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Add Oracle backend support #45
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eb469f7
add oracle backend support & explanations
stevefan1999-personal 2e46f80
do not use encrypted password
stevefan1999-personal c474809
use a template instead to generate the procedure statement
stevefan1999-personal 180d6a2
use a more generic form of SQL for listSQL
stevefan1999-personal e15d5c9
add translate limit suffix hack
stevefan1999-personal 1be56c9
support insert into values(...) returing (...) into (...)
stevefan1999-personal 9b9ad43
add the missing limit translator
stevefan1999-personal 9948e71
fix type "mismatch" for deleted field, boolean vs number (damn you or…
stevefan1999-personal 1cba66b
oracle does not use question mark for prepared statement too
stevefan1999-personal fd38adf
number in oracle db is floating point instead of integer
stevefan1999-personal a649b3a
unwrap the error from xerror instead to get true ORA Error
stevefan1999-personal 6b3e0fa
add xerror
stevefan1999-personal bf38a77
serialize the query as it's dangerous and makes context messy
stevefan1999-personal c00f486
progressively replace custom formatted log message to use WithField
stevefan1999-personal 0838cf0
set back on using by default on null to prevent insertion error with …
stevefan1999-personal bdb0f38
Merge branch 'master' into patch-oracle
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package oracle | ||
|
|
||
| import ( | ||
| "context" | ||
| "database/sql" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/godror/godror" | ||
|
|
||
| "github.com/rancher/kine/pkg/drivers/generic" | ||
| "github.com/rancher/kine/pkg/logstructured" | ||
| "github.com/rancher/kine/pkg/logstructured/sqllog" | ||
| "github.com/rancher/kine/pkg/server" | ||
| ) | ||
|
|
||
| const ( | ||
| defaultHostDSN = "system@localhost" | ||
| ) | ||
|
|
||
| var ( | ||
| schema = []string{` | ||
| CREATE TABLE kine ( | ||
| id NUMBER GENERATED ALWAYS as IDENTITY, | ||
| name VARCHAR(630), | ||
| created INTEGER, | ||
| deleted INTEGER, | ||
| create_revision INTEGER, | ||
| prev_revision INTEGER, | ||
| lease INTEGER, | ||
| value BLOB, | ||
| old_value BLOB, | ||
| CONSTRAINT kine_pk PRIMARY KEY (id) | ||
| )`, | ||
| `CREATE INDEX kine_name_index ON kine (name)`, | ||
| `CREATE INDEX kine_name_id_index ON kine (name,id)`, | ||
| `CREATE UNIQUE INDEX kine_name_prev_revision_uindex ON kine (name, prev_revision)`, | ||
| } | ||
| procedureTemplate = []string{ | ||
| "declare", | ||
| "begin", | ||
| "%s", | ||
| "exception when others then", | ||
| "if SQLCODE = -955 then null; else raise; end if;", | ||
| "end;", | ||
| } | ||
| ) | ||
|
|
||
| func New(ctx context.Context, dataSourceName string) (server.Backend, error) { | ||
| parsedDSN, err := prepareDSN(dataSourceName) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| dialect, err := generic.Open(ctx, "godror", parsedDSN, "?", false) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| dialect.LastInsertID = true | ||
| dialect.TranslateErr = func(err error) error { | ||
| // ORA-00001: unique constraint violated | ||
| if err, ok := err.(*godror.OraErr); ok && err.Code() == 1 { | ||
| return server.ErrKeyExists | ||
| } | ||
| return err | ||
| } | ||
| if err := setup(dialect.DB); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| dialect.Migrate(context.Background()) | ||
| return logstructured.New(sqllog.New(dialect)), nil | ||
| } | ||
|
|
||
| func setup(db *sql.DB) error { | ||
| var str strings.Builder | ||
|
|
||
| for _, cmd := range procedureTemplate { | ||
| if cmd != "%s" { | ||
| str.WriteString(cmd + "\n") | ||
| } else { | ||
| for _, stmt := range schema { | ||
| str.WriteString(fmt.Sprintf("execute immediate '%s';\n", stmt)) | ||
| } | ||
| } | ||
| } | ||
| _, err := db.Exec(str.String()) | ||
| return err | ||
| } | ||
|
|
||
| func prepareDSN(dataSourceName string) (string, error) { | ||
| if len(dataSourceName) == 0 { | ||
| dataSourceName = defaultHostDSN | ||
| } | ||
| config, err := godror.ParseConnString(dataSourceName) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| parsedDSN := config.StringWithPassword() | ||
| return parsedDSN, nil | ||
| } | ||
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I am only lightly versed in oracle's SQL dialect, but why is it necessary to wrap all the queries in a templated procedure wrapper? Is that the only way to keep errors from messing up the connection state or something?