support trigger parser for only and just only can retrieve table name…

.gitignore

@@ -1 +1,3 @@
 y.output
+.idea
+

.travis.yml

@@ -11,6 +11,8 @@ go:
 before_install:
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
+  - go get github.com/xwb1989/sqlparser 
+  - go get github.com/zssky/log
   - go install golang.org/x/tools/cmd/goyacc
 
 script:

ast.go

@@ -659,6 +659,23 @@ type DDL struct {
 	PartitionSpec *PartitionSpec
 	VindexSpec    *VindexSpec
 	VindexCols    []ColIdent
+	Trigger       *Trigger
+	Definer       *Definer
+}
+
+type Definer struct {
+	User string
+	Host string
+}
+
+type Trigger struct {
+	Name      string    // trigger name
+	IsBefore  bool      // is before or after
+	Event     string    // update, insert, delete
+	Table     TableName // trigger table
+	Body      []byte    // trigger body
+	IsPrecede bool      // is precede or follows
+	Related   string    // other trigger name
 }
 
 // DDL strings.
@@ -674,6 +691,9 @@ const (
 
 	// Vindex DDL param to specify the owner of a vindex
 	VindexOwnerStr = "owner"
+
+	// CREATE TRIGGER
+	CreateTriggerStr = "create trigger"
 )
 
 // Format formats the node.