/
oracle.go
267 lines (243 loc) · 5.87 KB
/
oracle.go
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package database
import (
"context"
"database/sql"
"log"
"strconv"
_ "github.com/godror/godror"
"github.com/sqls-server/sqls/dialect"
)
func init() {
RegisterOpen("oracle", oracleOpen)
RegisterFactory("oracle", NewOracleDBRepository)
}
func oracleOpen(dbConnCfg *DBConfig) (*DBConnection, error) {
var (
conn *sql.DB
)
DSName, err := genOracleConfig(dbConnCfg)
if err != nil {
return nil, err
}
conn, err = sql.Open("godror", DSName)
if err != nil {
return nil, err
}
conn.SetMaxIdleConns(DefaultMaxIdleConns)
conn.SetMaxOpenConns(DefaultMaxOpenConns)
return &DBConnection{
Conn: conn,
Driver: dialect.DatabaseDriverOracle,
}, nil
}
func genOracleConfig(connCfg *DBConfig) (string, error) {
if connCfg.DataSourceName != "" {
return connCfg.DataSourceName, nil
}
host, port := connCfg.Host, connCfg.Port
if host == "" {
host = "127.0.0.1"
}
if port == 0 {
port = 1521
}
DSName := connCfg.User + "/" + connCfg.Passwd + "@" + host + ":" + strconv.Itoa(port) + "/" + connCfg.DBName
return DSName, nil
}
type OracleDBRepository struct {
Conn *sql.DB
}
func NewOracleDBRepository(conn *sql.DB) DBRepository {
return &OracleDBRepository{Conn: conn}
}
func (db *OracleDBRepository) Driver() dialect.DatabaseDriver {
return dialect.DatabaseDriverOracle
}
func (db *OracleDBRepository) CurrentDatabase(ctx context.Context) (string, error) {
row := db.Conn.QueryRowContext(ctx, "SELECT SYS_CONTEXT('USERENV','CURRENT_SCHEMA') FROM DUAL")
var database string
if err := row.Scan(&database); err != nil {
return "", err
}
return database, nil
}
func (db *OracleDBRepository) Databases(ctx context.Context) ([]string, error) {
// one DB per connection for Oracle
rows, err := db.Conn.QueryContext(ctx, "SELECT USERNAME FROM SYS.ALL_USERS ORDER BY USERNAME")
if err != nil {
return nil, err
}
defer rows.Close()
databases := []string{}
for rows.Next() {
var database string
if err := rows.Scan(&database); err != nil {
return nil, err
}
databases = append(databases, database)
}
return databases, nil
}
func (db *OracleDBRepository) CurrentSchema(ctx context.Context) (string, error) {
return db.CurrentDatabase(ctx)
}
func (db *OracleDBRepository) Schemas(ctx context.Context) ([]string, error) {
return db.Databases(ctx)
}
func (db *OracleDBRepository) SchemaTables(ctx context.Context) (map[string][]string, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT OWNER, TABLE_NAME
FROM SYS.ALL_TABLES
ORDER BY OWNER, TABLE_NAME
`)
if err != nil {
return nil, err
}
defer rows.Close()
databaseTables := map[string][]string{}
for rows.Next() {
var schema, table string
if err := rows.Scan(&schema, &table); err != nil {
return nil, err
}
if arr, ok := databaseTables[schema]; ok {
databaseTables[schema] = append(arr, table)
} else {
databaseTables[schema] = []string{table}
}
}
return databaseTables, nil
}
func (db *OracleDBRepository) Tables(ctx context.Context) ([]string, error) {
rows, err := db.Conn.QueryContext(ctx, "SELECT TABLE_NAME FROM USER_TABLES")
if err != nil {
return nil, err
}
defer rows.Close()
tables := []string{}
for rows.Next() {
var table string
if err := rows.Scan(&table); err != nil {
return nil, err
}
tables = append(tables, table)
}
return tables, nil
}
func (db *OracleDBRepository) DescribeDatabaseTable(ctx context.Context) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
OWNER,
TABLE_NAME,
COLUMN_NAME,
DATA_TYPE,
NULLABLE,
'',
DATA_DEFAULT,
''
FROM SYS.ALL_TAB_COLUMNS
`)
if err != nil {
return nil, err
}
defer rows.Close()
tableInfos := []*ColumnDesc{}
for rows.Next() {
var tableInfo ColumnDesc
err := rows.Scan(
&tableInfo.Schema,
&tableInfo.Table,
&tableInfo.Name,
&tableInfo.Type,
&tableInfo.Null,
&tableInfo.Key,
&tableInfo.Default,
&tableInfo.Extra,
)
if err != nil {
return nil, err
}
tableInfos = append(tableInfos, &tableInfo)
}
return tableInfos, nil
}
func (db *OracleDBRepository) DescribeDatabaseTableBySchema(ctx context.Context, schemaName string) ([]*ColumnDesc, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT
OWNER,
TABLE_NAME,
COLUMN_NAME,
DATA_TYPE,
CASE NULLABLE
WHEN 'Y' THEN 'YES'
ELSE 'NO'
END,
'1',
DATA_DEFAULT,
'1'
FROM SYS.ALL_TAB_COLUMNS
WHERE OWNER = :1
`, schemaName)
if err != nil {
log.Println("schema", schemaName, err.Error())
return nil, err
}
tableInfos := []*ColumnDesc{}
for rows.Next() {
var tableInfo ColumnDesc
err := rows.Scan(
&tableInfo.Schema,
&tableInfo.Table,
&tableInfo.Name,
&tableInfo.Type,
&tableInfo.Null,
&tableInfo.Key,
&tableInfo.Default,
&tableInfo.Extra,
)
if err != nil {
return nil, err
}
tableInfos = append(tableInfos, &tableInfo)
}
defer rows.Close()
return tableInfos, nil
}
func (db *OracleDBRepository) DescribeForeignKeysBySchema(ctx context.Context, schemaName string) ([]*ForeignKey, error) {
rows, err := db.Conn.QueryContext(
ctx,
`
SELECT a.CONSTRAINT_NAME,
a.TABLE_NAME,
a.COLUMN_NAME,
b.TABLE_NAME,
b.COLUMN_NAME
FROM ALL_CONS_COLUMNS a
JOIN ALL_CONSTRAINTS c ON a.OWNER = c.OWNER
AND a.CONSTRAINT_NAME = c.CONSTRAINT_NAME
JOIN ALL_CONSTRAINTS c_pk ON c.R_OWNER = c_pk.OWNER
AND c.R_CONSTRAINT_NAME = c_pk.CONSTRAINT_NAME
JOIN ALL_CONS_COLUMNS b ON b.CONSTRAINT_NAME = c_pk.CONSTRAINT_NAME
AND b.POSITION = a.POSITION
WHERE c.constraint_type = 'R'
AND a.OWNER = :1
ORDER BY a.CONSTRAINT_NAME, a.POSITION
`, schemaName)
if err != nil {
log.Fatal(err)
}
defer func() { _ = rows.Close() }()
return parseForeignKeys(rows, schemaName)
}
func (db *OracleDBRepository) Exec(ctx context.Context, query string) (sql.Result, error) {
return db.Conn.ExecContext(ctx, query)
}
func (db *OracleDBRepository) Query(ctx context.Context, query string) (*sql.Rows, error) {
return db.Conn.QueryContext(ctx, query)
}