[□=□ | □]
[tag=□ | □]
[lemma=□ | □]
In addition , every kind of function can return a base type or a composite type . The libpq library allows a single frontend to make multiple connections to backend processes . Not every user has authorization to become a database administrator . These operators must be named ' <' and '> ' ; you do not have any choice in the matter , since there is no provision for specifying them explicitly . This involves engineering nanostructured surfaces to create a very sensitive method to detect trace amounts of chemicals and microorganisms . Although the minimum required memory for running Postgres is as little as 8MB , there are noticable improvements in runtimes for the regression tests when expanding memory up to 96MB on a relatively fast dual-processor system running X-Windows . When specifying merge sort operators , the current operator and both referenced operators must return boolean ; the SORT1 operator must have both input datatypes equal to the current operator 's left argument type , and the SORT2 operator must have both input datatypes equal to the current operator 's right argument type . While not mandated by the government , many proactive wastewater plants are upgrading their security against both external and internal malicious threats . Every operator is " syntactic sugar " for a call to an underlying function that does the real work ; so you must first create the underlying function before you can create the operator . It is common for a frontend that sends NOTIFY to be listening on the same notify name itself . DeWitt created the Space-Based Radar software engineering team , led the authoring of the Software Acquisition Master Plan , established programmatic software risk plans , and is the contracting officer 's technical representative for all software issues to both prime system contractors . This is all performed without having to allocate a lock for every row like traditional database systems . sfunc2 The state transition function to be called for every non-NULL field from the source column . Note that if the left and right data types are different , neither of these operators is the same as either SORT operator .