Vidx = vidx || E'\nCREATE INDEX ' || cidx || ' ON ' || ptable || ' (' WHERE c.relname = ptable AND i.indisunique != 't' AND i.indisprimary != 't' LEFT JOIN pg_stat_user_indexes s USING (indexrelid)
LEFT JOIN pg_attribute a ON a.attrelid = c.oid AND a.attnum = ANY(i.indkey) Vsql = substr(vsql,1,length(vsql)-1) || ') WITHOUT OIDS' įOR ridx IN SELECT s.indexrelname as nome, a.attname as colįROM pg_index i LEFT JOIN pg_class c ON c.oid = i.indrelid Vkey = E'\nCONSTRAINT ' || rkey.name || ' PRIMARY KEY (' Vsql = vsql || ' DEFAULT ' || ldef įOR rkey IN SELECT constraint_name as name, column_name as col Numeric_precision as num_prec, numeric_scale as num_scale Is_nullable as is_null, character_maximum_length as len, Source code: CREATE OR REPLACE FUNCTION xaddcolumn(ptable text, pcol text, pafter text) RETURNS void AS $BODY$ĮXECUTE 'CREATE TABLE zzz_' || ptable || ' AS SELECT * FROM ' || ptable įOR rcol IN SELECT column_name as col, udt_name as coltype, column_default as coldef, Missing Views and Foreign Key and other features are missing.Įxample: SELECT xaddcolumn('table', 'col3 int NOT NULL DEFAULT 0', 'col2') It works with indexes, primary key, and triggers. The column order is relevant to me, so I created this function.
#Postgresql alter table add column code#
Why make the code more brittle than it needs to be? Correctness should always be a higher priority than saving a few keystrokes.Īs a work around, you can in fact modify the column ordering by recreating the table, or through the "add and reorder" game In production code you should never be using an implicit ordering or *.
#Postgresql alter table add column Patch#
It's somewhat likely to change at some point when an acceptable patch is submitted.Īll of that said, is it a good idea to rely on the ordinal positioning of columns, logical or physical? Hell no. That's problematic because you can't get a different logical ordering, but it's even worse because the table isn't physically packed automatically, so by moving columns you can get different performance characteristics.Īrguing that it's that way by intent in design is pointless. Currently PostgreSQL's logical ordering is the same as the physical ordering. The real problem here is that it's not done yet.
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