gpudb::UpdateRecordsRequest< T > Struct Template Reference

A set of input parameters for updateRecordsRaw(const RawUpdateRecordsRequest&) const. More...

#include <gpudb/protocol/update_records.h>

Public Member Functions
	UpdateRecordsRequest ()
	Constructs an UpdateRecordsRequest object with default parameter values. More...
	UpdateRecordsRequest (const std::string &tableName_, const std::vector< std::string > &expressions_, const std::vector< std::map< std::string, boost::optional< std::string > > > &newValuesMaps_, const std::vector< T > &data_, const std::map< std::string, std::string > &options_)
	Constructs an UpdateRecordsRequest object with the specified parameters. More...

Public Attributes
std::string	tableName
std::vector< std::string >	expressions
std::vector< std::map< std::string, boost::optional< std::string > > >	newValuesMaps
std::vector< T >	data
std::map< std::string, std::string >	options

Detailed Description

template<typename T>
struct gpudb::UpdateRecordsRequest< T >

A set of input parameters for updateRecordsRaw(const RawUpdateRecordsRequest&) const.

Runs multiple predicate-based updates in a single call. With the list of given expressions, any matching record's column values will be updated as provided in newValuesMaps. There is also an optional 'upsert' capability where if a particular predicate doesn't match any existing record, then a new record can be inserted.

Note that this operation can only be run on an original table and not on a collection or a result view.

This operation can update primary key values. By default only 'pure primary key' predicates are allowed when updating primary key values. If the primary key for a table is the column 'attr1', then the operation will only accept predicates of the form: "attr1 == 'foo'" if the attr1 column is being updated. For a composite primary key (e.g. columns 'attr1' and 'attr2') then this operation will only accept predicates of the form: "(attr1 == 'foo') and (attr2 == 'bar')". Meaning, all primary key columns must appear in an equality predicate in the expressions. Furthermore each 'pure primary key' predicate must be unique within a given request. These restrictions can be removed by utilizing some available options through options.

Parameters

<T>	The type of object being processed.

Definition at line 369 of file update_records.h.

Constructor & Destructor Documentation

UpdateRecordsRequest() [1/2]

template<typename T >

gpudb::UpdateRecordsRequest< T >::UpdateRecordsRequest ( )

inline

Constructs an UpdateRecordsRequest object with default parameter values.

Definition at line 376 of file update_records.h.

UpdateRecordsRequest() [2/2]

template<typename T >

gpudb::UpdateRecordsRequest< T >::UpdateRecordsRequest ( const std::string &  tableName_, const std::vector< std::string > &  expressions_, const std::vector< std::map< std::string, boost::optional< std::string > > > &  newValuesMaps_, const std::vector< T > &  data_, const std::map< std::string, std::string > &  options_  )

inline

Constructs an UpdateRecordsRequest object with the specified parameters.

Parameters

[in]	tableName_	Table to be updated. Must be a currently existing table and not a collection or view.
[in]	expressions_	A list of the actual predicates, one for each update; format should follow the guidelines /filter.
[in]	newValuesMaps_	List of new values for the matching records. Each element is a map with (key, value) pairs where the keys are the names of the columns whose values are to be updated; the values are the new values. The number of elements in the list should match the length of expressions.
[in]	data_	An optional list of new binary-avro encoded records to insert, one for each update. If one of expressions does not yield a matching record to be updated, then the corresponding element from this list will be added to the table.
[in]	options_	Optional parameters. gpudb::update_records_global_expression: An optional global expression to reduce the search space of the predicates listed in expressions. The default value is ''. gpudb::update_records_bypass_safety_checks: When set to true, all predicates are available for primary key updates. Keep in mind that it is possible to destroy data in this case, since a single predicate may match multiple objects (potentially all of records of a table), and then updating all of those records to have the same primary key will, due to the primary key uniqueness constraints, effectively delete all but one of those updated records. gpudb::update_records_true gpudb::update_records_false The default value is gpudb::update_records_false. gpudb::update_records_update_on_existing_pk: Can be used to customize behavior when the updated primary key value already exists as described in /insert/records. gpudb::update_records_true gpudb::update_records_false The default value is gpudb::update_records_false. gpudb::update_records_use_expressions_in_new_values_maps: When set to true, all new values in newValuesMaps are considered as expression values. When set to false, all new values in newValuesMaps are considered as constants. NOTE: When true, string constants will need to be quoted to avoid being evaluated as expressions. gpudb::update_records_true gpudb::update_records_false The default value is gpudb::update_records_false. gpudb::update_records_record_id: ID of a single record to be updated (returned in the call to /insert/records or /get/records/fromcollection).

Definition at line 465 of file update_records.h.

Member Data Documentation

data

template<typename T >

std::vector<T> gpudb::UpdateRecordsRequest< T >::data

Definition at line 477 of file update_records.h.

expressions

template<typename T >

std::vector<std::string> gpudb::UpdateRecordsRequest< T >::expressions

Definition at line 475 of file update_records.h.

newValuesMaps

template<typename T >

std::vector<std::map<std::string, boost::optional<std::string> > > gpudb::UpdateRecordsRequest< T >::newValuesMaps

Definition at line 476 of file update_records.h.

options

template<typename T >

std::map<std::string, std::string> gpudb::UpdateRecordsRequest< T >::options

Definition at line 478 of file update_records.h.

tableName

template<typename T >

std::string gpudb::UpdateRecordsRequest< T >::tableName

Definition at line 474 of file update_records.h.

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

• gpudb/protocol/update_records.h