sql tree refactor

packages/sqltree/src/dumpSqlSource.ts

@@ -0,0 +1,40 @@
+import { Source } from "./types";
+import { SqlDumper } from "@dbgate/types";
+import { dumpSqlSelect } from "./dumpSqlCommand";
+
+export function dumpSqlSourceDef(dmp: SqlDumper, source: Source) {
+  let sources = 0;
+  if (source.name != null) sources++;
+  if (source.subQuery != null) sources++;
+  if (source.subQueryString != null) sources++;
+  if (sources != 1)
+    throw new Error("sqltree.Source should have exactly one source");
+
+  if (source.name != null) {
+    dmp.put("%f", source.name);
+  }
+  if (source.subQuery) {
+    dmp.put("(");
+    dumpSqlSelect(dmp, source.subQuery);
+    dmp.put(")");
+  }
+  if (source.subQueryString) {
+    dmp.put("(");
+    dmp.putRaw(source.subQueryString);
+    dmp.put(")");
+  }
+  if (source.alias) {
+    dmp.put(" %i", this.alias);
+  }
+}
+
+export function dumpSqlSourceRef(dmp: SqlDumper, source: Source) {
+  if (source.alias) {
+    dmp.put("%i", source.alias);
+    return true;
+  } else if (source.name) {
+    dmp.put("%f", source.name);
+    return true;
+  }
+  return false;
+}