Module: ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements
- Included in:
- ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
- Defined in:
- lib/active_record/connection_adapters/postgresql/database_statements.rb
Constant Summary collapse
- MONEY_COLUMN_TYPE_OID =
The internal PostgreSQL identifier of the money data type.
790
- BYTEA_COLUMN_TYPE_OID =
The internal PostgreSQL identifier of the BYTEA data type.
17
Instance Method Summary collapse
-
#begin_db_transaction ⇒ Object
Begins a transaction.
- #begin_isolated_db_transaction(isolation) ⇒ Object
-
#commit_db_transaction ⇒ Object
Commits a transaction.
- #exec_delete(sql, name = nil, binds = []) ⇒ Object (also: #exec_update)
- #exec_insert(sql, name = nil, binds = [], pk = nil, sequence_name = nil) ⇒ Object
- #exec_query(sql, name = "SQL", binds = [], prepare: false) ⇒ Object
-
#exec_rollback_db_transaction ⇒ Object
Aborts a transaction.
-
#execute(sql, name = nil) ⇒ Object
Executes an SQL statement, returning a PG::Result object on success or raising a PG::Error exception otherwise.
- #explain(arel, binds = []) ⇒ Object
-
#query(sql, name = nil) ⇒ Object
Queries the database and returns the results in an Array-like object.
-
#result_as_array(res) ⇒ Object
create a 2D array representing the result set.
Instance Method Details
#begin_db_transaction ⇒ Object
Begins a transaction.
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 130 def begin_db_transaction execute "BEGIN" end |
#begin_isolated_db_transaction(isolation) ⇒ Object
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 134 def begin_isolated_db_transaction(isolation) begin_db_transaction execute "SET TRANSACTION ISOLATION LEVEL #{transaction_isolation_levels.fetch(isolation)}" end |
#commit_db_transaction ⇒ Object
Commits a transaction.
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 140 def commit_db_transaction execute "COMMIT" end |
#exec_delete(sql, name = nil, binds = []) ⇒ Object Also known as: exec_update
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 91 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) ⇒ Object
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 111 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) ⇒ Object
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 78 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 ⇒ Object
Aborts a transaction.
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 145 def exec_rollback_db_transaction execute "ROLLBACK" end |
#execute(sql, name = nil) ⇒ Object
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.
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 70 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 = []) ⇒ Object
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 5 def explain(arel, binds = []) sql = "EXPLAIN #{to_sql(arel, binds)}" PostgreSQL::ExplainPrettyPrinter.new.pp(exec_query(sql, "EXPLAIN", binds)) end |
#query(sql, name = nil) ⇒ Object
Queries the database and returns the results in an Array-like object
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 58 def query(sql, name = nil) #:nodoc: log(sql, name) do ActiveSupport::Dependencies.interlock.permit_concurrent_loads do result_as_array @connection.async_exec(sql) end end end |
#result_as_array(res) ⇒ Object
create a 2D array representing the result set
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# File 'lib/active_record/connection_adapters/postgresql/database_statements.rb', line 16 def result_as_array(res) #:nodoc: # check if we have any binary column and if they need escaping ftypes = Array.new(res.nfields) do |i| [i, res.ftype(i)] end rows = res.values return rows unless ftypes.any? { |_, x| x == BYTEA_COLUMN_TYPE_OID || x == MONEY_COLUMN_TYPE_OID } typehash = ftypes.group_by { |_, type| type } binaries = typehash[BYTEA_COLUMN_TYPE_OID] || [] monies = typehash[MONEY_COLUMN_TYPE_OID] || [] rows.each do |row| # unescape string passed BYTEA field (OID == 17) binaries.each do |index, _| row[index] = unescape_bytea(row[index]) end # If this is a money type column and there are any currency symbols, # then strip them off. Indeed it would be prettier to do this in # PostgreSQLColumn.string_to_decimal but would break form input # fields that call value_before_type_cast. monies.each do |index, _| data = row[index] # Because money output is formatted according to the locale, there are two # cases to consider (note the decimal separators): # (1) $12,345,678.12 # (2) $12.345.678,12 case data when /^-?\D+[\d,]+\.\d{2}$/ # (1) data.gsub!(/[^-\d.]/, "") when /^-?\D+[\d.]+,\d{2}$/ # (2) data.gsub!(/[^-\d,]/, "").sub!(/,/, ".") end end end end |