Javier Goizueta
7902b276ad
Fixes #420 Keep table schema of overviews base tables and use it to support queries that use the schema name when not strictly needed.
49 lines
1.7 KiB
JavaScript
49 lines
1.7 KiB
JavaScript
function OverviewsMetadataApi(pgQueryRunner) {
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this.pgQueryRunner = pgQueryRunner;
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}
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module.exports = OverviewsMetadataApi;
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// TODO: share this with QueryTablesApi? ... or maintain independence?
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var affectedTableRegexCache = {
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bbox: /!bbox!/g,
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scale_denominator: /!scale_denominator!/g,
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pixel_width: /!pixel_width!/g,
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pixel_height: /!pixel_height!/g
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};
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function prepareSql(sql) {
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return sql
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.replace(affectedTableRegexCache.bbox, 'ST_MakeEnvelope(0,0,0,0)')
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.replace(affectedTableRegexCache.scale_denominator, '0')
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.replace(affectedTableRegexCache.pixel_width, '1')
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.replace(affectedTableRegexCache.pixel_height, '1')
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;
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}
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OverviewsMetadataApi.prototype.getOverviewsMetadata = function (username, sql, callback) {
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// FIXME: Currently using internal function parsed_table
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// CDB_Overviews should provide the schema information directly.
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var query = 'SELECT *, _cdb_schema_name(base_table)' +
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' FROM CDB_Overviews(CDB_QueryTablesText($windshaft$' + prepareSql(sql) + '$windshaft$))';
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this.pgQueryRunner.run(username, query, function handleOverviewsRows(err, rows) {
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if (err){
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callback(err);
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return;
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}
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var metadata = {};
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rows.forEach(function(row) {
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var table = row.base_table;
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var schema = row._cdb_schema_name;
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var table_metadata = metadata[table];
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if ( !table_metadata ) {
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table_metadata = metadata[table] = {};
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}
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table_metadata[row.z] = { table: row.overview_table };
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table_metadata.schema = schema;
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});
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return callback(null, metadata);
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});
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};
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