SQL · Theory

Binlog

Theory

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Binlog

Binlog sits in a small live site. Kabir’s job is Kabir walking through Binlog. Write that first.

Binlog order — meaning → one Binlog step Kabir can write from memory → one limit. Dumping ten features helps nobody.

Binlog exists so Kabir can keep Kabir walking through Binlog correct in a small live site.

Kabir ships Binlog in a small live site. That is the use case worth saying.

Don’t do this with Binlog — only reciting the name of Binlog. Interviewers spot it in ten seconds.

After Binlog, Kabir should still remember only reciting the name of Binlog.

Viva for Binlog: what it is → one Binlog step Kabir can write from memory → the mistake (only reciting the name of Binlog).

Exam tip

Board: Kabir walking through Binlog. Dry-run Binlog. Name the trap: only reciting the name of Binlog.

Binlog — sample query

-- Binlog
CREATE TABLE demo (
  id INTEGER PRIMARY KEY,
  label TEXT NOT NULL,
  qty INTEGER DEFAULT 0
);
INSERT INTO demo (id, label, qty) VALUES
  (1, 'alpha', 2),
  (2, 'beta', 5);
SELECT label, qty FROM demo WHERE qty >= 2 ORDER BY qty DESC;

Binlog: create two demo rows, then SELECT qty >= 2 ordered. Say which labels come back.

Short notes

DefBinlog — Kabir uses it for Kabir walking through Binlog in a small live site.
RuleBinlog → one Binlog step Kabir can write from memory.
RememberBinlog + the query planner (a small live site).
UseBinlog in a small live site (Kabir walking through Binlog).
TrapBinlog — only reciting the name of Binlog.
ExBinlog → Kabir walking through Binlog.

-- Binlog CREATE TABLE demo ( id INTEGER PRIMARY KEY, label TEXT NOT NULL, qty INTEGER DEFAULT 0 ); INSERT INTO demo (id, label, qty) VALUES (1, 'alpha', 2), (2, 'beta', 5); SELECT label, qty FROM demo WHERE qty >= 2 ORDER BY qty DESC;

Binlog

Binlog — sample query

Short notes

Questions

Binlog

Binlog — sample query

Short notes

Questions