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MySQLの補足資料 | DBFlute
で複合ユニーク制約を付けた場合、"A と null" と "A と null" の二つのレコードは登録できます。つまり、この場合の二つの null はそれぞれ別の値として扱われます。...current_timestamp() と同じ null の場合のデフォルト値 coalesce() 関数を利用することで、対象値が null の場合のデフォルト値を設定することができます。...dbflute.seasar.org/ja/manual/reference/dbway/mysql/supplement.html -
Types | Painless Scripting Language [8.19] | El...
newly-declared reference type variable is null . A reference type value is...method/function call. Assign null to a reference type variable...www.elastic.co/guide/en/elasticsearch/painless/8.19/painless-types.html -
Problem (Spring Framework 7.0.0 API)
the time of the error (may be null ). String getResourceDescripti...that caused the error (may be null ). String toString () ...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/beans/factory/parsin... -
FormHttpMessageConverter (Spring Framework 7.0....
null . The list may also exclude...the media type to read (can be null if not specified); typically...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/http/converter/FormH... -
JettyWebSocketSession (Spring Framework 7.0.1 API)
the handshake request (never null ). String getId () Return a...associated with the session; if null we'll fall back on the user...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/socket/adapter/j... -
MessageRequestReplyOperations (Spring Framework...
possibly null if the message could not be...Returns: the reply, possibly null if the message could not be...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/messaging/core/Messa... -
JdbcTemplate (Spring Framework 7.0.0 API)
object (may be null if the given RowMapper returned null ) Throws:...required type, or null in case of SQL NULL Throws: DataAccessException...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/jdbc/core/JdbcTempla... -
enhanced-sastruts-blank.zip
Throwable { Object ret = null; Throwable cause = null; final String classPureName...&& cause == null) { return " to " + (ret != null ? ret.toString()...dbflute.seasar.org/download/misc/friends/enhanced-sastruts-blank.zip -
EmptyTargetSource (Spring Framework 7.0.1 API)
getTarget () Always returns null . @Nullable Class <?>...the specified target Class, or null if none. int hashCode () ...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/aop/target/EmptyTarg... -
org.springframework.r2dbc.core.binding (Spring ...
object representing value and null bindings for a Statement using...objects representing a value or a NULL binding. BindMarker A bind marker...docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/r2dbc/core/binding/p...