Convert SQL Server stored procedure into PostgreSQL stored procedure [closed]

I am very new to PostgreSQL database, I am developing database objects in SQL Server 2008 but I require some operation on PostgreSQL also.

Here, I write one sample stored procedure of SQL Server which I need to convert into PostgreSQL. Please help me in this with PostgreSQL.

Thanks in advance.

Below is sample SQL Server stored procedure: require to convert into PostgreSQL stored procedure

CREATE PROCEDURE [dbo].[usp_GetData_ByTableName]
(
    @TableName NVARCHAR(MAX)    
    ,@IncludeKeepAlive BIT
    ,@RowsAffected BIGINT=0 OUTPUT
) AS

BEGIN

    SET NOCOUNT ON
    DECLARE @SQL VARCHAR(MAX)

    /****************************************************************
    Select data base on parameter.
    *****************************************************************/                          
    SET @SQL =
    '
        SELECT *FROM '+@TableName+' 
        WHERE 1=1
    '
    +
    CASE WHEN (@IncludeKeepAlive = 0)
        THEN
            '
                AND [MessageTransactionID] <> 152
            '
        ELSE
            ''
    END     

    EXECUTE SP_EXECUTESQL @SQL

    RETURN 0  
END