wehub-resource-sync
137 lines
4.1 KiB
Go
137 lines
4.1 KiB
Go
// Copyright 2023 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ast
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import (
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"regexp"
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"strings"
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"github.com/cockroachdb/errors"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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"github.com/sirupsen/logrus"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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)
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// nodeCreateDatabase handles *tree.CreateDatabase nodes.
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func nodeCreateDatabase(_ *Context, node *tree.CreateDatabase) (*vitess.DBDDL, error) {
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var charsets []*vitess.CharsetAndCollate
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if len(node.Template) > 0 {
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// TODO: special casing "template0", as some tests make use of it and we need them to pass for now
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if node.Template != "template0" {
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return nil, errors.Errorf("TEMPLATE clause is not yet supported")
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}
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}
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if len(node.Encoding) > 0 {
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logrus.Warnf("unsupported clause ENCODING, ignoring")
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}
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if len(node.Strategy) > 0 {
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return nil, errors.Errorf("STRATEGY clause is not yet supported")
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}
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if len(node.Locale) > 0 {
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logrus.Warnf("unsupported clause LC_LOCALE, ignoring")
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}
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if len(node.Collate) > 0 {
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collation, charset, err := parseLocaleString(node.Collate)
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if err != nil {
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return nil, err
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}
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if collation == "" {
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logrus.Warnf("unsupported LC_COLLATE, ignoring")
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} else {
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charsets = append(charsets,
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&vitess.CharsetAndCollate{
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Type: "CHARACTER SET",
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Value: charset,
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},
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&vitess.CharsetAndCollate{
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Type: "COLLATE",
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Value: collation,
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},
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)
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}
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}
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if len(node.CType) > 0 {
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logrus.Warnf("CTYPE clause is not yet supported, ignoring")
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}
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if len(node.IcuLocale) > 0 {
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return nil, errors.Errorf("ICU_LOCALE clause is not yet supported")
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}
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if len(node.IcuRules) > 0 {
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return nil, errors.Errorf("TEMPLATE clause is not yet supported")
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}
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if len(node.LocaleProvider) > 0 {
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return nil, errors.Errorf("LOCALE_PROVIDER clause is not yet supported")
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}
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if len(node.CollationVersion) > 0 {
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return nil, errors.Errorf("COLLATION_VERSION clause is not yet supported")
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}
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if len(node.Tablespace) > 0 {
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return nil, errors.Errorf("TABLESPACE clause is not yet supported")
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}
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// TODO: some clauses have default values in case of not being defined.
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// ALLOW_CONNECTIONS defaults to TRUE
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if node.AllowConnections != nil {
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return nil, errors.Errorf("ALLOW_CONNECTIONS clause is not yet supported")
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}
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// CONNECTION LIMIT defaults to -1
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if node.ConnectionLimit != nil {
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return nil, errors.Errorf("CONNECTION LIMIT clause is not yet supported")
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}
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// IS_TEMPLATE defaults to FALSE
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if node.IsTemplate != nil {
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return nil, errors.Errorf("IS_TEMPLATE clause is not yet supported")
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}
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if node.Oid != nil {
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return nil, errors.Errorf("OID clause is not yet supported")
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}
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return &vitess.DBDDL{
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Action: vitess.CreateStr,
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SchemaOrDatabase: "database",
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DBName: bareIdentifier(node.Name),
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IfNotExists: node.IfNotExists,
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CharsetCollate: charsets,
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}, nil
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}
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var collationRegex = regexp.MustCompile(`^(?P<Language>[^_]+)_?(?P<Region>[^.]+)?\.?(?P<CodePage>\d+)?$`)
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// parseLocaleString attempts to parse the locale string given to extract a mysql collation we can use
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func parseLocaleString(collation string) (string, string, error) {
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// FindStringSubmatchIndex returns the indices of the matched elements
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match := collationRegex.FindStringSubmatch(collation)
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result := make(map[string]string)
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for i, name := range collationRegex.SubexpNames() {
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if i > 0 && i <= len(match) {
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result[name] = match[i]
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}
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}
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if result["Language"] == "" {
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return "", "", errors.Errorf("malformed collation: %s", collation)
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}
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switch strings.ToLower(result["Language"]) {
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case "english", "en":
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return "latin1_general_cs", "latin1", nil
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}
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return "", "", nil
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}
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