns)
116 execute("alter table #{table_name} drop primary key, add primary key (#{new_columns.join(',')})")
119 def interval_constant(interval)
125 if defined?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter)
126 class PostgreSQLAdapter
127 alias_method :old_native_database_types, :native_database_types
129 def native_database_types
130 types = old_native_database_types
131 types[:double] = { :name => "double precision" }
132 types[:integer_pk] = { :name => "serial PRIMARY KEY" }
133 types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
134 types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
135 types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
136 types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
137 types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
138 types[:four_byte_unsigned] = { :name => "bigint" } # meh
139 types[:inet] = { :name=> "inet" }
141 enumerations.each_key do |e|
142 types[e.to_sym]= { :name => e }
149 return { :id => false, :force => true, :options => ""}
153 return { :id => false, :force => true, :options => ""}
160 def change_engine (table_name, engine)
163 def add_fulltext_index (table_name, column)
164 execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
168 @enumerations ||= Hash.new
171 def create_enumeration(enumeration_name, values)
172 enumerations[enumeration_name] = values
173 execute "CREATE TYPE #{enumeration_name} AS ENUM ('#{values.join '\',\''}')"
176 def drop_enumeration(enumeration_name)
177 execute "DROP TYPE #{enumeration_name}"
178 enumerations.delete(enumeration_name)
181 def rename_enumeration(old_name, new_name)
182 execute "ALTER TYPE #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"
185 def alter_primary_key(table_name, new_columns)
186 execute "ALTER TABLE #{table_name} DROP CONSTRAINT #{table_name}_pkey"
187 execute "ALTER TABLE #{table_name} ADD PRIMARY KEY (#{new_columns.join(',')})"
190 def interval_constant(interval)
191 "'#{interval}'::interval"
194 def add_index(table_name, column_name, options = {})
195 column_names = Array(column_name)
196 index_name = index_name(table_name, :column => column_names)
198 if Hash === options # legacy support, since this param was a string
199 index_type = options[:unique] ? "UNIQUE" : ""
200 index_name = options[:name] || index_name
201 index_method = options[:method] || "BTREE"
206 quoted_column_names = column_names.map { |e| quote_column_name(e) }
207 if Hash === options and options[:lowercase]
208 quoted_column_names = quoted_column_names.map { |e| "LOWER(#{e})" }
210 quoted_column_names = quoted_column_names.join(", ")
212 execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} USING #{index_method} (#{quoted_column_names})"
216 def rename_index(table_name, old_name, new_name)
217 execute "ALTER INDEX #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"
220 def rename_sequence(table_name, old_name, new_name)
221 execute "ALTER SEQUENCE #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"