com.gpudb.protocol

Class CreateUnionRequest

java.lang.Object

com.gpudb.protocol.CreateUnionRequest

All Implemented Interfaces:

org.apache.avro.generic.GenericContainer, org.apache.avro.generic.IndexedRecord

public class CreateUnionRequest
extends Object
implements org.apache.avro.generic.IndexedRecord

A set of parameters for GPUdb.createUnion(CreateUnionRequest).

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.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CreateUnionRequest.Options Optional parameters.

Constructor Summary

Constructors

Constructor and Description
CreateUnionRequest() Constructs a CreateUnionRequest object with default parameters.
CreateUnionRequest(String tableName, List<String> tableNames, List<List<String>> inputColumnNames, List<String> outputColumnNames, Map<String,String> options) Constructs a CreateUnionRequest object with the specified parameters.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
Object	get(int index) This method supports the Avro framework and is not intended to be called directly by the user.
static org.apache.avro.Schema	getClassSchema() This method supports the Avro framework and is not intended to be called directly by the user.
List<List<String>>	getInputColumnNames()
Map<String,String>	getOptions()
List<String>	getOutputColumnNames()
org.apache.avro.Schema	getSchema() This method supports the Avro framework and is not intended to be called directly by the user.
String	getTableName()
List<String>	getTableNames()
int	hashCode()
void	put(int index, Object value) This method supports the Avro framework and is not intended to be called directly by the user.
CreateUnionRequest	setInputColumnNames(List<List<String>> inputColumnNames)
CreateUnionRequest	setOptions(Map<String,String> options)
CreateUnionRequest	setOutputColumnNames(List<String> outputColumnNames)
CreateUnionRequest	setTableName(String tableName)
CreateUnionRequest	setTableNames(List<String> tableNames)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CreateUnionRequest

public CreateUnionRequest()

Constructs a CreateUnionRequest object with default parameters.

CreateUnionRequest

public CreateUnionRequest(String tableName,
                          List<String> tableNames,
                          List<List<String>> inputColumnNames,
                          List<String> outputColumnNames,
                          Map<String,String> options)

Constructs a CreateUnionRequest object with the specified parameters.

Parameters:

tableName - Name of the table to be created, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria.

tableNames - The list of table names to merge, in [schema_name.]table_name format, using standard name resolution rules. Must contain the names of one or more existing tables.

inputColumnNames - The list of columns from each of the corresponding input tables.

outputColumnNames - The list of names of the columns to be stored in the output table.

options - Optional parameters.

• CREATE_TEMP_TABLE: If true, a unique temporary table name will be generated in the sys_temp schema and used in place of tableName. If persist is false (or unspecified), then this is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the projection as part of tableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of the schema for the output table. If the schema provided is non-existent, it will be automatically created. The default value is ''.
• MODE: If merge_views, then this operation will merge the provided views. All tableNames must be views from the same underlying base table. Supported values:
  • UNION_ALL: Retains all rows from the specified tables.
  • UNION: Retains all unique rows from the specified tables (synonym for union_distinct).
  • UNION_DISTINCT: Retains all unique rows from the specified tables.
  • EXCEPT: Retains all unique rows from the first table that do not appear in the second table (only works on 2 tables).
  • EXCEPT_ALL: Retains all rows(including duplicates) from the first table that do not appear in the second table (only works on 2 tables).
  • INTERSECT: Retains all unique rows that appear in both of the specified tables (only works on 2 tables).
  • INTERSECT_ALL: Retains all rows(including duplicates) that appear in both of the specified tables (only works on 2 tables).
  • 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 UNION_ALL.
• CHUNK_SIZE: Indicates the number of records per chunk to be used for this output table.
• CREATE_INDEXES: Comma-separated list of columns on which to create indexes on the output table. The columns specified must be present in outputColumnNames.
• TTL: Sets the TTL of the output table specified in tableName.
• 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. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• VIEW_ID: ID of view of which this output table is a member. The default value is ''.
• FORCE_REPLICATED: If true, then the output table specified in tableName will be replicated even if the source tables are not. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.

The default value is an empty Map.

Method Detail

getClassSchema

public static org.apache.avro.Schema getClassSchema()

This method supports the Avro framework and is not intended to be called directly by the user.

Returns:

the schema for the class.

getTableName

public String getTableName()

Returns:

Name of the table to be created, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria.

setTableName

public CreateUnionRequest setTableName(String tableName)

Parameters:

tableName - Name of the table to be created, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria.

Returns:

this to mimic the builder pattern.

getTableNames

public List<String> getTableNames()

Returns:

The list of table names to merge, in [schema_name.]table_name format, using standard name resolution rules. Must contain the names of one or more existing tables.

setTableNames

public CreateUnionRequest setTableNames(List<String> tableNames)

Parameters:

tableNames - The list of table names to merge, in [schema_name.]table_name format, using standard name resolution rules. Must contain the names of one or more existing tables.

Returns:

this to mimic the builder pattern.

getInputColumnNames

public List<List<String>> getInputColumnNames()

Returns:

The list of columns from each of the corresponding input tables.

setInputColumnNames

public CreateUnionRequest setInputColumnNames(List<List<String>> inputColumnNames)

Parameters:

inputColumnNames - The list of columns from each of the corresponding input tables.

Returns:

this to mimic the builder pattern.

getOutputColumnNames

public List<String> getOutputColumnNames()

Returns:

The list of names of the columns to be stored in the output table.

setOutputColumnNames

public CreateUnionRequest setOutputColumnNames(List<String> outputColumnNames)

Parameters:

outputColumnNames - The list of names of the columns to be stored in the output table.

Returns:

this to mimic the builder pattern.

getOptions

public Map<String,String> getOptions()

Returns:

Optional parameters.

• CREATE_TEMP_TABLE: If true, a unique temporary table name will be generated in the sys_temp schema and used in place of tableName. If persist is false (or unspecified), then this is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the projection as part of tableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of the schema for the output table. If the schema provided is non-existent, it will be automatically created. The default value is ''.
• MODE: If merge_views, then this operation will merge the provided views. All tableNames must be views from the same underlying base table. Supported values:
  • UNION_ALL: Retains all rows from the specified tables.
  • UNION: Retains all unique rows from the specified tables (synonym for union_distinct).
  • UNION_DISTINCT: Retains all unique rows from the specified tables.
  • EXCEPT: Retains all unique rows from the first table that do not appear in the second table (only works on 2 tables).
  • EXCEPT_ALL: Retains all rows(including duplicates) from the first table that do not appear in the second table (only works on 2 tables).
  • INTERSECT: Retains all unique rows that appear in both of the specified tables (only works on 2 tables).
  • INTERSECT_ALL: Retains all rows(including duplicates) that appear in both of the specified tables (only works on 2 tables).
  • 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 UNION_ALL.
• CHUNK_SIZE: Indicates the number of records per chunk to be used for this output table.
• CREATE_INDEXES: Comma-separated list of columns on which to create indexes on the output table. The columns specified must be present in outputColumnNames.
• TTL: Sets the TTL of the output table specified in tableName.
• 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. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• VIEW_ID: ID of view of which this output table is a member. The default value is ''.
• FORCE_REPLICATED: If true, then the output table specified in tableName will be replicated even if the source tables are not. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.

The default value is an empty Map.

setOptions

public CreateUnionRequest setOptions(Map<String,String> options)

Parameters:

options - Optional parameters.

• CREATE_TEMP_TABLE: If true, a unique temporary table name will be generated in the sys_temp schema and used in place of tableName. If persist is false (or unspecified), then this is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the projection as part of tableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of the schema for the output table. If the schema provided is non-existent, it will be automatically created. The default value is ''.
• MODE: If merge_views, then this operation will merge the provided views. All tableNames must be views from the same underlying base table. Supported values:
  • UNION_ALL: Retains all rows from the specified tables.
  • UNION: Retains all unique rows from the specified tables (synonym for union_distinct).
  • UNION_DISTINCT: Retains all unique rows from the specified tables.
  • EXCEPT: Retains all unique rows from the first table that do not appear in the second table (only works on 2 tables).
  • EXCEPT_ALL: Retains all rows(including duplicates) from the first table that do not appear in the second table (only works on 2 tables).
  • INTERSECT: Retains all unique rows that appear in both of the specified tables (only works on 2 tables).
  • INTERSECT_ALL: Retains all rows(including duplicates) that appear in both of the specified tables (only works on 2 tables).
  • 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 UNION_ALL.
• CHUNK_SIZE: Indicates the number of records per chunk to be used for this output table.
• CREATE_INDEXES: Comma-separated list of columns on which to create indexes on the output table. The columns specified must be present in outputColumnNames.
• TTL: Sets the TTL of the output table specified in tableName.
• 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. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• VIEW_ID: ID of view of which this output table is a member. The default value is ''.
• FORCE_REPLICATED: If true, then the output table specified in tableName will be replicated even if the source tables are not. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.

The default value is an empty Map.

Returns:

this to mimic the builder pattern.

getSchema

public org.apache.avro.Schema getSchema()

This method supports the Avro framework and is not intended to be called directly by the user.

Specified by:

getSchema in interface org.apache.avro.generic.GenericContainer

Returns:

the schema object describing this class.

get

public Object get(int index)

This method supports the Avro framework and is not intended to be called directly by the user.

Specified by:

get in interface org.apache.avro.generic.IndexedRecord

Parameters:

index - the position of the field to get

Returns:

value of the field with the given index.

Throws:

IndexOutOfBoundsException

put

public void put(int index,
                Object value)

This method supports the Avro framework and is not intended to be called directly by the user.

Specified by:

put in interface org.apache.avro.generic.IndexedRecord

Parameters:

index - the position of the field to set

value - the value to set

Throws:

IndexOutOfBoundsException

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object