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Methods
B
C
E
Constants
MONEY_COLUMN_TYPE_OID = 790
 

The internal PostgreSQL identifier of the money data type.

BYTEA_COLUMN_TYPE_OID = 17
 

The internal PostgreSQL identifier of the BYTEA data type.

Instance Public methods
begin_db_transaction()

Begins a transaction.

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 132
def begin_db_transaction
  execute "BEGIN"
end
begin_isolated_db_transaction(isolation)
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 136
def begin_isolated_db_transaction(isolation)
  begin_db_transaction
  execute "SET TRANSACTION ISOLATION LEVEL #{transaction_isolation_levels.fetch(isolation)}"
end
commit_db_transaction()

Commits a transaction.

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 142
def commit_db_transaction
  execute "COMMIT"
end
exec_delete(sql, name = nil, binds = [])
Also aliased as: exec_update
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 93
def exec_delete(sql, name = nil, binds = [])
  execute_and_clear(sql, name, binds) { |result| result.cmd_tuples }
end
exec_insert(sql, name = nil, binds = [], pk = nil, sequence_name = nil)
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 113
def exec_insert(sql, name = nil, binds = [], pk = nil, sequence_name = nil)
  if use_insert_returning? || pk == false
    super
  else
    result = exec_query(sql, name, binds)
    unless sequence_name
      table_ref = extract_table_ref_from_insert_sql(sql)
      if table_ref
        pk = primary_key(table_ref) if pk.nil?
        pk = suppress_composite_primary_key(pk)
        sequence_name = default_sequence_name(table_ref, pk)
      end
      return result unless sequence_name
    end
    last_insert_id_result(sequence_name)
  end
end
exec_query(sql, name = "SQL", binds = [], prepare: false)
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 80
def exec_query(sql, name = "SQL", binds = [], prepare: false)
  execute_and_clear(sql, name, binds, prepare: prepare) do |result|
    types = {}
    fields = result.fields
    fields.each_with_index do |fname, i|
      ftype = result.ftype i
      fmod  = result.fmod i
      types[fname] = get_oid_type(ftype, fmod, fname)
    end
    ActiveRecord::Result.new(fields, result.values, types)
  end
end
exec_rollback_db_transaction()

Aborts a transaction.

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 147
def exec_rollback_db_transaction
  execute "ROLLBACK"
end
exec_update(sql, name = nil, binds = [])
Alias for: exec_delete
execute(sql, name = nil)

Executes an SQL statement, returning a PG::Result object on success or raising a PG::Error exception otherwise. Note: the PG::Result object is manually memory managed; if you don't need it specifically, you may want consider the exec_query wrapper.

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 72
def execute(sql, name = nil)
  log(sql, name) do
    ActiveSupport::Dependencies.interlock.permit_concurrent_loads do
      @connection.async_exec(sql)
    end
  end
end
explain(arel, binds = [])
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 6
def explain(arel, binds = [])
  sql, binds = to_sql(arel, binds)
  sql = "EXPLAIN #{sql}"
  PostgreSQL::ExplainPrettyPrinter.new.pp(exec_query(sql, "EXPLAIN", binds))
end