Other Binary String Functions
GaussDB provides common syntax used for calling functions.
btrim(string bytea,bytes bytea)
Description: Removes the longest string containing only bytes from the start and end of string.
Return type: bytea
Example:
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gaussdb=# SELECT btrim(E'\\000trim\\000'::bytea, E'\\000'::bytea) AS RESULT; result ------------ \x7472696d (1 row) |
get_bit(string, offset)
Description: Extracts bits from a string.
Return type: int
Example:
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gaussdb=# SELECT get_bit(E'Th\\000omas'::bytea, 45) AS RESULT; result -------- 1 (1 row) |
get_byte(string, offset)
Description: Extracts bytes from a string.
Return type: int
Example:
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gaussdb=# SELECT get_byte(E'Th\\000omas'::bytea, 4) AS RESULT; result -------- 109 (1 row) |
set_bit(string,offset, newvalue)
Description: Sets bits in a string.
Return type: bytea
Example:
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gaussdb=# SELECT set_bit(E'Th\\000omas'::bytea, 45, 0) AS RESULT; result ------------------ \x5468006f6d4173 (1 row) |
set_byte(string,offset, newvalue)
Description: Sets bytes in a string.
Return type: bytea
Example:
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gaussdb=# SELECT set_byte(E'Th\\000omas'::bytea, 4, 64) AS RESULT; result ------------------ \x5468006f406173 (1 row) |
rawcmp(raw, raw)
Description: Specifies the raw data type comparison function.
Parameters: raw, raw
Return type: integer
raweq(raw, raw)
Description: Specifies the raw data type comparison function.
Parameters: raw, raw
Return type: Boolean
rawge(raw, raw)
Description: Specifies the raw data type comparison function.
Parameters: raw, raw
Return type: Boolean
rawgt(raw, raw)
Description: Specifies the raw data type comparison function.
Parameters: raw, raw
Return type: Boolean
rawin(cstring)
Description: Specifies the raw data type parsing function.
Parameter: cstring
Return type: bytea
rawle(raw, raw)
Description: Specifies the raw data type parsing function.
Parameters: raw, raw
Return type: Boolean
rawlike(raw, raw)
Description: Specifies the raw data type parsing function.
Parameters: raw, raw
Return type: Boolean
rawlt(raw, raw)
Description: Specifies the raw data type parsing function.
Parameters: raw, raw
Return type: Boolean
rawne(raw, raw)
Description: Compares whether the raw types are the same.
Parameters: raw, raw
Return type: Boolean
rawnlike(raw, raw)
Description: Checks whether the raw type matches the pattern.
Parameters: raw, raw
Return type: Boolean
rawout(bytea)
Description: Specifies the RAW output API.
Parameter: bytea
Return type: cstring
rawsend(raw)
Description: Converts the bytea type to the binary type.
Parameter: raw
Return type: bytea
rawtohex(text)
Description: Converts the raw format to the hexadecimal format.
Parameter: text
Return type: text
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