dttung2905 commented on code in PR #414:
URL: https://github.com/apache/iceberg-go/pull/414#discussion_r2076094123
##########
catalog/sql/sql.go:
##########
@@ -844,3 +871,235 @@ func (c *Catalog) UpdateNamespaceProperties(ctx
context.Context, namespace table
func (c *Catalog) CheckNamespaceExists(ctx context.Context, namespace
table.Identifier) (bool, error) {
return c.namespaceExists(ctx, strings.Join(namespace, "."))
}
+
+// CreateView creates a new view in the catalog.
+func (c *Catalog) CreateView(ctx context.Context, identifier table.Identifier,
schema *iceberg.Schema, viewSQL string, props iceberg.Properties) error {
+ nsIdent := catalog.NamespaceFromIdent(identifier)
+ viewIdent := catalog.TableNameFromIdent(identifier)
+ ns := strings.Join(nsIdent, ".")
+
+ exists, err := c.namespaceExists(ctx, ns)
+ if err != nil {
+ return err
+ }
+ if !exists {
+ return fmt.Errorf("%w: %s", catalog.ErrNoSuchNamespace, ns)
+ }
+
+ exists, err = c.CheckViewExists(ctx, identifier)
+ if err != nil {
+ return err
+ }
+ if exists {
+ return fmt.Errorf("%w: %s", catalog.ErrViewAlreadyExists,
identifier)
+ }
+
+ viewVersion := struct {
+ VersionID int64 `json:"version-id"`
+ TimestampMs int64 `json:"timestamp-ms"`
+ SchemaID int `json:"schema-id"`
+ Summary map[string]string `json:"summary"`
+ Representations []struct {
+ Type string `json:"type"`
+ SQL string `json:"sql"`
+ Dialect string `json:"dialect"`
+ } `json:"representations"`
+ DefaultCatalog string `json:"default-catalog"`
+ DefaultNamespace []string `json:"default-namespace"`
+ }{
+ VersionID: 1,
+ TimestampMs: time.Now().UnixMilli(),
+ SchemaID: schema.ID,
+ Summary: map[string]string{"sql": viewSQL},
+ Representations: []struct {
+ Type string `json:"type"`
+ SQL string `json:"sql"`
+ Dialect string `json:"dialect"`
+ }{
+ {Type: "sql", SQL: viewSQL, Dialect: "default"},
+ },
+ DefaultCatalog: c.name,
+ DefaultNamespace: nsIdent,
+ }
+
+ viewVersionBytes, err := json.Marshal(viewVersion)
+ if err != nil {
+ return fmt.Errorf("failed to marshal view version: %w", err)
+ }
+
+ if props == nil {
+ props = iceberg.Properties{}
+ }
+ props["view-version"] = string(viewVersionBytes)
+ props["view-format"] = "iceberg"
+ props["view-sql"] = viewSQL
+
+ schemaBytes, err := json.Marshal(schema)
+ if err != nil {
+ return fmt.Errorf("failed to marshal schema: %w", err)
+ }
+
+ // Create metadata location (even though we're not actually writing a
metadata file)
+ metadataLocation := fmt.Sprintf("virtual://%s/%s/%s.view.json", c.name,
ns, viewIdent)
Review Comment:
@zeroshade I'm not entirely sure what to put under metadaLocation so I'm
putting a dummy one. Please let me know if its okay
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