Package org.apache.calcite.sql.validate

Interface SqlNameMatcher

public interface SqlNameMatcher

Checks whether two names are the same according to a case-sensitivity policy.

See Also:

• SqlNameMatchers

Method Summary

Modifier and Type	Method	Description
String	bestString()	Returns the most recent match.
Set<String>	createSet()	Creates a set that has the same case-sensitivity as this matcher.
default List<String>	distinctCopy(Iterable<String> names)	Returns a copy of a collection, removing duplicates and retaining iteration order.
@Nullable RelDataTypeField	field(RelDataType rowType, String fieldName)	Finds a field with a given name, using the current case-sensitivity, returning null if not found.
int	frequency(Iterable<String> names, String name)	Returns how many times a string occurs in a collection.
<K extends List<String>, V> @Nullable V	get(Map<K,V> map, List<String> prefixNames, List<String> names)	Looks up an item in a map.
default int	indexOf(Iterable<String> names, String name)	Returns the index of the first element of a collection that matches.
boolean	isCaseSensitive()	Returns whether name matching is case-sensitive.
boolean	matches(String string, String name)	Returns a name matches another.

Method Details

isCaseSensitive

boolean isCaseSensitive()

Returns whether name matching is case-sensitive.

matches

boolean matches(String string,
 String name)

Returns a name matches another.

Parameters:

string - Name written in code

name - Name of object we are trying to match

Returns:

Whether matches

get

<K extends List<String>,
V> @Nullable V get(Map<K,V> map,
 List<String> prefixNames,
 List<String> names)

Looks up an item in a map.

bestString

String bestString()

Returns the most recent match.

In the default implementation, throws UnsupportedOperationException.

field

@Nullable RelDataTypeField field(RelDataType rowType,
 String fieldName)

Finds a field with a given name, using the current case-sensitivity, returning null if not found.

Parameters:

rowType - Row type

fieldName - Field name

Returns:

Field, or null if not found

frequency

int frequency(Iterable<String> names,
 String name)

Returns how many times a string occurs in a collection.

Similar to Collections.frequency(java.util.Collection<?>, java.lang.Object).

distinctCopy

default List<String> distinctCopy(Iterable<String> names)

Returns a copy of a collection, removing duplicates and retaining iteration order.

indexOf

default int indexOf(Iterable<String> names,
 String name)

Returns the index of the first element of a collection that matches.

createSet

Set<String> createSet()

Creates a set that has the same case-sensitivity as this matcher.