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FastLoadBatch.ts
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FastLoadBatch.ts
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// Copyright 2023 by Teradata Corporation. All rights reserved.
// This sample program demonstrates how to FastLoad batches of rows.
// @ts-ignore
import { TeradataConnection, TeradataCursor } from "teradatasql";
type Rows = any[];
const con: TeradataConnection = new TeradataConnection();
con.connect({ host: "whomooz", user: "guest", password: "please" });
const cur: TeradataCursor = con.cursor();
const sTableName: string = "FastLoadBatch";
let sRequest: string = "DROP TABLE " + sTableName;
console.log(sRequest);
cur.execute(sRequest, undefined, 3807); // ignoreErrors = 3807
sRequest = "CREATE TABLE " + sTableName + " (c1 INTEGER NOT NULL, c2 VARCHAR(10))";
console.log(sRequest);
cur.execute(sRequest);
try {
console.log("con.autocommit = false");
con.autocommit = false;
try {
let aaoValues: any[] = [
[
1, // c1 INTEGER NOT NULL
null, // c2 VARCHAR
],
[
2, // c1 INTEGER NOT NULL
"abc", // c2 VARCHAR
],
[
3, // c1 INTEGER NOT NULL
"def", // c2 VARCHAR
],
];
const sInsert: string = "{fn teradata_try_fastload}INSERT INTO " + sTableName + " (?, ?)";
console.log(sInsert);
cur.execute(sInsert, aaoValues);
// obtain the warnings and errors for transmitting the data to the database -- the acquisition phase
sRequest = "{fn teradata_nativesql}{fn teradata_get_warnings}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
let rows: Rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
sRequest = "{fn teradata_nativesql}{fn teradata_get_errors}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
sRequest = "{fn teradata_nativesql}{fn teradata_logon_sequence_number}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
aaoValues = [
[
4, // c1 INTEGER NOT NULL
"mno", // c2 VARCHAR
],
[
5, // c1 INTEGER NOT NULL
null, // c2 VARCHAR
],
[
6, // c1 INTEGER NOT NULL
"pqr", // c2 VARCHAR
],
];
console.log(sInsert);
cur.execute(sInsert, aaoValues);
// obtain the warnings and errors for transmitting the data to the database -- the acquisition phase
sRequest = "{fn teradata_nativesql}{fn teradata_get_warnings}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
sRequest = "{fn teradata_nativesql}{fn teradata_get_errors}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
aaoValues = [
[
7, // c1 INTEGER NOT NULL
"uvw", // c2 VARCHAR
],
[
8, // c1 INTEGER NOT NULL
"xyz", // c2 VARCHAR
],
[
9, // c1 INTEGER NOT NULL
null, // c2 VARCHAR
],
];
console.log(sInsert);
cur.execute(sInsert, aaoValues);
// obtain the warnings and errors for transmitting the data to the database -- the acquisition phase
sRequest = "{fn teradata_nativesql}{fn teradata_get_warnings}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
sRequest = "{fn teradata_nativesql}{fn teradata_get_errors}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
console.log("con.commit()");
con.commit();
// obtain the warnings and errors for the apply phase
sRequest = "{fn teradata_nativesql}{fn teradata_get_warnings}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
sRequest = "{fn teradata_nativesql}{fn teradata_get_errors}" + sInsert;
console.log(sRequest);
cur.execute(sRequest);
rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
} finally {
console.log("con.autocommit = true");
con.autocommit = true;
}
sRequest = "SELECT * FROM " + sTableName + " ORDER BY 1";
console.log(sRequest);
cur.execute(sRequest);
const rows: Rows = cur.fetchall();
for (const row of rows) {
console.log(row);
}
} finally {
sRequest = "DROP TABLE " + sTableName;
console.log(sRequest);
cur.execute(sRequest);
}
cur.close();
con.close();