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README.md

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@@ -10,60 +10,64 @@ Non-blocking PostgreSQL client for node.js. Pure JavaScript and native libpq bi
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### Simple, using built-in client pool
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var pg = require('pg');
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//or native libpq bindings
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//var pg = require('pg').native
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var conString = "tcp://postgres:1234@localhost/postgres";
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//error handling omitted
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pg.connect(conString, function(err, client) {
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client.query("SELECT NOW() as when", function(err, result) {
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console.log("Row count: %d",result.rows.length); // 1
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console.log("Current year: %d", result.rows[0].when.getYear());
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});
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});
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```javascript
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var pg = require('pg');
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//or native libpq bindings
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//var pg = require('pg').native
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var conString = "tcp://postgres:1234@localhost/postgres";
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//error handling omitted
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pg.connect(conString, function(err, client) {
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client.query("SELECT NOW() as when", function(err, result) {
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console.log("Row count: %d",result.rows.length); // 1
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console.log("Current year: %d", result.rows[0].when.getYear());
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});
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});
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```
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### Evented api
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var pg = require('pg'); //native libpq bindings = `var pg = require('pg').native`
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var conString = "tcp://postgres:1234@localhost/postgres";
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var client = new pg.Client(conString);
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client.connect();
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//queries are queued and executed one after another once the connection becomes available
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client.query("CREATE TEMP TABLE beatles(name varchar(10), height integer, birthday timestamptz)");
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client.query("INSERT INTO beatles(name, height, birthday) values($1, $2, $3)", ['Ringo', 67, new Date(1945, 11, 2)]);
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client.query("INSERT INTO beatles(name, height, birthday) values($1, $2, $3)", ['John', 68, new Date(1944, 10, 13)]);
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//queries can be executed either via text/parameter values passed as individual arguments
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//or by passing an options object containing text, (optional) parameter values, and (optional) query name
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client.query({
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name: 'insert beatle',
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text: "INSERT INTO beatles(name, height, birthday) values($1, $2, $3)",
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values: ['George', 70, new Date(1946, 02, 14)]
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});
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//subsequent queries with the same name will be executed without re-parsing the query plan by postgres
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client.query({
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name: 'insert beatle',
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values: ['Paul', 63, new Date(1945, 04, 03)]
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});
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var query = client.query("SELECT * FROM beatles WHERE name = $1", ['John']);
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//can stream row results back 1 at a time
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query.on('row', function(row) {
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console.log(row);
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console.log("Beatle name: %s", row.name); //Beatle name: John
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console.log("Beatle birth year: %d", row.birthday.getYear()); //dates are returned as javascript dates
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console.log("Beatle height: %d' %d\"", Math.floor(row.height/12), row.height%12); //integers are returned as javascript ints
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});
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//fired after last row is emitted
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query.on('end', function() {
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client.end();
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});
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```javascript
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var pg = require('pg'); //native libpq bindings = `var pg = require('pg').native`
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var conString = "tcp://postgres:1234@localhost/postgres";
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var client = new pg.Client(conString);
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client.connect();
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//queries are queued and executed one after another once the connection becomes available
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client.query("CREATE TEMP TABLE beatles(name varchar(10), height integer, birthday timestamptz)");
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client.query("INSERT INTO beatles(name, height, birthday) values($1, $2, $3)", ['Ringo', 67, new Date(1945, 11, 2)]);
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client.query("INSERT INTO beatles(name, height, birthday) values($1, $2, $3)", ['John', 68, new Date(1944, 10, 13)]);
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//queries can be executed either via text/parameter values passed as individual arguments
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//or by passing an options object containing text, (optional) parameter values, and (optional) query name
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client.query({
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name: 'insert beatle',
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text: "INSERT INTO beatles(name, height, birthday) values($1, $2, $3)",
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values: ['George', 70, new Date(1946, 02, 14)]
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});
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//subsequent queries with the same name will be executed without re-parsing the query plan by postgres
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client.query({
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name: 'insert beatle',
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values: ['Paul', 63, new Date(1945, 04, 03)]
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});
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var query = client.query("SELECT * FROM beatles WHERE name = $1", ['John']);
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//can stream row results back 1 at a time
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query.on('row', function(row) {
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console.log(row);
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console.log("Beatle name: %s", row.name); //Beatle name: John
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console.log("Beatle birth year: %d", row.birthday.getYear()); //dates are returned as javascript dates
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console.log("Beatle height: %d' %d\"", Math.floor(row.height/12), row.height%12); //integers are returned as javascript ints
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});
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//fired after last row is emitted
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query.on('end', function() {
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client.end();
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});
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```
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### Example notes
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@@ -164,6 +168,3 @@ Copyright (c) 2010 Brian Carlson ([email protected])
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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