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https://gitee.com/dromara/mayfly-go
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109 lines
3.3 KiB
Go
109 lines
3.3 KiB
Go
package oracle
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import (
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/utils/collx"
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"strings"
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"github.com/may-fly/cast"
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)
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const (
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ORACLE11_COLUMN_MA_KEY = "ORACLE11_COLUMN_MA"
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)
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type OracleMetadata11 struct {
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OracleMetadata
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}
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// 获取列元信息, 如列名等
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func (od *OracleMetadata11) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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dialect := od.dc.GetDialect()
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tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", dialect.Quoter().Trim(val))
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}), ",")
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// 如果表数量超过了1000，需要分批查询
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if len(tableNames) > 1000 {
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columns := make([]dbi.Column, 0)
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for i := 0; i < len(tableNames); i += 1000 {
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end := i + 1000
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if end > len(tableNames) {
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end = len(tableNames)
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}
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tables := tableNames[i:end]
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cols, err := od.GetColumns(tables...)
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if err != nil {
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return nil, err
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}
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columns = append(columns, cols...)
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}
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return columns, nil
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}
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_, res, err := od.dc.Query(fmt.Sprintf(dbi.GetLocalSql(ORACLE_META_FILE, ORACLE11_COLUMN_MA_KEY), tableName))
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if err != nil {
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return nil, err
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}
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columns := make([]dbi.Column, 0)
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for _, re := range res {
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column := dbi.Column{
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TableName: cast.ToString(re["TABLE_NAME"]),
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ColumnName: cast.ToString(re["COLUMN_NAME"]),
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DataType: cast.ToString(re["DATA_TYPE"]),
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CharMaxLength: cast.ToInt(re["CHAR_MAX_LENGTH"]),
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ColumnComment: cast.ToString(re["COLUMN_COMMENT"]),
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Nullable: cast.ToString(re["NULLABLE"]) == "YES",
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IsPrimaryKey: cast.ToInt(re["IS_PRIMARY_KEY"]) == 1,
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IsIdentity: cast.ToInt(re["IS_IDENTITY"]) == 1,
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ColumnDefault: cast.ToString(re["COLUMN_DEFAULT"]),
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NumPrecision: cast.ToInt(re["NUM_PRECISION"]),
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NumScale: cast.ToInt(re["NUM_SCALE"]),
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}
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od.dc.GetDbDataType(column.DataType).FixColumn(&column)
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columns = append(columns, column)
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}
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return columns, nil
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}
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func (od *OracleMetadata11) genColumnBasicSql(column dbi.Column) string {
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dialect := od.dc.GetDialect()
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colName := dialect.Quoter().Quote(column.ColumnName)
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if column.IsIdentity {
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// 11g以前的版本 如果是自增，自增列数据类型必须是number，不需要设置默认值和空值，建表后设置自增序列
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return fmt.Sprintf(" %s NUMBER", colName)
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}
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nullAble := ""
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if !column.Nullable {
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nullAble = " NOT NULL"
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}
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defVal := ""
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if column.ColumnDefault != "" {
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defVal = fmt.Sprintf(" DEFAULT %v", column.ColumnDefault)
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}
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columnSql := fmt.Sprintf(" %s %s%s%s", colName, column.GetColumnType(), defVal, nullAble)
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return columnSql
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}
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// 11g及以下版本会设置自增序列和触发器
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func (od *OracleMetadata11) GenerateTableOtherDDL(tableInfo dbi.Table, quoteTableName string, columns []dbi.Column) []string {
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result := make([]string, 0)
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for _, col := range columns {
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if col.IsIdentity {
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seqName := fmt.Sprintf("%s_%s_seq", tableInfo.TableName, col.ColumnName)
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trgName := fmt.Sprintf("%s_%s_trg", tableInfo.TableName, col.ColumnName)
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result = append(result, fmt.Sprintf("CREATE SEQUENCE %s START WITH 1 INCREMENT BY 1", seqName))
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result = append(result, fmt.Sprintf("CREATE OR REPLACE TRIGGER %s BEFORE INSERT ON %s FOR EACH ROW WHEN (NEW.%s IS NULL) BEGIN SELECT %s.nextval INTO :new.%s FROM dual; END", trgName, quoteTableName, col.ColumnName, seqName, col.ColumnName))
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}
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}
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return result
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}
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