Overview

As an extension of SQL, PL introduces control statements, which enable higher flexibility in controlling the execution order of statements in a program.

OceanBase Database has the following three types of PL flow control statements:

• Conditional control

  A conditional control statement runs different statements based on different runtime conditions. Conditional selection statements include IF and CASE.

• Loop control

  A loop control statement repeatedly executes a series of statements based on conditions. Loop statements include FOR LOOP, WHILE LOOP, and basic LOOP.

• Sequential control

  A sequential control statement allows transfers to the specified statement or does nothing. Sequential control statements include GOTO and NULL.