diff --git a/core/src/main/java/org/apache/calcite/sql/type/SqlTypeFactoryImpl.java b/core/src/main/java/org/apache/calcite/sql/type/SqlTypeFactoryImpl.java
index 115b66fa215f..d0ccab7dfd2f 100644
--- a/core/src/main/java/org/apache/calcite/sql/type/SqlTypeFactoryImpl.java
+++ b/core/src/main/java/org/apache/calcite/sql/type/SqlTypeFactoryImpl.java
@@ -561,7 +561,7 @@ private static void assertBasic(SqlTypeName typeName) {
           }
         }
 
-        if (type.getSqlTypeName() == resultType.getSqlTypeName()
+        if (type.getSqlTypeName().getFamily() == resultType.getSqlTypeName().getFamily()
             && type.getSqlTypeName().allowsPrec()
             && type.getPrecision() != resultType.getPrecision()) {
           final int precision =
diff --git a/core/src/test/java/org/apache/calcite/sql/type/SqlTypeFactoryTest.java b/core/src/test/java/org/apache/calcite/sql/type/SqlTypeFactoryTest.java
index 8f5e5e4018db..f0ff190d28c7 100644
--- a/core/src/test/java/org/apache/calcite/sql/type/SqlTypeFactoryTest.java
+++ b/core/src/test/java/org/apache/calcite/sql/type/SqlTypeFactoryTest.java
@@ -33,6 +33,7 @@
 
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.hasToString;
 import static org.junit.jupiter.api.Assertions.assertFalse;
@@ -172,6 +173,30 @@ class SqlTypeFactoryTest {
     assertThat(leastRestrictive.getPrecision(), is(3));
   }
 
+  /**
+   * Test case for
+   * <a href="https://issues.apache.org/jira/browse/CALCITE-7567">
+   * LeastRetrictiveSqlType for TIMESTAMP, TIMESTAMP_LTZ might ignore precision</a>. */
+  @Test void testLeastRestrictiveForTimestampAndTimestampLtz() {
+    SqlTypeFixture f = new SqlTypeFixture();
+    RelDataType ltz0 =
+        f.typeFactory.createSqlType(SqlTypeName.TIMESTAMP_WITH_LOCAL_TIME_ZONE, 0);
+    RelDataType leastRestrictive =
+        f.typeFactory.leastRestrictive(Lists.newArrayList(ltz0, f.sqlTimestampPrec3));
+    assertThat(leastRestrictive, is(notNullValue()));
+    assertThat(leastRestrictive.getPrecision(), is(3));
+  }
+
+  @Test void testLeastRestrictiveForTimestampLtzAndTimestamp() {
+    SqlTypeFixture f = new SqlTypeFixture();
+    RelDataType ltz0 =
+        f.typeFactory.createSqlType(SqlTypeName.TIMESTAMP_WITH_LOCAL_TIME_ZONE, 0);
+    RelDataType leastRestrictive =
+        f.typeFactory.leastRestrictive(Lists.newArrayList(f.sqlTimestampPrec3, ltz0));
+    assertThat(leastRestrictive, is(notNullValue()));
+    assertThat(leastRestrictive.getPrecision(), is(3));
+  }
+
   @Test void testLeastRestrictiveForTimestampAndDate() {
     SqlTypeFixture f = new SqlTypeFixture();
     RelDataType leastRestrictive =