Sql Setting variable in a Postgres function Stack Overflow
2 Answers That would be SELECT expressions INTO variables FROM but you can do it all in one statement INSERT INTO purchases p cid pdate eid ccode SELECT p cid current date 1 SELECT code FROM couponcode WHERE eid 1 AND percentage 100 FROM purchase p GROUP BY p cid HAVING COUNT 1 5 ORDER BY makes no sense here
Postgresql Use psql set variable in a function Database , As an alternative to prefixing all objects with the schema qualifier SCH variable you may assign search path so that it happens automatically CREATE SCHEMA SCH SET search path TO SCH After this all CREATE statements and type lookups happen in SCH Concerning queries inside the bodies of functions by default they still use whatever is the search path at run time but this can
Postgresql Passing parameters for dynamic SQL in a function
select text select from some other function 1 2 There are quite a few related answers with more details here on dba SE Try a search for postgres dynamic sql format code EXECUTE code USING Prominently How to use function parameters in dynamic SQL with EXECUTE Also Table name as a PostgreSQL function parameter
PostgreSQL Documentation 16 43 3 Declarations, All variables used in a block must be declared in the declarations section of the block The only exceptions are that the loop variable of a FOR loop iterating over a range of integer values is automatically declared as an integer variable and likewise the loop variable of a FOR loop iterating over a cursor s result is automatically declared as a record variable
PostgreSQL Documentation 16 SET
PostgreSQL Documentation 16 SET, SET NAMES value is an alias for SET client encoding TO value SEED Sets the internal seed for the random number generator the function random Allowed values are floating point numbers between 1 and 1 inclusive The seed can also be set by invoking the function setseed SELECT setseed value TIME ZONE
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How to declare variable in PostgreSQL Stack Overflow
How to declare variable in PostgreSQL Stack Overflow Create a new setting in postgresql conf for custom variable classes custom variable classes var Reload the config you now have the variable var available in all your databases To create the variable p country just use SET SET var p country US SELECT current setting var p country AS p country It s not a beauty but it works
Optimizer Index Caching In PostgreSQL PostgreSQL Performance
I have modified my function but I have problems with declaring variables I use Postgres 8 4 CREATE OR REPLACE FUNCTION recounterid mindate timestamptz maxdate timestamptz RETURNS TA Declare variable for SELECT statement in Postgres function. With MSSQL it s easy the marking the start of all variable names allows the parser to know that it is a variable not a column This is useful for things like injecting constant values where a select is providing the input to an insert table when copying from a staging table declare foo varchar 50 bar select foo 38 5 9 SQL Functions Returning Sets When an SQL function is declared as returning SETOF sometype the function s final query is executed to completion and each row it outputs is returned as an element of the result set This feature is normally used when calling the function in the FROM clause
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