postgresql function return value
If the last query happens to return no rows at all, the null value will be returned. Alternatively, an SQL function can be declared to return a set, by specifying the function's return type as SETOF sometype, or equivalently by declaring it as RETURNS, Since Postgres 9.0 you can also use input parameters as variables. ... parameter now acts like a local variable initialized to the passed-in value. CREATE OR REPLACE FUNCTION get(_param_id integer) RETURNS integer ...,SET configuration_parameter TO value | = value | FROM CURRENT } ... CREATE OR REPLACE FUNCTION 將建立一個新的函數，或是更換現有的函數定義。為了能夠定義 ... 此外，OUT 和INOUT 參數不能與RETURNS TABLE 表示法一起使用。 ,Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. ,Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. ,Function return values are converted to the declared PostgreSQL return data type as follows: When the PostgreSQL return type is boolean, the return value will be evaluated for truth according to the Python rules. That is, 0 and empty string are false, but,Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. ,In this tutorial, we will show you how to develop PostgreSQL functions that return a table. ,PostgreSQL的函數也被稱為存儲過程，可執行操作，通常會作為一些查詢和往返在一個單一的 ... CREATE [OR REPLACE] FUNCTION function_name (arguments) RETURNS ... RETURN variable_name | value } END; LANGUAGE plpgsql;.
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 postgresql function return value 相關參考資料
(SQL) Functions - PostgreSQL
If the last query happens to return no rows at all, the null value will be returned. Alternatively, an SQL function can be declared to return a set, by specifying the function's return type as SET... https://www.postgresql.org Can I make a plpgsql function return an integer without using a ...
Since Postgres 9.0 you can also use input parameters as variables. ... parameter now acts like a local variable initialized to the passed-in value. CREATE OR REPLACE FUNCTION get(_param_id integer) R... https://stackoverflow.com CREATE FUNCTION - PostgreSQL 正體中文使用手冊
SET configuration_parameter TO value | = value | FROM CURRENT } ... CREATE OR REPLACE FUNCTION 將建立一個新的函數，或是更換現有的函數定義。為了能夠定義 ... 此外，OUT 和INOUT 參數不能與RETURNS TABLE 表示法一起使用。 https://docs.postgresql.tw Documentation: 8.2: CREATE FUNCTION - PostgreSQL
Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. https://www.postgresql.org Documentation: 9.1: CREATE FUNCTION - PostgreSQL
Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. https://www.postgresql.org Documentation: 9.2: Data Values - PostgreSQL
Function return values are converted to the declared PostgreSQL return data type as follows: When the PostgreSQL return type is boolean, the return value will be evaluated for truth according to the P... https://www.postgresql.org Documentation: 9.3: CREATE FUNCTION - PostgreSQL
Also, CREATE OR REPLACE FUNCTION will not let you change the return type ... If the function is not supposed to return a value, specify void as the return type. https://www.postgresql.org PLpgSQL Function Returns A Table - PostgreSQL Tutorial
In this tutorial, we will show you how to develop PostgreSQL functions that return a table. https://www.postgresqltutorial PostgreSQL函數- PostgreSQL基礎教程 - 極客書
PostgreSQL的函數也被稱為存儲過程，可執行操作，通常會作為一些查詢和往返在一個單一的 ... CREATE [OR REPLACE] FUNCTION function_name (arguments) RETURNS ... RETURN variable_name | value } END; LANGUAGE plpgsql;. http://tw.gitbook.net |