I guess one cannot create an index on an element of an array?
test=> create table test ( ordinal int[] ); CREATE TABLE test=> create unique index x1 on test ( ordinal[1] ); ERROR: syntax error at or near ")" at character 45 LINE 1: create unique index x1 on test ( ordinal[1] ); ^ Correct, or is my syntax wrong? ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq