org.apache.flink.table.planner.hint

类 FlinkHints

java.lang.Object

org.apache.flink.table.planner.hint.FlinkHints

public abstract class FlinkHints
extends Object

Utility class for Flink hints.

字段概要

字段

限定符和类型	字段和说明
static String	HINT_NAME_JSON_AGGREGATE_WRAPPED Internal hint that JSON aggregation function arguments have been wrapped already.
static String	HINT_NAME_OPTIONS

构造器概要

构造器

构造器和说明
FlinkHints()

方法概要

限定符和类型	方法和说明
static Map<String,String>	getHintedOptions(List<org.apache.calcite.rel.hint.RelHint> tableHints) Returns the OPTIONS hint options from the given list of table hints tableHints, never null.
static Map<String,String>	mergeTableOptions(Map<String,String> hints, Map<String,String> props) Merges the dynamic table options from hints and static table options from table definition props.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

HINT_NAME_OPTIONS

public static final String HINT_NAME_OPTIONS

另请参阅:

常量字段值

HINT_NAME_JSON_AGGREGATE_WRAPPED

public static final String HINT_NAME_JSON_AGGREGATE_WRAPPED

Internal hint that JSON aggregation function arguments have been wrapped already. See WrapJsonAggFunctionArgumentsRule.

另请参阅:

常量字段值

构造器详细资料

FlinkHints

public FlinkHints()

方法详细资料

getHintedOptions

public static Map<String,String> getHintedOptions(List<org.apache.calcite.rel.hint.RelHint> tableHints)

Returns the OPTIONS hint options from the given list of table hints tableHints, never null.

mergeTableOptions

public static Map<String,String> mergeTableOptions(Map<String,String> hints,
                                                   Map<String,String> props)

Merges the dynamic table options from hints and static table options from table definition props.

The options in hints would override the ones in props if they have the same option key.

参数:

hints - Dynamic table options, usually from the OPTIONS hint

props - Static table options defined in DDL or connect API

返回:

New options with merged dynamic table options, or the old props if there is no dynamic table options