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func_test.go
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func_test.go
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package sqlite3_test
import (
"bytes"
"fmt"
"log"
"regexp"
"github.com/ncruces/go-sqlite3"
_ "github.com/ncruces/go-sqlite3/embed"
"github.com/ncruces/go-sqlite3/ext/unicode"
_ "github.com/ncruces/go-sqlite3/internal/testcfg"
)
func ExampleConn_CreateCollation() {
db, err := sqlite3.Open(":memory:")
if err != nil {
log.Fatal(err)
}
defer db.Close()
err = db.Exec(`CREATE TABLE words (word VARCHAR(10))`)
if err != nil {
log.Fatal(err)
}
err = db.Exec(`INSERT INTO words (word) VALUES ('côte'), ('cote'), ('coter'), ('coté'), ('cotée'), ('côté')`)
if err != nil {
log.Fatal(err)
}
err = db.CollationNeeded(func(db *sqlite3.Conn, name string) {
err := unicode.RegisterCollation(db, name, name)
if err != nil {
log.Fatal(err)
}
})
if err != nil {
log.Fatal(err)
}
stmt, _, err := db.Prepare(`SELECT word FROM words ORDER BY word COLLATE fr_FR`)
if err != nil {
log.Fatal(err)
}
defer stmt.Close()
for stmt.Step() {
fmt.Println(stmt.ColumnText(0))
}
if err := stmt.Err(); err != nil {
log.Fatal(err)
}
// Output:
// cote
// coté
// côte
// côté
// cotée
// coter
}
func ExampleConn_CreateFunction() {
db, err := sqlite3.Open(":memory:")
if err != nil {
log.Fatal(err)
}
defer db.Close()
err = db.Exec(`CREATE TABLE words (word VARCHAR(10))`)
if err != nil {
log.Fatal(err)
}
err = db.Exec(`INSERT INTO words (word) VALUES ('côte'), ('cote'), ('coter'), ('coté'), ('cotée'), ('côté')`)
if err != nil {
log.Fatal(err)
}
err = db.CreateFunction("upper", 1, sqlite3.DETERMINISTIC|sqlite3.INNOCUOUS, func(ctx sqlite3.Context, arg ...sqlite3.Value) {
ctx.ResultRawText(bytes.ToUpper(arg[0].RawText()))
})
if err != nil {
log.Fatal(err)
}
stmt, _, err := db.Prepare(`SELECT upper(word) FROM words`)
if err != nil {
log.Fatal(err)
}
defer stmt.Close()
for stmt.Step() {
fmt.Println(stmt.ColumnText(0))
}
if err := stmt.Err(); err != nil {
log.Fatal(err)
}
// Unordered output:
// COTE
// COTÉ
// CÔTE
// CÔTÉ
// COTÉE
// COTER
}
func ExampleContext_SetAuxData() {
db, err := sqlite3.Open(":memory:")
if err != nil {
log.Fatal(err)
}
defer db.Close()
err = db.Exec(`CREATE TABLE words (word VARCHAR(10))`)
if err != nil {
log.Fatal(err)
}
err = db.Exec(`INSERT INTO words (word) VALUES ('côte'), ('cote'), ('coter'), ('coté'), ('cotée'), ('côté')`)
if err != nil {
log.Fatal(err)
}
err = db.CreateFunction("regexp", 2, sqlite3.DETERMINISTIC|sqlite3.INNOCUOUS, func(ctx sqlite3.Context, arg ...sqlite3.Value) {
re, ok := ctx.GetAuxData(0).(*regexp.Regexp)
if !ok {
r, err := regexp.Compile(arg[0].Text())
if err != nil {
ctx.ResultError(err)
return
}
ctx.SetAuxData(0, r)
re = r
}
ctx.ResultBool(re.Match(arg[1].RawText()))
})
if err != nil {
log.Fatal(err)
}
stmt, _, err := db.Prepare(`SELECT word FROM words WHERE word REGEXP '^\p{L}+e$'`)
if err != nil {
log.Fatal(err)
}
defer stmt.Close()
for stmt.Step() {
fmt.Println(stmt.ColumnText(0))
}
if err := stmt.Err(); err != nil {
log.Fatal(err)
}
// Unordered output:
// cote
// côte
// cotée
}