Env var for the max rows returned

Author: matt-aitken

apps/webapp/app/env.server.ts

@@ -1196,6 +1196,7 @@ const EnvironmentSchema = z
     QUERY_CLICKHOUSE_MAX_AST_ELEMENTS: z.coerce.number().int().default(4_000_000),
     QUERY_CLICKHOUSE_MAX_EXPANDED_AST_ELEMENTS: z.coerce.number().int().default(4_000_000),
     QUERY_CLICKHOUSE_MAX_BYTES_BEFORE_EXTERNAL_GROUP_BY: z.coerce.number().int().default(0),
+    QUERY_CLICKHOUSE_MAX_RETURNED_ROWS: z.coerce.number().int().default(10_000),
 
     // Query page concurrency limits
     QUERY_DEFAULT_ORG_CONCURRENCY_LIMIT: z.coerce.number().int().default(3),

apps/webapp/app/services/queryService.server.ts

@@ -159,6 +159,10 @@ export async function executeQuery<TOut extends z.ZodSchema>(
         ...getDefaultClickhouseSettings(),
         ...baseOptions.clickhouseSettings, // Allow caller overrides if needed
       },
+      querySettings: {
+        maxRows: env.QUERY_CLICKHOUSE_MAX_RETURNED_ROWS,
+        ...baseOptions.querySettings, // Allow caller overrides if needed
+      },
     });
 
     // If query failed, return early with no queryId