sql tree refactor

packages/sqltree/src/dumpSqlExpression.ts

@@ -0,0 +1,20 @@
+import { SqlDumper } from "@dbgate/types";
+import { Expression, ColumnRefExpression } from "./types";
+import { dumpSqlSourceRef } from "./dumpSqlSource";
+
+function dumpSqlColumnRef(dumper: SqlDumper, expr: ColumnRefExpression) {
+  if (expr.source) {
+    if (dumpSqlSourceRef(dumper, expr.source)) {
+      dumper.put(".");
+    }
+  }
+  dumper.put("%i", expr.columnName);
+}
+
+export function dumpSqlExpression(dumper: SqlDumper, expr: Expression) {
+  switch (expr.exprType) {
+    case "column":
+      dumpSqlColumnRef(dumper, expr as ColumnRefExpression);
+      break;
+  }
+}