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parser: support drop placement policy #1295

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merged 3 commits into from
Aug 5, 2021
Merged

parser: support drop placement policy #1295

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6e592f2
add drop column with index flag
AilinKid Jul 24, 2021
2bc75a1
support drop placement policy
AilinKid Aug 5, 2021
1efcd47
fmt
AilinKid Aug 5, 2021
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28 changes: 28 additions & 0 deletions ast/ddl.go
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ var (
_ DDLNode = &DropIndexStmt{}
_ DDLNode = &DropTableStmt{}
_ DDLNode = &DropSequenceStmt{}
_ DDLNode = &DropPlacementPolicyStmt{}
_ DDLNode = &RenameTableStmt{}
_ DDLNode = &TruncateTableStmt{}
_ DDLNode = &RepairTableStmt{}
Expand Down Expand Up @@ -1163,6 +1164,33 @@ func (n *DropTableStmt) Accept(v Visitor) (Node, bool) {
return v.Leave(n)
}

// DropPlacementPolicyStmt is a statement to drop a Policy.
type DropPlacementPolicyStmt struct {
ddlNode

IfExists bool
PolicyName model.CIStr
}

// Restore implements Restore interface.
func (n *DropPlacementPolicyStmt) Restore(ctx *format.RestoreCtx) error {
ctx.WriteKeyWord("DROP PLACEMENT POLICY ")
if n.IfExists {
ctx.WriteKeyWord("IF EXISTS ")
}
ctx.WriteName(n.PolicyName.O)
return nil
}

func (n *DropPlacementPolicyStmt) Accept(v Visitor) (Node, bool) {
newNode, skipChildren := v.Enter(n)
if skipChildren {
return v.Leave(newNode)
}
n = newNode.(*DropPlacementPolicyStmt)
return v.Leave(n)
}

// DropSequenceStmt is a statement to drop a Sequence.
type DropSequenceStmt struct {
ddlNode
Expand Down
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