[release-19.0] sqlparser: use integers instead of literals for Length…

…/Precision (#15256) (#15269)

Signed-off-by: Dirkjan Bussink <[email protected]>
Co-authored-by: vitess-bot[bot] <108069721+vitess-bot[bot]@users.noreply.github.com>

go/ptr/ptr.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package ptr
+
+// Of returns a pointer to the given value
+func Of[T any](x T) *T {
+	return &x
+}
+
+// Unwrap dereferences the given pointer if it's not nil.
+// Otherwise, it returns default_
+func Unwrap[T any](x *T, default_ T) T {
+	if x != nil {
+		return *x
+	}
+	return default_
+}

go/test/endtoend/vtgate/queries/aggregation/aggregation_test.go

@@ -557,6 +557,27 @@ func TestComplexAggregation(t *testing.T) {
 	})
 }
 
+func TestJoinAggregation(t *testing.T) {
+	// This is new functionality in Vitess 20
+	utils.SkipIfBinaryIsBelowVersion(t, 20, "vtgate")
+
+	mcmp, closer := start(t)
+	defer closer()
+
+	mcmp.Exec("insert into t1(t1_id, `name`, `value`, shardkey) values(1,'a1','foo',100), (2,'b1','foo',200), (3,'c1','foo',300), (4,'a1','foo',100), (5,'d1','toto',200), (6,'c1','tata',893), (7,'a1','titi',2380), (8,'b1','tete',12833), (9,'e1','yoyo',783493)")
+
+	mcmp.Exec(`insert into bet_logs(id, merchant_game_id, bet_amount, game_id) values
+		(1, 1, 22.5, 40), (2, 1, 15.3, 40),
+		(3, 2, 22.5, 40), (4, 2, 15.3, 40),
+		(5, 3, 22.5, 40), (6, 3, 15.3, 40),
+		(7, 3, 22.5, 40), (8, 4, 15.3, 40)
+`)
+
+	mcmp.Exec("set @@sql_mode = ' '")
+	mcmp.Exec(`SELECT t1.name, SUM(b.bet_amount) AS bet_amount FROM bet_logs as b LEFT JOIN t1 ON b.merchant_game_id = t1.t1_id GROUP BY b.merchant_game_id`)
+	mcmp.Exec(`SELECT t1.name, CAST(SUM(b.bet_amount) AS DECIMAL(20,6)) AS bet_amount FROM bet_logs as b LEFT JOIN t1 ON b.merchant_game_id = t1.t1_id GROUP BY b.merchant_game_id`)
+}
+
 // TestGroupConcatAggregation tests the group_concat function with vitess doing the aggregation.
 func TestGroupConcatAggregation(t *testing.T) {
 	mcmp, closer := start(t)

go/test/endtoend/vtgate/queries/aggregation/schema.sql

@@ -96,4 +96,12 @@ CREATE TABLE dept (
     loc VARCHAR(13),
     PRIMARY KEY (deptno)
 ) Engine = InnoDB
-  COLLATE = utf8mb4_general_ci;
+  COLLATE = utf8mb4_general_ci;
+
+CREATE TABLE bet_logs (
+    id bigint unsigned NOT NULL,
+    merchant_game_id bigint unsigned NOT NULL,
+    bet_amount DECIMAL(20, 8),
+    game_id bigint,
+    PRIMARY KEY (id)
+) ENGINE InnoDB;

go/test/endtoend/vtgate/queries/aggregation/vschema.json

@@ -147,6 +147,14 @@
           "name": "hash"
         }
       ]
+    },
+    "bet_logs": {
+      "column_vindexes": [
+        {
+          "column": "id",
+          "name": "hash"
+        }
+      ]
     }
   }
 }

go/vt/schemadiff/table.go

@@ -25,6 +25,7 @@ import (
 
 	golcs "github.com/yudai/golcs"
 
+	"vitess.io/vitess/go/ptr"
 	"vitess.io/vitess/go/vt/sqlparser"
 )
 
@@ -530,10 +531,7 @@ func (c *CreateTableEntity) normalizeColumnOptions() {
 		// "show create table" reports it as a tinyint(1).
 		if col.Type.Type == "boolean" {
 			col.Type.Type = "tinyint"
-			col.Type.Length = &sqlparser.Literal{
-				Type: sqlparser.IntVal,
-				Val:  "1",
-			}
+			col.Type.Length = ptr.Of(1)
 
 			if col.Type.Options.Default != nil {
 				val, ok := col.Type.Options.Default.(sqlparser.BoolVal)
@@ -562,16 +560,14 @@ func (c *CreateTableEntity) normalizeColumnOptions() {
 				col.Type.Type = "double"
 			}
 
-			if col.Type.Length != nil && col.Type.Scale == nil && col.Type.Length.Type == sqlparser.IntVal {
-				if l, err := strconv.ParseInt(col.Type.Length.Val, 10, 64); err == nil {
-					// See https://dev.mysql.com/doc/refman/8.0/en/floating-point-types.html, but the docs are
-					// subtly wrong. We use a float for a precision of 24, not a double as the documentation
-					// mentioned. Validated against the actual behavior of MySQL.
-					if l <= 24 {
-						col.Type.Type = "float"
-					} else {
-						col.Type.Type = "double"
-					}
+			if col.Type.Length != nil && col.Type.Scale == nil {
+				// See https://dev.mysql.com/doc/refman/8.0/en/floating-point-types.html, but the docs are
+				// subtly wrong. We use a float for a precision of 24, not a double as the documentation
+				// mentioned. Validated against the actual behavior of MySQL.
+				if *col.Type.Length <= 24 {
+					col.Type.Type = "float"
+				} else {
+					col.Type.Type = "double"
 				}
 				col.Type.Length = nil
 			}
@@ -627,7 +623,7 @@ func (c *CreateTableEntity) normalizeIndexOptions() {
 }
 
 func isBool(colType *sqlparser.ColumnType) bool {
-	return colType.Type == sqlparser.KeywordString(sqlparser.TINYINT) && colType.Length != nil && sqlparser.CanonicalString(colType.Length) == "1"
+	return colType.Type == sqlparser.KeywordString(sqlparser.TINYINT) && colType.Length != nil && *colType.Length == 1
 }
 
 func (c *CreateTableEntity) normalizePartitionOptions() {

go/vt/sqlparser/ast.go

@@ -1807,10 +1807,10 @@ type ColumnType struct {
 	Options *ColumnTypeOptions
 
 	// Numeric field options
-	Length   *Literal
+	Length   *int
 	Unsigned bool
 	Zerofill bool
-	Scale    *Literal
+	Scale    *int
 
 	// Text field options
 	Charset ColumnCharset
@@ -3419,8 +3419,8 @@ func (ListArg) iColTuple()   {}
 // ConvertType represents the type in call to CONVERT(expr, type)
 type ConvertType struct {
 	Type    string
-	Length  *Literal
-	Scale   *Literal
+	Length  *int
+	Scale   *int
 	Charset ColumnCharset
 }
 

go/vt/sqlparser/ast_format.go

@@ -696,10 +696,10 @@ func (ct *ColumnType) Format(buf *TrackedBuffer) {
 	buf.astPrintf(ct, "%#s", ct.Type)
 
 	if ct.Length != nil && ct.Scale != nil {
-		buf.astPrintf(ct, "(%v,%v)", ct.Length, ct.Scale)
+		buf.astPrintf(ct, "(%d,%d)", *ct.Length, *ct.Scale)
 
 	} else if ct.Length != nil {
-		buf.astPrintf(ct, "(%v)", ct.Length)
+		buf.astPrintf(ct, "(%d)", *ct.Length)
 	}
 
 	if ct.EnumValues != nil {
@@ -824,7 +824,7 @@ func (idx *IndexDefinition) Format(buf *TrackedBuffer) {
 		} else {
 			buf.astPrintf(idx, "%v", col.Column)
 			if col.Length != nil {
-				buf.astPrintf(idx, "(%v)", col.Length)
+				buf.astPrintf(idx, "(%d)", *col.Length)
 			}
 		}
 		if col.Direction == DescOrder {
@@ -1852,9 +1852,9 @@ func (node *ConvertUsingExpr) Format(buf *TrackedBuffer) {
 func (node *ConvertType) Format(buf *TrackedBuffer) {
 	buf.astPrintf(node, "%#s", node.Type)
 	if node.Length != nil {
-		buf.astPrintf(node, "(%v", node.Length)
+		buf.astPrintf(node, "(%d", *node.Length)
 		if node.Scale != nil {
-			buf.astPrintf(node, ", %v", node.Scale)
+			buf.astPrintf(node, ", %d", *node.Scale)
 		}
 		buf.astPrintf(node, ")")
 	}