fixed loading constraints #734

plugins/dbgate-plugin-postgres/src/backend/sql/foreignKeys.js

@@ -0,0 +1,20 @@
+module.exports = `
+SELECT 
+    nsp.nspname AS table_schema,
+    rel.relname AS table_name,
+    con.conname AS constraint_name,
+    nsp2.nspname AS ref_table_schema,
+    rel2.relname AS ref_table_name,
+    conpk.conname AS unique_constraint_name
+FROM pg_constraint con
+JOIN pg_class rel ON rel.oid = con.conrelid
+JOIN pg_namespace nsp ON nsp.oid = rel.relnamespace
+JOIN pg_class rel2 ON rel2.oid = con.confrelid
+JOIN pg_namespace nsp2 ON nsp2.oid = rel2.relnamespace
+JOIN pg_constraint conpk 
+    ON conpk.conrelid = con.confrelid 
+   AND conpk.conkey = con.confkey
+   AND conpk.contype IN ('p','u')  -- 'p' = primary key, 'u' = unique constraint
+WHERE con.contype = 'f' AND ('tables:' || nsp.nspname || '.' || rel.relname) =OBJECT_ID_CONDITION AND nsp.nspname =SCHEMA_NAME_CONDITION
+;
+`;