refactor: 移除antlr4减小包体积&ai助手优化

server/internal/db/dbm/sqlparser/sqlstmt/common.go

@@ -1,187 +1,41 @@
 package sqlstmt
 
-type (
-	IExpr interface {
-		INode
-
-		isExpr()
-	}
-
-	Expr struct {
-		*Node
-	}
-
-	ExprLogical struct {
-		Expr
-
-		Operator string
-		Exprs    []IExpr
-	}
-
-	ExprPredicate struct {
-		Expr
-
-		Predicate IPredicate
-	}
-)
-
-func (*Expr) isExpr() {}
-
-type (
-	IPredicate interface {
-		INode
-
-		isPredicate()
-	}
-
-	Predicate struct {
-		*Node
-	}
-
-	PredicateBinaryComparison struct {
-		Predicate
-
-		Left               IPredicate
-		Right              IPredicate
-		ComparisonOperator string
-	}
-
-	PredicateIn struct {
-		Predicate
-
-		InPredicate IPredicate
-		Exprs       []IExpr
-		SelectStmt  ISelectStmt
-	}
-
-	PredicateExprAtom struct {
-		Predicate
-
-		ExprAtom IExprAtom
-	}
-
-	PredicateLike struct {
-		Predicate
-
-		InPredicate IPredicate
-		Exprs       []IExpr
-		SelectStmt  ISelectStmt
-	}
-)
-
-func (*Predicate) isPredicate() {}
-
-type (
-	IExprAtom interface {
-		INode
-
-		isExprAtom()
-	}
-
-	ExprAtom struct {
-		*Node
-	}
-
-	ExprAtomFunctionCall struct {
-		*Node
-	}
-
-	ExprAtomConstant struct {
-		ExprAtom
-
-		Constant *Constant
-	}
-
-	ExprAtomColumnName struct {
-		ExprAtom
-
-		ColumnName *ColumnName
-	}
-)
-
-func (*ExprAtom) isExprAtom() {}
-
-type (
-	ITableSource interface {
-		INode
-
-		isTableSource()
-	}
-
-	TableSource struct {
-		*Node
-	}
-
-	TableSources struct {
-		*Node
-
-		TableSources []ITableSource
-	}
-
-	TableSourceBase struct {
-		TableSource
-
-		TableSourceItem ITableSourceItem
-		JoinParts       []IJoinPart
-	}
-
-	ITableSourceItem interface {
-		INode
-	}
-
-	TableSourceItem struct {
-		*Node
-	}
-
-	AtomTableItem struct {
-		TableSourceItem
-
-		TableName *TableName // 表名
-		Alias     string     // 别名
-	}
-
-	// SubqueryTableItem 表示子查询表项，如 (SELECT * FROM table1) AS alias
-	SubqueryTableItem struct {
-		TableSourceItem
-
-		SubQuery ISelectStmt
-		Alias    string
-	}
-)
-
-func (*TableSource) isTableSource() {}
-
-type (
-	Constant struct {
-		*Node
-
-		Value string
-	}
-
-	FullId struct {
-		*Node
-
-		Uids []string
-	}
-)
-
-type ColumnName struct {
-	*Node
-
-	Owner             string
-	Identifier        *IdentifierValue
-	NestedObjectAttrs []string
+// TableRef 表示表引用
+type TableRef struct {
+	Schema string // 数据库/模式名
+	Name   string // 表名
+	Alias  string // 别名
 }
 
-type TableName struct {
-	*Node
-
-	Owner      string
-	Identifier *IdentifierValue
+// FullName 返回完整表名（含 schema）
+func (t TableRef) FullName() string {
+	if t.Schema != "" {
+		return t.Schema + "." + t.Name
+	}
+	return t.Name
 }
 
-type (
-	FuncCall interface {
-		INode
-	}
-)
+// Expr 表示表达式（WHERE、ON、HAVING 等）
+type Expr struct {
+	Text string // 原始表达式文本
+}
+
+// Limit LIMIT/OFFSET
+type Limit struct {
+	Count  int
+	Offset int
+	Text   string
+}
+
+// OrderByItem ORDER BY 项
+type OrderByItem struct {
+	Text string
+	Desc bool
+}
+
+// Assignment SET 赋值
+type Assignment struct {
+	Column string
+	Value  *Expr
+	Text   string
+}