From bbb185b44ebc93e21038e50597e29fe1fc6b7f09 Mon Sep 17 00:00:00 2001
From: Potmot <377029227@qq.com>
Date: Sun, 17 Nov 2024 21:52:45 +0800
Subject: [PATCH 1/2] Add KConfigurableRootQuery exists function

---
 .../jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt       | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt b/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
index abf24b7361..48f8f7e851 100644
--- a/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
+++ b/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
@@ -6,6 +6,7 @@ import org.babyfish.jimmer.lang.NewChain
 import org.babyfish.jimmer.sql.ast.query.PageFactory
 import org.babyfish.jimmer.sql.kt.ast.expression.rowCount
 import java.sql.Connection
+import org.babyfish.jimmer.sql.kt.ast.expression.constant
 
 interface KConfigurableRootQuery<E: Any, R> : KTypedRootQuery<R> {
 
@@ -26,6 +27,11 @@ interface KConfigurableRootQuery<E: Any, R> : KTypedRootQuery<R> {
             .withoutSortingAndPaging()
             .execute(con)[0]
 
+    fun exists(con: Connection? = null): Boolean =
+        limit(1)
+            .reselect { select(constant(1)) }
+            .execute(con).isEmpty()
+
     fun <P: Any> fetchPage(
         pageIndex: Int,
         pageSize: Int,

From bea56d9b2bb8ed3181647437ff5d6e6193a24965 Mon Sep 17 00:00:00 2001
From: Potmot <377029227@qq.com>
Date: Sun, 17 Nov 2024 23:25:50 +0800
Subject: [PATCH 2/2] Fix KConfigurableRootQuery.exists isEmpty -> isNotEmpty

---
 .../babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt b/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
index 48f8f7e851..0150bdacc7 100644
--- a/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
+++ b/project/jimmer-sql-kotlin/src/main/kotlin/org/babyfish/jimmer/sql/kt/ast/query/KConfigurableRootQuery.kt
@@ -30,7 +30,7 @@ interface KConfigurableRootQuery<E: Any, R> : KTypedRootQuery<R> {
     fun exists(con: Connection? = null): Boolean =
         limit(1)
             .reselect { select(constant(1)) }
-            .execute(con).isEmpty()
+            .execute(con).isNotEmpty()
 
     fun <P: Any> fetchPage(
         pageIndex: Int,