1// Copyright 2015 TiDB Author. All Rights Reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package orm 16 17import ( 18 "fmt" 19 "strconv" 20 "strings" 21) 22 23// TiDBQueryBuilder is the SQL build 24type TiDBQueryBuilder struct { 25 Tokens []string 26} 27 28// Select will join the fields 29func (qb *TiDBQueryBuilder) Select(fields ...string) QueryBuilder { 30 qb.Tokens = append(qb.Tokens, "SELECT", strings.Join(fields, CommaSpace)) 31 return qb 32} 33 34// ForUpdate add the FOR UPDATE clause 35func (qb *TiDBQueryBuilder) ForUpdate() QueryBuilder { 36 qb.Tokens = append(qb.Tokens, "FOR UPDATE") 37 return qb 38} 39 40// From join the tables 41func (qb *TiDBQueryBuilder) From(tables ...string) QueryBuilder { 42 qb.Tokens = append(qb.Tokens, "FROM", strings.Join(tables, CommaSpace)) 43 return qb 44} 45 46// InnerJoin INNER JOIN the table 47func (qb *TiDBQueryBuilder) InnerJoin(table string) QueryBuilder { 48 qb.Tokens = append(qb.Tokens, "INNER JOIN", table) 49 return qb 50} 51 52// LeftJoin LEFT JOIN the table 53func (qb *TiDBQueryBuilder) LeftJoin(table string) QueryBuilder { 54 qb.Tokens = append(qb.Tokens, "LEFT JOIN", table) 55 return qb 56} 57 58// RightJoin RIGHT JOIN the table 59func (qb *TiDBQueryBuilder) RightJoin(table string) QueryBuilder { 60 qb.Tokens = append(qb.Tokens, "RIGHT JOIN", table) 61 return qb 62} 63 64// On join with on cond 65func (qb *TiDBQueryBuilder) On(cond string) QueryBuilder { 66 qb.Tokens = append(qb.Tokens, "ON", cond) 67 return qb 68} 69 70// Where join the Where cond 71func (qb *TiDBQueryBuilder) Where(cond string) QueryBuilder { 72 qb.Tokens = append(qb.Tokens, "WHERE", cond) 73 return qb 74} 75 76// And join the and cond 77func (qb *TiDBQueryBuilder) And(cond string) QueryBuilder { 78 qb.Tokens = append(qb.Tokens, "AND", cond) 79 return qb 80} 81 82// Or join the or cond 83func (qb *TiDBQueryBuilder) Or(cond string) QueryBuilder { 84 qb.Tokens = append(qb.Tokens, "OR", cond) 85 return qb 86} 87 88// In join the IN (vals) 89func (qb *TiDBQueryBuilder) In(vals ...string) QueryBuilder { 90 qb.Tokens = append(qb.Tokens, "IN", "(", strings.Join(vals, CommaSpace), ")") 91 return qb 92} 93 94// OrderBy join the Order by fields 95func (qb *TiDBQueryBuilder) OrderBy(fields ...string) QueryBuilder { 96 qb.Tokens = append(qb.Tokens, "ORDER BY", strings.Join(fields, CommaSpace)) 97 return qb 98} 99 100// Asc join the asc 101func (qb *TiDBQueryBuilder) Asc() QueryBuilder { 102 qb.Tokens = append(qb.Tokens, "ASC") 103 return qb 104} 105 106// Desc join the desc 107func (qb *TiDBQueryBuilder) Desc() QueryBuilder { 108 qb.Tokens = append(qb.Tokens, "DESC") 109 return qb 110} 111 112// Limit join the limit num 113func (qb *TiDBQueryBuilder) Limit(limit int) QueryBuilder { 114 qb.Tokens = append(qb.Tokens, "LIMIT", strconv.Itoa(limit)) 115 return qb 116} 117 118// Offset join the offset num 119func (qb *TiDBQueryBuilder) Offset(offset int) QueryBuilder { 120 qb.Tokens = append(qb.Tokens, "OFFSET", strconv.Itoa(offset)) 121 return qb 122} 123 124// GroupBy join the Group by fields 125func (qb *TiDBQueryBuilder) GroupBy(fields ...string) QueryBuilder { 126 qb.Tokens = append(qb.Tokens, "GROUP BY", strings.Join(fields, CommaSpace)) 127 return qb 128} 129 130// Having join the Having cond 131func (qb *TiDBQueryBuilder) Having(cond string) QueryBuilder { 132 qb.Tokens = append(qb.Tokens, "HAVING", cond) 133 return qb 134} 135 136// Update join the update table 137func (qb *TiDBQueryBuilder) Update(tables ...string) QueryBuilder { 138 qb.Tokens = append(qb.Tokens, "UPDATE", strings.Join(tables, CommaSpace)) 139 return qb 140} 141 142// Set join the set kv 143func (qb *TiDBQueryBuilder) Set(kv ...string) QueryBuilder { 144 qb.Tokens = append(qb.Tokens, "SET", strings.Join(kv, CommaSpace)) 145 return qb 146} 147 148// Delete join the Delete tables 149func (qb *TiDBQueryBuilder) Delete(tables ...string) QueryBuilder { 150 qb.Tokens = append(qb.Tokens, "DELETE") 151 if len(tables) != 0 { 152 qb.Tokens = append(qb.Tokens, strings.Join(tables, CommaSpace)) 153 } 154 return qb 155} 156 157// InsertInto join the insert SQL 158func (qb *TiDBQueryBuilder) InsertInto(table string, fields ...string) QueryBuilder { 159 qb.Tokens = append(qb.Tokens, "INSERT INTO", table) 160 if len(fields) != 0 { 161 fieldsStr := strings.Join(fields, CommaSpace) 162 qb.Tokens = append(qb.Tokens, "(", fieldsStr, ")") 163 } 164 return qb 165} 166 167// Values join the Values(vals) 168func (qb *TiDBQueryBuilder) Values(vals ...string) QueryBuilder { 169 valsStr := strings.Join(vals, CommaSpace) 170 qb.Tokens = append(qb.Tokens, "VALUES", "(", valsStr, ")") 171 return qb 172} 173 174// Subquery join the sub as alias 175func (qb *TiDBQueryBuilder) Subquery(sub string, alias string) string { 176 return fmt.Sprintf("(%s) AS %s", sub, alias) 177} 178 179// String join all Tokens 180func (qb *TiDBQueryBuilder) String() string { 181 return strings.Join(qb.Tokens, " ") 182} 183