SQL (Node)

function processSQLFile(fileName) {

  // Extract SQL queries from files. Assumes no ';' in the fileNames
  var queries = fs.readFileSync(fileName).toString()
    .replace(/(\r\n|\n|\r)/gm," ") // remove newlines
    .replace(/\s+/g, ' ') // excess white space
    .split(";") // split into all statements
    .map(Function.prototype.call, String.prototype.trim)
    .filter(function(el) {return el.length != 0}); // remove any empty ones

  // Execute each SQL query sequentially
  queries.forEach(function(query) {
    batch.push(function(done) {
      if (query.indexOf("COPY") === 0) { // COPY - needs special treatment
        var regexp = /COPY\ (.*)\ FROM\ (.*)\ DELIMITERS/gmi;
        var matches = regexp.exec(query);
        var table = matches[1];
        var fileName = matches[2];
        var copyString = "COPY " + table + " FROM STDIN DELIMITERS ',' CSV HEADER";
        var stream = client.copyFrom(copyString);
        stream.on('close', function () {
          done();
        });
        var csvFile = __dirname + '/' + fileName;
        var str = fs.readFileSync(csvFile);
        stream.write(str);
        stream.end();
      } else { // Other queries don't need special treatment
        client.query(query, function(result) {
          done();
        });
      }
    });
  });
}

Similiar Collections

Python strftime reference pandas.Period.strftime python - Formatting Quarter time in pandas columns - Stack Overflow python - Pandas: Change day - Stack Overflow python - Check if multiple columns exist in a df - Stack Overflow Pandas DataFrame apply() - sending arguments examples python - How to filter a dataframe of dates by a particular month/day? - Stack Overflow python - replace a value in the entire pandas data frame - Stack Overflow python - Replacing blank values (white space) with NaN in pandas - Stack Overflow python - get list from pandas dataframe column - Stack Overflow python - How to drop rows of Pandas DataFrame whose value in a certain column is NaN - Stack Overflow python - How to drop rows of Pandas DataFrame whose value in a certain column is NaN - Stack Overflow python - How to lowercase a pandas dataframe string column if it has missing values? - Stack Overflow How to Convert Integers to Strings in Pandas DataFrame - Data to Fish How to Convert Integers to Strings in Pandas DataFrame - Data to Fish create a dictionary of two pandas Dataframe columns? - Stack Overflow python - ValueError: No axis named node2 for object type <class 'pandas.core.frame.DataFrame'> - Stack Overflow Python Pandas iterate over rows and access column names - Stack Overflow python - Creating dataframe from a dictionary where entries have different lengths - Stack Overflow python - Deleting DataFrame row in Pandas based on column value - Stack Overflow python - How to check if a column exists in Pandas - Stack Overflow python - Import pandas dataframe column as string not int - Stack Overflow python - What is the most efficient way to create a dictionary of two pandas Dataframe columns? - Stack Overflow Python Loop through Excel sheets, place into one df - Stack Overflow python - How do I get the row count of a Pandas DataFrame? - Stack Overflow python - How to save a new sheet in an existing excel file, using Pandas? - Stack Overflow Python Loop through Excel sheets, place into one df - Stack Overflow How do I select a subset of a DataFrame? — pandas 1.2.4 documentation python - Delete column from pandas DataFrame - Stack Overflow