Compatible with old and new versions

src/main/java/io/github/linwancen/plugin/show/CopyReferenceSimple.java

@@ -7,7 +7,6 @@ import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
 import com.intellij.psi.PsiDocumentManager;
-import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -22,7 +21,7 @@ public class CopyReferenceSimple extends CopyReferenceAction {
         super.update(e);
         String tip = IdeBundle.message("copy.reference");
         if (tip != null && tip.replace("\u001B", "").equals(e.getPresentation().getText())) {
-            e.getPresentation().setText("Copy Class.Method/File:Line");
+            e.getPresentation().setText("Copy Class.Method / File:Line");
         }
     }
 
@@ -30,7 +29,9 @@ public class CopyReferenceSimple extends CopyReferenceAction {
 
     @Nullable
     @Override
-    protected String getQualifiedName(@NotNull Editor editor, List<PsiElement> elements) {
+    protected String getQualifiedName(@NotNull Editor editor, List elements) {
+        // because 2nd param is List<PsiElement> in 2020.1 and List<? extends PsiElement> in new version
+        //noinspection unchecked
         String qualifiedName = super.getQualifiedName(editor, elements);
         if (qualifiedName == null) {
             @NotNull Document document = editor.getDocument();

src/main/java/io/github/linwancen/plugin/show/lang/SqlLangDoc.java

@@ -2,7 +2,6 @@ package io.github.linwancen.plugin.show.lang;
 
 import com.intellij.database.psi.DbElement;
 import com.intellij.psi.PsiElement;
-import com.intellij.sql.SqlDocumentationProvider;
 import com.intellij.sql.psi.SqlLanguage;
 import com.intellij.sql.psi.SqlReferenceExpression;
 import com.intellij.util.containers.JBIterable;
@@ -13,6 +12,8 @@ import io.github.linwancen.plugin.show.bean.LineInfo;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.lang.reflect.Method;
+
 public class SqlLangDoc extends BaseLangDoc {
 
     static {
@@ -34,8 +35,22 @@ public class SqlLangDoc extends BaseLangDoc {
     protected @Nullable <T extends SettingsInfo> String refElementDoc(@NotNull T lineInfo,
                                                                       @NotNull PsiElement ref) {
         JBIterable<DbElement> relatedDbElements;
+        Class<?> clazz;
         try {
-            relatedDbElements = SqlDocumentationProvider.findRelatedDbElements(ref, false);
+            // new version new Class
+            clazz = Class.forName("com.intellij.sql.SqlNavigationUtils");
+        } catch (Throwable e) {
+            try {
+                // old version
+                clazz = Class.forName("com.intellij.sql.SqlDocumentationProvider");
+            } catch (Throwable e2) {
+                return null;
+            }
+        }
+        try {
+            Method method = clazz.getMethod("findRelatedDbElements", PsiElement.class, boolean.class);
+            //noinspection unchecked
+            relatedDbElements = (JBIterable<DbElement>) method.invoke(null, ref, false);
         } catch (Throwable e) {
             return null;
         }

src/main/resources/META-INF/plugin.xml

@@ -117,7 +117,7 @@ Show doc comment at the Project view Tree, line End, json etc.
     <action
         id="io.github.linwancen.plugin.show.CopyReferenceSimple"
         class="io.github.linwancen.plugin.show.CopyReferenceSimple"
-        text="Copy Class.Method/File:Line">
+        text="Copy Class.Method / File:Line">
       <add-to-group group-id="EditorPopupMenu" anchor="after"
                     relative-to-action="CopyReference"/>
     </action>