refactor: dbm

server/internal/db/dbm/mssql/sqlgen.go

@@ -0,0 +1,146 @@
+package mssql
+
+import (
+	"fmt"
+	"mayfly-go/internal/db/dbm/dbi"
+	"mayfly-go/pkg/utils/collx"
+	"strings"
+)
+
+type SQLGenerator struct {
+	dc *dbi.DbConn
+}
+
+func (sg *SQLGenerator) GenTableDDL(table dbi.Table, columns []dbi.Column, dropBeforeCreate bool) []string {
+	tbName := table.TableName
+	schemaName := sg.dc.Info.CurrentSchema()
+
+	quoter := sg.dc.GetDialect().Quoter()
+	quote := quoter.Quote
+
+	sqlArr := make([]string, 0)
+
+	// 删除表
+	if dropBeforeCreate {
+		sqlArr = append(sqlArr, fmt.Sprintf("DROP TABLE IF EXISTS %s.%s", quote(schemaName), quote(tbName)))
+	}
+
+	// 组装建表语句
+	createSql := fmt.Sprintf("CREATE TABLE %s.%s (\n", quote(schemaName), quote(tbName))
+	fields := make([]string, 0)
+	pks := make([]string, 0)
+	columnComments := make([]string, 0)
+
+	for _, column := range columns {
+		if column.IsPrimaryKey {
+			pks = append(pks, quote(column.ColumnName))
+		}
+		fields = append(fields, sg.genColumnBasicSql(quoter, column))
+		commentTmp := "EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s', N'COLUMN', N'%s'"
+
+		// 防止注释内含有特殊字符串导致sql出错
+		if column.ColumnComment != "" {
+			comment := dbi.QuoteEscape(column.ColumnComment)
+			columnComments = append(columnComments, fmt.Sprintf(commentTmp, comment, sg.dc.Info.CurrentSchema(), tbName, column.ColumnName))
+		}
+	}
+
+	// create
+	createSql += strings.Join(fields, ",\n")
+	if len(pks) > 0 {
+		createSql += fmt.Sprintf(", \n PRIMARY KEY CLUSTERED (%s)", strings.Join(pks, ","))
+	}
+	createSql += "\n)"
+
+	// comment
+	tableCommentSql := ""
+	if table.TableComment != "" {
+		commentTmp := "EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s'"
+
+		tableCommentSql = fmt.Sprintf(commentTmp, dbi.QuoteEscape(table.TableComment), sg.dc.Info.CurrentSchema(), tbName)
+	}
+
+	sqlArr = append(sqlArr, createSql)
+
+	if tableCommentSql != "" {
+		sqlArr = append(sqlArr, tableCommentSql)
+	}
+	if len(columnComments) > 0 {
+		sqlArr = append(sqlArr, columnComments...)
+	}
+
+	return sqlArr
+}
+
+func (sg *SQLGenerator) GenIndexDDL(table dbi.Table, indexs []dbi.Index) []string {
+	quote := sg.dc.GetDialect().Quoter().Quote
+	tbName := table.TableName
+	sqls := make([]string, 0)
+	comments := make([]string, 0)
+	for _, index := range indexs {
+		unique := ""
+		if index.IsUnique {
+			unique = "unique"
+		}
+		// 取出列名，添加引号
+		cols := strings.Split(index.ColumnName, ",")
+		colNames := make([]string, len(cols))
+		for i, name := range cols {
+			colNames[i] = quote(name)
+		}
+
+		sqls = append(sqls, fmt.Sprintf("create %s NONCLUSTERED index %s on %s.%s(%s)", unique, quote(index.IndexName), quote(sg.dc.Info.CurrentSchema()), quote(tbName), strings.Join(colNames, ",")))
+		if index.IndexComment != "" {
+			comment := dbi.QuoteEscape(index.IndexComment)
+			comments = append(comments, fmt.Sprintf("EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s', N'INDEX', N'%s'", comment, sg.dc.Info.CurrentSchema(), tbName, index.IndexName))
+		}
+	}
+	if len(comments) > 0 {
+		sqls = append(sqls, comments...)
+	}
+
+	return sqls
+}
+
+func (sg *SQLGenerator) GenInsert(tableName string, columns []dbi.Column, values [][]any, duplicateStrategy int) []string {
+	return collx.AsArray("")
+}
+
+func (msg *SQLGenerator) genColumnBasicSql(quoter dbi.Quoter, column dbi.Column) string {
+	colName := quoter.Quote(column.ColumnName)
+	dataType := string(column.DataType)
+
+	incr := ""
+	if column.IsIdentity {
+		incr = " IDENTITY(1,1)"
+	}
+
+	nullAble := ""
+	if !column.Nullable {
+		nullAble = " NOT NULL"
+	}
+
+	defVal := "" // 默认值需要判断引号，如函数是不需要引号的 // 为了防止跨源函数不支持 当默认值是函数时，不需要设置默认值
+	if column.ColumnDefault != "" && !strings.Contains(column.ColumnDefault, "(") {
+		// 哪些字段类型默认值需要加引号
+		mark := false
+		if collx.ArrayAnyMatches([]string{"char", "text", "date", "time", "lob"}, dataType) {
+			// 当数据类型是日期时间，默认值是日期时间函数时，默认值不需要引号
+			if collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(dataType)) &&
+				collx.ArrayAnyMatches([]string{"DATE", "TIME"}, strings.ToUpper(column.ColumnDefault)) {
+				mark = false
+			} else {
+				mark = true
+			}
+		}
+
+		if mark {
+			defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
+		} else {
+			defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
+		}
+	}
+
+	columnSql := fmt.Sprintf(" %s %s%s%s%s", colName, column.GetColumnType(), incr, nullAble, defVal)
+	return columnSql
+}