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database_observability: use TiDB parser for parsing query samples #2807
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92 changes: 92 additions & 0 deletions
92
internal/component/database_observability/mysql/collector/parser/parser_tidb.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package parser | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "golang.org/x/exp/maps" | ||
|
|
||
| "github.com/go-kit/log" | ||
| "github.com/pingcap/tidb/pkg/parser" | ||
| "github.com/pingcap/tidb/pkg/parser/ast" | ||
| _ "github.com/pingcap/tidb/pkg/parser/test_driver" | ||
| ) | ||
|
|
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| type TiDBSqlParser struct{} | ||
|
|
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| func NewTiDBSqlParser() *TiDBSqlParser { | ||
| return &TiDBSqlParser{} | ||
| } | ||
|
|
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| func (p *TiDBSqlParser) ParseSql(sql string) (any, error) { | ||
| stmtNodes, _, err := parser.New().ParseSQL(sql) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(stmtNodes) == 0 { | ||
| return nil, fmt.Errorf("no statements parsed") | ||
| } | ||
|
|
||
| return &stmtNodes[0], nil | ||
| } | ||
|
|
||
| func (p *TiDBSqlParser) RedactSQL(sql string) (string, error) { | ||
| res := parser.Normalize(sql, "ON") | ||
| if res == "" { | ||
| return "", fmt.Errorf("error normalizing SQL") | ||
| } | ||
| return res, nil | ||
| } | ||
|
|
||
| func (p *TiDBSqlParser) StmtType(stmt any) string { | ||
| s := stmt.(*ast.StmtNode) | ||
| switch ast.GetStmtLabel(*s) { | ||
| case "Select": | ||
| return "select" | ||
| case "Insert": | ||
| return "insert" | ||
| case "Update": | ||
| return "update" | ||
| case "Delete": | ||
| return "delete" | ||
| default: | ||
| return "" | ||
| } | ||
| } | ||
|
|
||
| func (p *TiDBSqlParser) ExtractTableNames(_ log.Logger, _ string, stmt any) []string { | ||
| v := &tableNameVisitor{ | ||
| tables: map[string]struct{}{}, | ||
| } | ||
| (*stmt.(*ast.StmtNode)).Accept(v) | ||
| return maps.Keys(v.tables) | ||
| } | ||
|
|
||
| func (p *TiDBSqlParser) ParseTableName(t any) string { | ||
| return parseTableName(t.(*ast.TableName)) | ||
| } | ||
|
|
||
| type tableNameVisitor struct { | ||
| tables map[string]struct{} | ||
| } | ||
|
|
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| func (v *tableNameVisitor) Enter(n ast.Node) (ast.Node, bool) { | ||
| if tableRef, ok := n.(*ast.TableName); ok { | ||
| tableName := parseTableName(tableRef) | ||
| v.tables[tableName] = struct{}{} | ||
| } | ||
| return n, false | ||
| } | ||
|
|
||
| func (v *tableNameVisitor) Leave(n ast.Node) (ast.Node, bool) { | ||
| return n, true | ||
| } | ||
|
|
||
| func parseTableName(t *ast.TableName) string { | ||
| schema := t.Schema.String() | ||
| tableName := t.Name.String() | ||
| if schema != "" { | ||
| return schema + "." + tableName | ||
| } | ||
| return tableName | ||
| } |
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Moving this entry as the change "better handling of truncated queries" was not included in 1.7.1.