Today I Learned

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New PostgreSQL 9.6 slice syntax

PostgreSQL arrays support slice operations.

jack=# select ('{a,b,c,d,e,f}'::text[])[2:4];

New in PostgreSQL 9.6 is slice syntax with implicit lower and upper bounds.

jack=# select ('{a,b,c,d,e,f}'::text[])[:4];
jack=# select ('{a,b,c,d,e,f}'::text[])[3:];

Previously, array_lower and array_upper was needed to slice from a particular index to the bounds of an array.

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