mirror of
https://github.com/chrislusf/seaweedfs
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102 lines
2.8 KiB
Go
102 lines
2.8 KiB
Go
package sqltypes
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// These bit flags can be used to query on the
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// common properties of types.
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const (
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flagIsIntegral = int(Flag_ISINTEGRAL)
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flagIsUnsigned = int(Flag_ISUNSIGNED)
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flagIsFloat = int(Flag_ISFLOAT)
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flagIsQuoted = int(Flag_ISQUOTED)
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flagIsText = int(Flag_ISTEXT)
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flagIsBinary = int(Flag_ISBINARY)
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)
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// IsIntegral returns true if Type is an integral
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// (signed/unsigned) that can be represented using
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// up to 64 binary bits.
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// If you have a Value object, use its member function.
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func IsIntegral(t Type) bool {
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return int(t)&flagIsIntegral == flagIsIntegral
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}
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// IsSigned returns true if Type is a signed integral.
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// If you have a Value object, use its member function.
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func IsSigned(t Type) bool {
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return int(t)&(flagIsIntegral|flagIsUnsigned) == flagIsIntegral
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}
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// IsUnsigned returns true if Type is an unsigned integral.
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// Caution: this is not the same as !IsSigned.
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// If you have a Value object, use its member function.
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func IsUnsigned(t Type) bool {
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return int(t)&(flagIsIntegral|flagIsUnsigned) == flagIsIntegral|flagIsUnsigned
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}
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// IsFloat returns true is Type is a floating point.
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// If you have a Value object, use its member function.
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func IsFloat(t Type) bool {
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return int(t)&flagIsFloat == flagIsFloat
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}
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// IsQuoted returns true if Type is a quoted text or binary.
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// If you have a Value object, use its member function.
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func IsQuoted(t Type) bool {
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return (int(t)&flagIsQuoted == flagIsQuoted) && t != Bit
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}
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// IsText returns true if Type is a text.
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// If you have a Value object, use its member function.
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func IsText(t Type) bool {
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return int(t)&flagIsText == flagIsText
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}
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// IsBinary returns true if Type is a binary.
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// If you have a Value object, use its member function.
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func IsBinary(t Type) bool {
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return int(t)&flagIsBinary == flagIsBinary
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}
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// isNumber returns true if the type is any type of number.
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func isNumber(t Type) bool {
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return IsIntegral(t) || IsFloat(t) || t == Decimal
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}
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// IsTemporal returns true if Value is time type.
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func IsTemporal(t Type) bool {
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switch t {
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case Timestamp, Date, Time, Datetime:
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return true
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}
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return false
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}
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// Vitess data types. These are idiomatically
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// named synonyms for the Type values.
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const (
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Null = Type_NULL_TYPE
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Int8 = Type_INT8
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Uint8 = Type_UINT8
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Int16 = Type_INT16
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Uint16 = Type_UINT16
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Int32 = Type_INT32
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Uint32 = Type_UINT32
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Int64 = Type_INT64
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Uint64 = Type_UINT64
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Float32 = Type_FLOAT32
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Float64 = Type_FLOAT64
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Timestamp = Type_TIMESTAMP
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Date = Type_DATE
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Time = Type_TIME
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Datetime = Type_DATETIME
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Year = Type_YEAR
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Decimal = Type_DECIMAL
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Text = Type_TEXT
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Blob = Type_BLOB
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VarChar = Type_VARCHAR
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VarBinary = Type_VARBINARY
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Char = Type_CHAR
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Binary = Type_BINARY
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Bit = Type_BIT
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TypeJSON = Type_JSON
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)
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