snowflake-sdk
Version:
Node.js driver for Snowflake
33 lines • 1.53 kB
JavaScript
;
const resultContainsDuplicatedColumns = (rowtype) => {
const columnNames = rowtype.map((rt) => rt.name);
return columnNames.length !== new Set(columnNames).size;
};
function addOverriddenNamesForDuplicatedColumns(rowtype) {
//Prepare renamed columns for duplicates if row mode was set to 'object_with_renamed_duplicated_columns'
if (resultContainsDuplicatedColumns(rowtype)) {
const columnNames = new Set(rowtype.map((el) => el.name));
const quntityOfColumnNames = new Map();
for (let index = 0; index < rowtype.length; index++) {
const columnName = rowtype[index].name;
if (columnName) {
if (quntityOfColumnNames.has(columnName)) {
let times = quntityOfColumnNames.get(columnName) + 1;
let newColumnName = columnName + '_' + times;
while (columnNames.has(newColumnName)) {
times += 1;
newColumnName = columnName + '_' + times;
}
quntityOfColumnNames.set(columnName, times);
rowtype[index].overriddenName = newColumnName;
columnNames.add(newColumnName);
}
else {
quntityOfColumnNames.set(columnName, 1);
}
}
}
}
}
exports.addOverridenNamesForDuplicatedColumns = addOverriddenNamesForDuplicatedColumns;
//# sourceMappingURL=unique_column_name_creator.js.map