#[repr(u8)]pub enum OptionalMetadataFieldType {
SIGNEDNESS = 1,
DEFAULT_CHARSET = 2,
COLUMN_CHARSET = 3,
COLUMN_NAME = 4,
SET_STR_VALUE = 5,
ENUM_STR_VALUE = 6,
GEOMETRY_TYPE = 7,
SIMPLE_PRIMARY_KEY = 8,
PRIMARY_KEY_WITH_PREFIX = 9,
ENUM_AND_SET_DEFAULT_CHARSET = 10,
ENUM_AND_SET_COLUMN_CHARSET = 11,
COLUMN_VISIBILITY = 12,
}
Expand description
Enumerates types of optional metadata fields.
Variants§
SIGNEDNESS = 1
UNSIGNED flag of numeric columns.
§Value format
For each numeric column, a bit indicates whether the numeric colunm has unsigned flag.
1
means it is unsigned. The number of bytes needed for this
is int((column_count + 7) / 8)
.
DEFAULT_CHARSET = 2
Character set of string columns.
This field should not appear with COLUMN_CHARSET
.
§Value format
- default charset as a lenght-encoded integer,
- then for every character column which charset isn’t default:
- column index as a lenght-encoded integer,
- column charset as a length-encoded integer.
The order is the same as the order of column_type
field.
COLUMN_CHARSET = 3
Character set of string columns.
This field should not appear with DEFAULT_CHARSET
.
§Value format
- for every character column:
- column charset as a length-encoded integer.
The order is the same as the order of column_type
field.
COLUMN_NAME = 4
Collumn name of columns (included if binlog_row_metadata=FULL
).
§Value format
- for every column:
- column name as a length-encoded string.
The order is the same as the order of column_type
field.
SET_STR_VALUE = 5
Name of each variant in a SET columns.
§Value format
- for every SET column:
- number of variants as a length-encoded integer,
- for each variant:
- name of a variant as a length-encoded string.
The order is the same as the order of column_type
field.
ENUM_STR_VALUE = 6
Name of each variant in an ENUM columns.
§Value format
- for every ENUM column:
- number of variants as a length-encoded integer,
- for each variant:
- name of a variant as a length-encoded string.
The order is the same as the order of column_type
field.
GEOMETRY_TYPE = 7
Real type of geometry columns.
§Value format
- for every geometry column:
- geometry type as a length-encoded integer.
The order is the same as the order of column_type
field.
SIMPLE_PRIMARY_KEY = 8
Primary key without prefix (included if binlog_row_metadata=FULL
).
This field should not appear with PRIMARY_KEY_WITH_PREFIX
.
§Value format
- for every PK index column:
- column index as a length-encoded integer.
The order is the same as the order of column_type
field.
PRIMARY_KEY_WITH_PREFIX = 9
Primary key with prefix (included if binlog_row_metadata=FULL
).
This field should not appear with SIMPLE_PRIMARY_KEY
.
§Value format
- for every PK index column:
- column index as a length-encoded integer,
- prefix length as a length-encoded integer
The order is the same as the order of column_type
field.
§Note
- prefix length is a character length, i.e. prefix byte length divided by the maximum length of a character in the correspoding charset;
- prefix length
0
means that the whole column value is used.
ENUM_AND_SET_DEFAULT_CHARSET = 10
Character set of enum and set columns.
This field should not appear with ENUM_AND_SET_COLUMN_CHARSET
.
§Value format
- default charset as a lenght-encoded integer,
- then for every SET or ENUM column which charset isn’t default:
- column index as a lenght-encoded integer,
- column charset as a length-encoded integer.
The order is the same as the order of column_type
field.
ENUM_AND_SET_COLUMN_CHARSET = 11
Character set of enum and set columns.
This field should not appear with ENUM_AND_SET_DEFAULT_CHARSET
.
§Value format
- for every SET or ENUM column:
- column charset as a length-encoded integer.
The order is the same as the order of column_type
field.
COLUMN_VISIBILITY = 12
A flag that indicates column visibility attribute.
Trait Implementations§
source§impl Clone for OptionalMetadataFieldType
impl Clone for OptionalMetadataFieldType
source§fn clone(&self) -> OptionalMetadataFieldType
fn clone(&self) -> OptionalMetadataFieldType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for OptionalMetadataFieldType
impl Debug for OptionalMetadataFieldType
source§impl Hash for OptionalMetadataFieldType
impl Hash for OptionalMetadataFieldType
source§impl TryFrom<u8> for OptionalMetadataFieldType
impl TryFrom<u8> for OptionalMetadataFieldType
impl Copy for OptionalMetadataFieldType
impl Eq for OptionalMetadataFieldType
impl StructuralPartialEq for OptionalMetadataFieldType
Auto Trait Implementations§
impl Freeze for OptionalMetadataFieldType
impl RefUnwindSafe for OptionalMetadataFieldType
impl Send for OptionalMetadataFieldType
impl Sync for OptionalMetadataFieldType
impl Unpin for OptionalMetadataFieldType
impl UnwindSafe for OptionalMetadataFieldType
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T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
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default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
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