47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package migrate
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import (
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"strconv"
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"strings"
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"github.com/russross/meddler"
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)
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// transform is a helper function that transforms sql
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// statements to work with multiple database types.
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func transform(stmt string) string {
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switch meddler.Default {
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case meddler.MySQL:
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stmt = strings.Replace(stmt, "AUTOINCREMENT", "AUTO_INCREMENT", -1)
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stmt = strings.Replace(stmt, "BLOB", "MEDIUMBLOB", -1)
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case meddler.PostgreSQL:
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stmt = strings.Replace(stmt, "INTEGER PRIMARY KEY AUTOINCREMENT", "SERIAL PRIMARY KEY", -1)
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stmt = strings.Replace(stmt, "BLOB", "BYTEA", -1)
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}
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return stmt
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}
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// rebind is a helper function that changes the sql
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// bind type from ? to $ for postgres queries.
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func rebind(query string) string {
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if meddler.Default != meddler.PostgreSQL {
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return query
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}
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qb := []byte(query)
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// Add space enough for 10 params before we have to allocate
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rqb := make([]byte, 0, len(qb)+10)
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j := 1
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for _, b := range qb {
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if b == '?' {
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rqb = append(rqb, '$')
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for _, b := range strconv.Itoa(j) {
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rqb = append(rqb, byte(b))
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}
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j++
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} else {
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rqb = append(rqb, b)
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}
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}
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return string(rqb)
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}
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