diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
index b27d6ed0efed..2d53e26c0d11 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
@@ -473,8 +473,7 @@ object TypeCoercion {
         val rhs = sub.output
 
         val commonTypes = lhs.zip(rhs).flatMap { case (l, r) =>
-          findCommonTypeForBinaryComparison(l.dataType, r.dataType, conf)
-            .orElse(findTightestCommonType(l.dataType, r.dataType))
+          findWiderTypeForTwo(l.dataType, r.dataType)
         }
 
         // The number of columns/expressions must match between LHS and RHS of an
diff --git a/sql/core/src/test/resources/sql-tests/inputs/subquery/negative-cases/subq-input-typecheck.sql b/sql/core/src/test/resources/sql-tests/inputs/subquery/negative-cases/subq-input-typecheck.sql
index 95b115a8dd09..98ce1354a135 100644
--- a/sql/core/src/test/resources/sql-tests/inputs/subquery/negative-cases/subq-input-typecheck.sql
+++ b/sql/core/src/test/resources/sql-tests/inputs/subquery/negative-cases/subq-input-typecheck.sql
@@ -18,7 +18,7 @@ CREATE TEMPORARY VIEW t4 AS SELECT * FROM VALUES
 AS t1(t4a, t4b, t4c);
 
 CREATE TEMPORARY VIEW t5 AS SELECT * FROM VALUES
-  (CAST(1 AS DECIMAL(18, 0)), CAST(2 AS STRING), CAST(3 AS BIGINT))
+  (CAST('2011-01-01 01:01:01' AS TIMESTAMP), CAST(2 AS STRING), CAST(3 AS BIGINT))
 AS t1(t5a, t5b, t5c);
 
 -- TC 01.01
diff --git a/sql/core/src/test/resources/sql-tests/results/subquery/negative-cases/subq-input-typecheck.sql.out b/sql/core/src/test/resources/sql-tests/results/subquery/negative-cases/subq-input-typecheck.sql.out
index dcd30055bca1..ea7585716de8 100644
--- a/sql/core/src/test/resources/sql-tests/results/subquery/negative-cases/subq-input-typecheck.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/subquery/negative-cases/subq-input-typecheck.sql.out
@@ -44,7 +44,7 @@ struct<>
 
 -- !query 4
 CREATE TEMPORARY VIEW t5 AS SELECT * FROM VALUES
-  (CAST(1 AS DECIMAL(18, 0)), CAST(2 AS STRING), CAST(3 AS BIGINT))
+  (CAST('2011-01-01 01:01:01' AS TIMESTAMP), CAST(2 AS STRING), CAST(3 AS BIGINT))
 AS t1(t5a, t5b, t5c)
 -- !query 4 schema
 struct<>
@@ -139,8 +139,8 @@ cannot resolve '(named_struct('t4a', t4.`t4a`, 't4b', t4.`t4b`, 't4c', t4.`t4c`)
 The data type of one or more elements in the left hand side of an IN subquery
 is not compatible with the data type of the output of the subquery
 Mismatched columns:
-[(t4.`t4a`:double, t5.`t5a`:decimal(18,0)), (t4.`t4c`:string, t5.`t5c`:bigint)]
+[(t4.`t4a`:double, t5.`t5a`:timestamp), (t4.`t4c`:string, t5.`t5c`:bigint)]
 Left side:
 [double, string, string].
 Right side:
-[decimal(18,0), string, bigint].;
+[timestamp, string, bigint].;
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 5b0de1baa553..37d98f7c8742 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -3313,6 +3313,27 @@ class SQLQuerySuite extends QueryTest with SharedSparkSession {
       cubeDF.join(cubeDF, "nums"),
       Row(1, 0, 0) :: Row(2, 0, 0) :: Row(3, 0, 0) :: Nil)
   }
+
+  test("SPARK-29860: Fix dataType mismatch issue for InSubquery") {
+    withTempView("ta", "tb", "tc", "td", "te", "tf") {
+      sql("CREATE TEMPORARY VIEW ta AS SELECT * FROM VALUES(CAST(1 AS DECIMAL(8, 0))) AS ta(id)")
+      sql("CREATE TEMPORARY VIEW tb AS SELECT * FROM VALUES(CAST(1 AS DECIMAL(7, 2))) AS tb(id)")
+      sql("CREATE TEMPORARY VIEW tc AS SELECT * FROM VALUES(CAST(1 AS DOUBLE)) AS tc(id)")
+      sql("CREATE TEMPORARY VIEW td AS SELECT * FROM VALUES(CAST(1 AS FLOAT)) AS td(id)")
+      sql("CREATE TEMPORARY VIEW te AS SELECT * FROM VALUES(CAST(1 AS BIGINT)) AS te(id)")
+      sql("CREATE TEMPORARY VIEW tf AS SELECT * FROM VALUES(CAST(1 AS DECIMAL(38, 38))) AS tf(id)")
+      val df1 = sql("SELECT id FROM ta WHERE id IN (SELECT id FROM tb)")
+      checkAnswer(df1, Row(new java.math.BigDecimal(1)))
+      val df2 = sql("SELECT id FROM ta WHERE id IN (SELECT id FROM tc)")
+      checkAnswer(df2, Row(new java.math.BigDecimal(1)))
+      val df3 = sql("SELECT id FROM ta WHERE id IN (SELECT id FROM td)")
+      checkAnswer(df3, Row(new java.math.BigDecimal(1)))
+      val df4 = sql("SELECT id FROM ta WHERE id IN (SELECT id FROM te)")
+      checkAnswer(df4, Row(new java.math.BigDecimal(1)))
+      val df5 = sql("SELECT id FROM ta WHERE id IN (SELECT id FROM tf)")
+      checkAnswer(df5, Array.empty[Row])
+    }
+  }
 }
 
 case class Foo(bar: Option[String])