fix duplicate tables in listTablesContextProvider

Author: ajshedivy

src/aiProviders/continue/listTablesContextProvider.ts

@@ -14,6 +14,7 @@ import {
   getSqlContextItems
 } from "../context";
 import Configuration from "../../configuration";
+import { getContextItems } from "../prompt";
 
 const listDb2Table: ContextProviderDescription = {
   title: "list Db2i Tables",
@@ -28,6 +29,7 @@ interface SchemaContextProvider {
 }
 
 let providers: SchemaContextProvider[] = []
+let refCache: Set<string> = new Set<string>();
 
 class ListDb2iTables implements IContextProvider {
   constructor(private schema: string) {
@@ -82,9 +84,13 @@ class ListDb2iTables implements IContextProvider {
       }
 
     } else {
-      const tablesRefs = await getSqlContextItems(extras.fullInput);
-      for (const table of tablesRefs.items) {
-        contextItems.push(table);
+      const tablesRefs = await getContextItems(extras.fullInput);
+      for (const tableData of tablesRefs.context) {
+        if (refCache.has(tableData.name)) {
+          continue;
+        } 
+        contextItems.push(tableData);
+        refCache.add(tableData.name);
       }
     }
     return contextItems;