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docs: sample for the UUID data type #439

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7d6ee5f
feat: uuid data type
olavloite May 20, 2025
7b391b4
Merge branch 'main' into uuid-sample
olavloite Jun 25, 2025
a8b5faa
Merge branch 'main' into uuid-sample
olavloite Aug 18, 2025
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16 changes: 10 additions & 6 deletions examples/data-types/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ import (
"context"
"database/sql"
"fmt"
"github.com/google/uuid"
"math/big"
"time"

Expand All @@ -38,6 +39,7 @@ var createTableStatement = `CREATE TABLE AllTypes (
numeric NUMERIC,
date DATE,
timestamp TIMESTAMP,
col_uuid UUID,
boolArray ARRAY<BOOL>,
stringArray ARRAY<STRING(MAX)>,
bytesArray ARRAY<BYTES(MAX)>,
Expand All @@ -47,6 +49,7 @@ var createTableStatement = `CREATE TABLE AllTypes (
numericArray ARRAY<NUMERIC>,
dateArray ARRAY<DATE>,
timestampArray ARRAY<TIMESTAMP>,
uuidArray ARRAY<UUID>,
) PRIMARY KEY (key)`

// Sample showing how to work with the different data types that are supported by Cloud Spanner:
Expand All @@ -68,15 +71,16 @@ func dataTypes(projectId, instanceId, databaseId string) error {

// Insert a test row with all non-null values using DML and native types.
if _, err := db.ExecContext(ctx, `INSERT INTO AllTypes (
key, bool, string, bytes, int64, float32, float64, numeric, date, timestamp,
boolArray, stringArray, bytesArray, int64Array, float32Array, float64Array, numericArray, dateArray, timestampArray)
VALUES (@key, @bool, @string, @bytes, @int64, @float32, @float64, @numeric, @date, @timestamp,
@boolArray, @stringArray, @bytesArray, @int64Array, @float32Array, @float64Array, @numericArray, @dateArray, @timestampArray)`,
1, true, "string", []byte("bytes"), 100, float32(3.14), 3.14, *big.NewRat(1, 1), civil.DateOf(time.Now()), time.Now(),
key, bool, string, bytes, int64, float32, float64, numeric, date, timestamp, col_uuid,
boolArray, stringArray, bytesArray, int64Array, float32Array, float64Array, numericArray, dateArray, timestampArray, uuidArray)
VALUES (@key, @bool, @string, @bytes, @int64, @float32, @float64, @numeric, @date, @timestamp, @uuid,
@boolArray, @stringArray, @bytesArray, @int64Array, @float32Array, @float64Array, @numericArray, @dateArray, @timestampArray, @uuidArray)`,
1, true, "string", []byte("bytes"), 100, float32(3.14), 3.14, *big.NewRat(1, 1), civil.DateOf(time.Now()), time.Now(), uuid.New(),
[]bool{true, false}, []string{"s1", "s2"}, [][]byte{[]byte("b1"), []byte("b2")}, []int64{1, 2},
[]float32{1.1, 2.2}, []float64{1.1, 2.2}, []big.Rat{*big.NewRat(1, 2), *big.NewRat(1, 3)},
[]civil.Date{{Year: 2021, Month: 10, Day: 12}, {Year: 2021, Month: 10, Day: 13}},
[]time.Time{time.Now(), time.Now().Add(24 * time.Hour)}); err != nil {
[]time.Time{time.Now(), time.Now().Add(24 * time.Hour)},
[]uuid.UUID{uuid.New(), uuid.New()}); err != nil {
return fmt.Errorf("failed to insert a record with all non-null values using DML: %v", err)
}
fmt.Print("Inserted a test record with all non-null values\n")
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