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How to have the break statement in PostgreSQL? I have the structure like this:
for() { for() { if(somecondition) break; } } As per my understanding it should only break the inner for loop?
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In PostgreSQL, The EXIT statement is used to terminate all types of loops like unconditional loops, a while loop, or a for loop or terminate a block of code specified by the begin.. end keywords.
NULLIF in postgreSQL is an in-built conditional function that takes two arguments and returns null if two arguments are equal. Otherwise, it returns the first argument. The function returns NULL if either of the arguments is NULL .
RETURN NEXT can be used with both scalar and composite data types; with a composite result type, an entire “table” of results will be returned. RETURN QUERY appends the results of executing a query to the function's result set.
PL/pgSQL is easy to learn and simple to use. PL/pgSQL comes with PostgreSQL by default. The user-defined functions and stored procedures developed in PL/pgSQL can be used like any built-in functions and stored procedures. PL/pgSQL inherits all user-defined types, functions, and operators.
There is no BREAK
EXIT terminates the loop.CONTINUE continues at the next iteration of the loop.
You can attach a <<label>> to loops and add it as parameter to each of these commands. Then you terminate / continue the labeled loop. Else, it concerns the inner loop.RETURN exits from the function (so not applicable in a DO statement).
All of this applies to procedural elements of PL/pgSQL, not SQL.
Code example using all three:
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