com.gpudb.protocol

Class CreateJoinTableRequest

java.lang.Object

com.gpudb.protocol.CreateJoinTableRequest

All Implemented Interfaces:

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

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

A set of parameters for GPUdb.createJoinTable(CreateJoinTableRequest).

Creates a table that is the result of a SQL JOIN.

For join details and examples see: Joins. For limitations, see Join Limitations and Cautions.

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor and Description
CreateJoinTableRequest() Constructs a CreateJoinTableRequest object with default parameters.
CreateJoinTableRequest(String joinTableName, List<String> tableNames, List<String> columnNames, List<String> expressions, Map<String,String> options) Constructs a CreateJoinTableRequest 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<String>	getColumnNames()
List<String>	getExpressions()
String	getJoinTableName()
Map<String,String>	getOptions()
org.apache.avro.Schema	getSchema() This method supports the Avro framework and is not intended to be called directly by the user.
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.
CreateJoinTableRequest	setColumnNames(List<String> columnNames)
CreateJoinTableRequest	setExpressions(List<String> expressions)
CreateJoinTableRequest	setJoinTableName(String joinTableName)
CreateJoinTableRequest	setOptions(Map<String,String> options)
CreateJoinTableRequest	setTableNames(List<String> tableNames)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CreateJoinTableRequest

public CreateJoinTableRequest()

Constructs a CreateJoinTableRequest object with default parameters.

CreateJoinTableRequest

public CreateJoinTableRequest(String joinTableName,
                              List<String> tableNames,
                              List<String> columnNames,
                              List<String> expressions,
                              Map<String,String> options)

Constructs a CreateJoinTableRequest object with the specified parameters.

Parameters:

joinTableName - Name of the join 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 composing the join, each in [schema_name.]table_name format, using standard name resolution rules. Corresponds to a SQL statement FROM clause.

columnNames - List of member table columns or column expressions to be included in the join. Columns can be prefixed with 'table_id.column_name', where 'table_id' is the table name or alias. Columns can be aliased via the syntax 'column_name as alias'. Wild cards '*' can be used to include all columns across member tables or 'table_id.*' for all of a single table's columns. Columns and column expressions composing the join must be uniquely named or aliased--therefore, the '*' wild card cannot be used if column names aren't unique across all tables.

expressions - An optional list of expressions to combine and filter the joined tables. Corresponds to a SQL statement WHERE clause. For details see: expressions. The default value is an empty List.

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 joinTableName. This is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_join_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the join as part of joinTableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of a schema for the join. If the schema is non-existent, it will be automatically created. The default value is ''.
• MAX_QUERY_DIMENSIONS: No longer used.
• OPTIMIZE_LOOKUPS: Use more memory to speed up the joining of tables. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.
• TTL: Sets the TTL of the join table specified in joinTableName.
• VIEW_ID: view this projection is part of. The default value is ''.
• NO_COUNT: Return a count of 0 for the join table for logging and for GPUdb.showTable(ShowTableRequest); optimization needed for large overlapped equi-join stencils. The default value is 'false'.
• CHUNK_SIZE: Maximum number of records per joined-chunk for this table. Defaults to the gpudb.conf file chunk size

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.

getJoinTableName

public String getJoinTableName()

Returns:

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

setJoinTableName

public CreateJoinTableRequest setJoinTableName(String joinTableName)

Parameters:

joinTableName - Name of the join 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 composing the join, each in [schema_name.]table_name format, using standard name resolution rules. Corresponds to a SQL statement FROM clause.

setTableNames

public CreateJoinTableRequest setTableNames(List<String> tableNames)

Parameters:

tableNames - The list of table names composing the join, each in [schema_name.]table_name format, using standard name resolution rules. Corresponds to a SQL statement FROM clause.

Returns:

this to mimic the builder pattern.

getColumnNames

public List<String> getColumnNames()

Returns:

List of member table columns or column expressions to be included in the join. Columns can be prefixed with 'table_id.column_name', where 'table_id' is the table name or alias. Columns can be aliased via the syntax 'column_name as alias'. Wild cards '*' can be used to include all columns across member tables or 'table_id.*' for all of a single table's columns. Columns and column expressions composing the join must be uniquely named or aliased--therefore, the '*' wild card cannot be used if column names aren't unique across all tables.

setColumnNames

public CreateJoinTableRequest setColumnNames(List<String> columnNames)

Parameters:

columnNames - List of member table columns or column expressions to be included in the join. Columns can be prefixed with 'table_id.column_name', where 'table_id' is the table name or alias. Columns can be aliased via the syntax 'column_name as alias'. Wild cards '*' can be used to include all columns across member tables or 'table_id.*' for all of a single table's columns. Columns and column expressions composing the join must be uniquely named or aliased--therefore, the '*' wild card cannot be used if column names aren't unique across all tables.

Returns:

this to mimic the builder pattern.

getExpressions

public List<String> getExpressions()

Returns:

An optional list of expressions to combine and filter the joined tables. Corresponds to a SQL statement WHERE clause. For details see: expressions. The default value is an empty List.

setExpressions

public CreateJoinTableRequest setExpressions(List<String> expressions)

Parameters:

expressions - An optional list of expressions to combine and filter the joined tables. Corresponds to a SQL statement WHERE clause. For details see: expressions. The default value is an empty List.

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 joinTableName. This is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_join_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the join as part of joinTableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of a schema for the join. If the schema is non-existent, it will be automatically created. The default value is ''.
• MAX_QUERY_DIMENSIONS: No longer used.
• OPTIMIZE_LOOKUPS: Use more memory to speed up the joining of tables. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.
• TTL: Sets the TTL of the join table specified in joinTableName.
• VIEW_ID: view this projection is part of. The default value is ''.
• NO_COUNT: Return a count of 0 for the join table for logging and for GPUdb.showTable(ShowTableRequest); optimization needed for large overlapped equi-join stencils. The default value is 'false'.
• CHUNK_SIZE: Maximum number of records per joined-chunk for this table. Defaults to the gpudb.conf file chunk size

The default value is an empty Map.

setOptions

public CreateJoinTableRequest 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 joinTableName. This is always allowed even if the caller does not have permission to create tables. The generated name is returned in qualified_join_table_name. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• COLLECTION_NAME: [DEPRECATED--please specify the containing schema for the join as part of joinTableName and use GPUdb.createSchema(CreateSchemaRequest) to create the schema if non-existent] Name of a schema for the join. If the schema is non-existent, it will be automatically created. The default value is ''.
• MAX_QUERY_DIMENSIONS: No longer used.
• OPTIMIZE_LOOKUPS: Use more memory to speed up the joining of tables. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• STRATEGY_DEFINITION: The tier strategy for the table and its columns.
• TTL: Sets the TTL of the join table specified in joinTableName.
• VIEW_ID: view this projection is part of. The default value is ''.
• NO_COUNT: Return a count of 0 for the join table for logging and for GPUdb.showTable(ShowTableRequest); optimization needed for large overlapped equi-join stencils. The default value is 'false'.
• CHUNK_SIZE: Maximum number of records per joined-chunk for this table. Defaults to the gpudb.conf file chunk size

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