tidb: github.com/pingcap/tidb/types/json Index | Files

package json

import "github.com/pingcap/tidb/types/json"

Index

Package Files

binary.go binary_functions.go constants.go path_expr.go

Constants

const (
    // LiteralNil represents JSON null.
    LiteralNil byte = 0x00
    // LiteralTrue represents JSON true.
    LiteralTrue byte = 0x01
    // LiteralFalse represents JSON false.
    LiteralFalse byte = 0x02
)
const (
    // 'all': 1 if all paths exist within the document, 0 otherwise.
    ContainsPathAll = "all"
    // 'one': 1 if at least one path exists within the document, 0 otherwise.
    ContainsPathOne = "one"
)

json_contains_path function type choices See: https://dev.mysql.com/doc/refman/5.7/en/json-search-functions.html#function_json-contains-path

Variables

var (
    // ErrInvalidJSONText means invalid JSON text.
    ErrInvalidJSONText = terror.ClassJSON.New(mysql.ErrInvalidJSONText, mysql.MySQLErrName[mysql.ErrInvalidJSONText])
    // ErrInvalidJSONPath means invalid JSON path.
    ErrInvalidJSONPath = terror.ClassJSON.New(mysql.ErrInvalidJSONPath, mysql.MySQLErrName[mysql.ErrInvalidJSONPath])
    // ErrInvalidJSONData means invalid JSON data.
    ErrInvalidJSONData = terror.ClassJSON.New(mysql.ErrInvalidJSONData, mysql.MySQLErrName[mysql.ErrInvalidJSONData])
    // ErrInvalidJSONPathWildcard means invalid JSON path that contain wildcard characters.
    ErrInvalidJSONPathWildcard = terror.ClassJSON.New(mysql.ErrInvalidJSONPathWildcard, mysql.MySQLErrName[mysql.ErrInvalidJSONPathWildcard])
    // ErrInvalidJSONContainsPathType means invalid JSON contains path type.
    ErrInvalidJSONContainsPathType = terror.ClassJSON.New(mysql.ErrInvalidJSONContainsPathType, mysql.MySQLErrName[mysql.ErrInvalidJSONContainsPathType])
    // ErrInvalidJSONPathArrayCell means invalid JSON path for an array cell.
    ErrInvalidJSONPathArrayCell = terror.ClassJSON.New(mysql.ErrInvalidJSONPathArrayCell, mysql.MySQLErrName[mysql.ErrInvalidJSONPathArrayCell])
)

func CompareBinary Uses

func CompareBinary(left, right BinaryJSON) int

CompareBinary compares two binary json objects. Returns -1 if left < right, 0 if left == right, else returns 1.

func ContainsBinary Uses

func ContainsBinary(obj, target BinaryJSON) bool

ContainsBinary check whether JSON document contains specific target according the following rules: 1) object contains a target object if and only if every key is contained in source object and the value associated with the target key is contained in the value associated with the source key; 2) array contains a target nonarray if and only if the target is contained in some element of the array; 3) array contains a target array if and only if every element is contained in some element of the array; 4) scalar contains a target scalar if and only if they are comparable and are equal;

func PeekBytesAsJSON Uses

func PeekBytesAsJSON(b []byte) (n int, err error)

PeekBytesAsJSON trys to peek some bytes from b, until we can deserialize a JSON from those bytes.

type BinaryJSON Uses

type BinaryJSON struct {
    TypeCode TypeCode
    Value    []byte
}

BinaryJSON represents a binary encoded JSON object. It can be randomly accessed without deserialization.

func CreateBinary Uses

func CreateBinary(in interface{}) BinaryJSON

CreateBinary creates a BinaryJSON from interface.

func MergeBinary Uses

func MergeBinary(bjs []BinaryJSON) BinaryJSON

MergeBinary merges multiple BinaryJSON into one according the following rules: 1) adjacent arrays are merged to a single array; 2) adjacent object are merged to a single object; 3) a scalar value is autowrapped as an array before merge; 4) an adjacent array and object are merged by autowrapping the object as an array.

func ParseBinaryFromString Uses

func ParseBinaryFromString(s string) (bj BinaryJSON, err error)

ParseBinaryFromString parses a json from string.

func (BinaryJSON) ArrayInsert Uses

func (bj BinaryJSON) ArrayInsert(pathExpr PathExpression, value BinaryJSON) (res BinaryJSON, err error)

ArrayInsert insert a BinaryJSON into the given array cell. All path expressions cannot contain * or ** wildcard. If any error occurs, the input won't be changed.

func (BinaryJSON) Copy Uses

func (bj BinaryJSON) Copy() BinaryJSON

Copy makes a copy of the BinaryJSON

func (BinaryJSON) Extract Uses

func (bj BinaryJSON) Extract(pathExprList []PathExpression) (ret BinaryJSON, found bool)

Extract receives several path expressions as arguments, matches them in bj, and returns:

ret: target JSON matched any path expressions. maybe autowrapped as an array.
found: true if any path expressions matched.

func (BinaryJSON) GetElemCount Uses

func (bj BinaryJSON) GetElemCount() int

GetElemCount gets the count of Object or Array.

func (BinaryJSON) GetElemDepth Uses

func (bj BinaryJSON) GetElemDepth() int

GetElemDepth for JSON_DEPTH Returns the maximum depth of a JSON document rules referenced by MySQL JSON_DEPTH function [https://dev.mysql.com/doc/refman/5.7/en/json-attribute-functions.html#function_json-depth] 1) An empty array, empty object, or scalar value has depth 1. 2) A nonempty array containing only elements of depth 1 or nonempty object containing only member values of depth 1 has depth 2. 3) Otherwise, a JSON document has depth greater than 2. e.g. depth of '{}', '[]', 'true': 1 e.g. depth of '[10, 20]', '[[], {}]': 2 e.g. depth of '[10, {"a": 20}]': 3

func (BinaryJSON) GetFloat64 Uses

func (bj BinaryJSON) GetFloat64() float64

GetFloat64 gets the float64 value.

func (BinaryJSON) GetInt64 Uses

func (bj BinaryJSON) GetInt64() int64

GetInt64 gets the int64 value.

func (BinaryJSON) GetKeys Uses

func (bj BinaryJSON) GetKeys() BinaryJSON

GetKeys gets the keys of the object

func (BinaryJSON) GetString Uses

func (bj BinaryJSON) GetString() []byte

GetString gets the string value.

func (BinaryJSON) GetUint64 Uses

func (bj BinaryJSON) GetUint64() uint64

GetUint64 gets the uint64 value.

func (BinaryJSON) MarshalJSON Uses

func (bj BinaryJSON) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaler interface.

func (BinaryJSON) Modify Uses

func (bj BinaryJSON) Modify(pathExprList []PathExpression, values []BinaryJSON, mt ModifyType) (retj BinaryJSON, err error)

Modify modifies a JSON object by insert, replace or set. All path expressions cannot contain * or ** wildcard. If any error occurs, the input won't be changed.

func (BinaryJSON) Quote Uses

func (bj BinaryJSON) Quote() string

Quote is for JSON_QUOTE

func (BinaryJSON) Remove Uses

func (bj BinaryJSON) Remove(pathExprList []PathExpression) (BinaryJSON, error)

Remove removes the elements indicated by pathExprList from JSON.

func (BinaryJSON) String Uses

func (bj BinaryJSON) String() string

String implements fmt.Stringer interface.

func (BinaryJSON) Type Uses

func (bj BinaryJSON) Type() string

Type returns type of BinaryJSON as string.

func (*BinaryJSON) UnmarshalJSON Uses

func (bj *BinaryJSON) UnmarshalJSON(data []byte) error

UnmarshalJSON implements the json.Unmarshaler interface.

func (BinaryJSON) Unquote Uses

func (bj BinaryJSON) Unquote() (string, error)

Unquote is for JSON_UNQUOTE.

func (BinaryJSON) Walk Uses

func (bj BinaryJSON) Walk(walkFn BinaryJSONWalkFunc, pathExprList ...PathExpression) (err error)

Walk traverse BinaryJSON objects

type BinaryJSONWalkFunc Uses

type BinaryJSONWalkFunc func(fullpath PathExpression, bj BinaryJSON) (stop bool, err error)

BinaryJSONWalkFunc is used as callback function for BinaryJSON.Walk

type ModifyType Uses

type ModifyType byte

ModifyType is for modify a JSON. There are three valid values: ModifyInsert, ModifyReplace and ModifySet.

const (
    // ModifyInsert is for insert a new element into a JSON.
    ModifyInsert ModifyType = 0x01
    // ModifyReplace is for replace an old elemList from a JSON.
    ModifyReplace ModifyType = 0x02
    // ModifySet = ModifyInsert | ModifyReplace
    ModifySet ModifyType = 0x03
)

type PathExpression Uses

type PathExpression struct {
    // contains filtered or unexported fields
}

PathExpression is for JSON path expression.

func ParseJSONPathExpr Uses

func ParseJSONPathExpr(pathExpr string) (pe PathExpression, err error)

ParseJSONPathExpr parses a JSON path expression. Returns a PathExpression object which can be used in JSON_EXTRACT, JSON_SET and so on.

func (PathExpression) ContainsAnyAsterisk Uses

func (pe PathExpression) ContainsAnyAsterisk() bool

ContainsAnyAsterisk returns true if pe contains any asterisk.

func (PathExpression) String Uses

func (pe PathExpression) String() string

type TypeCode Uses

type TypeCode = byte

TypeCode indicates JSON type.

const (
    // TypeCodeObject indicates the JSON is an object.
    TypeCodeObject TypeCode = 0x01
    // TypeCodeArray indicates the JSON is an array.
    TypeCodeArray TypeCode = 0x03
    // TypeCodeLiteral indicates the JSON is a literal.
    TypeCodeLiteral TypeCode = 0x04
    // TypeCodeInt64 indicates the JSON is a signed integer.
    TypeCodeInt64 TypeCode = 0x09
    // TypeCodeUint64 indicates the JSON is a unsigned integer.
    TypeCodeUint64 TypeCode = 0x0a
    // TypeCodeFloat64 indicates the JSON is a double float number.
    TypeCodeFloat64 TypeCode = 0x0b
    // TypeCodeString indicates the JSON is a string.
    TypeCodeString TypeCode = 0x0c
)

Package json imports 17 packages (graph) and is imported by 95 packages. Updated 2019-09-01. Refresh now. Tools for package owners.