fix(hana): show tables under schemas

agents/common/src/main/java/com/dbx/agent/StandardJdbcMetadata.java

@@ -123,12 +123,12 @@ public final class StandardJdbcMetadata {
                 listObjects(listTables(conn, profile, configuredDatabase, schema, tableConstraints), schema)
             );
             DatabaseMetaData meta = conn.getMetaData();
-            appendRoutines(result, meta, null, blankToNull(schema), schema);
+            appendRoutines(result, meta, null, schema, schema);
             if (!containsRoutine(result)
                 && profile.getCatalogFallbackEnabled()
                 && configuredDatabase != null
                 && !configuredDatabase.trim().isEmpty()) {
-                appendRoutines(result, meta, configuredDatabase, blankToNull(schema), schema);
+                appendRoutines(result, meta, configuredDatabase, schema, schema);
             }
             result.sort(Comparator.comparing(ObjectInfo::getName));
             return normalized.filterObjects(result);
@@ -332,7 +332,9 @@ public final class StandardJdbcMetadata {
             return;
         }
         // JDBC has no portable metadata limit/offset. Use table types for safe pushdown and filter/page locally.
-        try (ResultSet rs = meta.getTables(catalog, blankToNull(schema), "%", tableTypes)) {
+        // schema 是 DatabaseMetaData.getTables() 的 schemaPattern，_ 和 % 具有通配符语义；
+        // HANA 存在 _SYS_RT 等含下划线的 schema，需按 getSearchStringEscape() 转义，避免混入其他 schema 的对象。
+        try (ResultSet rs = meta.getTables(catalog, escapeSchemaPattern(meta, schema), "%", tableTypes)) {
             while (rs.next()) {
                 result.add(new TableInfo(
                     rs.getString("TABLE_NAME"),
@@ -618,16 +620,18 @@ public final class StandardJdbcMetadata {
         List<ObjectInfo> result,
         DatabaseMetaData meta,
         String catalog,
-        String schemaPattern,
-        String schema
+        String schema,
+        String schemaLabel
     ) {
+        // schema 作为 getProcedures/getFunctions 的 schemaPattern，同样需要转义 _ 和 % 通配符。
+        String schemaPattern = escapeSchemaPattern(meta, schema);
         Set<String> procedureNames = new LinkedHashSet<>();
         try (ResultSet rs = meta.getProcedures(catalog, schemaPattern, "%")) {
             while (rs.next()) {
                 String name = rs.getString("PROCEDURE_NAME");
                 if (name != null && !name.trim().isEmpty()) {
                     procedureNames.add(name);
-                    result.add(new ObjectInfo(name, "PROCEDURE", schema, rs.getString("REMARKS")));
+                    result.add(new ObjectInfo(name, "PROCEDURE", schemaLabel, rs.getString("REMARKS")));
                 }
             }
         } catch (Exception | AbstractMethodError ignored) {
@@ -637,7 +641,7 @@ public final class StandardJdbcMetadata {
             while (rs.next()) {
                 String name = rs.getString("FUNCTION_NAME");
                 if (name != null && !name.trim().isEmpty() && !procedureNames.contains(name)) {
-                    result.add(new ObjectInfo(name, "FUNCTION", schema, rs.getString("REMARKS")));
+                    result.add(new ObjectInfo(name, "FUNCTION", schemaLabel, rs.getString("REMARKS")));
                 }
             }
         } catch (Exception | AbstractMethodError ignored) {
@@ -676,6 +680,38 @@ public final class StandardJdbcMetadata {
         return value == null || value.trim().isEmpty() ? null : value;
     }
 
+    /**
+     * 将 schema 名转义为可安全用作 {@link DatabaseMetaData#getTables(String, String, String, String[])}
+     * 等 schemaPattern 参数的形式。
+     *
+     * <p>JDBC 的 schemaPattern 把 {@code _}（匹配任意单字符）和 {@code %}（匹配任意字符序列）当作通配符。
+     * 当 schema 名本身含有这些字符时（例如 HANA 的 {@code _SYS_RT}、{@code _SYS_BIC}，或被引号引用的含
+     * {@code %} 的 schema），直接作为 schemaPattern 传入会误匹配到其他 schema 的对象。参考 DBeaver 的
+     * {@code JDBCUtils.escapeWildCards()}，按 {@link DatabaseMetaData#getSearchStringEscape()} 对通配符做转义。
+     *
+     * <p>当 schema 为空白（将映射为 {@code null}，表示不做 schema 过滤）或驱动未提供转义字符时，原样返回。
+     */
+    private static String escapeSchemaPattern(DatabaseMetaData meta, String schema) {
+        String normalized = blankToNull(schema);
+        if (normalized == null) {
+            return null;
+        }
+        String escape;
+        try {
+            escape = meta.getSearchStringEscape();
+        } catch (Exception ignored) {
+            escape = null;
+        }
+        if (escape == null || escape.isEmpty()) {
+            return normalized;
+        }
+        // 先转义 escape 自身，再转义 % 和 _，顺序与 PreparedStatement.setEscapeProcessing / DBeaver 一致。
+        String escapedEscape = normalized.replace(escape, escape + escape);
+        String escapedPercent = escapedEscape.replace("%", escape + "%");
+        String escapedUnderscore = escapedPercent.replace("_", escape + "_");
+        return escapedUnderscore;
+    }
+
     private static void addNonBlank(Set<String> values, String value) {
         if (value != null && !value.trim().isEmpty()) {
             values.add(value);