feat: add ER diagram and enhance TableStructure with FK details, triggers, comments

- Add interactive ER diagram with ReactFlow + dagre auto-layout, accessible
  via right-click context menu on schema nodes in the sidebar
- Enhance TableStructure: column comments, FK referenced table/columns,
  ON UPDATE/DELETE rules, new Triggers tab
- Backend: rewrite get_table_constraints using pg_constraint for proper
  composite FK support, add get_table_triggers and get_schema_erd commands

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package-lock.json

@@ -15,10 +15,13 @@
         "@tauri-apps/api": "^2.10.1",
         "@tauri-apps/plugin-dialog": "^2.6.0",
         "@tauri-apps/plugin-shell": "^2.3.5",
+        "@types/dagre": "^0.7.53",
         "@uiw/react-codemirror": "^4.25.4",
+        "@xyflow/react": "^12.10.0",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
+        "dagre": "^0.8.5",
         "lucide-react": "^0.563.0",
         "next-themes": "^0.4.6",
         "radix-ui": "^1.4.3",
@@ -4469,6 +4472,61 @@
         "@babel/types": "^7.28.2"
       }
     },
+    "node_modules/@types/d3-color": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/@types/d3-color/-/d3-color-3.1.3.tgz",
+      "integrity": "sha512-iO90scth9WAbmgv7ogoq57O9YpKmFBbmoEoCHDB2xMBY0+/KVrqAaCDyCE16dUspeOvIxFFRI+0sEtqDqy2b4A==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-drag": {
+      "version": "3.0.7",
+      "resolved": "https://registry.npmjs.org/@types/d3-drag/-/d3-drag-3.0.7.tgz",
+      "integrity": "sha512-HE3jVKlzU9AaMazNufooRJ5ZpWmLIoc90A37WU2JMmeq28w1FQqCZswHZ3xR+SuxYftzHq6WU6KJHvqxKzTxxQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-selection": "*"
+      }
+    },
+    "node_modules/@types/d3-interpolate": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/@types/d3-interpolate/-/d3-interpolate-3.0.4.tgz",
+      "integrity": "sha512-mgLPETlrpVV1YRJIglr4Ez47g7Yxjl1lj7YKsiMCb27VJH9W8NVM6Bb9d8kkpG/uAQS5AmbA48q2IAolKKo1MA==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-color": "*"
+      }
+    },
+    "node_modules/@types/d3-selection": {
+      "version": "3.0.11",
+      "resolved": "https://registry.npmjs.org/@types/d3-selection/-/d3-selection-3.0.11.tgz",
+      "integrity": "sha512-bhAXu23DJWsrI45xafYpkQ4NtcKMwWnAC/vKrd2l+nxMFuvOT3XMYTIj2opv8vq8AO5Yh7Qac/nSeP/3zjTK0w==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-transition": {
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/@types/d3-transition/-/d3-transition-3.0.9.tgz",
+      "integrity": "sha512-uZS5shfxzO3rGlu0cC3bjmMFKsXv+SmZZcgp0KD22ts4uGXp5EVYGzu/0YdwZeKmddhcAccYtREJKkPfXkZuCg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-selection": "*"
+      }
+    },
+    "node_modules/@types/d3-zoom": {
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/@types/d3-zoom/-/d3-zoom-3.0.8.tgz",
+      "integrity": "sha512-iqMC4/YlFCSlO8+2Ii1GGGliCAY4XdeG748w5vQUbevlbDu0zSjH/+jojorQVBK/se0j6DUFNPBGSqD3YWYnDw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-interpolate": "*",
+        "@types/d3-selection": "*"
+      }
+    },
+    "node_modules/@types/dagre": {
+      "version": "0.7.53",
+      "resolved": "https://registry.npmjs.org/@types/dagre/-/dagre-0.7.53.tgz",
+      "integrity": "sha512-f4gkWqzPZvYmKhOsDnhq/R8mO4UMcKdxZo+i5SCkOU1wvGeHJeUXGIHeE9pnwGyPMDof1Vx5ZQo4nxpeg2TTVQ==",
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -4874,6 +4932,66 @@
         "vite": "^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
       }
     },
+    "node_modules/@xyflow/react": {
+      "version": "12.10.0",
+      "resolved": "https://registry.npmjs.org/@xyflow/react/-/react-12.10.0.tgz",
+      "integrity": "sha512-eOtz3whDMWrB4KWVatIBrKuxECHqip6PfA8fTpaS2RUGVpiEAe+nqDKsLqkViVWxDGreq0lWX71Xth/SPAzXiw==",
+      "license": "MIT",
+      "dependencies": {
+        "@xyflow/system": "0.0.74",
+        "classcat": "^5.0.3",
+        "zustand": "^4.4.0"
+      },
+      "peerDependencies": {
+        "react": ">=17",
+        "react-dom": ">=17"
+      }
+    },
+    "node_modules/@xyflow/react/node_modules/zustand": {
+      "version": "4.5.7",
+      "resolved": "https://registry.npmjs.org/zustand/-/zustand-4.5.7.tgz",
+      "integrity": "sha512-CHOUy7mu3lbD6o6LJLfllpjkzhHXSBlX8B9+qPddUsIfeF5S/UZ5q0kmCsnRqT1UHFQZchNFDDzMbQsuesHWlw==",
+      "license": "MIT",
+      "dependencies": {
+        "use-sync-external-store": "^1.2.2"
+      },
+      "engines": {
+        "node": ">=12.7.0"
+      },
+      "peerDependencies": {
+        "@types/react": ">=16.8",
+        "immer": ">=9.0.6",
+        "react": ">=16.8"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "immer": {
+          "optional": true
+        },
+        "react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@xyflow/system": {
+      "version": "0.0.74",
+      "resolved": "https://registry.npmjs.org/@xyflow/system/-/system-0.0.74.tgz",
+      "integrity": "sha512-7v7B/PkiVrkdZzSbL+inGAo6tkR/WQHHG0/jhSvLQToCsfa8YubOGmBYd1s08tpKpihdHDZFwzQZeR69QSBb4Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-drag": "^3.0.7",
+        "@types/d3-interpolate": "^3.0.4",
+        "@types/d3-selection": "^3.0.10",
+        "@types/d3-transition": "^3.0.8",
+        "@types/d3-zoom": "^3.0.8",
+        "d3-drag": "^3.0.0",
+        "d3-interpolate": "^3.0.1",
+        "d3-selection": "^3.0.0",
+        "d3-zoom": "^3.0.0"
+      }
+    },
     "node_modules/accepts": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz",
@@ -5269,6 +5387,12 @@
         "url": "https://polar.sh/cva"
       }
     },
+    "node_modules/classcat": {
+      "version": "5.0.5",
+      "resolved": "https://registry.npmjs.org/classcat/-/classcat-5.0.5.tgz",
+      "integrity": "sha512-JhZUT7JFcQy/EzW605k/ktHtncoo9vnyW/2GspNYwFlN1C/WmjuV/xtS04e9SOkL2sTdw0VAZ2UGCcQ9lR6p6w==",
+      "license": "MIT"
+    },
     "node_modules/cli-cursor": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-5.0.0.tgz",
@@ -5607,6 +5731,122 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/d3-color": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-3.1.0.tgz",
+      "integrity": "sha512-zg/chbXyeBtMQ1LbD/WSoW2DpC3I0mpmPdW+ynRTj/x2DAWYrIY7qeZIHidozwV24m4iavr15lNwIwLxRmOxhA==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-dispatch": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-dispatch/-/d3-dispatch-3.0.1.tgz",
+      "integrity": "sha512-rzUyPU/S7rwUflMyLc1ETDeBj0NRuHKKAcvukozwhshr6g6c5d8zh4c2gQjY2bZ0dXeGLWc1PF174P2tVvKhfg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-drag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-drag/-/d3-drag-3.0.0.tgz",
+      "integrity": "sha512-pWbUJLdETVA8lQNJecMxoXfH6x+mO2UQo8rSmZ+QqxcbyA3hfeprFgIT//HW2nlHChWeIIMwS2Fq+gEARkhTkg==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-dispatch": "1 - 3",
+        "d3-selection": "3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-ease": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-ease/-/d3-ease-3.0.1.tgz",
+      "integrity": "sha512-wR/XK3D3XcLIZwpbvQwQ5fK+8Ykds1ip7A2Txe0yxncXSdq1L9skcG7blcedkOX+ZcgxGAmLX1FrRGbADwzi0w==",
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-interpolate": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-interpolate/-/d3-interpolate-3.0.1.tgz",
+      "integrity": "sha512-3bYs1rOD33uo8aqJfKP3JWPAibgw8Zm2+L9vBKEHJ2Rg+viTR7o5Mmv5mZcieN+FRYaAOWX5SJATX6k1PWz72g==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-color": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-selection": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-selection/-/d3-selection-3.0.0.tgz",
+      "integrity": "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ==",
+      "license": "ISC",
+      "peer": true,
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-timer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-timer/-/d3-timer-3.0.1.tgz",
+      "integrity": "sha512-ndfJ/JxxMd3nw31uyKoY2naivF+r29V+Lc0svZxe1JvvIRmi8hUsrMvdOwgS1o6uBHmiz91geQ0ylPP0aj1VUA==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-transition": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-transition/-/d3-transition-3.0.1.tgz",
+      "integrity": "sha512-ApKvfjsSR6tg06xrL434C0WydLr7JewBB3V+/39RMHsaXTOG0zmt/OAXeng5M5LBm0ojmxJrpomQVZ1aPvBL4w==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-color": "1 - 3",
+        "d3-dispatch": "1 - 3",
+        "d3-ease": "1 - 3",
+        "d3-interpolate": "1 - 3",
+        "d3-timer": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "peerDependencies": {
+        "d3-selection": "2 - 3"
+      }
+    },
+    "node_modules/d3-zoom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-zoom/-/d3-zoom-3.0.0.tgz",
+      "integrity": "sha512-b8AmV3kfQaqWAuacbPuNbL6vahnOJflOhexLzMMNLga62+/nh0JzvJ0aO/5a5MVgUFGS7Hu1P9P03o3fJkDCyw==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-dispatch": "1 - 3",
+        "d3-drag": "2 - 3",
+        "d3-interpolate": "1 - 3",
+        "d3-selection": "2 - 3",
+        "d3-transition": "2 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/dagre": {
+      "version": "0.8.5",
+      "resolved": "https://registry.npmjs.org/dagre/-/dagre-0.8.5.tgz",
+      "integrity": "sha512-/aTqmnRta7x7MCCpExk7HQL2O4owCT2h8NT//9I1OQ9vt29Pa0BzSAkR5lwFUcQ7491yVi/3CXU9jQ5o0Mn2Sw==",
+      "license": "MIT",
+      "dependencies": {
+        "graphlib": "^2.1.8",
+        "lodash": "^4.17.15"
+      }
+    },
     "node_modules/data-uri-to-buffer": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.1.tgz",
@@ -6757,6 +6997,15 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/graphlib": {
+      "version": "2.1.8",
+      "resolved": "https://registry.npmjs.org/graphlib/-/graphlib-2.1.8.tgz",
+      "integrity": "sha512-jcLLfkpoVGmH7/InMC/1hIvOPSUh38oJtGhvrOFGzioE1DZ+0YW16RgmOJhHiuWTvGiJQ9Z1Ik43JvkRPRvE+A==",
+      "license": "MIT",
+      "dependencies": {
+        "lodash": "^4.17.15"
+      }
+    },
     "node_modules/graphql": {
       "version": "16.12.0",
       "resolved": "https://registry.npmjs.org/graphql/-/graphql-16.12.0.tgz",
@@ -7609,6 +7858,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/lodash": {
+      "version": "4.17.23",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
+      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
+      "license": "MIT"
+    },
     "node_modules/lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",

package.json

@@ -18,10 +18,13 @@
     "@tauri-apps/api": "^2.10.1",
     "@tauri-apps/plugin-dialog": "^2.6.0",
     "@tauri-apps/plugin-shell": "^2.3.5",
+    "@types/dagre": "^0.7.53",
     "@uiw/react-codemirror": "^4.25.4",
+    "@xyflow/react": "^12.10.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
+    "dagre": "^0.8.5",
     "lucide-react": "^0.563.0",
     "next-themes": "^0.4.6",
     "radix-ui": "^1.4.3",

src-tauri/src/commands/schema.rs

@@ -1,5 +1,8 @@
 use crate::error::{TuskError, TuskResult};
-use crate::models::schema::{ColumnDetail, ColumnInfo, ConstraintInfo, IndexInfo, SchemaObject};
+use crate::models::schema::{
+    ColumnDetail, ColumnInfo, ConstraintInfo, ErdColumn, ErdData, ErdRelationship, ErdTable,
+    IndexInfo, SchemaObject, TriggerInfo,
+};
 use crate::state::{AppState, DbFlavor};
 use sqlx::Row;
 use std::collections::HashMap;
@@ -271,7 +274,13 @@ pub async fn get_table_columns_core(
                     AND tc.table_name = $2 \
                     AND kcu.column_name = c.column_name \
                 LIMIT 1 \
-            ), false) as is_pk \
+            ), false) as is_pk, \
+            col_description( \
+                (SELECT oid FROM pg_class \
+                 JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace \
+                 WHERE relname = $2 AND nspname = $1), \
+                c.ordinal_position \
+            ) as col_comment \
          FROM information_schema.columns c \
          WHERE c.table_schema = $1 AND c.table_name = $2 \
          ORDER BY c.ordinal_position",
@@ -292,6 +301,7 @@ pub async fn get_table_columns_core(
             ordinal_position: r.get::<i32, _>(4),
             character_maximum_length: r.get::<Option<i32>, _>(5),
             is_primary_key: r.get::<bool, _>(6),
+            comment: r.get::<Option<String>, _>(7),
         })
         .collect())
 }
@@ -320,16 +330,49 @@ pub async fn get_table_constraints(
 
     let rows = sqlx::query(
         "SELECT \
-            tc.constraint_name, \
+            c.conname AS constraint_name, \
-            tc.constraint_type, \
+            CASE c.contype \
-            array_agg(kcu.column_name ORDER BY kcu.ordinal_position)::text[] as columns \
+                WHEN 'p' THEN 'PRIMARY KEY' \
-         FROM information_schema.table_constraints tc \
+                WHEN 'f' THEN 'FOREIGN KEY' \
-         JOIN information_schema.key_column_usage kcu \
+                WHEN 'u' THEN 'UNIQUE' \
-            ON tc.constraint_name = kcu.constraint_name \
+                WHEN 'c' THEN 'CHECK' \
-            AND tc.table_schema = kcu.table_schema \
+                WHEN 'x' THEN 'EXCLUDE' \
-         WHERE tc.table_schema = $1 AND tc.table_name = $2 \
+            END AS constraint_type, \
-         GROUP BY tc.constraint_name, tc.constraint_type \
+            ARRAY( \
-         ORDER BY tc.constraint_type, tc.constraint_name",
+                SELECT a.attname FROM unnest(c.conkey) WITH ORDINALITY AS k(attnum, ord) \
+                JOIN pg_attribute a ON a.attrelid = c.conrelid AND a.attnum = k.attnum \
+                ORDER BY k.ord \
+            )::text[] AS columns, \
+            ref_ns.nspname AS referenced_schema, \
+            ref_cl.relname AS referenced_table, \
+            CASE WHEN c.confrelid > 0 THEN ARRAY( \
+                SELECT a.attname FROM unnest(c.confkey) WITH ORDINALITY AS k(attnum, ord) \
+                JOIN pg_attribute a ON a.attrelid = c.confrelid AND a.attnum = k.attnum \
+                ORDER BY k.ord \
+            )::text[] ELSE NULL END AS referenced_columns, \
+            CASE c.confupdtype \
+                WHEN 'a' THEN 'NO ACTION' \
+                WHEN 'r' THEN 'RESTRICT' \
+                WHEN 'c' THEN 'CASCADE' \
+                WHEN 'n' THEN 'SET NULL' \
+                WHEN 'd' THEN 'SET DEFAULT' \
+                ELSE NULL \
+            END AS update_rule, \
+            CASE c.confdeltype \
+                WHEN 'a' THEN 'NO ACTION' \
+                WHEN 'r' THEN 'RESTRICT' \
+                WHEN 'c' THEN 'CASCADE' \
+                WHEN 'n' THEN 'SET NULL' \
+                WHEN 'd' THEN 'SET DEFAULT' \
+                ELSE NULL \
+            END AS delete_rule \
+         FROM pg_constraint c \
+         JOIN pg_class cl ON cl.oid = c.conrelid \
+         JOIN pg_namespace ns ON ns.oid = cl.relnamespace \
+         LEFT JOIN pg_class ref_cl ON ref_cl.oid = c.confrelid \
+         LEFT JOIN pg_namespace ref_ns ON ref_ns.oid = ref_cl.relnamespace \
+         WHERE ns.nspname = $1 AND cl.relname = $2 \
+         ORDER BY c.contype, c.conname",
     )
     .bind(&schema)
     .bind(&table)
@@ -343,6 +386,11 @@ pub async fn get_table_constraints(
             name: r.get::<String, _>(0),
             constraint_type: r.get::<String, _>(1),
             columns: r.get::<Vec<String>, _>(2),
+            referenced_schema: r.get::<Option<String>, _>(3),
+            referenced_table: r.get::<Option<String>, _>(4),
+            referenced_columns: r.get::<Option<Vec<String>>, _>(5),
+            update_rule: r.get::<Option<String>, _>(6),
+            delete_rule: r.get::<Option<String>, _>(7),
         })
         .collect())
 }
@@ -483,3 +531,186 @@ pub async fn get_column_details(
         })
         .collect())
 }
+
+#[tauri::command]
+pub async fn get_table_triggers(
+    state: State<'_, Arc<AppState>>,
+    connection_id: String,
+    schema: String,
+    table: String,
+) -> TuskResult<Vec<TriggerInfo>> {
+    let pools = state.pools.read().await;
+    let pool = pools
+        .get(&connection_id)
+        .ok_or(TuskError::NotConnected(connection_id))?;
+
+    let rows = sqlx::query(
+        "SELECT \
+            t.tgname AS trigger_name, \
+            CASE \
+                WHEN t.tgtype::int & 2 = 2 THEN 'BEFORE' \
+                WHEN t.tgtype::int & 2 = 0 AND t.tgtype::int & 64 = 64 THEN 'INSTEAD OF' \
+                ELSE 'AFTER' \
+            END AS timing, \
+            array_to_string(ARRAY[ \
+                CASE WHEN t.tgtype::int & 4 = 4 THEN 'INSERT' ELSE NULL END, \
+                CASE WHEN t.tgtype::int & 8 = 8 THEN 'DELETE' ELSE NULL END, \
+                CASE WHEN t.tgtype::int & 16 = 16 THEN 'UPDATE' ELSE NULL END, \
+                CASE WHEN t.tgtype::int & 32 = 32 THEN 'TRUNCATE' ELSE NULL END \
+            ], ' OR ') AS event, \
+            CASE WHEN t.tgtype::int & 1 = 1 THEN 'ROW' ELSE 'STATEMENT' END AS orientation, \
+            p.proname AS function_name, \
+            t.tgenabled != 'D' AS is_enabled, \
+            pg_get_triggerdef(t.oid) AS definition \
+         FROM pg_trigger t \
+         JOIN pg_class c ON c.oid = t.tgrelid \
+         JOIN pg_namespace n ON n.oid = c.relnamespace \
+         JOIN pg_proc p ON p.oid = t.tgfoid \
+         WHERE n.nspname = $1 AND c.relname = $2 AND NOT t.tgisinternal \
+         ORDER BY t.tgname",
+    )
+    .bind(&schema)
+    .bind(&table)
+    .fetch_all(pool)
+    .await
+    .map_err(TuskError::Database)?;
+
+    Ok(rows
+        .iter()
+        .map(|r| TriggerInfo {
+            name: r.get::<String, _>(0),
+            timing: r.get::<String, _>(1),
+            event: r.get::<String, _>(2),
+            orientation: r.get::<String, _>(3),
+            function_name: r.get::<String, _>(4),
+            is_enabled: r.get::<bool, _>(5),
+            definition: r.get::<String, _>(6),
+        })
+        .collect())
+}
+
+#[tauri::command]
+pub async fn get_schema_erd(
+    state: State<'_, Arc<AppState>>,
+    connection_id: String,
+    schema: String,
+) -> TuskResult<ErdData> {
+    let pools = state.pools.read().await;
+    let pool = pools
+        .get(&connection_id)
+        .ok_or(TuskError::NotConnected(connection_id))?;
+
+    // Get all tables with columns
+    let col_rows = sqlx::query(
+        "SELECT \
+            c.table_name, \
+            c.column_name, \
+            c.data_type, \
+            c.is_nullable = 'YES' AS is_nullable, \
+            COALESCE(( \
+                SELECT true FROM pg_constraint con \
+                JOIN pg_class cl ON cl.oid = con.conrelid \
+                JOIN pg_namespace ns ON ns.oid = cl.relnamespace \
+                WHERE con.contype = 'p' \
+                    AND ns.nspname = $1 AND cl.relname = c.table_name \
+                    AND EXISTS ( \
+                        SELECT 1 FROM unnest(con.conkey) k \
+                        JOIN pg_attribute a ON a.attrelid = con.conrelid AND a.attnum = k \
+                        WHERE a.attname = c.column_name \
+                    ) \
+                LIMIT 1 \
+            ), false) AS is_pk \
+         FROM information_schema.columns c \
+         JOIN information_schema.tables t \
+            ON t.table_schema = c.table_schema AND t.table_name = c.table_name \
+         WHERE c.table_schema = $1 AND t.table_type = 'BASE TABLE' \
+         ORDER BY c.table_name, c.ordinal_position",
+    )
+    .bind(&schema)
+    .fetch_all(pool)
+    .await
+    .map_err(TuskError::Database)?;
+
+    // Build tables map
+    let mut tables_map: HashMap<String, ErdTable> = HashMap::new();
+    for row in &col_rows {
+        let table_name: String = row.get(0);
+        let entry = tables_map.entry(table_name.clone()).or_insert_with(|| ErdTable {
+            schema: schema.clone(),
+            name: table_name,
+            columns: Vec::new(),
+        });
+        entry.columns.push(ErdColumn {
+            name: row.get(1),
+            data_type: row.get(2),
+            is_nullable: row.get(3),
+            is_primary_key: row.get(4),
+        });
+    }
+    let tables: Vec<ErdTable> = tables_map.into_values().collect();
+
+    // Get all FK relationships
+    let fk_rows = sqlx::query(
+        "SELECT \
+            c.conname AS constraint_name, \
+            src_ns.nspname AS source_schema, \
+            src_cl.relname AS source_table, \
+            ARRAY( \
+                SELECT a.attname FROM unnest(c.conkey) WITH ORDINALITY AS k(attnum, ord) \
+                JOIN pg_attribute a ON a.attrelid = c.conrelid AND a.attnum = k.attnum \
+                ORDER BY k.ord \
+            )::text[] AS source_columns, \
+            ref_ns.nspname AS target_schema, \
+            ref_cl.relname AS target_table, \
+            ARRAY( \
+                SELECT a.attname FROM unnest(c.confkey) WITH ORDINALITY AS k(attnum, ord) \
+                JOIN pg_attribute a ON a.attrelid = c.confrelid AND a.attnum = k.attnum \
+                ORDER BY k.ord \
+            )::text[] AS target_columns, \
+            CASE c.confupdtype \
+                WHEN 'a' THEN 'NO ACTION' \
+                WHEN 'r' THEN 'RESTRICT' \
+                WHEN 'c' THEN 'CASCADE' \
+                WHEN 'n' THEN 'SET NULL' \
+                WHEN 'd' THEN 'SET DEFAULT' \
+            END AS update_rule, \
+            CASE c.confdeltype \
+                WHEN 'a' THEN 'NO ACTION' \
+                WHEN 'r' THEN 'RESTRICT' \
+                WHEN 'c' THEN 'CASCADE' \
+                WHEN 'n' THEN 'SET NULL' \
+                WHEN 'd' THEN 'SET DEFAULT' \
+            END AS delete_rule \
+         FROM pg_constraint c \
+         JOIN pg_class src_cl ON src_cl.oid = c.conrelid \
+         JOIN pg_namespace src_ns ON src_ns.oid = src_cl.relnamespace \
+         JOIN pg_class ref_cl ON ref_cl.oid = c.confrelid \
+         JOIN pg_namespace ref_ns ON ref_ns.oid = ref_cl.relnamespace \
+         WHERE c.contype = 'f' AND src_ns.nspname = $1 \
+         ORDER BY c.conname",
+    )
+    .bind(&schema)
+    .fetch_all(pool)
+    .await
+    .map_err(TuskError::Database)?;
+
+    let relationships: Vec<ErdRelationship> = fk_rows
+        .iter()
+        .map(|r| ErdRelationship {
+            constraint_name: r.get(0),
+            source_schema: r.get(1),
+            source_table: r.get(2),
+            source_columns: r.get(3),
+            target_schema: r.get(4),
+            target_table: r.get(5),
+            target_columns: r.get(6),
+            update_rule: r.get(7),
+            delete_rule: r.get(8),
+        })
+        .collect();
+
+    Ok(ErdData {
+        tables,
+        relationships,
+    })
+}

src-tauri/src/lib.rs

@@ -59,6 +59,8 @@ pub fn run() {
             commands::schema::get_table_indexes,
             commands::schema::get_completion_schema,
             commands::schema::get_column_details,
+            commands::schema::get_table_triggers,
+            commands::schema::get_schema_erd,
             // data
             commands::data::get_table_data,
             commands::data::update_row,

src-tauri/src/models/schema.rs

@@ -18,6 +18,7 @@ pub struct ColumnInfo {
     pub ordinal_position: i32,
     pub character_maximum_length: Option<i32>,
     pub is_primary_key: bool,
+    pub comment: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -34,6 +35,11 @@ pub struct ConstraintInfo {
     pub name: String,
     pub constraint_type: String,
     pub columns: Vec<String>,
+    pub referenced_schema: Option<String>,
+    pub referenced_table: Option<String>,
+    pub referenced_columns: Option<Vec<String>>,
+    pub update_rule: Option<String>,
+    pub delete_rule: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -43,3 +49,48 @@ pub struct IndexInfo {
     pub is_unique: bool,
     pub is_primary: bool,
 }
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TriggerInfo {
+    pub name: String,
+    pub event: String,
+    pub timing: String,
+    pub orientation: String,
+    pub function_name: String,
+    pub is_enabled: bool,
+    pub definition: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ErdColumn {
+    pub name: String,
+    pub data_type: String,
+    pub is_nullable: bool,
+    pub is_primary_key: bool,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ErdTable {
+    pub schema: String,
+    pub name: String,
+    pub columns: Vec<ErdColumn>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ErdRelationship {
+    pub constraint_name: String,
+    pub source_schema: String,
+    pub source_table: String,
+    pub source_columns: Vec<String>,
+    pub target_schema: String,
+    pub target_table: String,
+    pub target_columns: Vec<String>,
+    pub update_rule: String,
+    pub delete_rule: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ErdData {
+    pub tables: Vec<ErdTable>,
+    pub relationships: Vec<ErdRelationship>,
+}

src/components/erd/ErdDiagram.tsx

@@ -0,0 +1,186 @@
+import { useMemo, useCallback, useEffect, useState } from "react";
+import {
+  ReactFlow,
+  Background,
+  Controls,
+  MiniMap,
+  MarkerType,
+  PanOnScrollMode,
+  applyNodeChanges,
+  applyEdgeChanges,
+  type Node,
+  type Edge,
+  type NodeTypes,
+  type NodeChange,
+  type EdgeChange,
+} from "@xyflow/react";
+import dagre from "dagre";
+import "@xyflow/react/dist/style.css";
+
+import { useSchemaErd } from "@/hooks/use-schema";
+import { ErdTableNode, type ErdTableNodeData } from "./ErdTableNode";
+import type { ErdData } from "@/types";
+
+const nodeTypes: NodeTypes = {
+  erdTable: ErdTableNode,
+};
+
+const NODE_WIDTH = 250;
+const NODE_ROW_HEIGHT = 24;
+const NODE_HEADER_HEIGHT = 36;
+
+function buildLayout(data: ErdData): { nodes: Node[]; edges: Edge[] } {
+  const g = new dagre.graphlib.Graph();
+  g.setDefaultEdgeLabel(() => ({}));
+  g.setGraph({ rankdir: "LR", nodesep: 60, ranksep: 150 });
+
+  // Build list of FK column names per table for icon display
+  const fkColumnsPerTable = new Map<string, string[]>();
+  for (const rel of data.relationships) {
+    const key = `${rel.source_schema}.${rel.source_table}`;
+    if (!fkColumnsPerTable.has(key)) fkColumnsPerTable.set(key, []);
+    for (const col of rel.source_columns) {
+      const arr = fkColumnsPerTable.get(key)!;
+      if (!arr.includes(col)) arr.push(col);
+    }
+  }
+
+  for (const table of data.tables) {
+    const height = NODE_HEADER_HEIGHT + table.columns.length * NODE_ROW_HEIGHT;
+    g.setNode(table.name, { width: NODE_WIDTH, height });
+  }
+
+  for (const rel of data.relationships) {
+    g.setEdge(rel.source_table, rel.target_table);
+  }
+
+  dagre.layout(g);
+
+  const nodes: Node[] = data.tables.map((table) => {
+    const pos = g.node(table.name);
+    const tableKey = `${table.schema}.${table.name}`;
+    return {
+      id: table.name,
+      type: "erdTable",
+      position: { x: pos.x - NODE_WIDTH / 2, y: pos.y - pos.height / 2 },
+      data: {
+        label: table.name,
+        schema: table.schema,
+        columns: table.columns,
+        fkColumnNames: fkColumnsPerTable.get(tableKey) ?? [],
+      } satisfies ErdTableNodeData,
+    };
+  });
+
+  const edges: Edge[] = data.relationships.map((rel) => ({
+    id: rel.constraint_name,
+    source: rel.source_table,
+    target: rel.target_table,
+    type: "smoothstep",
+    label: rel.constraint_name,
+    labelStyle: { fontSize: 10, fill: "var(--muted-foreground)" },
+    labelBgStyle: { fill: "var(--card)", fillOpacity: 0.8 },
+    labelBgPadding: [4, 2] as [number, number],
+    markerEnd: {
+      type: MarkerType.ArrowClosed,
+      width: 16,
+      height: 16,
+      color: "var(--muted-foreground)",
+    },
+    style: { stroke: "var(--muted-foreground)", strokeWidth: 1.5 },
+  }));
+
+  return { nodes, edges };
+}
+
+interface Props {
+  connectionId: string;
+  schema: string;
+}
+
+export function ErdDiagram({ connectionId, schema }: Props) {
+  const { data: erdData, isLoading, error } = useSchemaErd(connectionId, schema);
+
+  const layout = useMemo(() => {
+    if (!erdData) return null;
+    return buildLayout(erdData);
+  }, [erdData]);
+
+  const [nodes, setNodes] = useState<Node[]>([]);
+  const [edges, setEdges] = useState<Edge[]>([]);
+
+  useEffect(() => {
+    if (layout) {
+      setNodes(layout.nodes);
+      setEdges(layout.edges);
+    }
+  }, [layout]);
+
+  const onNodesChange = useCallback(
+    (changes: NodeChange[]) => setNodes((nds) => applyNodeChanges(changes, nds)),
+    [],
+  );
+
+  const onEdgesChange = useCallback(
+    (changes: EdgeChange[]) => setEdges((eds) => applyEdgeChanges(changes, eds)),
+    [],
+  );
+
+  const onInit = useCallback((instance: { fitView: () => void }) => {
+    setTimeout(() => instance.fitView(), 50);
+  }, []);
+
+  if (isLoading) {
+    return (
+      <div className="flex h-full items-center justify-center text-sm text-muted-foreground">
+        Loading ER diagram...
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="flex h-full items-center justify-center text-sm text-destructive">
+        Error loading ER diagram: {String(error)}
+      </div>
+    );
+  }
+
+  if (!erdData || erdData.tables.length === 0) {
+    return (
+      <div className="flex h-full items-center justify-center text-sm text-muted-foreground">
+        No tables found in schema &quot;{schema}&quot;.
+      </div>
+    );
+  }
+
+  return (
+    <div className="h-full w-full">
+      <ReactFlow
+        nodes={nodes}
+        edges={edges}
+        onNodesChange={onNodesChange}
+        onEdgesChange={onEdgesChange}
+        nodeTypes={nodeTypes}
+        onInit={onInit}
+        fitView
+        colorMode="dark"
+        minZoom={0.05}
+        maxZoom={3}
+        zoomOnScroll
+        zoomOnPinch
+        panOnScroll
+        panOnScrollMode={PanOnScrollMode.Free}
+        proOptions={{ hideAttribution: true }}
+      >
+        <Background gap={16} size={1} />
+        <Controls className="!bg-card !border !shadow-sm [&>button]:!bg-card [&>button]:!border-border [&>button]:!text-foreground" />
+        <MiniMap
+          className="!bg-card !border"
+          nodeColor="var(--muted)"
+          maskColor="rgba(0, 0, 0, 0.7)"
+        />
+      </ReactFlow>
+    </div>
+  );
+}

src/components/erd/ErdTableNode.tsx

@@ -0,0 +1,54 @@
+import { memo } from "react";
+import { Handle, Position, type NodeProps } from "@xyflow/react";
+import type { ErdColumn } from "@/types";
+import { KeyRound, Link } from "lucide-react";
+
+export interface ErdTableNodeData {
+  label: string;
+  schema: string;
+  columns: ErdColumn[];
+  fkColumnNames: string[];
+  [key: string]: unknown;
+}
+
+function ErdTableNodeComponent({ data }: NodeProps) {
+  const { label, columns, fkColumnNames } = data as unknown as ErdTableNodeData;
+
+  return (
+    <div className="min-w-[220px] rounded-lg border border-border bg-card text-card-foreground shadow-md">
+      <div className="rounded-t-lg border-b bg-primary/10 px-3 py-2 text-xs font-bold tracking-wide text-primary">
+        {label}
+      </div>
+      <div className="divide-y divide-border/50">
+        {(columns as ErdColumn[]).map((col, i) => (
+          <div key={i} className="flex items-center gap-1.5 px-3 py-1 text-[11px]">
+            {col.is_primary_key ? (
+              <KeyRound className="h-3 w-3 shrink-0 text-amber-500" />
+            ) : (fkColumnNames as string[]).includes(col.name) ? (
+              <Link className="h-3 w-3 shrink-0 text-blue-400" />
+            ) : (
+              <span className="h-3 w-3 shrink-0" />
+            )}
+            <span className="font-medium">{col.name}</span>
+            <span className="ml-auto text-muted-foreground">{col.data_type}</span>
+            {col.is_nullable && (
+              <span className="text-muted-foreground/60">?</span>
+            )}
+          </div>
+        ))}
+      </div>
+      <Handle
+        type="target"
+        position={Position.Left}
+        className="!w-1.5 !h-1.5 !bg-primary !opacity-0 hover:!opacity-100 !border-none !min-w-0 !min-h-0"
+      />
+      <Handle
+        type="source"
+        position={Position.Right}
+        className="!w-1.5 !h-1.5 !bg-primary !opacity-0 hover:!opacity-100 !border-none !min-w-0 !min-h-0"
+      />
+    </div>
+  );
+}
+
+export const ErdTableNode = memo(ErdTableNodeComponent);

src/components/layout/TabBar.tsx

@@ -1,7 +1,7 @@
 import { useAppStore } from "@/stores/app-store";
 import { useConnections } from "@/hooks/use-connections";
 import { ScrollArea } from "@/components/ui/scroll-area";
-import { X, Table2, Code, Columns, Users, Activity, Search } from "lucide-react";
+import { X, Table2, Code, Columns, Users, Activity, Search, GitFork } from "lucide-react";
 
 export function TabBar() {
   const { tabs, activeTabId, setActiveTabId, closeTab } = useAppStore();
@@ -16,6 +16,7 @@ export function TabBar() {
     roles: <Users className="h-3 w-3" />,
     sessions: <Activity className="h-3 w-3" />,
     lookup: <Search className="h-3 w-3" />,
+    erd: <GitFork className="h-3 w-3" />,
   };
 
   return (

src/components/schema/SchemaTree.tsx

@@ -136,6 +136,17 @@ export function SchemaTree() {
             };
             addTab(tab);
           }}
+          onViewErd={(schema) => {
+            const tab: Tab = {
+              id: crypto.randomUUID(),
+              type: "erd",
+              title: `${schema} (ER Diagram)`,
+              connectionId: activeConnectionId,
+              database: currentDatabase ?? undefined,
+              schema,
+            };
+            addTab(tab);
+          }}
         />
       ))}
     </div>
@@ -150,6 +161,7 @@ function DatabaseNode({
   isSwitching,
   onOpenTable,
   onViewStructure,
+  onViewErd,
 }: {
   name: string;
   isActive: boolean;
@@ -158,6 +170,7 @@ function DatabaseNode({
   isSwitching: boolean;
   onOpenTable: (schema: string, table: string) => void;
   onViewStructure: (schema: string, table: string) => void;
+  onViewErd: (schema: string) => void;
 }) {
   const [expanded, setExpanded] = useState(false);
   const readOnlyMap = useAppStore((s) => s.readOnlyMap);
@@ -234,6 +247,7 @@ function DatabaseNode({
             connectionId={connectionId}
             onOpenTable={onOpenTable}
             onViewStructure={onViewStructure}
+            onViewErd={onViewErd}
           />
         </div>
       )}
@@ -250,10 +264,12 @@ function SchemasForCurrentDb({
   connectionId,
   onOpenTable,
   onViewStructure,
+  onViewErd,
 }: {
   connectionId: string;
   onOpenTable: (schema: string, table: string) => void;
   onViewStructure: (schema: string, table: string) => void;
+  onViewErd: (schema: string) => void;
 }) {
   const { data: schemas } = useSchemas(connectionId);
 
@@ -272,6 +288,7 @@ function SchemasForCurrentDb({
           connectionId={connectionId}
           onOpenTable={(table) => onOpenTable(schema, table)}
           onViewStructure={(table) => onViewStructure(schema, table)}
+          onViewErd={() => onViewErd(schema)}
         />
       ))}
     </>
@@ -283,32 +300,43 @@ function SchemaNode({
   connectionId,
   onOpenTable,
   onViewStructure,
+  onViewErd,
 }: {
   schema: string;
   connectionId: string;
   onOpenTable: (table: string) => void;
   onViewStructure: (table: string) => void;
+  onViewErd: () => void;
 }) {
   const [expanded, setExpanded] = useState(false);
 
   return (
     <div>
-      <div
+      <ContextMenu>
-        className="flex items-center gap-1 rounded-sm px-1 py-0.5 text-sm hover:bg-accent cursor-pointer select-none font-medium"
+        <ContextMenuTrigger>
-        onClick={() => setExpanded(!expanded)}
+          <div
-      >
+            className="flex items-center gap-1 rounded-sm px-1 py-0.5 text-sm hover:bg-accent cursor-pointer select-none font-medium"
-        {expanded ? (
+            onClick={() => setExpanded(!expanded)}
-          <ChevronDown className="h-3.5 w-3.5 text-muted-foreground" />
+          >
-        ) : (
+            {expanded ? (
-          <ChevronRight className="h-3.5 w-3.5 text-muted-foreground" />
+              <ChevronDown className="h-3.5 w-3.5 text-muted-foreground" />
-        )}
+            ) : (
-        {expanded ? (
+              <ChevronRight className="h-3.5 w-3.5 text-muted-foreground" />
-          <FolderOpen className="h-3.5 w-3.5 text-muted-foreground" />
+            )}
-        ) : (
+            {expanded ? (
-          <Database className="h-3.5 w-3.5 text-muted-foreground" />
+              <FolderOpen className="h-3.5 w-3.5 text-muted-foreground" />
-        )}
+            ) : (
-        <span>{schema}</span>
+              <Database className="h-3.5 w-3.5 text-muted-foreground" />
-      </div>
+            )}
+            <span>{schema}</span>
+          </div>
+        </ContextMenuTrigger>
+        <ContextMenuContent>
+          <ContextMenuItem onClick={onViewErd}>
+            View ER Diagram
+          </ContextMenuItem>
+        </ContextMenuContent>
+      </ContextMenu>
       {expanded && (
         <div className="ml-4">
           <CategoryNode

src/components/table-viewer/TableStructure.tsx

@@ -3,6 +3,7 @@ import {
   getTableColumns,
   getTableConstraints,
   getTableIndexes,
+  getTableTriggers,
 } from "@/lib/tauri";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import {
@@ -38,6 +39,11 @@ export function TableStructure({ connectionId, schema, table }: Props) {
     queryFn: () => getTableIndexes(connectionId, schema, table),
   });
 
+  const { data: triggers } = useQuery({
+    queryKey: ["table-triggers", connectionId, schema, table],
+    queryFn: () => getTableTriggers(connectionId, schema, table),
+  });
+
   return (
     <Tabs defaultValue="columns" className="flex h-full flex-col">
       <TabsList className="mx-2 mt-2 w-fit">
@@ -50,6 +56,9 @@ export function TableStructure({ connectionId, schema, table }: Props) {
         <TabsTrigger value="indexes" className="text-xs">
           Indexes{indexes ? ` (${indexes.length})` : ""}
         </TabsTrigger>
+        <TabsTrigger value="triggers" className="text-xs">
+          Triggers{triggers ? ` (${triggers.length})` : ""}
+        </TabsTrigger>
       </TabsList>
 
       <TabsContent value="columns" className="flex-1 overflow-hidden mt-0">
@@ -63,6 +72,7 @@ export function TableStructure({ connectionId, schema, table }: Props) {
                 <TableHead className="text-xs">Nullable</TableHead>
                 <TableHead className="text-xs">Default</TableHead>
                 <TableHead className="text-xs">Key</TableHead>
+                <TableHead className="text-xs">Comment</TableHead>
               </TableRow>
             </TableHeader>
             <TableBody>
@@ -84,7 +94,7 @@ export function TableStructure({ connectionId, schema, table }: Props) {
                     {col.is_nullable ? "YES" : "NO"}
                   </TableCell>
                   <TableCell className="max-w-[200px] truncate text-xs text-muted-foreground">
-                    {col.column_default ?? "—"}
+                    {col.column_default ?? "\u2014"}
                   </TableCell>
                   <TableCell>
                     {col.is_primary_key && (
@@ -93,6 +103,9 @@ export function TableStructure({ connectionId, schema, table }: Props) {
                       </Badge>
                     )}
                   </TableCell>
+                  <TableCell className="max-w-[200px] truncate text-xs text-muted-foreground">
+                    {col.comment ?? "\u2014"}
+                  </TableCell>
                 </TableRow>
               ))}
             </TableBody>
@@ -108,6 +121,9 @@ export function TableStructure({ connectionId, schema, table }: Props) {
                 <TableHead className="text-xs">Name</TableHead>
                 <TableHead className="text-xs">Type</TableHead>
                 <TableHead className="text-xs">Columns</TableHead>
+                <TableHead className="text-xs">References</TableHead>
+                <TableHead className="text-xs">On Update</TableHead>
+                <TableHead className="text-xs">On Delete</TableHead>
               </TableRow>
             </TableHeader>
             <TableBody>
@@ -124,6 +140,17 @@ export function TableStructure({ connectionId, schema, table }: Props) {
                   <TableCell className="text-xs">
                     {c.columns.join(", ")}
                   </TableCell>
+                  <TableCell className="text-xs text-muted-foreground">
+                    {c.referenced_table
+                      ? `${c.referenced_schema}.${c.referenced_table}(${c.referenced_columns?.join(", ")})`
+                      : "\u2014"}
+                  </TableCell>
+                  <TableCell className="text-xs text-muted-foreground">
+                    {c.update_rule ?? "\u2014"}
+                  </TableCell>
+                  <TableCell className="text-xs text-muted-foreground">
+                    {c.delete_rule ?? "\u2014"}
+                  </TableCell>
                 </TableRow>
               ))}
             </TableBody>
@@ -163,6 +190,49 @@ export function TableStructure({ connectionId, schema, table }: Props) {
           </Table>
         </ScrollArea>
       </TabsContent>
+
+      <TabsContent value="triggers" className="flex-1 overflow-hidden mt-0">
+        <ScrollArea className="h-full">
+          <Table>
+            <TableHeader>
+              <TableRow>
+                <TableHead className="text-xs">Name</TableHead>
+                <TableHead className="text-xs">Timing</TableHead>
+                <TableHead className="text-xs">Event</TableHead>
+                <TableHead className="text-xs">Level</TableHead>
+                <TableHead className="text-xs">Function</TableHead>
+                <TableHead className="text-xs">Enabled</TableHead>
+              </TableRow>
+            </TableHeader>
+            <TableBody>
+              {triggers?.map((t) => (
+                <TableRow key={t.name}>
+                  <TableCell className="text-xs font-medium">
+                    {t.name}
+                  </TableCell>
+                  <TableCell>
+                    <Badge variant="outline" className="text-[10px]">
+                      {t.timing}
+                    </Badge>
+                  </TableCell>
+                  <TableCell className="text-xs">
+                    {t.event}
+                  </TableCell>
+                  <TableCell className="text-xs">
+                    {t.orientation}
+                  </TableCell>
+                  <TableCell className="text-xs text-muted-foreground">
+                    {t.function_name}
+                  </TableCell>
+                  <TableCell className="text-xs">
+                    {t.is_enabled ? "YES" : "NO"}
+                  </TableCell>
+                </TableRow>
+              ))}
+            </TableBody>
+          </Table>
+        </ScrollArea>
+      </TabsContent>
     </Tabs>
   );
 }

src/components/workspace/TabContent.tsx

@@ -5,6 +5,7 @@ import { TableStructure } from "@/components/table-viewer/TableStructure";
 import { RoleManagerView } from "@/components/management/RoleManagerView";
 import { SessionsView } from "@/components/management/SessionsView";
 import { EntityLookupPanel } from "@/components/lookup/EntityLookupPanel";
+import { ErdDiagram } from "@/components/erd/ErdDiagram";
 
 export function TabContent() {
   const { tabs, activeTabId, updateTab } = useAppStore();
@@ -72,6 +73,14 @@ export function TabContent() {
               />
             );
             break;
+          case "erd":
+            content = (
+              <ErdDiagram
+                connectionId={tab.connectionId}
+                schema={tab.schema!}
+              />
+            );
+            break;
           default:
             content = null;
         }

src/hooks/use-schema.ts

@@ -8,6 +8,7 @@ import {
   listSequences,
   switchDatabase,
   getColumnDetails,
+  getSchemaErd,
 } from "@/lib/tauri";
 import type { ConnectionConfig } from "@/types";
 
@@ -88,3 +89,12 @@ export function useColumnDetails(connectionId: string | null, schema: string | n
     staleTime: 5 * 60 * 1000,
   });
 }
+
+export function useSchemaErd(connectionId: string | null, schema: string | null) {
+  return useQuery({
+    queryKey: ["schema-erd", connectionId, schema],
+    queryFn: () => getSchemaErd(connectionId!, schema!),
+    enabled: !!connectionId && !!schema,
+    staleTime: 5 * 60 * 1000,
+  });
+}

src/lib/tauri.ts

@@ -11,6 +11,8 @@ import type {
   ColumnInfo,
   ConstraintInfo,
   IndexInfo,
+  TriggerInfo,
+  ErdData,
   HistoryEntry,
   SavedQuery,
   SessionInfo,
@@ -115,6 +117,15 @@ export const getTableIndexes = (
   table: string
 ) => invoke<IndexInfo[]>("get_table_indexes", { connectionId, schema, table });
 
+export const getTableTriggers = (
+  connectionId: string,
+  schema: string,
+  table: string
+) => invoke<TriggerInfo[]>("get_table_triggers", { connectionId, schema, table });
+
+export const getSchemaErd = (connectionId: string, schema: string) =>
+  invoke<ErdData>("get_schema_erd", { connectionId, schema });
+
 // Data
 export const getTableData = (params: {
   connectionId: string;

src/types/index.ts

@@ -56,12 +56,18 @@ export interface ColumnInfo {
   ordinal_position: number;
   character_maximum_length: number | null;
   is_primary_key: boolean;
+  comment: string | null;
 }
 
 export interface ConstraintInfo {
   name: string;
   constraint_type: string;
   columns: string[];
+  referenced_schema: string | null;
+  referenced_table: string | null;
+  referenced_columns: string[] | null;
+  update_rule: string | null;
+  delete_rule: string | null;
 }
 
 export interface IndexInfo {
@@ -223,8 +229,13 @@ export interface SavedQuery {
   created_at: string;
 }
 
+export type AiProvider = "ollama" | "openai" | "anthropic";
+
 export interface AiSettings {
+  provider: AiProvider;
   ollama_url: string;
+  openai_api_key?: string;
+  anthropic_api_key?: string;
   model: string;
 }
 
@@ -272,7 +283,47 @@ export interface LookupProgress {
   total: number;
 }
 
-export type TabType = "query" | "table" | "structure" | "roles" | "sessions" | "lookup";
+export interface TriggerInfo {
+  name: string;
+  event: string;
+  timing: string;
+  orientation: string;
+  function_name: string;
+  is_enabled: boolean;
+  definition: string;
+}
+
+export interface ErdColumn {
+  name: string;
+  data_type: string;
+  is_nullable: boolean;
+  is_primary_key: boolean;
+}
+
+export interface ErdTable {
+  schema: string;
+  name: string;
+  columns: ErdColumn[];
+}
+
+export interface ErdRelationship {
+  constraint_name: string;
+  source_schema: string;
+  source_table: string;
+  source_columns: string[];
+  target_schema: string;
+  target_table: string;
+  target_columns: string[];
+  update_rule: string;
+  delete_rule: string;
+}
+
+export interface ErdData {
+  tables: ErdTable[];
+  relationships: ErdRelationship[];
+}
+
+export type TabType = "query" | "table" | "structure" | "roles" | "sessions" | "lookup" | "erd";
 
 export interface Tab {
   id: string;