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Spring Data DSL module for Web querying and Criteria building

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package org.springframework.data.r2dbc.dialect;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.springframework.data.mapping.model.SimpleTypeHolder;
import org.springframework.data.r2dbc.mapping.R2dbcSimpleTypeHolder;
import org.springframework.data.relational.core.dialect.Dialect;
import org.springframework.data.relational.core.sql.SqlIdentifier;
import org.springframework.r2dbc.core.binding.BindMarkersFactory;

/**
 * R2DBC-specific extension to {@link Dialect}. Represents a dialect that is implemented by a particular database.
 *
 * @author Mark Paluch
 * @author Jens Schauder
 * @author Michael Berry
 */
public interface R2dbcDialect extends Dialect {

	/**
	 * Returns the {@link BindMarkersFactory} used by this dialect.
	 *
	 * @return the {@link BindMarkersFactory} used by this dialect.
	 */
	BindMarkersFactory getBindMarkersFactory();

	/**
	 * Return a collection of types that are natively supported by this database/driver. Defaults to
	 * {@link Collections#emptySet()}.
	 *
	 * @return a collection of types that are natively supported by this database/driver. Defaults to
	 *         {@link Collections#emptySet()}.
	 */
	default Collection> getSimpleTypes() {
		return Collections.emptySet();
	}

	/**
	 * Return the {@link SimpleTypeHolder} for this dialect.
	 *
	 * @return the {@link SimpleTypeHolder} for this dialect.
	 * @see #getSimpleTypes()
	 */
	default SimpleTypeHolder getSimpleTypeHolder() {

		Set> simpleTypes = new HashSet<>(getSimpleTypes());
		simpleTypes.addAll(R2dbcSimpleTypeHolder.R2DBC_SIMPLE_TYPES);

		return new SimpleTypeHolder(simpleTypes, true);
	}

	/**
	 * Return a collection of converters for this dialect.
	 *
	 * @return a collection of converters for this dialect.
	 */
	default Collection