So I’m currently creating some SQL to read through the postgres (9.1) catalogs to build table definitions. However, I am encountering a problem with SERIAL/BIGSERIAL data types.
Example:
CREATE TABLE cruft.temp ( id BIGSERIAL PRIMARY KEY );
SELECT * FROM information_schema.columns WHERE table_schema='cruft' AND table_name='temp';
"db","cruft","temp","id",1,"nextval('cruft.temp_id_seq'::regclass)","NO","bigint",,,64,2,0,,,,,,,,,,,,,"db","pg_catalog","int8",,,,,"1","NO","NO",,,,,,,"NEVER",,"YES"
It gives me database name (db), schema name (cruft), table name (temp), column name (id), default value (nextval( … )), and data type (bigint and int8 .. NOT bigserial) … I realize that I could just check to see if the default value was a sequence – but I don’t believe that would be 100% accurate since I could manually create a sequence and create a non serial column where the default value was that sequence.
Does anyone have a suggestion for how I might accomplish this? Anything other than checking the default value for a nextval(*_seq)?
