Initial commit

node_modules/knex/lib/dialects/mysql/schema/mysql-compiler.js

@@ -0,0 +1,60 @@
+// MySQL Schema Compiler
+// -------
+const SchemaCompiler = require('../../../schema/compiler');
+
+class SchemaCompiler_MySQL extends SchemaCompiler {
+  constructor(client, builder) {
+    super(client, builder);
+  }
+
+  // Rename a table on the schema.
+  renameTable(tableName, to) {
+    this.pushQuery(
+      `rename table ${this.formatter.wrap(tableName)} to ${this.formatter.wrap(
+        to
+      )}`
+    );
+  }
+
+  renameView(from, to) {
+    this.renameTable(from, to);
+  }
+
+  // Check whether a table exists on the query.
+  hasTable(tableName) {
+    let sql = 'select * from information_schema.tables where table_name = ?';
+    const bindings = [tableName];
+
+    if (this.schema) {
+      sql += ' and table_schema = ?';
+      bindings.push(this.schema);
+    } else {
+      sql += ' and table_schema = database()';
+    }
+
+    this.pushQuery({
+      sql,
+      bindings,
+      output: function output(resp) {
+        return resp.length > 0;
+      },
+    });
+  }
+
+  // Check whether a column exists on the schema.
+  hasColumn(tableName, column) {
+    this.pushQuery({
+      sql: `show columns from ${this.formatter.wrap(tableName)}`,
+      output(resp) {
+        return resp.some((row) => {
+          return (
+            this.client.wrapIdentifier(row.Field.toLowerCase()) ===
+            this.client.wrapIdentifier(column.toLowerCase())
+          );
+        });
+      },
+    });
+  }
+}
+
+module.exports = SchemaCompiler_MySQL;