Add Hibernate 7 batches 2-6, batch 7, and batch 8: mapping styles, JPA annotations, natural IDs, @Immutable, stored procedures, in-memory test databases, JNDI mocking, proxies, associations, temporal mapping, named queries, HQL, Criteria API, EntityManager bootstrapping, Ehcache 3 L2 cache configuration, HikariCP connection pooling, Hibernate Validator CDI integration, aggregate functions, sorting, pagination, interceptors, and Hibernate Search 8 (Hibernate 7.4.5.Final + Spring Boot 4.1.1 + JDK 25)

src/main/java/com/ankurm/hibernatedemo/datetime/NanoPrecisionEntity.java

@@ -0,0 +1,58 @@
+package com.ankurm.hibernatedemo.datetime;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.time.Instant;
+import java.time.LocalDateTime;
+
+/** Docs: 13-date-and-time-mapping.md, chapter "Second-precision / truncation". */
+@Entity
+@Table(name = "nano_precision")
+public class NanoPrecisionEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private LocalDateTime plainLocalDateTime;
+
+    @Column(precision = 9)
+    private LocalDateTime highPrecisionLocalDateTime;
+
+    private Instant plainInstant;
+
+    protected NanoPrecisionEntity() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public LocalDateTime getPlainLocalDateTime() {
+        return plainLocalDateTime;
+    }
+
+    public void setPlainLocalDateTime(LocalDateTime v) {
+        this.plainLocalDateTime = v;
+    }
+
+    public LocalDateTime getHighPrecisionLocalDateTime() {
+        return highPrecisionLocalDateTime;
+    }
+
+    public void setHighPrecisionLocalDateTime(LocalDateTime v) {
+        this.highPrecisionLocalDateTime = v;
+    }
+
+    public Instant getPlainInstant() {
+        return plainInstant;
+    }
+
+    public void setPlainInstant(Instant v) {
+        this.plainInstant = v;
+    }
+}