Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not set

去了stackoverflow：
java - Spring Boot JPA - Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not set - Stack Overflow
不是PostgreSQL，那就换成mysql的嘛：

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.Kingbase8Dialect

Could not load requested class : org.hibernate.dialect.Kingbase8Dialect

增加方言类：
class Kingbase8Dialect extends PostgreSQL9Dialect

    @Override
    public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)
            throws SQLException {
    if (dbMetaData == null) {
        builder.setQuotedCaseStrategy(IdentifierCaseStrategy.MIXED);
    }
    builder.applyIdentifierCasing( dbMetaData );

    builder.applyReservedWords( dbMetaData );
    builder.applyReservedWords( AnsiSqlKeywords.INSTANCE.sql2003() );
    builder.applyReservedWords(super.getKeywords());

    builder.setNameQualifierSupport( getNameQualifierSupport() );
    builder.setUnquotedCaseStrategy(IdentifierCaseStrategy.MIXED);
    return builder.build();