Class: CartoDB::Client::Connection::PostgreSQL
- Includes:
- Helpers::SqlHelper
- Defined in:
- lib/cartodb-rb-client/cartodb/client/connection/postgres.rb
Constant Summary collapse
- DATA_TYPES_TRANSLATION_TABLE =
{ 'int4' => 'number', 'numeric' => 'number', 'text' => 'string', 'varchar' => 'string', 'date' => 'date', 'timestamp' => 'date', 'bool' => 'boolean', 'geometry' => 'geometry' }
Instance Method Summary collapse
- #add_column(table_name, column_name, column_type) ⇒ Object
- #change_column(table_name, old_column_name, new_column_name, column_type) ⇒ Object
- #create_table(table_name = nil, schema_or_file = nil, the_geom_type = 'Point') ⇒ Object
- #delete_row(table_name, row_id) ⇒ Object
- #drop_column(table_name, column_name) ⇒ Object
- #drop_table(table_name) ⇒ Object
-
#initialize(connection_settings) ⇒ PostgreSQL
constructor
A new instance of PostgreSQL.
- #insert_row(table_name, row) ⇒ Object
- #query(sql, options = {}) ⇒ Object
- #records(table_name, options = {}) ⇒ Object
- #row(table_name, row_id) ⇒ Object
- #table(table_name) ⇒ Object
- #tables ⇒ Object
- #update_row(table_name, row_id, row) ⇒ Object
Methods included from Helpers::SqlHelper
Constructor Details
#initialize(connection_settings) ⇒ PostgreSQL
Returns a new instance of PostgreSQL.
18 19 20 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 18 def initialize(connection_settings) @pg = connect_to_postgres(connection_settings) end |
Instance Method Details
#add_column(table_name, column_name, column_type) ⇒ Object
77 78 79 80 81 82 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 77 def add_column(table_name, column_name, column_type) @pg.query(<<-SQL ALTER TABLE #{table_name} ADD COLUMN #{column_name} #{column_type}; SQL ) end |
#change_column(table_name, old_column_name, new_column_name, column_type) ⇒ Object
91 92 93 94 95 96 97 98 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 91 def change_column(table_name, old_column_name, new_column_name, column_type) add_column table_name, new_column_name, column_type @pg.query(<<-SQL UPDATE #{table_name} SET #{new_column_name}=cast(#{old_column_name} as #{column_type}) SQL ) drop_column table_name, old_column_name end |
#create_table(table_name = nil, schema_or_file = nil, the_geom_type = 'Point') ⇒ Object
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 35 def create_table(table_name = nil, schema_or_file = nil, the_geom_type = 'Point') schema = schema_or_file if schema_or_file && schema_or_file.is_a?(Array) file = schema_or_file if schema_or_file && schema_or_file.is_a?(File) params = {:name => table_name} params[:file] = file if file table_name = table_name.sanitize if schema.nil? || schema.empty? schema = [] schema << {:name => 'name', :type => 'text'} if schema.select{|c| c[:name].eql?('name')}.empty? schema << {:name => 'description', :type => 'text'} if schema.select{|c| c[:name].eql?('description')}.empty? create_the_geom = "SELECT AddGeometryColumn('public', '#{table_name}', 'the_geom', 4326, 'POINT', 2)" end schema << {:name => 'cartodb_id', :type => 'serial', :extra => 'NOT NULL'} if schema.select{|c| c[:name].eql?('cartodb_id')}.empty? schema << {:name => 'created_at', :type => 'timestamp', :extra => 'without time zone DEFAULT current_timestamp::timestamp without time zone'} if schema.select{|c| c[:name].eql?('created_at')}.empty? schema << {:name => 'updated_at', :type => 'timestamp', :extra => 'without time zone DEFAULT current_timestamp::timestamp without time zone'} if schema.select{|c| c[:name].eql?('updated_at')}.empty? if schema.any? && schema.select{|c| c[:name].downcase.match(/geo/)}.any? the_geom_field = schema.select{|c| c[:name].downcase.match(/geo/)}.first create_the_geom = "SELECT AddGeometryColumn('public', '#{table_name}', 'the_geom', 4326, '#{the_geom_field[:geometry_type].upcase}', 2)" schema.reject!{|c| c[:name].downcase.match(/geo/)} end @pg.query(<<-SQL CREATE TABLE #{table_name} ( #{schema.map{|s| "#{s[:name]} #{s[:type]} #{s[:extra]}"}.join(', ')} ) WITH ( OIDS=FALSE ); ALTER TABLE #{table_name} OWNER TO #{@pg.user}; SQL ) @pg.query(create_the_geom) if create_the_geom table table_name end |
#delete_row(table_name, row_id) ⇒ Object
203 204 205 206 207 208 209 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 203 def delete_row(table_name, row_id) @pg.query(<<-SQL DELETE FROM #{table_name} WHERE cartodb_id = #{row_id} SQL ) end |
#drop_column(table_name, column_name) ⇒ Object
84 85 86 87 88 89 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 84 def drop_column(table_name, column_name) @pg.query(<<-SQL ALTER TABLE #{table_name} DROP COLUMN #{column_name}; SQL ) end |
#drop_table(table_name) ⇒ Object
151 152 153 154 155 156 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 151 def drop_table(table_name) @pg.query(<<-SQL DROP TABLE #{table_name} SQL ) end |
#insert_row(table_name, row) ⇒ Object
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 169 def insert_row(table_name, row) row = prepare_data(row) results = query(<<-SQL INSERT INTO #{table_name} (#{row.keys.join(',')}) VALUES (#{row.values.join(',')}); SELECT #{table_name}.cartodb_id as id, #{table_name}.* FROM #{table_name} WHERE cartodb_id = currval('public.#{table_name}_cartodb_id_seq'); SQL ) results.rows.first end |
#query(sql, options = {}) ⇒ Object
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 223 def query(sql, = {}) sql = sql.strip if sql if sql.include?('*') table_name = sql.match(/select(.*)\s((\w+\.)?\*)(.*)from\s+(\w*)[^;]*;?/im)[5] schema = table(table_name).schema if table_name sql.gsub!(/^select(.*)\s((\w+\.)?\*)(.*)from/im) do |matches| %Q{SELECT #{$1.strip} #{schema.map{|c| "#{$3}#{c[0]}"}.join(', ')} #{$4.strip} FROM} end end crono = Time.now begin result = @pg.query(<<-SQL #{sql} SQL ) rescue PGError => e raise CartoDB::Client::Error.new(nil, nil, nil, e.) end CartoDB::Types::Metadata.from_hash({ :time => Time.now - crono, :total_rows => result.cmd_tuples, :rows => result.map{|row| CartoDB::Types::Metadata.from_hash(row)} }) end |
#records(table_name, options = {}) ⇒ Object
211 212 213 214 215 216 217 218 219 220 221 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 211 def records(table_name, = {}) sql = <<-SQL SELECT #{table_name}.cartodb_id AS id, #{table_name}.* FROM #{table_name} SQL results = query(sql, ) results[:name] = table_name results end |
#row(table_name, row_id) ⇒ Object
158 159 160 161 162 163 164 165 166 167 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 158 def row(table_name, row_id) results = query(<<-SQL SELECT #{table_name}.cartodb_id as id, #{table_name}.* FROM #{table_name} WHERE cartodb_id = #{row_id}; SQL ) results.rows.first end |
#table(table_name) ⇒ Object
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 121 def table(table_name) pg_result = @pg.query(<<-SQL SELECT columns.table_name, columns.column_name, columns.udt_name as data_type, geo_cols.type as geometry_type FROM information_schema.tables tables INNER JOIN information_schema.columns columns ON columns.table_name = tables.table_name LEFT OUTER JOIN public.geometry_columns geo_cols ON geo_cols.f_table_schema = columns.table_schema AND geo_cols.f_table_name = columns.table_name AND geo_cols.f_geometry_column = columns.column_name WHERE tables.table_schema = 'public' AND tables.table_name not IN ('spatial_ref_sys', 'geometry_columns', 'geography_columns') AND tables.table_name ilike '#{table_name}' SQL ) if pg_result.to_a.empty? non_existing_table = @pg.query(<<-SQL SELECT tables.table_name FROM information_schema.tables tables WHERE tables.table_schema = 'public' AND tables.table_name not IN ('spatial_ref_sys', 'geometry_columns', 'geography_columns') AND tables.table_name ilike '#{table_name}' SQL ) raise CartoDB::Client::Error.new if non_existing_table.to_a.empty? end table_result = nil pg_result.each do |column| table_result = CartoDB::Types::Metadata.from_hash({:name => column['table_name'], :schema => []}) unless table_result table_result.schema << %W(#{column['column_name']} #{CartoDB::Client::Connection::PostgreSQL::DATA_TYPES_TRANSLATION_TABLE[column['data_type']]}) table_result.schema.last << CartoDB::Client::Connection::PostgreSQL::DATA_TYPES_TRANSLATION_TABLE[column['data_type']] if column['geometry_type'] table_result.schema.last << column['geometry_type'].downcase if column['geometry_type'] end table_result end |
#tables ⇒ Object
100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 100 def tables pg_result = @pg.query(<<-SQL SELECT columns.table_name, columns.column_name, columns.udt_name as data_type FROM information_schema.tables tables INNER JOIN information_schema.columns columns ON columns.table_name = tables.table_name WHERE tables.table_schema = 'public' AND tables.table_name not IN ('spatial_ref_sys', 'geometry_columns', 'geography_columns') SQL ) result = CartoDB::Types::Metadata.new tables = {} pg_result.each do |column| tables[column['table_name']] = CartoDB::Types::Metadata.from_hash({:name => column['table_name'], :schema => []}) unless tables[column['table_name']] tables[column['table_name']].schema << %W(#{column['column_name']} #{CartoDB::Client::Connection::PostgreSQL::DATA_TYPES_TRANSLATION_TABLE[column['data_type']]}) end result.total_entries = tables.to_a.length result.tables = tables.to_a.map(&:last) result end |
#update_row(table_name, row_id, row) ⇒ Object
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 |
# File 'lib/cartodb-rb-client/cartodb/client/connection/postgres.rb', line 186 def update_row(table_name, row_id, row) row = prepare_data(row) results = query(<<-SQL UPDATE #{table_name} SET (#{row.keys.join(',')}) = (#{row.values.join(',')}) WHERE cartodb_id = #{row_id}; SELECT #{table_name}.cartodb_id as id, #{table_name}.* FROM #{table_name} WHERE cartodb_id = currval('public.#{table_name}_cartodb_id_seq'); SQL ) results.rows.first end |