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https://gitee.com/dromara/mayfly-go
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61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package mssql
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import (
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"fmt"
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"io"
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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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)
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var (
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columnHelper = &ColumnHelper{}
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)
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type ColumnHelper struct {
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}
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func (ch *ColumnHelper) FixColumn(column *dbi.Column) {
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dataType := strings.ToLower(string(column.DataType))
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if collx.ArrayAnyMatches([]string{"date", "time"}, dataType) {
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// 如果是datetime，精度取NumScale字段
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column.CharMaxLength = column.NumScale
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} else if collx.ArrayAnyMatches([]string{"int", "bit", "real", "text", "xml"}, dataType) {
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// 不显示长度的类型
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column.NumPrecision = 0
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column.CharMaxLength = 0
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} else if collx.ArrayAnyMatches([]string{"numeric", "decimal", "float"}, dataType) {
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// 如果是num，长度取精度和小数位数
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column.CharMaxLength = 0
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} else if collx.ArrayAnyMatches([]string{"nvarchar", "nchar"}, dataType) {
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// 如果是nvarchar，可视长度减半
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column.CharMaxLength = column.CharMaxLength / 2
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}
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if collx.ArrayAnyMatches([]string{"char"}, dataType) {
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// char最大长度4000
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if column.CharMaxLength >= 4000 {
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column.DataType = "ntext"
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column.CharMaxLength = 0
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}
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}
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}
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type DumpHelper struct {
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dbi.DefaultDumpHelper
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}
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// mssql 在insert语句前后不能识别begin和commit语句
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func (dh *DumpHelper) BeforeInsert(writer io.Writer, tableName string) {
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}
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// mssql 在insert语句前后不能识别begin和commit语句
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func (dh *DumpHelper) AfterInsert(writer io.Writer, tableName string, columns []dbi.Column) {
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}
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func (dh *DumpHelper) BeforeInsertSql(quoteSchema string, tableName string) string {
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return fmt.Sprintf("set identity_insert %s.%s on ", quoteSchema, tableName)
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}
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