@devbro/sql-generator
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generic sql generator
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{"version":3,"sources":["../src/QueryGrammar.ts"],"sourcesContent":["import { Query } from './Query';\nimport {\n Parameter,\n CompiledSql,\n selectType,\n whereNull,\n whereOp,\n whereType,\n whereRaw,\n havingType,\n whereOpColumn,\n joinType,\n} from './types';\n\nfunction toUpperFirst(str: string) {\n return str.substring(0, 1).toUpperCase() + str.substring(1);\n}\nexport abstract class QueryGrammar {\n sqlParts: string[] = [\n 'select',\n 'table',\n 'join',\n 'where',\n 'groupBy',\n 'having',\n 'orderBy',\n 'limit',\n 'offset',\n ];\n\n toSql(query: Query): CompiledSql {\n let sql = '';\n let bindings: Parameter[] = [];\n\n for (const part of this.sqlParts) {\n // @ts-ignore\n const funcName: keyof this = 'compile' + toUpperFirst(part);\n // @ts-ignore\n const r = this[funcName](query.parts[part]);\n if (!sql) {\n sql = r.sql;\n } else if (r.sql) {\n sql += ' ' + r.sql;\n }\n bindings = [...bindings, ...r.bindings];\n }\n return { sql, bindings };\n }\n\n compileSelect(selects: selectType[]): CompiledSql {\n const rc = selects\n .map((v) => {\n return v;\n })\n .join(', ');\n\n return { sql: 'select ' + rc, bindings: [] };\n }\n\n compileTable(tableName: string): CompiledSql {\n let rc = '';\n if (tableName.length) {\n rc = 'from ' + tableName;\n }\n\n return { sql: rc, bindings: [] };\n }\n\n compileJoin(joins: joinType[]): CompiledSql {\n let sql = '';\n let bindings: Parameter[] = [];\n\n for (const j of joins) {\n sql += ' ' + j.type + ' join ' + j.table + ' on ';\n\n const where = this.compileWhere(j.conditions);\n if (where.sql.startsWith('where ')) {\n where.sql = where.sql.substring('where '.length);\n }\n\n sql += '(';\n sql += where.sql;\n sql += ')';\n\n bindings = [...bindings, ...where.bindings];\n }\n\n return { sql, bindings };\n }\n\n compileWhere(wheres: whereType[]): CompiledSql {\n let sql = '';\n let bindings: Parameter[] = [];\n\n for (const w of wheres) {\n sql += ' ' + w.joinCondition + ' ';\n if (w.negateCondition) {\n sql += 'not ';\n }\n const funcName = 'compileWhere' + toUpperFirst(w.type);\n // @ts-ignore\n const wh = this[funcName](w);\n sql += wh.sql;\n bindings = [...bindings, ...wh.bindings];\n }\n if (sql.startsWith(' and ')) {\n sql = 'where ' + sql.substring(' and '.length);\n } else if (sql.startsWith(' or ')) {\n sql = 'where ' + sql.substring(' or '.length);\n }\n return { sql, bindings };\n }\n\n compileWhereOperation(w: whereOp): CompiledSql {\n return {\n sql: `${w.column} ${w.operation} ${this.getVariablePlaceholder()}`,\n bindings: [w.value],\n };\n }\n\n compileWhereOperationColumn(w: whereOpColumn): CompiledSql {\n return {\n sql: `${w.column1} ${w.operation} ${w.column2}`,\n bindings: [],\n };\n }\n\n compileOrderBy(orderBy: string[]): CompiledSql {\n let rc = '';\n if (orderBy.length) {\n rc = 'order by ' + orderBy.join(', ');\n }\n\n return { sql: rc, bindings: [] };\n }\n\n compileLimit(limit: number | null): CompiledSql {\n let rc = '';\n if (limit !== null) {\n rc = 'limit ' + limit;\n }\n\n return { sql: rc, bindings: [] };\n }\n\n compileOffset(offset: number | null): CompiledSql {\n let rc = '';\n if (offset !== null) {\n rc = 'offset ' + offset;\n }\n\n return { sql: rc, bindings: [] };\n }\n\n abstract getVariablePlaceholder(): string;\n\n compileWhereNull(w: whereNull): CompiledSql {\n return {\n sql: `${w.column} is null`,\n bindings: [],\n };\n }\n\n compileInsert(query: Query, data: Record<string, Parameter>): CompiledSql {\n let sql = 'insert into ' + query.parts.table + ' (';\n const columns: string[] = [];\n const bindings: Parameter[] = [];\n const values: string[] = [];\n\n for (const [k, v] of Object.entries(data)) {\n columns.push(k);\n bindings.push(v);\n values.push(this.getVariablePlaceholder());\n }\n\n sql += columns.join(', ') + ') values (' + values + ')';\n\n return { sql, bindings };\n }\n\n abstract compileInsertGetId(\n query: Query,\n data: Record<string, Parameter>,\n options: { primaryKey: string[] }\n ): CompiledSql;\n\n compileUpdate(query: Query, data: Record<string, Parameter>): CompiledSql {\n let sql = 'update ' + query.parts.table + ' set ';\n const bindings: Parameter[] = [];\n\n const setParts = [];\n for (const [k, v] of Object.entries(data)) {\n setParts.push(`${k} = ${this.getVariablePlaceholder()}`);\n bindings.push(v);\n }\n\n sql += setParts.join(', ');\n\n const where_csql = this.compileWhere(query.parts.where);\n sql += ' ' + where_csql.sql;\n bindings.push(...where_csql.bindings);\n\n return { sql, bindings };\n }\n\n compileDelete(query: Query): CompiledSql {\n let sql = 'delete from ' + query.parts.table;\n const where_csql = this.compileWhere(query.parts.where);\n sql += ' ' + where_csql.sql;\n return { sql, bindings: where_csql.bindings };\n }\n\n compileUpsert(\n query: Query,\n data: Record<string, Parameter>,\n conflictFields: string[],\n updateFields: string[]\n ): CompiledSql {\n let sql = 'insert into ' + query.parts.table + ' (';\n const columns: string[] = [];\n const bindings: Parameter[] = [];\n const values: string[] = [];\n\n for (const [k, v] of Object.entries(data)) {\n columns.push(k);\n bindings.push(v);\n values.push(this.getVariablePlaceholder());\n }\n\n sql += columns.join(', ') + ') values (' + values + ')';\n\n sql += ' on conflict (' + conflictFields.join(', ') + ') do update set ';\n const setParts = [];\n for (const f of updateFields) {\n setParts.push(`${f} = excluded.${f}`);\n }\n sql += setParts.join(', ');\n\n const where_csql = this.compileWhere(query.parts.where);\n sql += ' ' + where_csql.sql;\n bindings.push(...where_csql.bindings);\n\n return { sql, bindings };\n }\n\n compileGroupBy(groupBy: string[]): CompiledSql {\n let rc = '';\n if (groupBy.length) {\n rc = 'group by ' + groupBy.join(', ');\n }\n\n return { sql: rc, bindings: [] };\n }\n\n compileHaving(having: havingType[]): CompiledSql {\n let sql = '';\n let bindings: Parameter[] = [];\n\n for (const w of having) {\n sql += ' ' + w.joinCondition + ' ';\n if (w.negateCondition) {\n sql += 'not ';\n }\n const funcName = 'compileHaving' + toUpperFirst(w.type);\n // @ts-ignore\n const wh = this[funcName](w);\n sql += wh.sql;\n bindings = [...bindings, ...wh.bindings];\n }\n if (sql.startsWith(' and ')) {\n sql = 'having ' + sql.substring(' and '.length);\n } else if (sql.startsWith(' or ')) {\n sql = 'having ' + sql.substring(' or '.length);\n }\n return { sql, bindings };\n }\n\n compileHavingOperation(w: whereOp): CompiledSql {\n return {\n sql: `${w.column} ${w.operation} ${this.getVariablePlaceholder()}`,\n bindings: [w.value],\n };\n }\n\n compileHavingRaw(w: whereRaw): CompiledSql {\n return {\n sql: w.sql,\n bindings: w.bindings,\n };\n 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