[release-20.0] VDiff: Copy non in_keyrange workflow filters to target…

… tablet query (#16307) (#16315)

Signed-off-by: Matt Lord <mattalord@gmail.com>
Co-authored-by: vitess-bot[bot] <108069721+vitess-bot[bot]@users.noreply.github.com>

go/vt/vttablet/tabletmanager/vdiff/table_plan.go

@@ -174,8 +174,14 @@ func (td *tableDiffer) buildTablePlan(dbClient binlogplayer.DBClient, dbName str
 		return nil, err
 	}
 
-	// Remove in_keyrange. It's not understood by mysql.
-	sourceSelect.Where = sel.Where // removeKeyrange(sel.Where)
+	// Copy all workflow filters for the source query.
+	sourceSelect.Where = sel.Where
+
+	// Copy all non-in_keyrange workflow filters to the target query.
+	// This is important for things like multi-tenant migrations where
+	// an additional tenant_id filter is applied in the workflow.
+	targetSelect.Where = copyNonKeyRangeExpressions(sel.Where)
+
 	// The source should also perform the group by.
 	sourceSelect.GroupBy = sel.GroupBy
 	sourceSelect.OrderBy = tp.orderBy

go/vt/vttablet/tabletmanager/vdiff/utils.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"strings"
 
+	"vitess.io/vitess/go/vt/sqlparser"
 	"vitess.io/vitess/go/vt/vtgate/evalengine"
 
 	"vitess.io/vitess/go/vt/binlog/binlogplayer"
@@ -89,3 +90,23 @@ func stringListContains(lst []string, item string) bool {
 	}
 	return contains
 }
+
+// copyNonKeyRangeExpressions copies all expressions from the input WHERE clause
+// to the output WHERE clause except for any in_keyrange() expressions.
+func copyNonKeyRangeExpressions(where *sqlparser.Where) *sqlparser.Where {
+	if where == nil {
+		return nil
+	}
+	exprs := sqlparser.SplitAndExpression(nil, where.Expr)
+	newWhere := &sqlparser.Where{}
+	for _, expr := range exprs {
+		switch expr := expr.(type) {
+		case *sqlparser.FuncExpr:
+			if expr.Name.EqualString("in_keyrange") {
+				continue
+			}
+		}
+		newWhere.Expr = sqlparser.AndExpressions(newWhere.Expr, expr)
+	}
+	return newWhere
+}

go/vt/vttablet/tabletmanager/vdiff/workflow_differ_test.go

@@ -364,7 +364,6 @@ func TestBuildPlanSuccess(t *testing.T) {
 		},
 	}, {
 		// in_keyrange on RHS of AND.
-		// This is currently not a valid construct, but will be supported in the future.
 		input: &binlogdatapb.Rule{
 			Match:  "t1",
 			Filter: "select * from t1 where c2 = 2 and in_keyrange('-80')",
@@ -374,7 +373,7 @@ func TestBuildPlanSuccess(t *testing.T) {
 			dbName:      vdiffDBName,
 			table:       testSchema.TableDefinitions[tableDefMap["t1"]],
 			sourceQuery: "select c1, c2 from t1 where c2 = 2 and in_keyrange('-80') order by c1 asc",
-			targetQuery: "select c1, c2 from t1 order by c1 asc",
+			targetQuery: "select c1, c2 from t1 where c2 = 2 order by c1 asc",
 			compareCols: []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}, {1, collations.MySQL8().LookupByName(sqltypes.NULL.String()), false, "c2"}},
 			comparePKs:  []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}},
 			pkCols:      []int{0},
@@ -386,7 +385,6 @@ func TestBuildPlanSuccess(t *testing.T) {
 		},
 	}, {
 		// in_keyrange on LHS of AND.
-		// This is currently not a valid construct, but will be supported in the future.
 		input: &binlogdatapb.Rule{
 			Match:  "t1",
 			Filter: "select * from t1 where in_keyrange('-80') and c2 = 2",
@@ -396,7 +394,7 @@ func TestBuildPlanSuccess(t *testing.T) {
 			dbName:      vdiffDBName,
 			table:       testSchema.TableDefinitions[tableDefMap["t1"]],
 			sourceQuery: "select c1, c2 from t1 where in_keyrange('-80') and c2 = 2 order by c1 asc",
-			targetQuery: "select c1, c2 from t1 order by c1 asc",
+			targetQuery: "select c1, c2 from t1 where c2 = 2 order by c1 asc",
 			compareCols: []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}, {1, collations.MySQL8().LookupByName(sqltypes.NULL.String()), false, "c2"}},
 			comparePKs:  []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}},
 			pkCols:      []int{0},
@@ -408,7 +406,6 @@ func TestBuildPlanSuccess(t *testing.T) {
 		},
 	}, {
 		// in_keyrange on cascaded AND expression.
-		// This is currently not a valid construct, but will be supported in the future.
 		input: &binlogdatapb.Rule{
 			Match:  "t1",
 			Filter: "select * from t1 where c2 = 2 and c1 = 1 and in_keyrange('-80')",
@@ -418,7 +415,7 @@ func TestBuildPlanSuccess(t *testing.T) {
 			dbName:      vdiffDBName,
 			table:       testSchema.TableDefinitions[tableDefMap["t1"]],
 			sourceQuery: "select c1, c2 from t1 where c2 = 2 and c1 = 1 and in_keyrange('-80') order by c1 asc",
-			targetQuery: "select c1, c2 from t1 order by c1 asc",
+			targetQuery: "select c1, c2 from t1 where c2 = 2 and c1 = 1 order by c1 asc",
 			compareCols: []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}, {1, collations.MySQL8().LookupByName(sqltypes.NULL.String()), false, "c2"}},
 			comparePKs:  []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}},
 			pkCols:      []int{0},
@@ -430,7 +427,6 @@ func TestBuildPlanSuccess(t *testing.T) {
 		},
 	}, {
 		// in_keyrange parenthesized.
-		// This is currently not a valid construct, but will be supported in the future.
 		input: &binlogdatapb.Rule{
 			Match:  "t1",
 			Filter: "select * from t1 where (c2 = 2 and in_keyrange('-80'))",
@@ -440,7 +436,7 @@ func TestBuildPlanSuccess(t *testing.T) {
 			dbName:      vdiffDBName,
 			table:       testSchema.TableDefinitions[tableDefMap["t1"]],
 			sourceQuery: "select c1, c2 from t1 where c2 = 2 and in_keyrange('-80') order by c1 asc",
-			targetQuery: "select c1, c2 from t1 order by c1 asc",
+			targetQuery: "select c1, c2 from t1 where c2 = 2 order by c1 asc",
 			compareCols: []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}, {1, collations.MySQL8().LookupByName(sqltypes.NULL.String()), false, "c2"}},
 			comparePKs:  []compareColInfo{{0, collations.MySQL8().LookupByName(sqltypes.NULL.String()), true, "c1"}},
 			pkCols:      []int{0},