Module Sequel::DB2::DatabaseMethods
In: lib/sequel/adapters/shared/db2.rb

Methods

Constants

AUTOINCREMENT = 'GENERATED ALWAYS AS IDENTITY'.freeze
NOT_NULL = ' NOT NULL'.freeze
NULL = ''.freeze

Public Instance methods

DB2 always uses :db2 as it‘s database type

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 18
18:       def database_type
19:         :db2
20:       end

Return the database version as a string. Don‘t rely on this, it may return an integer in the future.

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 24
24:       def db2_version
25:         return @db2_version if @db2_version
26:         @db2_version = metadata_dataset.with_sql("select service_level from sysibmadm.env_inst_info").first[:service_level]
27:       end

Use SYSCAT.INDEXES to get the indexes for the table

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 62
62:       def indexes(table, opts = {})
63:         m = output_identifier_meth
64:         indexes = {}
65:         metadata_dataset.
66:          from(:syscat__indexes).
67:          select(:indname, :uniquerule, :colnames).
68:          where(:tabname=>input_identifier_meth.call(table), :system_required=>0).
69:          each do |r|
70:           indexes[m.call(r[:indname])] = {:unique=>(r[:uniquerule]=='U'), :columns=>r[:colnames][1..-1].split('+').map{|v| m.call(v)}}
71:         end
72:         indexes
73:       end

Use SYSIBM.SYSCOLUMNS to get the information on the tables.

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 31
31:       def schema_parse_table(table, opts = {})
32:         m = output_identifier_meth(opts[:dataset])
33:         im = input_identifier_meth(opts[:dataset])
34:         metadata_dataset.with_sql("SELECT * FROM SYSIBM.SYSCOLUMNS WHERE TBNAME = #{literal(im.call(table))} ORDER BY COLNO").
35:           collect do |column| 
36:             column[:db_type]     = column.delete(:typename)
37:             if column[:db_type]  == "DECIMAL"
38:               column[:db_type] << "(#{column[:longlength]},#{column[:scale]})"
39:             end
40:             column[:allow_null]  = column.delete(:nulls) == 'Y'
41:             column[:primary_key] = column.delete(:identity) == 'Y' || !column[:keyseq].nil?
42:             column[:type]        = schema_column_type(column[:db_type])
43:             [ m.call(column.delete(:name)), column]
44:           end
45:       end
server_version()

Alias for db2_version

Use SYSCAT.TABLES to get the tables for the database

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 48
48:       def tables
49:         metadata_dataset.
50:           with_sql("SELECT TABNAME FROM SYSCAT.TABLES WHERE TYPE='T' AND OWNER = #{literal(input_identifier_meth.call(opts[:user]))}").
51:           all.map{|h| output_identifier_meth.call(h[:tabname]) }
52:       end

Use SYSCAT.TABLES to get the views for the database

[Source]

    # File lib/sequel/adapters/shared/db2.rb, line 55
55:       def views
56:         metadata_dataset.
57:           with_sql("SELECT TABNAME FROM SYSCAT.TABLES WHERE TYPE='V' AND OWNER = #{literal(input_identifier_meth.call(opts[:user]))}").
58:           all.map{|h| output_identifier_meth.call(h[:tabname]) }
59:       end

[Validate]