feat: firebird FKs, PKs, procedures, funcs

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

@@ -0,0 +1,16 @@
+module.exports = `
+SELECT
+    TRIM(F.RDB$FUNCTION_NAME) AS "pureName",
+    TRIM(F.RDB$OWNER_NAME) AS "schemaName",
+    TRIM(F.RDB$FUNCTION_NAME) AS "objectId",
+    TRIM('FUNCTION') AS "objectTypeField",
+    TRIM(F.RDB$DESCRIPTION) AS "objectComment",
+    F.RDB$FUNCTION_SOURCE AS "createSql", -- This is the PSQL body or definition for UDRs
+    FALSE AS "requiresFormat" -- Assuming PSQL source is generally readable
+FROM
+    RDB$FUNCTIONS F
+WHERE
+    COALESCE(F.RDB$SYSTEM_FLAG, 0) = 0 -- User-defined functions
+ORDER BY
+    "schemaName", "pureName";
+`;