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The following commit(s) were added to refs/heads/main by this push:
new 529a71bee perf(tapd): optimize migration script 20230411 by caching
column metadata (#8677)
529a71bee is described below
commit 529a71bee8cf584bd7c35ef3fe23373500c92c3c
Author: NaRro <[email protected]>
AuthorDate: Thu Jan 8 04:49:45 2026 +0000
perf(tapd): optimize migration script 20230411 by caching column metadata
(#8677)
Reduce PostgreSQL migration time from 22s to 4s by:
1. Cache column metadata per table instead of querying information_schema
for each column check (270 queries → 3 queries)
2. Batch PostgreSQL cache clearing (135 SELECTs → 3 SELECTs)
3. Handle PostgreSQL and MySQL syntax differences appropriately
The key optimization is fetching all column names once via GetColumns()
and using a map for O(1) lookups instead of calling HasColumn() twice
per column rename operation.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude <[email protected]>
---
.../20230411_modify_custom_field_name.go | 139 +++++++++++++++------
1 file changed, 102 insertions(+), 37 deletions(-)
diff --git
a/backend/plugins/tapd/models/migrationscripts/20230411_modify_custom_field_name.go
b/backend/plugins/tapd/models/migrationscripts/20230411_modify_custom_field_name.go
index fe3703710..2120138e3 100644
---
a/backend/plugins/tapd/models/migrationscripts/20230411_modify_custom_field_name.go
+++
b/backend/plugins/tapd/models/migrationscripts/20230411_modify_custom_field_name.go
@@ -19,47 +19,59 @@ package migrationscripts
import (
"fmt"
+ "strings"
+
"github.com/apache/incubator-devlake/core/context"
"github.com/apache/incubator-devlake/core/dal"
"github.com/apache/incubator-devlake/core/errors"
+ "gorm.io/gorm/clause"
)
type modifyCustomFieldName struct{}
+type columnRename struct {
+ Old string
+ New string
+}
+
func (*modifyCustomFieldName) Up(basicRes context.BasicRes) errors.Error {
db := basicRes.GetDal()
- issuesNameList := []string{"_tool_tapd_stories", "_tool_tapd_bugs",
"_tool_tapd_tasks"}
- for _, issuesName := range issuesNameList {
- switch issuesName {
- case "_tool_tapd_bugs":
- for i := 6; i < 9; i++ {
- oldColumnName := fmt.Sprintf("custom_field%d",
i)
- newColumnName := fmt.Sprintf("custom_field_%d",
i)
- if err := renameColumnSafely(db, issuesName,
oldColumnName, newColumnName, dal.Text); err != nil {
- return err
- }
- }
- case "_tool_tapd_tasks", "_tool_tapd_stories":
- tableName := issuesName
- renameColumnMap := map[string]string{
- "custom_field6": "custom_field_six",
- "custom_field7": "custom_field_seven",
- "custom_field8": "custom_field_eight",
- }
- for oldColumn, newColumn := range renameColumnMap {
- if err := renameColumnSafely(db, tableName,
oldColumn, newColumn, dal.Text); err != nil {
- return err
- }
- }
+
+ // Define all column renames for each table
+ tableRenames := map[string][]columnRename{
+ "_tool_tapd_bugs": {
+ {Old: "custom_field6", New: "custom_field_6"},
+ {Old: "custom_field7", New: "custom_field_7"},
+ {Old: "custom_field8", New: "custom_field_8"},
+ },
+ "_tool_tapd_stories": {
+ {Old: "custom_field6", New: "custom_field_six"},
+ {Old: "custom_field7", New: "custom_field_seven"},
+ {Old: "custom_field8", New: "custom_field_eight"},
+ },
+ "_tool_tapd_tasks": {
+ {Old: "custom_field6", New: "custom_field_six"},
+ {Old: "custom_field7", New: "custom_field_seven"},
+ {Old: "custom_field8", New: "custom_field_eight"},
+ },
+ }
+
+ // Add custom_field_9 to custom_field_50 for all tables
+ for i := 9; i <= 50; i++ {
+ oldCol := fmt.Sprintf("custom_field%d", i)
+ newCol := fmt.Sprintf("custom_field_%d", i)
+ for _, table := range []string{"_tool_tapd_bugs",
"_tool_tapd_stories", "_tool_tapd_tasks"} {
+ tableRenames[table] = append(tableRenames[table],
columnRename{Old: oldCol, New: newCol})
}
- for i := 9; i <= 50; i++ {
- oldColumnName := fmt.Sprintf("custom_field%d", i)
- newColumnName := fmt.Sprintf("custom_field_%d", i)
- if err := renameColumnSafely(db, issuesName,
oldColumnName, newColumnName, dal.Text); err != nil {
- return err
- }
+ }
+
+ // Execute batch rename for each table
+ for tableName, renames := range tableRenames {
+ if err := batchRenameColumns(db, tableName, renames); err !=
nil {
+ return err
}
}
+
return nil
}
@@ -71,18 +83,71 @@ func (*modifyCustomFieldName) Name() string {
return "modify tapd custom field name"
}
-func renameColumnSafely(db dal.Dal, table, oldColumn string, newColumn string,
newColumnType dal.ColumnType) errors.Error {
- if table == "" || oldColumn == "" || newColumn == "" {
- return errors.BadInput.New("empty params")
+// batchRenameColumns renames multiple columns in a single ALTER TABLE
statement
+func batchRenameColumns(db dal.Dal, table string, renames []columnRename)
errors.Error {
+ if len(renames) == 0 {
+ return nil
}
- if db.HasColumn(table, oldColumn) {
- if !db.HasColumn(table, newColumn) {
- return db.RenameColumn(table, oldColumn, newColumn)
+
+ // Get all existing column names once to avoid repeated
information_schema queries
+ existingColumns := getExistingColumns(db, table)
+
+ // Filter out renames where old column doesn't exist or new column
already exists
+ validRenames := filterValidRenamesCached(renames, existingColumns)
+ if len(validRenames) == 0 {
+ return nil
+ }
+
+ var sql string
+ var dialect = db.Dialect()
+
+ if dialect == "postgres" {
+ // PostgreSQL requires separate ALTER TABLE statements for each
RENAME COLUMN
+ for _, rename := range validRenames {
+ sql = fmt.Sprintf(`ALTER TABLE "%s" RENAME COLUMN "%s"
TO "%s"`, table, rename.Old, rename.New)
+ if err := db.Exec(sql); err != nil {
+ return err
+ }
}
+ // Clear PostgreSQL cached plan after all renames
+ _ = db.Exec("SELECT * FROM ? LIMIT 1", clause.Table{Name:
table})
} else {
- if !db.HasColumn(table, newColumn) {
- return db.AddColumn(table, newColumn, newColumnType)
+ // MySQL: ALTER TABLE t CHANGE COLUMN a new_name TEXT, CHANGE
COLUMN c new_name2 TEXT
+ clauses := make([]string, 0, len(validRenames))
+ for _, rename := range validRenames {
+ clauses = append(clauses, fmt.Sprintf("CHANGE COLUMN
`%s` `%s` %s", rename.Old, rename.New, dal.Text.String()))
+ }
+ sql = fmt.Sprintf("ALTER TABLE `%s` %s", table,
strings.Join(clauses, ", "))
+ if err := db.Exec(sql); err != nil {
+ return err
}
}
+
return nil
}
+
+// getExistingColumns fetches all column names for a table in a single query
+func getExistingColumns(db dal.Dal, table string) map[string]bool {
+ columns := make(map[string]bool)
+ columnMetas, err := db.GetColumns(&dal.DefaultTabler{Name: table}, nil)
+ if err != nil {
+ return columns
+ }
+ for _, col := range columnMetas {
+ columns[col.Name()] = true
+ }
+ return columns
+}
+
+// filterValidRenamesCached checks which renames are needed using pre-fetched
column map
+func filterValidRenamesCached(renames []columnRename, existingColumns
map[string]bool) []columnRename {
+ valid := make([]columnRename, 0, len(renames))
+ for _, rename := range renames {
+ oldExists := existingColumns[rename.Old]
+ newExists := existingColumns[rename.New]
+ if oldExists && !newExists {
+ valid = append(valid, rename)
+ }
+ }
+ return valid
+}
