gpudb::AlterTableRequest Struct Reference

A set of input parameters for const. More...

#include <gpudb/protocol/alter_table.h>

Public Member Functions
	AlterTableRequest ()
	Constructs an AlterTableRequest object with default parameter values. More...
	AlterTableRequest (const std::string &tableName_, const std::string &action_, const std::string &value_, const std::map< std::string, std::string > &options_)
	Constructs an AlterTableRequest object with the specified parameters. More...

Public Attributes
std::string	tableName
std::string	action
std::string	value
std::map< std::string, std::string >	options

Detailed Description

A set of input parameters for const.

Apply various modifications to a table, view, or collection. The available modifications include the following:

Manage a table's columns–a column can be added, removed, or have its type and properties modified, including whether it is compressed or not.

Create or delete an index on a particular column. This can speed up certain operations when using expressions containing equality or relational operators on indexed columns. This only applies to tables.

Create or delete a foreign key on a particular column.

Manage a range-partitioned or a manual list-partitioned table's partitions.

Set (or reset) the tier strategy of a table or view.

Refresh and manage the refresh mode of a materialized view.

Set the time-to-live (TTL). This can be applied to tables, views, or collections. When applied to collections, every contained table & view that is not protected will have its TTL set to the given value.

Set the global access mode (i.e. locking) for a table. This setting trumps any role-based access controls that may be in place; e.g., a user with write access to a table marked read-only will not be able to insert records into it. The mode can be set to read-only, write-only, read/write, and no access.

Change the protection mode to prevent or allow automatic expiration. This can be applied to tables, views, and collections.

Definition at line 72 of file alter_table.h.

Constructor & Destructor Documentation

gpudb::AlterTableRequest::AlterTableRequest ( )

inline

Constructs an AlterTableRequest object with default parameter values.

Definition at line 79 of file alter_table.h.

gpudb::AlterTableRequest::AlterTableRequest ( const std::string &  tableName_, const std::string &  action_, const std::string &  value_, const std::map< std::string, std::string > &  options_  )

inline

Constructs an AlterTableRequest object with the specified parameters.

Parameters

[in]	tableName_	Table on which the operation will be performed. Must be an existing table, view, or collection.
[in]	action_	Modification operation to be applied gpudb::alter_table_allow_homogeneous_tables: No longer supported; action will be ignored. gpudb::alter_table_create_index: Creates either a column (attribute) index or chunk skip index, depending on the specified index_type, on the column name specified in value. If this column already has the specified index, an error will be returned. gpudb::alter_table_delete_index: Deletes either a column (attribute) index or chunk skip index, depending on the specified index_type, on the column name specified in value. If this column does not have the specified index, an error will be returned. gpudb::alter_table_move_to_collection: Moves a table or view into a collection named value. If the collection provided is non-existent, the collection will be automatically created. If value is empty, then the table or view will be top-level. gpudb::alter_table_protected: Sets whether the given tableName should be protected or not. The value must be either 'true' or 'false'. gpudb::alter_table_rename_table: Renames a table, view or collection to value. Has the same naming restrictions as tables. gpudb::alter_table_ttl: Sets the time-to-live in minutes of the table, view, or collection specified in tableName. gpudb::alter_table_add_column: Adds the column specified in value to the table specified in tableName. Use column_type and column_properties in options to set the column's type and properties, respectively. gpudb::alter_table_change_column: Changes type and properties of the column specified in value. Use column_type and column_properties in options to set the column's type and properties, respectively. Note that primary key and/or shard key columns cannot be changed. All unchanging column properties must be listed for the change to take place, e.g., to add dictionary encoding to an existing 'char4' column, both 'char4' and 'dict' must be specified in the options map. gpudb::alter_table_set_column_compression: Modifies the compression setting on the column specified in value to the compression type specified in compression_type. gpudb::alter_table_delete_column: Deletes the column specified in value from the table specified in tableName. gpudb::alter_table_create_foreign_key: Creates a foreign key specified in value using the format '(source_column_name [, ...]) references target_table_name(primary_key_column_name [, ...]) [as foreign_key_name]'. gpudb::alter_table_delete_foreign_key: Deletes a foreign key. The value should be the foreign_key_name specified when creating the key or the complete string used to define it. gpudb::alter_table_add_partition: Adds the partition specified in value, to either a range-partitioned or manual list-partitioned table. gpudb::alter_table_remove_partition: Removes the partition specified in value (and relocates all of its data to the default partition) from either a range-partitioned or manual list-partitioned table. gpudb::alter_table_delete_partition: Deletes the partition specified in value (and all of its data) from either a range-partitioned or manual list-partitioned table. gpudb::alter_table_set_global_access_mode: Sets the global access mode (i.e. locking) for the table specified in tableName. Specify the access mode in value. Valid modes are 'no_access', 'read_only', 'write_only' and 'read_write'. gpudb::alter_table_refresh: Replays all the table creation commands required to create this materialized view. gpudb::alter_table_set_refresh_method: Sets the method by which this materialized view is refreshed to the method specified in value - one of 'manual', 'periodic', 'on_change'. gpudb::alter_table_set_refresh_start_time: Sets the time to start periodic refreshes of this materialized view to the datetime string specified in value with format 'YYYY-MM-DD HH:MM:SS'. Subsequent refreshes occur at the specified time + N * the refresh period. gpudb::alter_table_set_refresh_period: Sets the time interval in seconds at which to refresh this materialized view to the value specified in value. Also, sets the refresh method to periodic if not already set. gpudb::alter_table_remove_text_search_attributes: Removes text search attribute from all columns. gpudb::alter_table_set_strategy_definition: Sets the tier strategy for the table and its columns to the one specified in value, replacing the existing tier strategy in its entirety. See tier strategy usage for format and tier strategy examples for examples.
[in]	value_	The value of the modification, depending on action. For example, if action is add_column, this would be the column name; while the column's definition would be covered by the column_type, column_properties, column_default_value, and add_column_expression in options. If action is ttl, it would be the number of minutes for the new TTL. If action is refresh, this field would be blank.
[in]	options_	Optional parameters. gpudb::alter_table_action gpudb::alter_table_column_name gpudb::alter_table_table_name gpudb::alter_table_column_default_value: When adding a column, set a default value for existing records. For nullable columns, the default value will be null, regardless of data type. gpudb::alter_table_column_properties: When adding or changing a column, set the column properties (strings, separated by a comma: data, store_only, text_search, char8, int8 etc). gpudb::alter_table_column_type: When adding or changing a column, set the column type (strings, separated by a comma: int, double, string, null etc). gpudb::alter_table_compression_type: When setting column compression (set_column_compression for action), compression type to use: none (to use no compression) or a valid compression type. gpudb::alter_table_none gpudb::alter_table_snappy gpudb::alter_table_lz4 gpudb::alter_table_lz4hc The default value is gpudb::alter_table_snappy. gpudb::alter_table_copy_values_from_column: Deprecated. Please use add_column_expression instead. gpudb::alter_table_rename_column: When changing a column, specify new column name. gpudb::alter_table_validate_change_column: When changing a column, validate the change before applying it. If true, then validate all values. A value too large (or too long) for the new type will prevent any change. If false, then when a value is too large or long, it will be truncated. gpudb::alter_table_true: true gpudb::alter_table_false: false The default value is gpudb::alter_table_true. gpudb::alter_table_update_last_access_time: Indicates whether the time-to-live (TTL) expiration countdown timer should be reset to the table's TTL. gpudb::alter_table_true: Reset the expiration countdown timer to the table's configured TTL. gpudb::alter_table_false: Don't reset the timer; expiration countdown will continue from where it is, as if the table had not been accessed. The default value is gpudb::alter_table_true. gpudb::alter_table_add_column_expression: When adding a column, an optional expression to use for the new column's values. Any valid expression may be used, including one containing references to existing columns in the same table. gpudb::alter_table_strategy_definition: Optional parameter for specifying the tier strategy for the table and its columns when action is set_strategy_definition, replacing the existing tier strategy in its entirety. See tier strategy usage for format and tier strategy examples for examples. This option will be ignored if value is also specified. gpudb::alter_table_index_type: Type of index to create, when action is create_index, or to delete, when action is delete_index. gpudb::alter_table_column: Create or delete a column (attribute) index. gpudb::alter_table_chunk_skip: Create or delete a chunk skip index. The default value is gpudb::alter_table_column.

Definition at line 384 of file alter_table.h.

Member Data Documentation

std::string gpudb::AlterTableRequest::action

Definition at line 393 of file alter_table.h.

std::map<std::string, std::string> gpudb::AlterTableRequest::options

Definition at line 395 of file alter_table.h.

std::string gpudb::AlterTableRequest::tableName

Definition at line 392 of file alter_table.h.

std::string gpudb::AlterTableRequest::value

Definition at line 394 of file alter_table.h.

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The documentation for this struct was generated from the following file:

• gpudb/protocol/alter_table.h