knex/lib/dialects/mysql/schema/compiler.js
Tim Griesser f9aab9dc76 Major internal refactor
Beefed up transaction implementation, still needs tests
and cleanup of nested transaction queues.

Left todo:
- Fix commented out tests
- Fix oracle driver's transactions
2015-04-22 10:34:14 -04:00

45 lines
1.2 KiB
JavaScript

'use strict';
// MySQL Schema Compiler
// -------
var inherits = require('inherits');
var SchemaCompiler = require('../../../schema/compiler');
var assign = require('lodash/object/assign');
function SchemaCompiler_MySQL(client, builder) {
SchemaCompiler.call(this, client, builder)
}
inherits(SchemaCompiler_MySQL, SchemaCompiler)
assign(SchemaCompiler_MySQL.prototype, {
// Rename a table on the schema.
renameTable: function(tableName, to) {
this.pushQuery('rename table ' + this.formatter.wrap(tableName) + ' to ' + this.formatter.wrap(to));
},
// Check whether a table exists on the query.
hasTable: function(tableName) {
this.pushQuery({
sql: 'show tables like ' + this.formatter.parameter(tableName),
output: function(resp) {
return resp.length > 0;
}
});
},
// Check whether a column exists on the schema.
hasColumn: function(tableName, column) {
this.pushQuery({
sql: 'show columns from ' + this.formatter.wrap(tableName) +
' like ' + this.formatter.parameter(column),
output: function(resp) {
return resp.length > 0;
}
});
}
})
module.exports = SchemaCompiler_MySQL;