com.gpudb.protocol

Class AppendRecordsRequest

java.lang.Object

com.gpudb.protocol.AppendRecordsRequest

All Implemented Interfaces:

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

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

A set of parameters for GPUdb.appendRecords(AppendRecordsRequest).

Append (or insert) all records from a source table (specified by sourceTableName) to a particular target table (specified by tableName). The field map (specified by fieldMap) holds the user specified map of target table column names with their mapped source column names.

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor and Description
AppendRecordsRequest() Constructs an AppendRecordsRequest object with default parameters.
AppendRecordsRequest(String tableName, String sourceTableName, Map<String,String> fieldMap, Map<String,String> options) Constructs an AppendRecordsRequest 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.
Map<String,String>	getFieldMap()
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.
String	getSourceTableName()
String	getTableName()
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.
AppendRecordsRequest	setFieldMap(Map<String,String> fieldMap)
AppendRecordsRequest	setOptions(Map<String,String> options)
AppendRecordsRequest	setSourceTableName(String sourceTableName)
AppendRecordsRequest	setTableName(String tableName)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AppendRecordsRequest

public AppendRecordsRequest()

Constructs an AppendRecordsRequest object with default parameters.

AppendRecordsRequest

public AppendRecordsRequest(String tableName,
                            String sourceTableName,
                            Map<String,String> fieldMap,
                            Map<String,String> options)

Constructs an AppendRecordsRequest object with the specified parameters.

Parameters:

tableName - The table name for the records to be appended. Must be an existing table.

sourceTableName - The source table name to get records from. Must be an existing table name.

fieldMap - Contains the mapping of column names from the target table (specified by tableName) as the keys, and corresponding column names or expressions (e.g., 'col_name+1') from the source table (specified by sourceTableName). Must be existing column names in source table and target table, and their types must be matched. For details on using expressions, see Expressions.

options - Optional parameters.

• OFFSET: A positive integer indicating the number of initial results to skip from source table (specified by sourceTableName). Default is 0. The minimum allowed value is 0. The maximum allowed value is MAX_INT. The default value is '0'.
• LIMIT: A positive integer indicating the maximum number of results to be returned from source table (specified by sourceTableName). Or END_OF_SET (-9999) to indicate that the max number of results should be returned. The default value is '-9999'.
• EXPRESSION: Optional filter expression to apply to the source table (specified by sourceTableName). Empty by default. The default value is ''.
• ORDER_BY: Comma-separated list of the columns and expressions to be sorted by from the source table (specified by sourceTableName); e.g. 'timestamp asc, x desc'. The order_by columns do not have to be present in fieldMap. The default value is ''.
• UPDATE_ON_EXISTING_PK: Specifies the record collision policy for inserting the source table records (specified by sourceTableName) into the target table (specified by tableName) table with a primary key. If set to true, any existing target table record with primary key values that match those of a source table record being inserted will be replaced by that new record. If set to false, any existing target table record with primary key values that match those of a source table record being inserted will remain unchanged and the new record discarded. If the specified table does not have a primary key, then this option is ignored. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• TRUNCATE_STRINGS: If set to true, it allows inserting unrestricted length strings into charN string columns by truncating the unrestricted length strings to fit. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.

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:

The table name for the records to be appended. Must be an existing table.

setTableName

public AppendRecordsRequest setTableName(String tableName)

Parameters:

tableName - The table name for the records to be appended. Must be an existing table.

Returns:

this to mimic the builder pattern.

getSourceTableName

public String getSourceTableName()

Returns:

The source table name to get records from. Must be an existing table name.

setSourceTableName

public AppendRecordsRequest setSourceTableName(String sourceTableName)

Parameters:

sourceTableName - The source table name to get records from. Must be an existing table name.

Returns:

this to mimic the builder pattern.

getFieldMap

public Map<String,String> getFieldMap()

Returns:

Contains the mapping of column names from the target table (specified by tableName) as the keys, and corresponding column names or expressions (e.g., 'col_name+1') from the source table (specified by sourceTableName). Must be existing column names in source table and target table, and their types must be matched. For details on using expressions, see Expressions.

setFieldMap

public AppendRecordsRequest setFieldMap(Map<String,String> fieldMap)

Parameters:

fieldMap - Contains the mapping of column names from the target table (specified by tableName) as the keys, and corresponding column names or expressions (e.g., 'col_name+1') from the source table (specified by sourceTableName). Must be existing column names in source table and target table, and their types must be matched. For details on using expressions, see Expressions.

Returns:

this to mimic the builder pattern.

getOptions

public Map<String,String> getOptions()

Returns:

Optional parameters.

• OFFSET: A positive integer indicating the number of initial results to skip from source table (specified by sourceTableName). Default is 0. The minimum allowed value is 0. The maximum allowed value is MAX_INT. The default value is '0'.
• LIMIT: A positive integer indicating the maximum number of results to be returned from source table (specified by sourceTableName). Or END_OF_SET (-9999) to indicate that the max number of results should be returned. The default value is '-9999'.
• EXPRESSION: Optional filter expression to apply to the source table (specified by sourceTableName). Empty by default. The default value is ''.
• ORDER_BY: Comma-separated list of the columns and expressions to be sorted by from the source table (specified by sourceTableName); e.g. 'timestamp asc, x desc'. The order_by columns do not have to be present in fieldMap. The default value is ''.
• UPDATE_ON_EXISTING_PK: Specifies the record collision policy for inserting the source table records (specified by sourceTableName) into the target table (specified by tableName) table with a primary key. If set to true, any existing target table record with primary key values that match those of a source table record being inserted will be replaced by that new record. If set to false, any existing target table record with primary key values that match those of a source table record being inserted will remain unchanged and the new record discarded. If the specified table does not have a primary key, then this option is ignored. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• TRUNCATE_STRINGS: If set to true, it allows inserting unrestricted length strings into charN string columns by truncating the unrestricted length strings to fit. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.

The default value is an empty Map.

setOptions

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

Parameters:

options - Optional parameters.

• OFFSET: A positive integer indicating the number of initial results to skip from source table (specified by sourceTableName). Default is 0. The minimum allowed value is 0. The maximum allowed value is MAX_INT. The default value is '0'.
• LIMIT: A positive integer indicating the maximum number of results to be returned from source table (specified by sourceTableName). Or END_OF_SET (-9999) to indicate that the max number of results should be returned. The default value is '-9999'.
• EXPRESSION: Optional filter expression to apply to the source table (specified by sourceTableName). Empty by default. The default value is ''.
• ORDER_BY: Comma-separated list of the columns and expressions to be sorted by from the source table (specified by sourceTableName); e.g. 'timestamp asc, x desc'. The order_by columns do not have to be present in fieldMap. The default value is ''.
• UPDATE_ON_EXISTING_PK: Specifies the record collision policy for inserting the source table records (specified by sourceTableName) into the target table (specified by tableName) table with a primary key. If set to true, any existing target table record with primary key values that match those of a source table record being inserted will be replaced by that new record. If set to false, any existing target table record with primary key values that match those of a source table record being inserted will remain unchanged and the new record discarded. If the specified table does not have a primary key, then this option is ignored. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• TRUNCATE_STRINGS: If set to true, it allows inserting unrestricted length strings into charN string columns by truncating the unrestricted length strings to fit. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.

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