first commit

2023-05-19 00:42:48 +08:00
commit 53de9c6c51
243 changed files with 39485 additions and 0 deletions
@@ -0,0 +1,44 @@
+'use strict';
+
+var QueryTables = require('cartodb-query-tables');
+
+var generateMD5 = require('../utils/md5');
+
+function CachedQueryTables(tableCache) {
+    this.tableCache = tableCache;
+}
+
+module.exports = CachedQueryTables;
+
+CachedQueryTables.prototype.getAffectedTablesFromQuery = function(pg, sql, skipCache, callback) {
+    var self = this;
+
+    var cacheKey = sqlCacheKey(pg.username(), sql);
+
+    var cachedResult;
+    if (!skipCache) {
+        cachedResult = this.tableCache.peek(cacheKey);
+    }
+
+    if (cachedResult) {
+        cachedResult.hits++;
+        return callback(null, cachedResult.result);
+    } else {
+        QueryTables.getAffectedTablesFromQuery(pg, sql, function(err, result) {
+            if (err) {
+                return callback(err);
+            }
+
+            self.tableCache.set(cacheKey, {
+                result: result,
+                hits: 0
+            });
+
+            return callback(null, result);
+        });
+    }
+};
+
+function sqlCacheKey(user, sql) {
+    return user + ':' + generateMD5(sql);
+}