Enum mysql::binlog::OptionalMetadataFieldType [−][src]
#[repr(u8)]
pub enum OptionalMetadataFieldType {
SIGNEDNESS,
DEFAULT_CHARSET,
COLUMN_CHARSET,
COLUMN_NAME,
SET_STR_VALUE,
ENUM_STR_VALUE,
GEOMETRY_TYPE,
SIMPLE_PRIMARY_KEY,
PRIMARY_KEY_WITH_PREFIX,
ENUM_AND_SET_DEFAULT_CHARSET,
ENUM_AND_SET_COLUMN_CHARSET,
COLUMN_VISIBILITY,
}
Expand description
Enumerates types of optional metadata fields.
Variants
SIGNEDNESS
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
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
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
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
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
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
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
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
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
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
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
A flag that indicates column visibility attribute.
Trait Implementations
The type returned in the event of a conversion error.
pub fn try_from(
value: u8
) -> Result<OptionalMetadataFieldType, <OptionalMetadataFieldType as TryFrom<u8>>::Error>
pub fn try_from(
value: u8
) -> Result<OptionalMetadataFieldType, <OptionalMetadataFieldType as TryFrom<u8>>::Error>
Performs the conversion.
Auto Trait Implementations
impl RefUnwindSafe for OptionalMetadataFieldType
impl Send for OptionalMetadataFieldType
impl Sync for OptionalMetadataFieldType
impl Unpin for OptionalMetadataFieldType
impl UnwindSafe for OptionalMetadataFieldType
Blanket Implementations
Mutably borrows from an owned value. Read more
fn fmt_binary(self) -> FmtBinary<Self> where
Self: Binary,
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Self: Binary,
Causes self
to use its Binary
implementation when Debug
-formatted.
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Self: Display,
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Self: Display,
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fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
Self: LowerExp,
fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
Self: LowerExp,
Causes self
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Debug
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fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
Self: LowerHex,
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Self: LowerHex,
Causes self
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Debug
-formatted. Read more
Causes self
to use its Octal
implementation when Debug
-formatted.
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Self: UpperExp,
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Self: UpperExp,
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Self: UpperHex,
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Self: UpperHex,
Causes self
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Debug
-formatted. Read more
pub fn lift_into(self) -> U
pub fn lift_into(self) -> U
Performs the indexed conversion.
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T: ?Sized,
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