What is stored procedure and its syntax?.So in this tutorial, we have learned about “ Create a stored procedure in PostgreSQL” and covered the following topics. You may like the following PostgreSQL tutorials: These are the cities of the USA that we have fetched using the procedure usa(). In the above output, cities like New York, Los Angles, Chicago, etc. Let’s create a stored procedure in Postgresql using pgAdmin using follow instructions. Read PostgreSQL WHERE IN with examples Create stored procedure in postgresql using pgadmin LANGUAGE language_name CREATE PROCEDURE procedure_name(arg1 type,arg2 type)Ĭonstants can not be changed through the function, and it is declared like a variable but with CONSTANT keyword using the following syntax: CREATE FUNCTION function_name(arg1 type,arg2 type) The variable holds a value whose value can vary through the life of function, before using the variable, we must declare it with data type using the following syntax: CREATE FUNCTION function_name(arg1 type,arg2 type) Read, PostgreSQL CASE with Examples The variables and constants in PL/pgSQL To call created function or procedure that returns a table, we can use this one: To call created function or procedure, we can use: SELECT * FROM function_name(val_1) - for functionĬALL procedure_name(val_1) - for procedure Language: It is used to specify the procedural language of function or procedure, for Postgresql, it is the plpgsql.
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Returns: It is used to specify the return type of the function or procedure.argument type: It is used to provide a list of arguments with its datatype like boolean, integer, etc into parenthesis of function or procedure.function_name or procedure_name: It is the name of function or procedure that we want to create.Procedure syntax for Postgresql version 11 or next: CREATE PROCEDURE procedure_name(argument type) Procedure syntax for Postgresql version before 11: CREATE FUNCTION function_name(argument1 type,argument2 type) Before Postgresql version 11, stored procedures were created using CREATE FUNCTION statement, but with the Postgresql version 11, are created using CREATE PROCEDURE.
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