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Add get_bit/set_bit functions for bit strings, paralleling those for bytea,

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and implement OVERLAY() for bit strings and bytea.

In passing also convert text OVERLAY() to a true built-in, instead of
relying on a SQL function.

Leonardo F, reviewed by Kevin Grittner
This commit is contained in:
Tom Lane
2010-01-25 20:55:32 +00:00
parent 1d1f425f8d
commit 9507c8a1db
13 changed files with 554 additions and 93 deletions
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3
src/test/regress/sql/strings.sql
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@ -547,3 +547,6 @@ SELECT trim(E'\\000'::bytea from E'\\000Tom\\000'::bytea);
SELECT btrim(E'\\000trim\\000'::bytea, E'\\000'::bytea);
SELECT btrim(''::bytea, E'\\000'::bytea);
SELECT btrim(E'\\000trim\\000'::bytea, ''::bytea);
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'Th\\001omas'::bytea from 2),'escape');
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 8),'escape');
SELECT encode(overlay(E'Th\\000omas'::bytea placing E'\\002\\003'::bytea from 5 for 3),'escape');