Module: ActiveRecord::ConnectionAdapters::OracleEnhancedStructureDump

Defined in:
lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb

Overview

:nodoc:

Constant Summary collapse

STATEMENT_TOKEN =

Statements separator used in structure dump to allow loading of structure dump also with SQL*Plus

"\n\n/\n\n"

Instance Method Summary collapse

Instance Method Details

#add_column_options!(sql, options) ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 217

def add_column_options!(sql, options) #:nodoc:
  type = options[:type] || ((column = options[:column]) && column.type)
  type = type && type.to_sym
  # handle case of defaults for CLOB columns, which would otherwise get "quoted" incorrectly
  if options_include_default?(options)
    if type == :text
      sql << " DEFAULT #{quote(options[:default])}"
    else
      # from abstract adapter
      sql << " DEFAULT #{quote(options[:default], options[:column])}"
    end
  end
  # must explicitly add NULL or NOT NULL to allow change_column to work on migrations
  if options[:null] == false
    sql << " NOT NULL"
  elsif options[:null] == true
    sql << " NULL" unless type == :primary_key
  end
  # add AS expression for virtual columns
  if options[:as].present?
    sql << " AS (#{options[:as]})"
  end
end

#dump_schema_information ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 137

def dump_schema_information #:nodoc:
  sm_table = ActiveRecord::Migrator.schema_migrations_table_name
  migrated = select_values("SELECT version FROM #{sm_table} ORDER BY version")
  join_with_statement_token(migrated.map{|v| "INSERT INTO #{sm_table} (version) VALUES ('#{v}')" })
end

#execute_structure_dump(string) ⇒ Object 



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 241

def execute_structure_dump(string)
  string.split(STATEMENT_TOKEN).each do |ddl|
    execute(ddl) unless ddl.blank?
  end
end

#full_drop(preserve_tables = false) ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 204

def full_drop(preserve_tables=false) #:nodoc:
  s = preserve_tables ? [] : [structure_drop]
  s << temp_table_drop if preserve_tables
  s << drop_sql_for_feature("view")
  s << drop_sql_for_feature("materialized view")
  s << drop_sql_for_feature("synonym")
  s << drop_sql_for_feature("type")
  s << drop_sql_for_object("package")
  s << drop_sql_for_object("function")
  s << drop_sql_for_object("procedure")
  s.join
end

#structure_drop ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 182

def structure_drop #:nodoc:
  statements = select_values("SELECT sequence_name FROM user_sequences ORDER BY 1").map do |seq|
    "DROP SEQUENCE \"#{seq}\""
  end
  select_values("SELECT table_name from all_tables t
              WHERE owner = SYS_CONTEXT('userenv', 'current_schema') AND secondary = 'N'
                AND NOT EXISTS (SELECT mv.mview_name FROM all_mviews mv WHERE mv.owner = t.owner AND mv.mview_name = t.table_name)
                AND NOT EXISTS (SELECT mvl.log_table FROM all_mview_logs mvl WHERE mvl.log_owner = t.owner AND mvl.log_table = t.table_name)
              ORDER BY 1").each do |table|
    statements << "DROP TABLE \"#{table}\" CASCADE CONSTRAINTS"
  end
  join_with_statement_token(statements)
end

#structure_dump ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 8

def structure_dump #:nodoc:
  structure = select_values("SELECT sequence_name FROM user_sequences ORDER BY 1").map do |seq|
    "CREATE SEQUENCE \"#{seq}\""
  end
  select_values("SELECT table_name FROM all_tables t
              WHERE owner = SYS_CONTEXT('userenv', 'current_schema') AND secondary = 'N'
                AND NOT EXISTS (SELECT mv.mview_name FROM all_mviews mv WHERE mv.owner = t.owner AND mv.mview_name = t.table_name)
                AND NOT EXISTS (SELECT mvl.log_table FROM all_mview_logs mvl WHERE mvl.log_owner = t.owner AND mvl.log_table = t.table_name)
              ORDER BY 1").each do |table_name|
    virtual_columns = virtual_columns_for(table_name)
    ddl = "CREATE#{ ' GLOBAL TEMPORARY' if temporary_table?(table_name)} TABLE \"#{table_name}\" (\n"
    cols = select_all(%Q{
      SELECT column_name, data_type, data_length, char_used, char_length, data_precision, data_scale, data_default, nullable
      FROM user_tab_columns
      WHERE table_name = '#{table_name}'
      ORDER BY column_id
    }).map do |row|
      if(v = virtual_columns.find {|col| col['column_name'] == row['column_name']})
        structure_dump_virtual_column(row, v['data_default'])
      else
        structure_dump_column(row)
      end
    end
    ddl << cols.join(",\n ")
    ddl << structure_dump_primary_key(table_name)
    ddl << "\n)"
    structure << ddl
    structure << structure_dump_indexes(table_name)
    structure << structure_dump_unique_keys(table_name)
  end

  join_with_statement_token(structure) << structure_dump_fk_constraints
end

#structure_dump_column(column) ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 42

def structure_dump_column(column) #:nodoc:
  col = "\"#{column['column_name']}\" #{column['data_type']}"
  if column['data_type'] =='NUMBER' and !column['data_precision'].nil?
    col << "(#{column['data_precision'].to_i}"
    col << ",#{column['data_scale'].to_i}" if !column['data_scale'].nil?
    col << ')'
  elsif column['data_type'].include?('CHAR') || column['data_type'] == 'RAW'
    length = column['char_used'] == 'C' ? column['char_length'].to_i : column['data_length'].to_i
    col <<  "(#{length})"
  end
  col << " DEFAULT #{column['data_default']}" if !column['data_default'].nil?
  col << ' NOT NULL' if column['nullable'] == 'N'
  col
end

#structure_dump_db_stored_code ⇒ Object

Extract all stored procedures, packages, synonyms and views.



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 144

def structure_dump_db_stored_code #:nodoc:
  structure = []
  select_all("SELECT DISTINCT name, type
               FROM all_source
              WHERE type IN ('PROCEDURE', 'PACKAGE', 'PACKAGE BODY', 'FUNCTION', 'TRIGGER', 'TYPE')
                AND name NOT LIKE 'BIN$%'
                AND owner = SYS_CONTEXT('userenv', 'current_schema') ORDER BY type").each do |source|
    ddl = "CREATE OR REPLACE   \n"
    select_all(%Q{
            SELECT text
              FROM all_source
             WHERE name = '#{source['name']}'
               AND type = '#{source['type']}'
               AND owner = SYS_CONTEXT('userenv', 'current_schema')
             ORDER BY line
          }).each do |row|
      ddl << row['text']
    end
    ddl << ";" unless ddl.strip[-1,1] == ';'
    structure << ddl
  end

  # export views 
  select_all("SELECT view_name, text FROM user_views ORDER BY view_name ASC").each do |view|
    structure << "CREATE OR REPLACE FORCE VIEW #{view['view_name']} AS\n #{view['text']}"
  end

  # export synonyms
  select_all("SELECT owner, synonym_name, table_name, table_owner
                FROM all_synonyms
               WHERE owner = SYS_CONTEXT('userenv', 'current_schema') ").each do |synonym|
    structure << "CREATE OR REPLACE #{synonym['owner'] == 'PUBLIC' ? 'PUBLIC' : '' } SYNONYM #{synonym['synonym_name']}"
    structure << " FOR #{synonym['table_owner']}.#{synonym['table_name']}"
  end

  join_with_statement_token(structure)
end

#structure_dump_fk_constraints ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 125

def structure_dump_fk_constraints #:nodoc:
  fks = select_all("SELECT table_name FROM all_tables WHERE owner = SYS_CONTEXT('userenv', 'current_schema') ORDER BY 1").map do |table|
    if respond_to?(:foreign_keys) && (foreign_keys = foreign_keys(table["table_name"])).any?
      foreign_keys.map do |fk|
        sql = "ALTER TABLE #{quote_table_name(fk.from_table)} ADD CONSTRAINT #{quote_column_name(fk.options[:name])} "
        sql << "#{foreign_key_definition(fk.to_table, fk.options)}"
      end
    end
  end.flatten.compact
  join_with_statement_token(fks)
end

#structure_dump_indexes(table_name) ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 109

def structure_dump_indexes(table_name) #:nodoc:
  indexes(table_name).map do |options|
    column_names = options[:columns]
    options = {:name => options[:name], :unique => options[:unique]}
    index_name   = index_name(table_name, :column => column_names)
    if Hash === options # legacy support, since this param was a string
      index_type = options[:unique] ? "UNIQUE" : ""
      index_name = options[:name] || index_name
    else
      index_type = options
    end
    quoted_column_names = column_names.map { |e| quote_column_name_or_expression(e) }.join(", ")
    "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} (#{quoted_column_names})"
  end
end

#structure_dump_primary_key(table) ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 71

def structure_dump_primary_key(table) #:nodoc:
  opts = {:name => '', :cols => []}
  pks = select_all(<<-SQL, "Primary Keys") 
    SELECT a.constraint_name, a.column_name, a.position
      FROM user_cons_columns a
      JOIN user_constraints c
        ON a.constraint_name = c.constraint_name
     WHERE c.table_name = '#{table.upcase}'
       AND c.constraint_type = 'P'
       AND c.owner = SYS_CONTEXT('userenv', 'current_schema')
  SQL
  pks.each do |row|
    opts[:name] = row['constraint_name']
    opts[:cols][row['position']-1] = row['column_name']
  end
  opts[:cols].length > 0 ? ",\n CONSTRAINT #{opts[:name]} PRIMARY KEY (#{opts[:cols].join(',')})" : ''
end

#structure_dump_unique_keys(table) ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 89

def structure_dump_unique_keys(table) #:nodoc:
  keys = {}
  uks = select_all(<<-SQL, "Primary Keys") 
    SELECT a.constraint_name, a.column_name, a.position
      FROM user_cons_columns a
      JOIN user_constraints c
        ON a.constraint_name = c.constraint_name
     WHERE c.table_name = '#{table.upcase}'
       AND c.constraint_type = 'U'
       AND c.owner = SYS_CONTEXT('userenv', 'current_schema')
  SQL
  uks.each do |uk|
    keys[uk['constraint_name']] ||= []
    keys[uk['constraint_name']][uk['position']-1] = uk['column_name']
  end
  keys.map do |k,v|
    "ALTER TABLE #{table.upcase} ADD CONSTRAINT #{k} UNIQUE (#{v.join(',')})"
  end
end

#structure_dump_virtual_column(column, data_default) ⇒ Object

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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 57

def structure_dump_virtual_column(column, data_default) #:nodoc:
  data_default = data_default.gsub(/"/, '')
  col = "\"#{column['column_name']}\" #{column['data_type']}"
  if column['data_type'] =='NUMBER' and !column['data_precision'].nil?
    col << "(#{column['data_precision'].to_i}"
    col << ",#{column['data_scale'].to_i}" if !column['data_scale'].nil?
    col << ')'
  elsif column['data_type'].include?('CHAR') || column['data_type'] == 'RAW'
    length = column['char_used'] == 'C' ? column['char_length'].to_i : column['data_length'].to_i
    col <<  "(#{length})"
  end
  col << " GENERATED ALWAYS AS (#{data_default}) VIRTUAL"
end

#temp_table_drop ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/oracle_enhanced_structure_dump.rb', line 196

def temp_table_drop #:nodoc:
  join_with_statement_token(select_values(
            "SELECT table_name FROM all_tables
              WHERE owner = SYS_CONTEXT('userenv', 'current_schema') AND secondary = 'N' AND temporary = 'Y' ORDER BY 1").map do |table|
    "DROP TABLE \"#{table}\" CASCADE CONSTRAINTS"
  end)
end