diff --git a/src/main/kotlin/org/domaframework/doma/intellij/reference/SqlPsiReferenceProvider.kt b/src/main/kotlin/org/domaframework/doma/intellij/reference/SqlPsiReferenceProvider.kt
index 922003d1..cd878e1e 100644
--- a/src/main/kotlin/org/domaframework/doma/intellij/reference/SqlPsiReferenceProvider.kt
+++ b/src/main/kotlin/org/domaframework/doma/intellij/reference/SqlPsiReferenceProvider.kt
@@ -27,6 +27,7 @@ import org.domaframework.doma.intellij.psi.SqlElClass
 import org.domaframework.doma.intellij.psi.SqlElForDirective
 import org.domaframework.doma.intellij.psi.SqlElFunctionCallExpr
 import org.domaframework.doma.intellij.psi.SqlElIdExpr
+import org.domaframework.doma.intellij.psi.SqlElParameters
 import org.domaframework.doma.intellij.psi.SqlElStaticFieldAccessExpr
 import org.domaframework.doma.intellij.psi.SqlTypes
 
@@ -41,6 +42,9 @@ class SqlPsiReferenceProvider : PsiReferenceProvider() {
             arrayOf(SqlElClassExprReference(element))
         } else if (element is SqlElIdExpr) {
             when {
+                getParentClassPsiType(element, SqlElParameters::class.java) != null ->
+                    arrayOf(SqlElIdExprReference(element))
+
                 getParentClassPsiType(element, SqlElFunctionCallExpr::class.java) != null ->
                     arrayOf(SqlElFunctionCallExprReference(element))
 
diff --git a/src/test/kotlin/org/domaframework/doma/intellij/reference/SqlReferenceTestCase.kt b/src/test/kotlin/org/domaframework/doma/intellij/reference/SqlReferenceTestCase.kt
index 4ca2746a..0279e44b 100644
--- a/src/test/kotlin/org/domaframework/doma/intellij/reference/SqlReferenceTestCase.kt
+++ b/src/test/kotlin/org/domaframework/doma/intellij/reference/SqlReferenceTestCase.kt
@@ -27,15 +27,15 @@ import org.domaframework.doma.intellij.psi.SqlTypes
 import org.jetbrains.kotlin.idea.core.util.toPsiFile
 
 class SqlReferenceTestCase : DomaSqlTest() {
-    val testPackage = "reference"
-    val testDaoName = "ReferenceTestDao"
+    private val testPackage = "reference"
+    private val testDaoName = "ReferenceTestDao"
 
-    val forItemResolve = "SqlElIdExprImpl(EL_ID_EXPR)"
-    val forItemFieldAccessResolve = "SqlElFieldAccessExprImpl(EL_FIELD_ACCESS_EXPR)"
-    val daoParameterResolve = "PsiParameter"
-    val fieldResolve = "PsiField"
-    val methodResolve = "PsiMethod"
-    val classResolve = "PsiClass"
+    private val forItemResolve = "SqlElIdExprImpl(EL_ID_EXPR)"
+    private val forItemFieldAccessResolve = "SqlElFieldAccessExprImpl(EL_FIELD_ACCESS_EXPR)"
+    private val daoParameterResolve = "PsiParameter"
+    private val fieldResolve = "PsiField"
+    private val methodResolve = "PsiMethod"
+    private val classResolve = "PsiClass"
 
     override fun setUp() {
         super.setUp()
@@ -67,11 +67,15 @@ class SqlReferenceTestCase : DomaSqlTest() {
             mapOf(
                 "detail" to listOf("$daoParameterResolve:detail"),
                 "getFirstEmployee" to listOf("$methodResolve:getFirstEmployee"),
+                "getCustomNumber" to listOf("$methodResolve:getCustomNumber"),
+                "projectCategory" to listOf("$fieldResolve:projectCategory"),
                 "projectNumber" to listOf("$fieldResolve:projectNumber"),
                 "projects" to listOf("$daoParameterResolve:projects"),
                 "project" to listOf(forItemResolve),
                 "id" to listOf(null),
+                "null" to listOf(null),
                 "employeeId" to listOf("$fieldResolve:employeeId"),
+                "isNotBlank" to listOf("$methodResolve:isNotBlank"),
             ),
         )
     }
@@ -85,7 +89,10 @@ class SqlReferenceTestCase : DomaSqlTest() {
                 "projectCategory" to listOf("$fieldResolve:projectCategory"),
                 "getTermNumber" to listOf("$methodResolve:getTermNumber"),
                 "getFirstEmployee" to listOf("$methodResolve:getFirstEmployee"),
+                "getCustomNumber" to listOf("$methodResolve:getCustomNumber"),
+                "detail" to listOf("$daoParameterResolve:detail"),
                 "employeeId" to listOf("$fieldResolve:employeeId"),
+                "toString" to listOf("$methodResolve:toString"),
             ),
         )
     }
diff --git a/src/test/testData/src/main/java/doma/example/dao/reference/ReferenceTestDao.java b/src/test/testData/src/main/java/doma/example/dao/reference/ReferenceTestDao.java
index 704ccab2..055d619c 100644
--- a/src/test/testData/src/main/java/doma/example/dao/reference/ReferenceTestDao.java
+++ b/src/test/testData/src/main/java/doma/example/dao/reference/ReferenceTestDao.java
@@ -14,7 +14,7 @@ public interface ReferenceTestDao {
   Project referenceEntityProperty(List<Project> projects, ProjectDetail detail);
 
   @Select
-  ProjectDetail referenceStaticField();
+  ProjectDetail referenceStaticField(ProjectDetail detail);
 
   @Select
   List<Employee> referenceListFieldMethod(List<Employee> employeesList);
diff --git a/src/test/testData/src/main/java/doma/example/entity/ProjectDetail.java b/src/test/testData/src/main/java/doma/example/entity/ProjectDetail.java
index 4547ab89..c766bead 100644
--- a/src/test/testData/src/main/java/doma/example/entity/ProjectDetail.java
+++ b/src/test/testData/src/main/java/doma/example/entity/ProjectDetail.java
@@ -17,6 +17,7 @@ public class ProjectDetail {
 
   // Accessible static fields
   public static Integr projectNumber;
+  private static String projectName;
   private static String projectCategory;
 
   private static Employee manager = new Employee();
@@ -39,4 +40,8 @@ public void addTermNumber(){
     projectNumber++;
   }
 
+  public static String getCustomNumber(String prefix) {
+    return prefix + projectName;
+  }
+
 }
\ No newline at end of file
diff --git a/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceEntityProperty.sql b/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceEntityProperty.sql
index 06e70e91..348f95b7 100644
--- a/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceEntityProperty.sql
+++ b/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceEntityProperty.sql
@@ -1,7 +1,11 @@
 SELECT *
   FROM project_detail
  WHERE detail_id = /* detail.getFirstEmployee().employeeId */0
+   /*%if (detail != null && @isNotBlank(detail.projectCategory)) */
+   AND detail_id = /* detail.getCustomNumber(detail.projectCategory) */'number'
    /*%for project : projects */
    AND project_id = /* project.id */0
+   AND detail_sub_id = /* detail.getCustomNumber(project.projectCategory) */'sub'
    /*%end*/
-OR number = /* detail.projectNumber */
\ No newline at end of file
+   /*%end*/
+    OR number = /* detail.projectNumber */0
diff --git a/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceStaticField.sql b/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceStaticField.sql
index 1309053a..6c7561a0 100644
--- a/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceStaticField.sql
+++ b/src/test/testData/src/main/resources/META-INF/doma/example/dao/reference/ReferenceTestDao/referenceStaticField.sql
@@ -1,4 +1,5 @@
 SELECT *
   FROM project_detail
  WHERE category = /* @doma.example.entity.ProjectDetail@projectCategory */'category'
-   AND number = /* @doma.example.entity.Project@getFirstEmployee().employeeId */'9999'
+   AND number = /* @doma.example.entity.Project@getFirstEmployee().employeeId.toString() */'9999'
+    OR number = /* @doma.example.entity.ProjectDetail@getCustomNumber(detail.projectCategory) */'number'