Sql Considered Harmful

SQL Considered Harmful Shannon Posniewski Cryptic Studios

[object Object],[object Object],[object Object],[object Object],Shannon Posniewski

Database Fundamentals ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Database Types ,[object Object],[object Object],[object Object],[object Object],[object Object]

Relational Model ,[object Object],[object Object],[object Object],[object Object]

Relational Database ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Unique and Foreign Keys ,[object Object],[object Object]

Player ID PlayerName … AttribN 818 Warthog … foo 237 John … bar Player ID Item Count 818 Hat 1 818 Brooch 1 818 Pteradactyl 1 237 Monkey Paw 1

Class ID Name 1 Elf 2 Orc 3 Monkey Player ID Name … Class ID 818 Warthog … 2 237 John … 3

SQL DBMSs ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Good ,[object Object],[object Object],[object Object]

The Bad ,[object Object],[object Object],[object Object]

The Ugly ,[object Object],[object Object]

Object-Relational Impedance Mismatch ,[object Object],[object Object]

The Evils of Normalization ,[object Object]

This was Bad Player ID Stat ID Value 818 Time Online 2,123 818 Fights Won 700 818 Fights Lost 3 … 818 Stat N Value N

This was Good Abandons relational DB concepts Player ID Stat 0 Value Stat 1 Value … Stat N Value 818 2,123 200 … Value N 237 5,235 60 … Value N 54 675 23 … Value N

Solution: Caching ,[object Object],[object Object],[object Object],[object Object]

Not Enough ,[object Object],[object Object],[object Object]

Reduce Throughput Needs ,[object Object],[object Object],[object Object]

Data Ownership ,[object Object],[object Object],[object Object]

Cross-Owner Transactions ,[object Object],[object Object],[object Object]

[object Object],[object Object]

It’s just not the right tool

Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Relaxations ,[object Object],[object Object],[object Object],[object Object]

StructParser ,[object Object],[object Object],[object Object],[object Object]

Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Struct Metadata ,[object Object],[object Object],[object Object],[object Object],[object Object]

Basic Operations ,[object Object],[object Object],[object Object]

Data and Logic Ownership ,[object Object],[object Object]

Architecture Map Server Map Server Map Server Team Server Cryptic DB Transaction Server

Cryptic Engine Transactions ,[object Object],[object Object],[object Object],[object Object]

AUTO_TRANSACTION ,[object Object],AUTO_TRANSACTION; enumTransactionOutcome trGiveGold(ATR_ARGS, NOCONST(Entity) *pEnt1, NOCONST(Entity) *pEnt2, int amount) { if (pEnt1->gold < amount) TRANSACTION_RETURN(TRANSACTION_OUTCOME_FAILURE, ” NotEnoughGold”); pEnt1->gold -= amount; pEnt2->gold += amount; return TRANSACTION_OUTCOME_SUCCESS; }

Step 1 Transaction Server Server 1 A Server 2 B DoTrade Trans(“DoTrade”, A, B)

Step 2 Transaction Server Server 1 Trans(“DoTrade”, A, B) A Server 2 B DoTrade 1 2 3 4 … 1 2 3 4 …

Step 3 Transaction Server Server 1 A Server 2 B DoTrade 1 2 3 4 … B

Step 4 Transaction Server Server 1 A Server 2 B DoTrade 1 2 3 4 … B A’ B’

Step 4 Transaction Server Server 1 A Server 2 B 1 2 3 4 … B A’ dB B’ dB B’

Step 4 Transaction Server Server 1 Server 2 1 2 3 4 … A’ B’

Abstract Cryptic DB ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sql Considered Harmful

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