dumpling: check table-list types before dumping (#53683)

dumpling/export/dump.go

@@ -1146,9 +1146,24 @@
 }
 
 func prepareTableListToDump(tctx *tcontext.Context, conf *Config, db *sql.Conn) error {
-	if conf.specifiedTables || conf.SQL != "" {
+	if conf.SQL != "" {
 		return nil
 	}
+
+	ifSeqExists, err := CheckIfSeqExists(db)
+	if err != nil {
+		return err
+	}
+	var listType listTableType
+	if ifSeqExists {
+		listType = listTableByShowFullTables
+	} else {
+		listType = getListTableTypeByConf(conf)
+	}
+
+	if conf.specifiedTables {
+		return updateSpecifiedTablesMeta(tctx, db, conf.Tables, listType)
+	}
 	databases, err := prepareDumpingDatabases(tctx, conf, db)
 	if err != nil {
 		return err
@@ -1162,17 +1177,6 @@
 		tableTypes = append(tableTypes, TableTypeSequence)
 	}
 
-	ifSeqExists, err := CheckIfSeqExists(db)
-	if err != nil {
-		return err
-	}
-	var listType listTableType
-	if ifSeqExists {
-		listType = listTableByShowFullTables
-	} else {
-		listType = getListTableTypeByConf(conf)
-	}
-
 	conf.Tables, err = ListAllDatabasesTables(tctx, db, databases, listType, tableTypes...)
 	if err != nil {
 		return err

dumpling/export/sql.go

@@ -246,6 +246,119 @@
 	_, _ = w.WriteString("SET collation_connection = @PREV_COLLATION_CONNECTION;\n")
 }
 
+// updateSpecifiedTablesMeta updates DatabaseTables with correct table type and avg row size.
+func updateSpecifiedTablesMeta(tctx *tcontext.Context, db *sql.Conn, dbTables DatabaseTables, listType listTableType) error {
+	var (
+		schema, table, tableTypeStr string
+		tableType                   TableType
+		avgRowLength                uint64
+		err                         error
+	)
+	switch listType {
+	case listTableByInfoSchema:
+		dbNames := make([]string, 0, len(dbTables))
+		for db := range dbTables {
+			dbNames = append(dbNames, fmt.Sprintf("'%s'", db))
+		}
+		query := fmt.Sprintf("SELECT TABLE_SCHEMA,TABLE_NAME,TABLE_TYPE,AVG_ROW_LENGTH FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA IN (%s)", strings.Join(dbNames, ","))
+		if err := simpleQueryWithArgs(tctx, db, func(rows *sql.Rows) error {
+			var (
+				sqlAvgRowLength sql.NullInt64
+				err2            error
+			)
+			if err2 = rows.Scan(&schema, &table, &tableTypeStr, &sqlAvgRowLength); err != nil {
+				return errors.Trace(err2)
+			}
+
+			tbls, ok := dbTables[schema]
+			if !ok {
+				return nil
+			}
+			for _, tbl := range tbls {
+				if tbl.Name == table {
+					tableType, err2 = ParseTableType(tableTypeStr)
+					if err2 != nil {
+						return errors.Trace(err2)
+					}
+					if sqlAvgRowLength.Valid {
+						avgRowLength = uint64(sqlAvgRowLength.Int64)
+					} else {
+						avgRowLength = 0
+					}
+					tbl.Type = tableType
+					tbl.AvgRowLength = avgRowLength
+				}
+			}
+			return nil
+		}, query); err != nil {
+			return errors.Annotatef(err, "sql: %s", query)
+		}
+		return nil
+	case listTableByShowFullTables:
+		for schema, tbls := range dbTables {
+			query := fmt.Sprintf("SHOW FULL TABLES FROM `%s`",
+				escapeString(schema))
+			if err := simpleQueryWithArgs(tctx, db, func(rows *sql.Rows) error {
+				var err2 error
+				if err2 = rows.Scan(&table, &tableTypeStr); err != nil {
+					return errors.Trace(err2)
+				}
+				for _, tbl := range tbls {
+					if tbl.Name == table {
+						tableType, err2 = ParseTableType(tableTypeStr)
+						if err2 != nil {
+							return errors.Trace(err2)
+						}
+						tbl.Type = tableType
+					}
+				}
+				return nil
+			}, query); err != nil {
+				return errors.Annotatef(err, "sql: %s", query)
+			}
+		}
+		return nil
+	default:
+		const queryTemplate = "SHOW TABLE STATUS FROM `%s`"
+		for schema, tbls := range dbTables {
+			query := fmt.Sprintf(queryTemplate, escapeString(schema))
+			rows, err := db.QueryContext(tctx, query)
+			if err != nil {
+				return errors.Annotatef(err, "sql: %s", query)
+			}
+			results, err := GetSpecifiedColumnValuesAndClose(rows, "NAME", "ENGINE", "AVG_ROW_LENGTH", "COMMENT")
+			if err != nil {
+				return errors.Annotatef(err, "sql: %s", query)
+			}
+			for _, oneRow := range results {
+				table, engine, avgRowLengthStr, comment := oneRow[0], oneRow[1], oneRow[2], oneRow[3]
+				for _, tbl := range tbls {
+					if tbl.Name == table {
+						if avgRowLengthStr != "" {
+							avgRowLength, err = strconv.ParseUint(avgRowLengthStr, 10, 64)
+							if err != nil {
+								return errors.Annotatef(err, "sql: %s", query)
+							}
+						} else {
+							avgRowLength = 0
+						}
+						tbl.AvgRowLength = avgRowLength
+						tableType = TableTypeBase
+						if engine == "" && (comment == "" || comment == TableTypeViewStr) {
+							tableType = TableTypeView
+						} else if engine == "" {
+							tctx.L().Warn("invalid table without engine found", zap.String("database", schema), zap.String("table", table))
+							continue
+						}
+						tbl.Type = tableType
+					}
+				}
+			}
+		}
+		return nil
+	}
+}
+
 // ListAllDatabasesTables lists all the databases and tables from the database
 // listTableByInfoSchema list tables by table information_schema in MySQL
 // listTableByShowTableStatus has better performance than listTableByInfoSchema

dumpling/tests/specified_table_view/run.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# Copyright 2024 PingCAP, Inc. Licensed under Apache-2.0.
+
+set -eu
+cur=$(cd `dirname $0`; pwd)
+
+DB_NAME="specified_table_view"
+TABLE_NAME="t"
+VIEW_NAME="v"
+
+run_sql "drop database if exists \`$DB_NAME\`;"
+run_sql "create database \`$DB_NAME\`;"
+run_sql "create table \`$DB_NAME\`.\`$TABLE_NAME\` (a int);"
+run_sql "create view \`$DB_NAME\`.\`$VIEW_NAME\` as select * from \`$DB_NAME\`.\`$TABLE_NAME\`;"
+
+set +e
+rm -rf "$DUMPLING_OUTPUT_DIR"
+run_dumpling --consistency=lock -T="$DB_NAME.$TABLE_NAME,$DB_NAME.$VIEW_NAME" -L ${DUMPLING_OUTPUT_DIR}/dumpling.log
+set -e
+
+file_should_exist "$DUMPLING_OUTPUT_DIR/$DB_NAME.$TABLE_NAME-schema.sql"
+file_should_exist "$DUMPLING_OUTPUT_DIR/$DB_NAME.$VIEW_NAME-schema-view.sql"
+
+set +e
+rm -rf "$DUMPLING_OUTPUT_DIR"
+run_dumpling --consistency=lock -T="$DB_NAME.$TABLE_NAME,$DB_NAME.$VIEW_NAME" -L ${DUMPLING_OUTPUT_DIR}/dumpling.log
+set -e
+
+file_should_exist "$DUMPLING_OUTPUT_DIR/$DB_NAME.$TABLE_NAME-schema.sql"
+file_should_exist "$DUMPLING_OUTPUT_DIR/$DB_NAME.$VIEW_NAME-schema-view.sql"