From afa1a629301214a1c4d33cdf56d97d5e07f925e8 Mon Sep 17 00:00:00 2001
From: Gezi-lzq <lzqtxwd@gmail.com>
Date: Thu, 2 Jan 2025 00:29:50 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BD=BF=E7=94=A8=E5=A4=AA=E8=AE=B0=E6=A1=8C?=
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 tiddlers/predicate pushdown.tid | 8 ++++++++
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 create mode 100644 tiddlers/predicate pushdown.tid

diff --git a/tiddlers/predicate pushdown.tid b/tiddlers/predicate pushdown.tid
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+created: 20250101161116458
+creator: Gezi-lzq
+modified: 20250101161155452
+modifier: Gezi-lzq
+tags: 大数据
+title: predicate pushdown
+
+在数据存储和查询优化中，"predicate pushdown" 是一种优化技术，涉及在数据库查询过程中尽量在查询早期阶段进行过滤条件的应用，以减少不必要的数据扫描和处理。这个过程通常发生在存储引擎层面，查询引擎将过滤条件（谓词）下推到数据源以尽量减少返回的数据量。
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