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Package spansql contains types and a parser for the Cloud Spanner SQL dialect.
To parse, use one of the Parse functions (ParseDDL, ParseDDLStmt, ParseQuery, etc.).
Sources:
https : //cloud.google.com/spanner/docs/lexical https : //cloud.google.com/spanner/docs/query-syntax https : //cloud.google.com/spanner/docs/data-definition-language
Constants
True, False
const
(
True
=
BoolLiteral
(
true
)
False
=
BoolLiteral
(
false
)
)
MaxLen
MaxLen is a sentinel for Type's Len field, representing the MAX value.
Null
const
Null
=
NullLiteral
(
0
)
Star
const
Star
=
StarExpr
(
0
)
Star represents a "*" in an expression.
Functions
func IsKeyword
IsKeyword reports whether the identifier is a reserved keyword.
AddColumn
type
AddColumn
struct
{
Def
ColumnDef
}
func (AddColumn) SQL
AddConstraint
type
AddConstraint
struct
{
Constraint
TableConstraint
}
func (AddConstraint) SQL
func
(
ac
AddConstraint
)
SQL
()
string
AddRowDeletionPolicy
type
AddRowDeletionPolicy
struct
{
RowDeletionPolicy
RowDeletionPolicy
}
func (AddRowDeletionPolicy) SQL
func
(
ardp
AddRowDeletionPolicy
)
SQL
()
string
AlterChangeStream
type
AlterChangeStream
struct
{
Name
ID
Alteration
ChangeStreamAlteration
Position
Position
}
AlterChangeStream represents a ALTER CHANGE STREAM statement.
func (*AlterChangeStream) Pos
func
(
acs
*
AlterChangeStream
)
Pos
()
Position
func (AlterChangeStream) SQL
func
(
acs
AlterChangeStream
)
SQL
()
string
func (*AlterChangeStream) String
func
(
acs
*
AlterChangeStream
)
String
()
string
AlterChangeStreamOptions
type
AlterChangeStreamOptions
struct
{
Options
ChangeStreamOptions
}
func (AlterChangeStreamOptions) SQL
func
(
ao
AlterChangeStreamOptions
)
SQL
()
string
AlterColumn
type
AlterColumn
struct
{
Name
ID
Alteration
ColumnAlteration
}
func (AlterColumn) SQL
func
(
ac
AlterColumn
)
SQL
()
string
AlterDatabase
type
AlterDatabase
struct
{
Name
ID
Alteration
DatabaseAlteration
Position
Position
// position of the "ALTER" token
}
AlterDatabase represents an ALTER DATABASE statement. https://cloud.google.com/spanner/docs/data-definition-language#alter-database
func (*AlterDatabase) Pos
func
(
ad
*
AlterDatabase
)
Pos
()
Position
func (AlterDatabase) SQL
func
(
ad
AlterDatabase
)
SQL
()
string
func (*AlterDatabase) String
func
(
ad
*
AlterDatabase
)
String
()
string
AlterTable
type
AlterTable
struct
{
Name
ID
Alteration
TableAlteration
Position
Position
// position of the "ALTER" token
}
AlterTable represents an ALTER TABLE statement. https://cloud.google.com/spanner/docs/data-definition-language#alter_table
func (*AlterTable) Pos
func
(
at
*
AlterTable
)
Pos
()
Position
func (AlterTable) SQL
func
(
at
AlterTable
)
SQL
()
string
func (*AlterTable) String
func
(
at
*
AlterTable
)
String
()
string
AlterWatch
type
AlterWatch
struct
{
Watch
[]
WatchDef
}
ArithOp
type
ArithOp
struct
{
Op
ArithOperator
LHS
,
RHS
Expr
// only RHS is set for Neg, Plus, BitNot
}
func (ArithOp) SQL
ArithOperator
type
ArithOperator
int
Neg, Plus, BitNot, Mul, Div, Concat, Add, Sub, BitShl, BitShr, BitAnd, BitXor, BitOr
const
(
Neg
ArithOperator
=
iota
// unary -
Plus
// unary +
BitNot
// unary ~
Mul
// *
Div
// /
Concat
// ||
Add
// +
Sub
// -
BitShl
// < bitshr="">
>
BitAnd
//
&
BitXor
// ^
BitOr
// |
)
Array
type
Array
[]
Expr
Array represents an array literal.
func (Array) SQL
AtTimeZoneExpr
func (AtTimeZoneExpr) SQL
func
(
aze
AtTimeZoneExpr
)
SQL
()
string
BoolExpr
type
BoolExpr
interface
{
Expr
// contains filtered or unexported methods
}
BoolLiteral
type
BoolLiteral
bool
func (BoolLiteral) SQL
func
(
b
BoolLiteral
)
SQL
()
string
BytesLiteral
type
BytesLiteral
string
BytesLiteral represents a bytes literal. https://cloud.google.com/spanner/docs/lexical#string-and-bytes-literals
func (BytesLiteral) SQL
func
(
bl
BytesLiteral
)
SQL
()
string
Case
type
Case
struct
{
Expr
Expr
WhenClauses
[]
WhenClause
ElseResult
Expr
}
func (Case) SQL
ChangeStreamAlteration
type
ChangeStreamAlteration
interface
{
SQL
()
string
// contains filtered or unexported methods
}
ChangeStreamOptions
type
ChangeStreamOptions
struct
{
RetentionPeriod
*
string
}
Check
Check represents a check constraint as part of a CREATE TABLE or ALTER TABLE statement.
func (Check) Pos
func (Check) SQL
Coalesce
type
Coalesce
struct
{
ExprList
[]
Expr
}
func (Coalesce) SQL
ColumnAlteration
type
ColumnAlteration
interface
{
SQL
()
string
// contains filtered or unexported methods
}
ColumnAlteration is satisfied by SetColumnType and SetColumnOptions.
ColumnDef
type
ColumnDef
struct
{
Name
ID
Type
Type
NotNull
bool
Default
Expr
// set if this column has a default value
Generated
Expr
// set of this is a generated column
Options
ColumnOptions
Position
Position
// position of the column name
}
ColumnDef represents a column definition as part of a CREATE TABLE or ALTER TABLE statement.
func (ColumnDef) Pos
func (ColumnDef) SQL
ColumnOptions
type
ColumnOptions
struct
{
// AllowCommitTimestamp represents a column OPTIONS.
// `true` if query is `OPTIONS (allow_commit_timestamp = true)`
// `false` if query is `OPTIONS (allow_commit_timestamp = null)`
// `nil` if there are no OPTIONS
AllowCommitTimestamp
*
bool
}
ColumnOptions represents options on a column as part of a CREATE TABLE or ALTER TABLE statement.
func (ColumnOptions) SQL
func
(
co
ColumnOptions
)
SQL
()
string
Comment
type
Comment
struct
{
Marker
string
// Opening marker; one of "#", "--", "/*".
Isolated
bool
// Whether this comment is on its own line.
// Start and End are the position of the opening and terminating marker.
Start
,
End
Position
Text
[]
string
}
Comment represents a comment.
func (*Comment) Pos
func (*Comment) String
ComparisonOp
type
ComparisonOp
struct
{
Op
ComparisonOperator
LHS
,
RHS
Expr
// RHS2 is the third operand for BETWEEN.
// "
func (ComparisonOp) SQL
func
(
co
ComparisonOp
)
SQL
()
string
ComparisonOperator
type
ComparisonOperator
int
Lt, Le, Gt, Ge, Eq, Ne, Like, NotLike, Between, NotBetween
const
(
Lt
ComparisonOperator
=
iota
Le
Gt
Ge
Eq
Ne
// both "!=" and "<>"
Like
NotLike
Between
NotBetween
)
Constraint
CreateChangeStream
type
CreateChangeStream
struct
{
Name
ID
Watch
[]
WatchDef
WatchAllTables
bool
Options
ChangeStreamOptions
Position
Position
}
CreateChangeStream represents a CREATE CHANGE STREAM statement. https://cloud.google.com/spanner/docs/change-streams/manage
func (*CreateChangeStream) Pos
func
(
cs
*
CreateChangeStream
)
Pos
()
Position
func (CreateChangeStream) SQL
func
(
cs
CreateChangeStream
)
SQL
()
string
func (*CreateChangeStream) String
func
(
cs
*
CreateChangeStream
)
String
()
string
CreateIndex
type
CreateIndex
struct
{
Name
ID
Table
ID
Columns
[]
KeyPart
Unique
bool
NullFiltered
bool
Storing
[]
ID
Interleave
ID
Position
Position
// position of the "CREATE" token
}
CreateIndex represents a CREATE INDEX statement. https://cloud.google.com/spanner/docs/data-definition-language#create-index
func (*CreateIndex) Pos
func
(
ci
*
CreateIndex
)
Pos
()
Position
func (CreateIndex) SQL
func
(
ci
CreateIndex
)
SQL
()
string
func (*CreateIndex) String
func
(
ci
*
CreateIndex
)
String
()
string
CreateTable
type
CreateTable
struct
{
Name
ID
Columns
[]
ColumnDef
Constraints
[]
TableConstraint
PrimaryKey
[]
KeyPart
Interleave
*
Interleave
RowDeletionPolicy
*
RowDeletionPolicy
Position
Position
// position of the "CREATE" token
}
CreateTable represents a CREATE TABLE statement. https://cloud.google.com/spanner/docs/data-definition-language#create_table
func (*CreateTable) Pos
func
(
ct
*
CreateTable
)
Pos
()
Position
func (CreateTable) SQL
func
(
ct
CreateTable
)
SQL
()
string
func (*CreateTable) String
func
(
ct
*
CreateTable
)
String
()
string
CreateView
type
CreateView
struct
{
Name
ID
OrReplace
bool
Query
Query
Position
Position
// position of the "CREATE" token
}
CreateView represents a CREATE [OR REPLACE] VIEW statement. https://cloud.google.com/spanner/docs/data-definition-language#view_statements
func (*CreateView) Pos
func
(
cv
*
CreateView
)
Pos
()
Position
func (CreateView) SQL
func
(
cv
CreateView
)
SQL
()
string
func (*CreateView) String
func
(
cv
*
CreateView
)
String
()
string
DDL
type
DDL
struct
{
List
[]
DDLStmt
Filename
string
// if known at parse time
Comments
[]
*
Comment
// all comments, sorted by position
}
DDL represents a Data Definition Language (DDL) file.
func ParseDDL
ParseDDL parses a DDL file.
The provided filename is used for error reporting and will appear in the returned structure.
func (*DDL) InlineComment
InlineComment returns the comment on the same line as a node, or nil if there's no inline comment. The returned comment is guaranteed to be a single line.
func (*DDL) LeadingComment
LeadingComment returns the comment that immediately precedes a node, or nil if there's no such comment.
DDLStmt
DDLStmt is satisfied by a type that can appear in a DDL.
func ParseDDLStmt
ParseDDLStmt parses a single DDL statement.
DML
type
DML
struct
{
List
[]
DMLStmt
Filename
string
// if known at parse time
Comments
[]
*
Comment
// all comments, sorted by position
}
DML represents a Data Manipulation Language (DML) file.
func ParseDML
ParseDML parses a DML file.
The provided filename is used for error reporting and will appear in the returned structure.
func (*DML) InlineComment
InlineComment returns the comment on the same line as a node, or nil if there's no inline comment. The returned comment is guaranteed to be a single line.
func (*DML) LeadingComment
LeadingComment returns the comment that immediately precedes a node, or nil if there's no such comment.
DMLStmt
type
DMLStmt
interface
{
SQL
()
string
// contains filtered or unexported methods
}
DMLStmt is satisfied by a type that is a DML statement.
func ParseDMLStmt
ParseDMLStmt parses a single DML statement.
DatabaseAlteration
type
DatabaseAlteration
interface
{
SQL
()
string
// contains filtered or unexported methods
}
DatabaseOptions
type
DatabaseOptions
struct
{
OptimizerVersion
*
int
VersionRetentionPeriod
*
string
EnableKeyVisualizer
*
bool
}
DatabaseOptions represents options on a database as part of a ALTER DATABASE statement.
func (DatabaseOptions) SQL
func
(
do
DatabaseOptions
)
SQL
()
string
DateLiteral
DateLiteral represents a date literal. https://cloud.google.com/spanner/docs/lexical#date_literals
func (DateLiteral) SQL
func
(
dl
DateLiteral
)
SQL
()
string
Delete
Delete represents a DELETE statement. https://cloud.google.com/spanner/docs/dml-syntax#delete-statement
func (*Delete) SQL
func (*Delete) String
DropChangeStream
DropChangeStream represents a DROP CHANGE STREAM statement.
func (*DropChangeStream) Pos
func
(
dc
*
DropChangeStream
)
Pos
()
Position
func (DropChangeStream) SQL
func
(
dc
DropChangeStream
)
SQL
()
string
func (*DropChangeStream) String
func
(
dc
*
DropChangeStream
)
String
()
string
DropColumn
type
DropColumn
struct
{
Name
ID
}
func (DropColumn) SQL
func
(
dc
DropColumn
)
SQL
()
string
DropConstraint
type
DropConstraint
struct
{
Name
ID
}
func (DropConstraint) SQL
func
(
dc
DropConstraint
)
SQL
()
string
DropDefault
type
DropDefault
struct
{}
func (DropDefault) SQL
func
(
dp
DropDefault
)
SQL
()
string
DropIndex
DropIndex represents a DROP INDEX statement. https://cloud.google.com/spanner/docs/data-definition-language#drop-index
func (*DropIndex) Pos
func (DropIndex) SQL
func (*DropIndex) String
DropRowDeletionPolicy
type
DropRowDeletionPolicy
struct
{}
func (DropRowDeletionPolicy) SQL
func
(
drdp
DropRowDeletionPolicy
)
SQL
()
string
DropTable
DropTable represents a DROP TABLE statement. https://cloud.google.com/spanner/docs/data-definition-language#drop_table
func (*DropTable) Pos
func (DropTable) SQL
func (*DropTable) String
DropView
DropView represents a DROP VIEW statement. https://cloud.google.com/spanner/docs/data-definition-language#drop-view
func (*DropView) Pos
func (DropView) SQL
func (*DropView) String
Expr
type
Expr
interface
{
SQL
()
string
// contains filtered or unexported methods
}
ExtractExpr
func (ExtractExpr) SQL
func
(
ee
ExtractExpr
)
SQL
()
string
FloatLiteral
type
FloatLiteral
float64
FloatLiteral represents a floating point literal. https://cloud.google.com/spanner/docs/lexical#floating-point-literals
func (FloatLiteral) SQL
func
(
fl
FloatLiteral
)
SQL
()
string
ForeignKey
type
ForeignKey
struct
{
Columns
[]
ID
RefTable
ID
RefColumns
[]
ID
Position
Position
// position of the "FOREIGN" token
}
ForeignKey represents a foreign key definition as part of a CREATE TABLE or ALTER TABLE statement.
func (ForeignKey) Pos
func
(
fk
ForeignKey
)
Pos
()
Position
func (ForeignKey) SQL
func
(
fk
ForeignKey
)
SQL
()
string
Func
Func represents a function call.
func (Func) SQL
ID
type
ID
string
ID represents an identifier. https://cloud.google.com/spanner/docs/lexical#identifiers
func (ID) SQL
If
func (If) SQL
IfNull
func (IfNull) SQL
InOp
func (InOp) SQL
Insert
type
Insert
struct
{
Table
ID
Columns
[]
ID
Input
ValuesOrSelect
}
Insert represents an INSERT statement. https://cloud.google.com/spanner/docs/dml-syntax#insert-statement
func (*Insert) SQL
func (*Insert) String
IntegerLiteral
type
IntegerLiteral
int64
IntegerLiteral represents an integer literal. https://cloud.google.com/spanner/docs/lexical#integer-literals
func (IntegerLiteral) SQL
func
(
il
IntegerLiteral
)
SQL
()
string
Interleave
Interleave represents an interleave clause of a CREATE TABLE statement.
IntervalExpr
func (IntervalExpr) SQL
func
(
ie
IntervalExpr
)
SQL
()
string
IsExpr
type
IsExpr
interface
{
Expr
// contains filtered or unexported methods
}
IsOp
func (IsOp) SQL
JSONLiteral
type
JSONLiteral
[]
byte
JSONLiteral represents a JSON literal https://cloud.google.com/spanner/docs/reference/standard-sql/lexical#json_literals
func (JSONLiteral) SQL
func
(
jl
JSONLiteral
)
SQL
()
string
JoinType
type
JoinType
int
InnerJoin, CrossJoin, FullJoin, LeftJoin, RightJoin
KeyPart
KeyPart represents a column specification as part of a primary key or index definition.
func (KeyPart) SQL
LiteralOrParam
type
LiteralOrParam
interface
{
SQL
()
string
// contains filtered or unexported methods
}
LiteralOrParam is implemented by integer literal and parameter values.
LogicalOp
type
LogicalOp
struct
{
Op
LogicalOperator
LHS
,
RHS
BoolExpr
// only RHS is set for Not
}
func (LogicalOp) SQL
LogicalOperator
type
LogicalOperator
int
And, Or, Not
const
(
And
LogicalOperator
=
iota
Or
Not
)
Node
type
Node
interface
{
Pos
()
Position
}
Node is implemented by concrete types in this package that represent things appearing in a DDL file.
NullIf
func (NullIf) SQL
NullLiteral
type
NullLiteral
int
func (NullLiteral) SQL
func
(
NullLiteral
)
SQL
()
string
OnDelete
type
OnDelete
int
NoActionOnDelete, CascadeOnDelete
func (OnDelete) SQL
Order
func (Order) SQL
Param
type
Param
string
Param represents a query parameter.
func (Param) SQL
Paren
type
Paren
struct
{
Expr
Expr
}
Paren represents a parenthesised expression.
func (Paren) SQL
PathExp
type
PathExp
[]
ID
PathExp represents a path expression.
The grammar for path expressions is not defined (see b/169017423 internally), so this captures the most common form only, namely a dotted sequence of identifiers.
func (PathExp) SQL
Position
Position describes a source position in an input DDL file. It is only valid if the line number is positive.
func (Position) IsValid
func (Position) String
Query
type
Query
struct
{
Select
Select
Order
[]
Order
Limit
,
Offset
LiteralOrParam
}
Query represents a query statement. https://cloud.google.com/spanner/docs/query-syntax#sql-syntax
func ParseQuery
ParseQuery parses a query string.
func (Query) SQL
ReplaceRowDeletionPolicy
type
ReplaceRowDeletionPolicy
struct
{
RowDeletionPolicy
RowDeletionPolicy
}
func (ReplaceRowDeletionPolicy) SQL
func
(
rrdp
ReplaceRowDeletionPolicy
)
SQL
()
string
RowDeletionPolicy
RowDeletionPolicy represents an row deletion policy clause of a CREATE, ALTER TABLE statement.
func (RowDeletionPolicy) SQL
func
(
rdp
RowDeletionPolicy
)
SQL
()
string
Select
type
Select
struct
{
Distinct
bool
List
[]
Expr
From
[]
SelectFrom
Where
BoolExpr
GroupBy
[]
Expr
// When the FROM clause has TABLESAMPLE operators,
// TableSamples will be populated 1:1 with From;
// FROM clauses without will have a nil value.
TableSamples
[]
*
TableSample
// If the SELECT list has explicit aliases ("AS alias"),
// ListAliases will be populated 1:1 with List;
// aliases that are present will be non-empty.
ListAliases
[]
ID
}
Select represents a SELECT statement. https://cloud.google.com/spanner/docs/query-syntax#select-list
func (Select) SQL
SelectFrom
type
SelectFrom
interface
{
SQL
()
string
// contains filtered or unexported methods
}
SelectFrom represents the FROM clause of a SELECT. https://cloud.google.com/spanner/docs/query-syntax#from_clause
SelectFromJoin
type
SelectFromJoin
struct
{
Type
JoinType
LHS
,
RHS
SelectFrom
// Join condition.
// At most one of {On,Using} may be set.
On
BoolExpr
Using
[]
ID
// Hints are suggestions for how to evaluate a join.
// https://cloud.google.com/spanner/docs/query-syntax#join-hints
Hints
map
[
string
]
string
}
SelectFromJoin is a SelectFrom that joins two other SelectFroms. https://cloud.google.com/spanner/docs/query-syntax#join_types
func (SelectFromJoin) SQL
func
(
sfj
SelectFromJoin
)
SQL
()
string
SelectFromTable
type
SelectFromTable
struct
{
Table
ID
Alias
ID
// empty if not aliased
Hints
map
[
string
]
string
}
SelectFromTable is a SelectFrom that specifies a table to read from.
func (SelectFromTable) SQL
func
(
sft
SelectFromTable
)
SQL
()
string
SelectFromUnnest
SelectFromUnnest is a SelectFrom that yields a virtual table from an array. https://cloud.google.com/spanner/docs/query-syntax#unnest
func (SelectFromUnnest) SQL
func
(
sfu
SelectFromUnnest
)
SQL
()
string
SetColumnOptions
type
SetColumnOptions
struct
{
Options
ColumnOptions
}
func (SetColumnOptions) SQL
func
(
sco
SetColumnOptions
)
SQL
()
string
SetColumnType
func (SetColumnType) SQL
func
(
sct
SetColumnType
)
SQL
()
string
SetDatabaseOptions
type
SetDatabaseOptions
struct
{
Options
DatabaseOptions
}
func (SetDatabaseOptions) SQL
func
(
sdo
SetDatabaseOptions
)
SQL
()
string
SetDefault
type
SetDefault
struct
{
Default
Expr
}
func (SetDefault) SQL
func
(
sd
SetDefault
)
SQL
()
string
SetOnDelete
type
SetOnDelete
struct
{
Action
OnDelete
}
func (SetOnDelete) SQL
func
(
sod
SetOnDelete
)
SQL
()
string
StarExpr
type
StarExpr
int
func (StarExpr) SQL
StringLiteral
type
StringLiteral
string
StringLiteral represents a string literal. https://cloud.google.com/spanner/docs/lexical#string-and-bytes-literals
func (StringLiteral) SQL
func
(
sl
StringLiteral
)
SQL
()
string
TableAlteration
type
TableAlteration
interface
{
SQL
()
string
// contains filtered or unexported methods
}
TableAlteration is satisfied by AddColumn, DropColumn, AddConstraint, DropConstraint, SetOnDelete and AlterColumn, AddRowDeletionPolicy, ReplaceRowDeletionPolicy, DropRowDeletionPolicy.
TableConstraint
type
TableConstraint
struct
{
Name
ID
// may be empty
Constraint
Constraint
Position
Position
// position of the "CONSTRAINT" token, or Constraint.Pos()
}
TableConstraint represents a constraint on a table.
func (TableConstraint) Pos
func
(
tc
TableConstraint
)
Pos
()
Position
func (TableConstraint) SQL
func
(
tc
TableConstraint
)
SQL
()
string
TableSample
type
TableSample
struct
{
Method
TableSampleMethod
Size
Expr
SizeType
TableSampleSizeType
}
TableSampleMethod
type
TableSampleMethod
int
Bernoulli, Reservoir
const
(
Bernoulli
TableSampleMethod
=
iota
Reservoir
)
TableSampleSizeType
type
TableSampleSizeType
int
PercentTableSample, RowsTableSample
const
(
PercentTableSample
TableSampleSizeType
=
iota
RowsTableSample
)
TimestampLiteral
TimestampLiteral represents a timestamp literal. https://cloud.google.com/spanner/docs/lexical#timestamp_literals
func (TimestampLiteral) SQL
func
(
tl
TimestampLiteral
)
SQL
()
string
Type
type
Type
struct
{
Array
bool
Base
TypeBase
// Bool, Int64, Float64, Numeric, String, Bytes, Date, Timestamp
Len
int64
// if Base is String or Bytes; may be MaxLen
}
Type represents a column type.
func (Type) SQL
TypeBase
type
TypeBase
int
Bool, Int64, Float64, Numeric, String, Bytes, Date, Timestamp, JSON
func (TypeBase) SQL
TypedExpr
TypedExpr represents a typed expression in the form expr AS type_name
, e.g. '17' AS INT64
.
func (TypedExpr) SQL
Update
type
Update
struct
{
Table
ID
Items
[]
UpdateItem
Where
BoolExpr
}
Update represents an UPDATE statement. https://cloud.google.com/spanner/docs/dml-syntax#update-statement
func (*Update) SQL
func (*Update) String
UpdateItem
Values
type
Values
[][]
Expr
Values represents one or more lists of expressions passed to an INSERT
statement.
func (Values) SQL
func (Values) String
ValuesOrSelect
type
ValuesOrSelect
interface
{
SQL
()
string
// contains filtered or unexported methods
}
