hoteas
7f7b585ffb
- 在应用程序中新增对达梦数据库（DM）的配置和连接支持 - 实现 SetDmDB 函数以配置达梦数据库连接 - 更新数据库操作逻辑，支持达梦特有的 SQL 语法和功能 - 在相关文件中添加达梦数据库的处理逻辑，包括表创建、数据插入和查询 - 更新 go.mod 和 go.sum 文件以引入达梦数据库驱动 - 增强文档，详细说明达梦数据库的配置和使用方法
312 lines
5.2 KiB
Go
312 lines
5.2 KiB
Go
/*
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* Copyright (c) 2000-2018, 达梦数据库有限公司.
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* All rights reserved.
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*/
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package dm
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const (
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PARAM_COUNT_LIMIT int32 = 65536
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IGNORE_TARGET_LENGTH int32 = -1
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IGNORE_TARGET_SCALE int32 = -1
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IGNORE_TARGET_TYPE = INT32_MIN
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TYPE_FLAG_UNKNOWN byte = 0 // 未知类型
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TYPE_FLAG_EXACT byte = 1 // 精确类型
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TYPE_FLAG_RECOMMEND byte = 2 // 推荐类型
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IO_TYPE_UNKNOWN int8 = -1
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IO_TYPE_IN int8 = 0
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IO_TYPE_OUT int8 = 1
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IO_TYPE_INOUT int8 = 2
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MASK_ORACLE_DATE int32 = 1
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MASK_ORACLE_FLOAT int32 = 2
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MASK_BFILE int32 = 3
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MASK_LOCAL_DATETIME int32 = 4
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)
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type execRetInfo struct {
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// param
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outParamDatas [][]byte
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// rs
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hasResultSet bool
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rsDatas [][][]byte
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rsSizeof int // 结果集数据占用多少空间，（消息中结果集起始位置到 rsCacheOffset
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// 的空间大小，这和实际的rsDatas占用空间大小有一定出入，这里粗略估算，用于结果集缓存时的空间管理）
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rsCacheOffset int32 // 缓存信息，在响应消息体中的偏移，0表示不存在，仅结果集缓存中可以用
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rsBdta bool
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rsUpdatable bool
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rsRowIds []int64
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// rs cache
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tbIds []int32
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tbTss []int64
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// print
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printLen int32
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printMsg string
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// explain
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explain string
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// 影响行数
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updateCount int64 // Insert/Update/Delet影响行数， select结果集的总行数
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updateCounts []int64 // 批量影响行数
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// 键
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rowid int64
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lastInsertId int64
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// other
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retSqlType int16 // 执行返回的语句类型
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execId int32
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serverParams []parameter
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nativeSQL string
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}
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type column struct {
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typeName string
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colType int32
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prec int32
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scale int32
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name string
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tableName string
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schemaName string
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nullable bool
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identity bool
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readonly bool // 是否只读
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baseName string
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// lob info
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lob bool
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lobTabId int32
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lobColId int16
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// 用于描述ARRAY、STRUCT类型的特有描述信息
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typeDescriptor *TypeDescriptor
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isBdta bool
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mask int32
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}
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type parameter struct {
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column
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typeFlag byte
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ioType int8
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outJType int32
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outScale int32
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outObjectName string
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cursorStmt *DmStatement
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hasDefault bool
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}
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func (column *column) InitColumn() *column {
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column.typeName = ""
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column.colType = 0
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column.prec = 0
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column.scale = 0
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column.name = ""
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column.tableName = ""
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column.schemaName = ""
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column.nullable = false
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column.identity = false
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column.readonly = false
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column.baseName = ""
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// lob info
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column.lob = false
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column.lobTabId = 0
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column.lobColId = 0
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// 用于描述ARRAY、STRUCT类型的特有描述信息
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column.typeDescriptor = nil
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column.isBdta = false
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return column
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}
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func (parameter *parameter) InitParameter() *parameter {
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parameter.InitColumn()
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parameter.typeFlag = TYPE_FLAG_UNKNOWN
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parameter.ioType = IO_TYPE_UNKNOWN
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parameter.outJType = IGNORE_TARGET_TYPE
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parameter.outScale = IGNORE_TARGET_SCALE
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parameter.outObjectName = ""
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parameter.cursorStmt = nil
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return parameter
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}
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func (parameter *parameter) resetType(colType int32) {
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parameter.colType = colType
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parameter.scale = 0
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switch colType {
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case BIT, BOOLEAN:
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parameter.prec = BIT_PREC
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case TINYINT:
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parameter.prec = TINYINT_PREC
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case SMALLINT:
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parameter.prec = SMALLINT_PREC
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case INT:
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parameter.prec = INT_PREC
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case BIGINT:
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parameter.prec = BIGINT_PREC
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case CHAR, VARCHAR, VARCHAR2:
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parameter.prec = VARCHAR_PREC
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case CLOB:
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parameter.prec = CLOB_PREC
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case BINARY, VARBINARY:
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parameter.prec = VARBINARY_PREC
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case BLOB:
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parameter.prec = BLOB_PREC
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case DATE:
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parameter.prec = DATE_PREC
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case TIME:
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parameter.prec = TIME_PREC
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parameter.scale = 6
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case TIME_TZ:
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parameter.prec = TIME_TZ_PREC
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parameter.scale = 6
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case DATETIME:
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parameter.prec = DATETIME_PREC
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parameter.scale = 6
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case DATETIME_TZ:
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parameter.prec = DATETIME_TZ_PREC
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parameter.scale = 6
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case DATETIME2:
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parameter.prec = DATETIME2_PREC
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parameter.scale = 9
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case DATETIME2_TZ:
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parameter.prec = DATETIME2_TZ_PREC
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parameter.scale = 9
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case REAL,DOUBLE,DECIMAL,INTERVAL_YM,INTERVAL_DT,ARRAY,CLASS,PLTYPE_RECORD,SARRAY:
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parameter.prec = 0
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case UNKNOWN, NULL:
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// UNKNOWN 导致服务器断言 // setNull导致服务器报错“字符转换失败”
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parameter.colType = VARCHAR
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parameter.prec = VARCHAR_PREC
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default:
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}
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}
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func (execInfo *execRetInfo) union(other *execRetInfo, startRow int, count int) {
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if count == 1 {
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execInfo.updateCounts[startRow] = other.updateCount
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} else if execInfo.updateCounts != nil && other.updateCounts != nil{
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copy(execInfo.updateCounts[startRow:startRow+count], other.updateCounts[0:count])
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}
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if execInfo.outParamDatas != nil {
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execInfo.outParamDatas = append(execInfo.outParamDatas, other.outParamDatas...)
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}
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}
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func NewExceInfo() *execRetInfo {
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execInfo := execRetInfo{}
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execInfo.outParamDatas = nil
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execInfo.hasResultSet = false
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execInfo.rsDatas = nil
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execInfo.rsSizeof = 0
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execInfo.rsCacheOffset = 0
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execInfo.rsBdta = false
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execInfo.rsUpdatable = false
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execInfo.rsRowIds = nil
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execInfo.tbIds = nil
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execInfo.tbTss = nil
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execInfo.printLen = 0
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execInfo.printMsg = ""
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execInfo.explain = ""
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execInfo.updateCount = 0
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execInfo.updateCounts = nil
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execInfo.rowid = -1
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execInfo.lastInsertId = 0
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// other
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execInfo.retSqlType = -1 // 执行返回的语句类型
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execInfo.execId = 0
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return &execInfo
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}
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