Fix wrongly string format in UnaryExpr (#123)

Author: git-hulk

parser/ast.go

@@ -6645,7 +6645,7 @@ func (n *UnaryExpr) End() Pos {
 }
 
 func (n *UnaryExpr) String() string {
-	return "-" + n.Expr.String()
+	return string(n.Kind) + " " + n.Expr.String()
 }
 
 func (n *UnaryExpr) Accept(visitor ASTVisitor) error {

parser/parser_column.go

@@ -299,7 +299,7 @@ func (p *Parser) parseColumnExtractExpr(pos Pos) (*ExtractExpr, error) {
 }
 
 func (p *Parser) parseUnaryExpr(pos Pos) (Expr, error) {
-	kind := p.last()
+	op := p.last()
 	switch {
 	case p.matchTokenKind(TokenKindPlus),
 		p.matchTokenKind(TokenKindMinus),
@@ -316,7 +316,7 @@ func (p *Parser) parseUnaryExpr(pos Pos) (Expr, error) {
 
 	return &UnaryExpr{
 		UnaryPos: pos,
-		Kind:     kind.Kind,
+		Kind:     TokenKind(op.ToString()),
 		Expr:     expr,
 	}, nil
 

parser/testdata/ddl/create_mv_with_not_op.sql

@@ -0,0 +1,19 @@
+CREATE MATERIALIZED VIEW infra_bm.view_name
+    ON CLUSTER 'default_cluster' TO infra_bm.table_name
+(
+  `f1` DateTime64(3),
+  `f2` String,
+  `f3` String,
+  `f4` String,
+  `f5` String,
+  `f6` Int64
+) AS
+SELECT f1,
+       f2,
+       visitParamExtractString(properties, 'f3') AS f3,
+       visitParamExtractString(properties, 'f4') AS f4,
+       visitParamExtractString(properties, 'f5') AS f5,
+       visitParamExtractInt(properties, 'f6') AS f6
+FROM infra_bm.table_name1
+WHERE infra_bm.table_name1.event = 'test-event' AND
+    NOT isZeroOrNull(f2) AND f6-2 > 0

parser/testdata/ddl/format/create_mv_with_not_op.sql

@@ -0,0 +1,23 @@
+-- Origin SQL:
+CREATE MATERIALIZED VIEW infra_bm.view_name
+    ON CLUSTER 'default_cluster' TO infra_bm.table_name
+(
+  `f1` DateTime64(3),
+  `f2` String,
+  `f3` String,
+  `f4` String,
+  `f5` String,
+  `f6` Int64
+) AS
+SELECT f1,
+       f2,
+       visitParamExtractString(properties, 'f3') AS f3,
+       visitParamExtractString(properties, 'f4') AS f4,
+       visitParamExtractString(properties, 'f5') AS f5,
+       visitParamExtractInt(properties, 'f6') AS f6
+FROM infra_bm.table_name1
+WHERE infra_bm.table_name1.event = 'test-event' AND
+    NOT isZeroOrNull(f2) AND f6-2 > 0
+
+-- Format SQL:
+CREATE MATERIALIZED VIEW infra_bm.view_name ON CLUSTER 'default_cluster' TO infra_bm.table_name (`f1` DateTime64(3), `f2` String, `f3` String, `f4` String, `f5` String, `f6` Int64) AS SELECT f1, f2, visitParamExtractString(properties, 'f3') AS f3, visitParamExtractString(properties, 'f4') AS f4, visitParamExtractString(properties, 'f5') AS f5, visitParamExtractInt(properties, 'f6') AS f6 FROM infra_bm.table_name1 WHERE infra_bm.table_name1.event = 'test-event' AND NOT isZeroOrNull(f2) AND f6 - 2 > 0;