A set of parameters for GPUdb::alterWal. More…
#include <gpudb/protocol/alter_wal.h>
Public Member Functions | |
| AlterWalRequest () | |
| Constructs an AlterWalRequest object with default parameters. | |
| AlterWalRequest (const std::vector< std::string > &tableNames_, const std::map< std::string, std::string > &options_) | |
| Constructs an AlterWalRequest object with the specified parameters. | |
Public Attributes | |
| std::vector< std::string > | tableNames |
| List of tables to modify. | |
| std::map< std::string, std::string > | options |
| Optional parameters. | |
Detailed Description
A set of parameters for GPUdb::alterWal.
Alters table write-ahead log (WAL) settings. Returns information about the requested table WAL modifications.
Definition at line 18 of file alter_wal.h.
Constructor & Destructor Documentation
◆ AlterWalRequest() [1/2]
| inline |
Constructs an AlterWalRequest object with default parameters.
Definition at line 23 of file alter_wal.h.
◆ AlterWalRequest() [2/2]
| inline |
Constructs an AlterWalRequest object with the specified parameters.
Parameters
| [in] | tableNames_ | List of tables to modify. An asterisk changes the system settings. |
| [in] | options_ | Optional parameters.
|
Definition at line 143 of file alter_wal.h.
Member Data Documentation
◆ options
| std::map<std::string, std::string> gpudb::AlterWalRequest::options |
Optional parameters.
- alter_wal_max_segment_size: Maximum size of an individual segment file.
- alter_wal_segment_count: Approximate number of segment files to split the WAL across. Must be at least two.
- alter_wal_sync_policy: Maximum size of an individual segment file. Supported values:
- alter_wal_none: Disables the WAL.
- alter_wal_background: WAL entries are periodically written instead of immediately after each operation.
- alter_wal_flush: Protects entries in the event of a database crash.
- alter_wal_fsync: Protects entries in the event of an OS crash.
- alter_wal_flush_frequency: Specifies how frequently WAL entries are written with background sync. This is a global setting and can only be used with the system options.table_names specifier ’*’.
- alter_wal_checksum: If true each entry will be checked against a protective checksum. Supported values:The default value is alter_wal_true.
- alter_wal_override_non_default: If true tables with unique WAL settings will be overridden when applying a system level change. Supported values:The default value is alter_wal_false.
- alter_wal_restore_system_settings: If true tables with unique WAL settings will be reverted to the current global settings. Cannot be used in conjunction with any other option. Supported values:The default value is alter_wal_false.
- alter_wal_persist: If true and a system-level change was requested, the system configuration will be written to disk upon successful application of this request. This will commit the changes from this request and any additional in-memory modifications. Supported values:The default value is alter_wal_true.
The default value is an empty map.
Definition at line 231 of file alter_wal.h.
◆ tableNames
| std::vector<std::string> gpudb::AlterWalRequest::tableNames |
List of tables to modify.
An asterisk changes the system settings.
Definition at line 152 of file alter_wal.h.
The documentation for this struct was generated from the following file:
- gpudb/protocol/alter_wal.h