Initial commit

node_modules/knex/lib/dialects/oracle/utils.js

@@ -0,0 +1,106 @@
+class NameHelper {
+  constructor(oracleVersion) {
+    this.oracleVersion = oracleVersion;
+
+    // In oracle versions prior to 12.2, the maximum length for a database
+    // object name was 30 characters. 12.2 extended this to 128.
+    const versionParts = oracleVersion
+      .split('.')
+      .map((versionPart) => parseInt(versionPart));
+    if (
+      versionParts[0] > 12 ||
+      (versionParts[0] === 12 && versionParts[1] >= 2)
+    ) {
+      this.limit = 128;
+    } else {
+      this.limit = 30;
+    }
+  }
+
+  generateCombinedName(logger, postfix, name, subNames) {
+    const crypto = require('crypto');
+    if (!Array.isArray(subNames)) subNames = subNames ? [subNames] : [];
+    const table = name.replace(/\.|-/g, '_');
+    const subNamesPart = subNames.join('_');
+    let result = `${table}_${
+      subNamesPart.length ? subNamesPart + '_' : ''
+    }${postfix}`.toLowerCase();
+    if (result.length > this.limit) {
+      logger.warn(
+        `Automatically generated name "${result}" exceeds ${this.limit} character ` +
+          `limit for Oracle Database ${this.oracleVersion}. Using base64 encoded sha1 of that name instead.`
+      );
+      // generates the sha1 of the name and encode it with base64
+      result = crypto
+        .createHash('sha1')
+        .update(result)
+        .digest('base64')
+        .replace('=', '');
+    }
+    return result;
+  }
+}
+
+function wrapSqlWithCatch(sql, errorNumberToCatch) {
+  return (
+    `begin execute immediate '${sql.replace(/'/g, "''")}'; ` +
+    `exception when others then if sqlcode != ${errorNumberToCatch} then raise; ` +
+    `end if; ` +
+    `end;`
+  );
+}
+
+function ReturningHelper(columnName) {
+  this.columnName = columnName;
+}
+
+ReturningHelper.prototype.toString = function () {
+  return `[object ReturningHelper:${this.columnName}]`;
+};
+
+// If the error is any of these, we'll assume we need to
+// mark the connection as failed
+function isConnectionError(err) {
+  return [
+    'DPI-1010', // not connected
+    'DPI-1080', // connection was closed by ORA-%d
+    'ORA-03114', // not connected to ORACLE
+    'ORA-03113', // end-of-file on communication channel
+    'ORA-03135', // connection lost contact
+    'ORA-12514', // listener does not currently know of service requested in connect descriptor
+    'ORA-00022', // invalid session ID; access denied
+    'ORA-00028', // your session has been killed
+    'ORA-00031', // your session has been marked for kill
+    'ORA-00045', // your session has been terminated with no replay
+    'ORA-00378', // buffer pools cannot be created as specified
+    'ORA-00602', // internal programming exception
+    'ORA-00603', // ORACLE server session terminated by fatal error
+    'ORA-00609', // could not attach to incoming connection
+    'ORA-01012', // not logged on
+    'ORA-01041', // internal error. hostdef extension doesn't exist
+    'ORA-01043', // user side memory corruption
+    'ORA-01089', // immediate shutdown or close in progress
+    'ORA-01092', // ORACLE instance terminated. Disconnection forced
+    'ORA-02396', // exceeded maximum idle time, please connect again
+    'ORA-03122', // attempt to close ORACLE-side window on user side
+    'ORA-12153', // TNS'not connected
+    'ORA-12537', // TNS'connection closed
+    'ORA-12547', // TNS'lost contact
+    'ORA-12570', // TNS'packet reader failure
+    'ORA-12583', // TNS'no reader
+    'ORA-27146', // post/wait initialization failed
+    'ORA-28511', // lost RPC connection
+    'ORA-56600', // an illegal OCI function call was issued
+    'NJS-024',
+    'NJS-003',
+  ].some(function (prefix) {
+    return err.message.indexOf(prefix) === 0;
+  });
+}
+
+module.exports = {
+  NameHelper,
+  isConnectionError,
+  wrapSqlWithCatch,
+  ReturningHelper,
+};