table row count in firebird

plugins/dbgate-plugin-firebird/src/backend/sql/tables.js

@@ -1,14 +1,45 @@
-module.exports = `SELECT
+module.exports = `
+WITH stats AS (
+  SELECT
+    r.rdb$relation_name                             AS rel_name,
+    /* Prefer PK stats; fall back to any unique active index */
+    COALESCE(
+      (SELECT i.rdb$statistics
+         FROM rdb$relation_constraints rc
+         JOIN rdb$indices i ON i.rdb$index_name = rc.rdb$index_name
+        WHERE rc.rdb$relation_name = r.rdb$relation_name
+          AND rc.rdb$constraint_type = 'PRIMARY KEY'),
+      (SELECT FIRST 1 i2.rdb$statistics
+         FROM rdb$indices i2
+        WHERE i2.rdb$relation_name = r.rdb$relation_name
+          AND i2.rdb$unique_flag = 1
+          AND i2.rdb$index_inactive = 0
+        ORDER BY i2.rdb$index_name)
+    ) AS stat
+  FROM rdb$relations r
+  WHERE COALESCE(r.rdb$system_flag, 0) = 0
+    AND COALESCE(r.rdb$relation_type, 0) = 0
+)
+SELECT
     TRIM(RDB$RELATION_NAME) AS "pureName",
     RDB$DESCRIPTION AS "objectComment",
-    RDB$FORMAT AS "objectTypeField"
+    RDB$FORMAT AS "objectTypeField",
+    
+    CAST(
+      CASE WHEN s.stat IS NOT NULL AND s.stat > 0
+           THEN 1.0 / s.stat
+           ELSE NULL
+      END AS BIGINT
+    )                         AS "tableRowCount"
+    
 FROM
-    RDB$RELATIONS
+    RDB$RELATIONS r
+    LEFT JOIN stats s ON s.rel_name = r.rdb$relation_name
 WHERE
-    RDB$SYSTEM_FLAG = 0 -- only user-defined tables
+    r.RDB$SYSTEM_FLAG = 0 -- only user-defined tables
 AND
-    RDB$RELATION_TYPE = 0 -- only tables (not views, etc.)
+    r.RDB$RELATION_TYPE = 0 -- only tables (not views, etc.)
 AND
-    ('tables:' || TRIM(RDB$RELATION_NAME)) =OBJECT_ID_CONDITION
+    ('tables:' || TRIM(r.RDB$RELATION_NAME)) =OBJECT_ID_CONDITION
 ORDER BY
     "pureName";`;