74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
// Copyright © 2016 Abcum Ltd
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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 sql
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func (p *parser) parseUseStatement() (stmt *UseStatement, err error) {
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stmt = &UseStatement{}
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var tok Token
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var exi bool
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tok, _, err = p.shouldBe(NAMESPACE, NS, DATABASE, DB)
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if err != nil {
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return nil, err
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}
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for {
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var val *Ident
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if p.is(tok, NAMESPACE, NS) {
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if val, err = p.parseIdent(); err != nil {
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return nil, err
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}
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stmt.NS = val.ID
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if err = p.o.ns(stmt.NS); err != nil {
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return nil, err
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}
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}
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if p.is(tok, DATABASE, DB) {
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if val, err = p.parseIdent(); err != nil {
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return nil, err
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}
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stmt.DB = val.ID
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if err = p.o.db(stmt.DB); err != nil {
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return nil, err
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}
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}
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tok, _, exi = p.mightBe(NAMESPACE, NS, DATABASE, DB)
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if !exi {
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break
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}
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}
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if _, _, err = p.shouldBe(EOF, SEMICOLON); err != nil {
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return nil, err
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}
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return
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}
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