Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_203_281 ( id number, "season" number, "pitcher" text, "decision" text, "final\nscore" text, "opponent" text, "location" text )

### Question ###
roy oswalt opened for the astros for eight years in a row , seven of which were in minute maid park , but in what year did he start the season opener in petco park ?

### Accurate SQL ###

SELECT "season" FROM table_203_281 WHERE "location" = 'petco park'