org.apache.hadoop.hive.metastore.txn.jdbc

Interface ParameterizedCommand

All Superinterfaces:

ParameterizedQuery

All Known Implementing Classes:

DeleteReplTxnMapEntryCommand, InsertCompactionInfoCommand, InsertCompactionRequestCommand, RemoveCompactionMetricsDataCommand, RemoveDuplicateCompleteTxnComponentsCommand

public interface ParameterizedCommand
extends ParameterizedQuery

Represents a parameterized command (for exmaple an UPDATE statement) as a Spring NamedParameterJdbcTemplate style parameterized query string (for example: UPDATE TBL SET COL1 = :value WHERE ID = :id), its parameters, and a result policy. The result policy is a Function<Integer, Boolean> function which must decide if the number of affected rows is acceptable or not.

Field Summary

Fields

Modifier and Type	Field and Description
static Function<Integer,Boolean>	AT_LEAST_ONE_ROW Built-in result policy which returns true only if the number of affected rows is 1 or greater.
static Function<Integer,Boolean>	EXACTLY_ONE_ROW Built-in result policy which returns true only if the number of affected rows is exactly 1.

Method Summary

Modifier and Type	Method and Description
Function<Integer,Boolean>	resultPolicy()

Methods inherited from interface org.apache.hadoop.hive.metastore.txn.jdbc.ParameterizedQuery

getParameterizedQueryString, getQueryParameters

Field Detail

EXACTLY_ONE_ROW

static final Function<Integer,Boolean> EXACTLY_ONE_ROW

Built-in result policy which returns true only if the number of affected rows is exactly 1.

AT_LEAST_ONE_ROW

static final Function<Integer,Boolean> AT_LEAST_ONE_ROW

Built-in result policy which returns true only if the number of affected rows is 1 or greater.

Method Detail

resultPolicy

Function<Integer,Boolean> resultPolicy()

Returns:

Returns the result policy to be used to validate the number of affected rows.