| string ||
string | bytea |
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| E'\\\\Post'::bytea || E'\\047gres\\000'::bytea | \\Post'gres\000 |
get_bit(string, offset) | int |
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| get_bit(E'Th\\000omas'::bytea, 45) | 1 |
get_byte(string, offset) | int |
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| get_byte(E'Th\\000omas'::bytea, 4) | 109 |
octet_length(string) | int | �Х��ʥ�ʸ������ΥХ��ȿ� | octet_length(E'jo\\000se'::bytea) | 5 |
position(substring in string) | int | Location of specified substring | position(E'\\000om'::bytea in E'Th\\000omas'::bytea) | 3 |
set_bit(string,
offset, newvalue) | bytea |
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| set_bit(E'Th\\000omas'::bytea, 45, 0) | Th\000omAs |
set_byte(string,
offset, newvalue) | bytea |
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| set_byte(E'Th\\000omas'::bytea, 4, 64) | Th\000o@as |
substring(string [from int] [for int]) | bytea |
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| substring(E'Th\\000omas'::bytea from 2 for 3) | h\000o |
trim([both]
bytes from
string)
| bytea |
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| trim(E'\\000'::bytea from E'\\000Tom\\000'::bytea) | Tom |