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 if MysqlAdapter.public_instance_methods(false).include?('native_database_types')
47 alias_method :old_native_database_types, :native_database_types
50 def native_database_types
51 types = old_native_database_types
52 types[:bigint] = { :name => "bigint", :limit => 20 }
53 types[:double] = { :name => "double" }
54 types[:integer_pk] = { :name => "integer DEFAULT NULL auto_increment PRIMARY KEY" }
55 types[:bigint_pk] = { :name => "bigint(20) DEFAULT NULL auto_increment PRIMARY KEY" }
56 types[:bigint_pk_64] = { :name => "bigint(64) DEFAULT NULL auto_increment PRIMARY KEY" }
57 types[:bigint_auto_64] = { :name => "bigint(64) DEFAULT NULL auto_increment" }
58 types[:bigint_auto_11] = { :name => "bigint(11) DEFAULT NULL auto_increment" }
59 types[:bigint_auto_20] = { :name => "bigint(20) DEFAULT NULL auto_increment" }
60 types[:four_byte_unsigned] = { :name=> "integer unsigned" }
61 types[:inet] = { :name=> "integer unsigned" }
65 def change_column(table_name, column_name, type, options = {})
66 unless options_include_default?(options)
67 options[:default] = select_one("SHOW COLUMNS FROM #{table_name} LIKE '#{column_name}'")["Default"]
69 unless type == :string or type == :text
70 options.delete(:default) if options[:default] = "";
74 change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
75 add_column_options!(change_column_sql, options)
76 execute(change_column_sql)
80 return { :id => false, :force => true, :options => "ENGINE=MyIsam" }
84 return { :id => false, :force => true, :options => "ENGINE=InnoDB" }
88 return "ENGINE=InnoDB"
91 def change_engine (table_name, engine)
92 execute "ALTER TABLE #{table_name} ENGINE = #{engine}"
95 def add_fulltext_index (table_name, column)
96 execute "CREATE FULLTEXT INDEX `#{table_name}_#{column}_idx` ON `#{table_name}` (`#{column}`)"
99 def alter_column_nwr_enum (table_name, column)
100 execute "alter table #{table_name} change column #{column} #{column} enum('Node','Way','Relation');"
103 def alter_primary_key(table_name, new_columns)
104 execute("alter table #{table_name} drop primary key, add primary key (#{new_columns.join(',')})")
107 def interval_constant(interval)
112 class PostgreSQLAdapter
113 if PostgreSQLAdapter.public_instance_methods(false).include?('native_database_types')
114 alias_method :old_native_database_types, :native_database_types
117 def native_database_types
118 types = old_native_database_types
119 types[:double] = { :name => "double precision" }
120 types[:integer_pk] = { :name => "serial PRIMARY KEY" }
121 types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
122 types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
123 types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
124 types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
125 types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
126 types[:four_byte_unsigned] = { :name => "bigint" } # meh
127 types[:inet] = { :name=> "inet" }
132 return { :id => false, :force => true, :options => ""}
136 return { :id => false, :force => true, :options => ""}
143 def change_engine (table_name, engine)
146 def add_fulltext_index (table_name, column)
147 execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
150 def alter_column_nwr_enum (table_name, column)
151 response = select_one("select count(*) as count from pg_type where typname = 'nwr_enum'")
152 if response['count'] == "0" #yep, as a string
153 execute "create type nwr_enum as ENUM ('Node', 'Way', 'Relation')"
155 execute "alter table #{table_name} drop #{column}"
156 execute "alter table #{table_name} add #{column} nwr_enum"
159 def alter_primary_key(table_name, new_columns)
160 execute "alter table #{table_name} drop constraint #{table_name}_pkey; alter table #{table_name} add primary key (#{new_columns.join(',')})"
163 def interval_constant(interval)
164 "'#{interval}'::interval"
167 def add_index(table_name, column_name, options = {})
168 column_names = Array(column_name)
169 index_name = index_name(table_name, :column => column_names)
171 if Hash === options # legacy support, since this param was a string
172 index_type = options[:unique] ? "UNIQUE" : ""
173 index_name = options[:name] || index_name
174 index_method = options[:method] || "BTREE"
178 quoted_column_names = column_names.map { |e| quote_column_name(e) }.join(", ")
179 execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} USING #{index_method} (#{quoted_column_names})"