Class: KnjDB_sqlite3::Tables::Table
- Defined in:
- lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb
Instance Method Summary collapse
- #clone(newname) ⇒ Object
- #column(name) ⇒ Object
- #columns ⇒ Object
- #copy(args = {}) ⇒ Object
- #create_column_programmatic(col_data) ⇒ Object
- #create_columns(col_arr) ⇒ Object
- #create_indexes(index_arr, args = nil) ⇒ Object
- #data ⇒ Object
-
#drop ⇒ Object
Drops the table from the database.
- #index(name) ⇒ Object
- #indexes ⇒ Object
-
#initialize(args) ⇒ Table
constructor
A new instance of Table.
- #insert(data) ⇒ Object
- #maxlength ⇒ Object
- #name ⇒ Object
-
#native? ⇒ Boolean
Returns true if the table is safe to drop.
- #optimize ⇒ Object
- #reload ⇒ Object
- #rename(newname) ⇒ Object
- #rows_count ⇒ Object
- #table ⇒ Object
- #truncate ⇒ Object
- #type ⇒ Object
Constructor Details
#initialize(args) ⇒ Table
Returns a new instance of Table.
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 98 def initialize(args) @db = args[:db] @data = args[:data] @list = Wref_map.new @indexes_list = Wref_map.new end |
Instance Method Details
#clone(newname) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 240 def clone(newname) raise "Invalid name." if newname.to_s.strip.length <= 0 cols_cur = self.columns sql = "CREATE TABLE `#{newname}` (" first = true cols_cur.each do |name, col| sql << ", " if !first first = false if first sql << @db.cols.data_sql(col.data) end sql << ");" @db.query(sql) sql = "INSERT INTO `#{newname}` SELECT * FROM `#{self.name}`" @db.query(sql) return @db.tables[newname] end |
#column(name) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 157 def column(name) list = self.columns return list[name] if list[name] raise Errno::ENOENT.new("Column not found: #{name}.") end |
#columns ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 163 def columns @db.cols ret = {} @db.q("PRAGMA table_info(`#{@db.esc_table(self.name)}`)") do |d_cols| obj = @list.get!(d_cols[:name]) if !obj obj = KnjDB_sqlite3::Columns::Column.new( :table_name => self.name, :db => @db, :data => d_cols ) @list[d_cols[:name]] = obj end if block_given? yield(obj) else ret[d_cols[:name]] = obj end end if block_given? return nil else return ret end end |
#copy(args = {}) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 260 def copy(args = {}) temp_name = "temptable_#{Time.now.to_f.to_s.hash}" cloned_tabled = self.clone(temp_name) cols_cur = self.columns @db.query("DROP TABLE `#{self.name}`") sql = "CREATE TABLE `#{self.name}` (" first = true cols_cur.each do |name, col| next if args["drops"] and args["drops"].index(name) != nil sql << ", " if !first first = false if first if args.key?("alter_columns") and args["alter_columns"][name.to_s] sql << @db.cols.data_sql(args["alter_columns"][name.to_s]) else sql << @db.cols.data_sql(col.data) end if args["new"] args["new"].each do |col_data| if col_data["after"] and col_data["after"] == name sql << ", #{@db.cols.data_sql(col_data)}" end end end end sql << ");" @db.query(sql) sql = "INSERT INTO `#{self.name}` SELECT " first = true cols_cur.each do |name, col| next if args["drops"] and args["drops"].index(name) != nil sql << ", " if !first first = false if first sql << "`#{name}`" if args["news"] args["news"].each do |col_data| if col_data["after"] and col_data["after"] == name sql << ", ''" end end end end sql << " FROM `#{temp_name}`" @db.query(sql) @db.query("DROP TABLE `#{temp_name}`") end |
#create_column_programmatic(col_data) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 203 def create_column_programmatic(col_data) temp_name = "temptable_#{Time.now.to_f.to_s.hash}" cloned_tabled = self.clone(temp_name) cols_cur = self.columns @db.query("DROP TABLE `#{self.name}`") sql = "CREATE TABLE `#{self.name}` (" first = true cols_cur.each do |name, col| sql << ", " if !first first = false if first sql << @db.cols.data_sql(col.data) if col_data["after"] and col_data["after"] == name sql << ", #{@db.cols.data_sql(col_data)}" end end sql << ");" @db.query(sql) sql = "INSERT INTO `#{self.name}` SELECT " first = true cols_cur.each do |name, col| sql << ", " if !first first = false if first sql << "`#{name}`" if col_data["after"] and col_data["after"] == name sql << ", ''" end end sql << " FROM `#{temp_name}`" @db.query(sql) @db.query("DROP TABLE `#{temp_name}`") end |
#create_columns(col_arr) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 193 def create_columns(col_arr) col_arr.each do |col_data| #if col_data.key?("after") # self.create_column_programmatic(col_data) #else @db.query("ALTER TABLE `#{self.name}` ADD COLUMN #{@db.cols.data_sql(col_data)};") #end end end |
#create_indexes(index_arr, args = nil) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 386 def create_indexes(index_arr, args = nil) if args and args[:return_sql] ret = [] end index_arr.each do |index_data| if index_data.is_a?(String) index_data = {"name" => index_data, "columns" => [index_data]} end raise "No name was given." if !index_data.key?("name") or index_data["name"].strip.length <= 0 raise "No columns was given on index #{index_data["name"]}." if index_data["columns"].empty? name = index_data["name"] name = "#{self.name}__#{name}" if @db.opts[:index_append_table_name] sql = "CREATE INDEX '#{@db.esc_col(name)}' ON `#{@db.esc_table(self.name)}` (" first = true index_data["columns"].each do |col_name| sql << ", " if !first first = false if first sql << "`#{@db.esc_col(col_name)}`" end sql << ")" if args and args[:return_sql] ret << sql else @db.query(sql) end end if args and args[:return_sql] return ret else return nil end end |
#data ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 428 def data ret = { "name" => name, "columns" => [], "indexes" => [] } columns.each do |name, column| ret["columns"] << column.data end indexes.each do |name, index| ret["indexes"] << index.data if name != "PRIMARY" end return ret end |
#drop ⇒ Object
Drops the table from the database.
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 128 def drop raise "Cant drop native table: '#{self.name}'." if self.native? @db.query("DROP TABLE `#{self.name}`") end |
#index(name) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 315 def index(name) name = name.to_s begin return @indexes_list[name] rescue Wref::Recycled if @db.opts[:index_append_table_name] tryname = "#{self.name}__#{name}" begin return @indexes_list[tryname] rescue Wref::Recycled #ignore. end else #ignore end end self.indexes do |index| return index if index.name.to_s == name end raise Errno::ENOENT.new("Index not found: #{name}.") end |
#indexes ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 341 def indexes @db.indexes ret = {} unless block_given? @db.q("PRAGMA index_list(`#{@db.esc_table(self.name)}`)") do |d_indexes| next if d_indexes[:Key_name] == "PRIMARY" obj = @indexes_list.get!(d_indexes[:name]) if !obj if @db.opts[:index_append_table_name] match_name = d_indexes[:name].match(/__(.+)$/) if match_name name = match_name[1] else name = d_indexes[:name] end else name = d_indexes[:name] end obj = KnjDB_sqlite3::Indexes::Index.new( :table_name => self.name, :db => @db, :data => d_indexes ) obj.columns << name @indexes_list[d_indexes[:name]] = obj end if block_given? yield(obj) else ret[d_indexes[:name]] = obj end end if block_given? return nil else return ret end end |
#insert(data) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 446 def insert(data) @db.insert(self.name, data) end |
#maxlength ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 114 def maxlength return @data[:maxlength] end |
#name ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 106 def name return @data[:name] end |
#native? ⇒ Boolean
Returns true if the table is safe to drop.
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 134 def native? return true if self.name.to_s == "sqlite_sequence" return false end |
#optimize ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 139 def optimize raise "stub!" end |
#reload ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 118 def reload @data = @db.select("sqlite_master", {"type" => "table", "name" => self.name}, {"orderby" => "name"}).fetch end |
#rename(newname) ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 143 def rename(newname) self.clone(newname) self.drop end |
#rows_count ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 122 def rows_count data = @db.q("SELECT COUNT(*) AS count FROM `#{self.name}`").fetch return data[:count].to_i end |
#table ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 153 def table return @db.tables[@table_name] end |
#truncate ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 148 def truncate @db.query("DELETE FROM `#{self.name}` WHERE 1=1") return nil end |
#type ⇒ Object
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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 110 def type return @data[:type] end |