Add logback as your dependency
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
    </dependency>
and add the file logback.xml to your resources folder:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
        <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
</appender>
<root level="debug">
    <appender-ref ref="STDOUT" />
</root>
If I remember it correctly, you can enable dubug level only in the class that prints the query with the following configuration:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
        <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
</appender>
<logger name="org.springframework.data.couchbase.repository.query" level="debug" />
<root level="info">
    <appender-ref ref="STDOUT" />
</root>