Sandeep Gupta <gupta.sandeep@xxxxxxxxx> writes: > I looked for description of sublinks in the code as well as online but > failed to come with any information. Was wondering someone can provide a > line or two of what sublinks are suppose to do? They're sub-SELECTs used in expression contexts (ie, not directly in a FROM list). The comments for the SubLink and SubPlan node types in primnodes.h may help you. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general