feat(db): 添加对达梦数据库的支持

- 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
2026-03-20 10:46:51 +08:00
parent 7ab803c5cc
commit b43f968b6c
194 changed files with 211502 additions and 2328 deletions
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2000-2018, 达梦数据库有限公司.
+ * All rights reserved.
+ */
+
+package dm
+
+const (
+	PARAM_COUNT_LIMIT int32 = 65536
+
+	IGNORE_TARGET_LENGTH int32 = -1
+
+	IGNORE_TARGET_SCALE int32 = -1
+
+	IGNORE_TARGET_TYPE = INT32_MIN
+
+	TYPE_FLAG_UNKNOWN byte = 0 // 未知类型
+
+	TYPE_FLAG_EXACT byte = 1 // 精确类型
+
+	TYPE_FLAG_RECOMMEND byte = 2 // 推荐类型
+
+	IO_TYPE_UNKNOWN int8 = -1
+
+	IO_TYPE_IN int8 = 0
+
+	IO_TYPE_OUT int8 = 1
+
+	IO_TYPE_INOUT int8 = 2
+
+	MASK_ORACLE_DATE int32 = 1
+
+	MASK_ORACLE_FLOAT int32 = 2
+
+	MASK_BFILE int32 = 3
+
+	MASK_LOCAL_DATETIME int32 = 4
+)
+
+type execRetInfo struct {
+	// param
+	outParamDatas [][]byte
+
+	// rs
+	hasResultSet bool
+
+	rsDatas [][][]byte
+
+	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
+	// 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）
+
+	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
+
+	rsBdta bool
+
+	rsUpdatable bool
+
+	rsRowIds []int64
+
+	// rs cache
+	tbIds []int32
+
+	tbTss []int64
+
+	// print
+	printLen int32
+
+	printMsg string
+
+	// explain
+	explain string
+
+	// 影响行数
+	updateCount int64 // Insert/Update/Delet影响行数， select结果集的总行数
+
+	updateCounts []int64 // 批量影响行数
+
+	// 键
+	rowid int64
+
+	lastInsertId int64
+
+	// other
+	retSqlType int16 // 执行返回的语句类型
+
+	execId int32
+
+	serverParams []parameter
+
+	nativeSQL string
+}
+
+type column struct {
+	typeName string
+
+	colType int32
+
+	prec int32
+
+	scale int32
+
+	name string
+
+	tableName string
+
+	schemaName string
+
+	nullable bool
+
+	identity bool
+
+	readonly bool // 是否只读
+
+	baseName string
+
+	// lob info
+	lob bool
+
+	lobTabId int32
+
+	lobColId int16
+
+	// 用于描述ARRAY、STRUCT类型的特有描述信息
+	typeDescriptor *TypeDescriptor
+
+	isBdta bool
+
+	mask int32
+}
+
+type parameter struct {
+	column
+
+	typeFlag byte
+
+	ioType int8
+
+	outJType int32
+
+	outScale int32
+
+	outObjectName string
+
+	cursorStmt *DmStatement
+
+	hasDefault bool
+}
+
+func (column *column) InitColumn() *column {
+	column.typeName = ""
+
+	column.colType = 0
+
+	column.prec = 0
+
+	column.scale = 0
+
+	column.name = ""
+
+	column.tableName = ""
+
+	column.schemaName = ""
+
+	column.nullable = false
+
+	column.identity = false
+
+	column.readonly = false
+
+	column.baseName = ""
+
+	// lob info
+	column.lob = false
+
+	column.lobTabId = 0
+
+	column.lobColId = 0
+
+	// 用于描述ARRAY、STRUCT类型的特有描述信息
+	column.typeDescriptor = nil
+
+	column.isBdta = false
+
+	return column
+}
+
+func (parameter *parameter) InitParameter() *parameter {
+	parameter.InitColumn()
+
+	parameter.typeFlag = TYPE_FLAG_UNKNOWN
+
+	parameter.ioType = IO_TYPE_UNKNOWN
+
+	parameter.outJType = IGNORE_TARGET_TYPE
+
+	parameter.outScale = IGNORE_TARGET_SCALE
+
+	parameter.outObjectName = ""
+
+	parameter.cursorStmt = nil
+
+	return parameter
+}
+
+func (parameter *parameter) resetType(colType int32) {
+	parameter.colType = colType
+	parameter.scale = 0
+	switch colType {
+	case BIT, BOOLEAN:
+		parameter.prec = BIT_PREC
+	case TINYINT:
+		parameter.prec = TINYINT_PREC
+	case SMALLINT:
+		parameter.prec = SMALLINT_PREC
+	case INT:
+		parameter.prec = INT_PREC
+	case BIGINT:
+		parameter.prec = BIGINT_PREC
+	case CHAR, VARCHAR, VARCHAR2:
+		parameter.prec = VARCHAR_PREC
+	case CLOB:
+		parameter.prec = CLOB_PREC
+	case BINARY, VARBINARY:
+		parameter.prec = VARBINARY_PREC
+	case BLOB:
+		parameter.prec = BLOB_PREC
+	case DATE:
+		parameter.prec = DATE_PREC
+	case TIME:
+		parameter.prec = TIME_PREC
+		parameter.scale = 6
+	case TIME_TZ:
+		parameter.prec = TIME_TZ_PREC
+		parameter.scale = 6
+	case DATETIME:
+		parameter.prec = DATETIME_PREC
+		parameter.scale = 6
+	case DATETIME_TZ:
+		parameter.prec = DATETIME_TZ_PREC
+		parameter.scale = 6
+	case DATETIME2:
+		parameter.prec = DATETIME2_PREC
+		parameter.scale = 9
+	case DATETIME2_TZ:
+		parameter.prec = DATETIME2_TZ_PREC
+		parameter.scale = 9
+	case REAL,DOUBLE,DECIMAL,INTERVAL_YM,INTERVAL_DT,ARRAY,CLASS,PLTYPE_RECORD,SARRAY:
+		parameter.prec = 0
+	case UNKNOWN, NULL:
+		// UNKNOWN 导致服务器断言 // setNull导致服务器报错“字符转换失败”
+		parameter.colType = VARCHAR
+		parameter.prec = VARCHAR_PREC
+	default:
+	}
+}
+
+func (execInfo *execRetInfo) union(other *execRetInfo, startRow int, count int) {
+	if count == 1 {
+		execInfo.updateCounts[startRow] = other.updateCount
+	} else if execInfo.updateCounts != nil && other.updateCounts != nil{
+		copy(execInfo.updateCounts[startRow:startRow+count], other.updateCounts[0:count])
+	}
+	if execInfo.outParamDatas != nil {
+		execInfo.outParamDatas = append(execInfo.outParamDatas, other.outParamDatas...)
+	}
+}
+
+func NewExceInfo() *execRetInfo {
+
+	execInfo := execRetInfo{}
+
+	execInfo.outParamDatas = nil
+
+	execInfo.hasResultSet = false
+
+	execInfo.rsDatas = nil
+
+	execInfo.rsSizeof = 0
+
+	execInfo.rsCacheOffset = 0
+
+	execInfo.rsBdta = false
+
+	execInfo.rsUpdatable = false
+
+	execInfo.rsRowIds = nil
+
+	execInfo.tbIds = nil
+
+	execInfo.tbTss = nil
+
+	execInfo.printLen = 0
+
+	execInfo.printMsg = ""
+
+	execInfo.explain = ""
+
+	execInfo.updateCount = 0
+
+	execInfo.updateCounts = nil
+
+	execInfo.rowid = -1
+
+	execInfo.lastInsertId = 0
+	// other
+	execInfo.retSqlType = -1 // 执行返回的语句类型
+
+	execInfo.execId = 0
+
+	return &execInfo
+}