MySQL row format parsing

summary

mysql Although we don't pay much attention to the line format when we write code , But it is helpful for us to understand , So that we can deal with mysql Have a certain understanding of how to store data , We can be better right mysql Do some optimization and save storage space . Understand row format , In fact, it is to understand how each record we insert into the database is stored .

Line record analysis

1. Row format classification

COMPACT,Redundant,Dynamic,Compressed, Because now the default is Dynamic, We just need to know this , Other The row format of is similar

2.Dynamic Row structure analysis

1. Table example

2.dynamic chart

3. interpretative statement

1. The variable length field length list records the length of the variable length column of the current row ( Reverse discharge ), Use 1