gpudb::CreateUnionRequest Struct Reference

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

#include <gpudb/protocol/create_union.h>

Public Member Functions
	CreateUnionRequest ()
	Constructs a CreateUnionRequest object with default parameter values. More...
	CreateUnionRequest (const std::string &tableName_, const std::vector< std::string > &tableNames_, const std::vector< std::vector< std::string > > &inputColumnNames_, const std::vector< std::string > &outputColumnNames_, const std::map< std::string, std::string > &options_)
	Constructs a CreateUnionRequest object with the specified parameters. More...

Public Attributes
std::string	tableName
std::vector< std::string >	tableNames
std::vector< std::vector < std::string > >	inputColumnNames
std::vector< std::string >	outputColumnNames
std::map< std::string, std::string >	options

Detailed Description

A set of input parameters for const.

Merges data from one or more tables with comparable data types into a new table.

The following merges are supported:

UNION (DISTINCT/ALL) - For data set union details and examples, see Union. For limitations, see Union Limitations and Cautions.

INTERSECT (DISTINCT/ALL) - For data set intersection details and examples, see Intersect. For limitations, see Intersect Limitations.

EXCEPT (DISTINCT/ALL) - For data set subtraction details and examples, see Except. For limitations, see Except Limitations.

MERGE VIEWS - For a given set of filtered views on a single table, creates a single filtered view containing all of the unique records across all of the given filtered data sets.

Non-charN 'string' and 'bytes' column types cannot be merged, nor can columns marked as store-only.

Definition at line 47 of file create_union.h.

Constructor & Destructor Documentation

gpudb::CreateUnionRequest::CreateUnionRequest ( )

inline

Constructs a CreateUnionRequest object with default parameter values.

Definition at line 54 of file create_union.h.

gpudb::CreateUnionRequest::CreateUnionRequest ( const std::string &  tableName_, const std::vector< std::string > &  tableNames_, const std::vector< std::vector< std::string > > &  inputColumnNames_, const std::vector< std::string > &  outputColumnNames_, const std::map< std::string, std::string > &  options_  )

inline

Constructs a CreateUnionRequest object with the specified parameters.

Parameters

[in]	tableName_	Name of the table to be created. Has the same naming restrictions as tables.
[in]	tableNames_	The list of table names to merge. Must contain the names of one or more existing tables.
[in]	inputColumnNames_	The list of columns from each of the corresponding input tables.
[in]	outputColumnNames_	The list of names of the columns to be stored in the output table.
[in]	options_	Optional parameters. gpudb::create_union_collection_name: Name of a collection which is to contain the output table. If the collection provided is non-existent, the collection will be automatically created. If empty, the output table will be a top-level table. The default value is ''. gpudb::create_union_materialize_on_gpu: No longer used. See Resource Management Concepts for information about how resources are managed, Tier Strategy Concepts for how resources are targeted for VRAM, and Tier Strategy Usage for how to specify a table's priority in VRAM. gpudb::create_union_true gpudb::create_union_false The default value is gpudb::create_union_false. gpudb::create_union_mode: If merge_views, then this operation will merge the provided views. All tableNames must be views from the same underlying base table. gpudb::create_union_union_all: Retains all rows from the specified tables. gpudb::create_union_union: Retains all unique rows from the specified tables (synonym for union_distinct). gpudb::create_union_union_distinct: Retains all unique rows from the specified tables. gpudb::create_union_except: Retains all unique rows from the first table that do not appear in the second table (only works on 2 tables). gpudb::create_union_except_all: Retains all rows(including duplicates) from the first table that do not appear in the second table (only works on 2 tables). gpudb::create_union_intersect: Retains all unique rows that appear in both of the specified tables (only works on 2 tables). gpudb::create_union_intersect_all: Retains all rows(including duplicates) that appear in both of the specified tables (only works on 2 tables). gpudb::create_union_merge_views: Merge two or more views (or views of views) of the same base data set into a new view. If this mode is selected inputColumnNames AND outputColumnNames must be empty. The resulting view would match the results of a SQL OR operation, e.g., if filter 1 creates a view using the expression 'x = 20' and filter 2 creates a view using the expression 'x <= 10', then the merge views operation creates a new view using the expression 'x = 20 OR x <= 10'. The default value is gpudb::create_union_union_all. gpudb::create_union_chunk_size: Indicates the number of records per chunk to be used for this output table. gpudb::create_union_create_indexes: Comma-separated list of columns on which to create indexes on the output table. The columns specified must be present in outputColumnNames. gpudb::create_union_ttl: Sets the TTL of the output table specified in tableName. gpudb::create_union_persist: If true, then the output table specified in tableName will be persisted and will not expire unless a ttl is specified. If false, then the output table will be an in-memory table and will expire unless a ttl is specified otherwise. gpudb::create_union_true gpudb::create_union_false The default value is gpudb::create_union_false. gpudb::create_union_view_id: ID of view of which this output table is a member. The default value is ''. gpudb::create_union_force_replicated: If true, then the output table specified in tableName will be replicated even if the source tables are not. gpudb::create_union_true gpudb::create_union_false The default value is gpudb::create_union_false.

Definition at line 188 of file create_union.h.

Member Data Documentation

std::vector<std::vector<std::string> > gpudb::CreateUnionRequest::inputColumnNames

Definition at line 199 of file create_union.h.

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

Definition at line 201 of file create_union.h.

std::vector<std::string> gpudb::CreateUnionRequest::outputColumnNames

Definition at line 200 of file create_union.h.

std::string gpudb::CreateUnionRequest::tableName

Definition at line 197 of file create_union.h.

std::vector<std::string> gpudb::CreateUnionRequest::tableNames

Definition at line 198 of file create_union.h.

---

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

• gpudb/protocol/create_union.h