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/* eslint-disable security/detect-object-injection */
import { LRUStorage } from '../../caching/lru-storage.js';
import { checkFieldAutoincrement } from '../../helpers/check-field-autoincrement.js';
import { DAO_CONSTANTS } from '../../helpers/data-access-objects-constants.js';
import { getPropertyValueByDescriptor } from '../../helpers/get-property-value-by-descriptor.js';
import { setPropertyValue } from '../../helpers/set-property-value.js';
import { AutocompleteFieldsDS } from '../shared/data-structures/autocomplete-fields.ds.js';
import { ConnectionParams } from '../shared/data-structures/connections-params.ds.js';
import { FilteringFieldsDS } from '../shared/data-structures/filtering-fields.ds.js';
import { ForeignKeyDS } from '../shared/data-structures/foreign-key.ds.js';
import { FoundRowsDS } from '../shared/data-structures/found-rows.ds.js';
import { PrimaryKeyDS } from '../shared/data-structures/primary-key.ds.js';
import { ReferencedTableNamesAndColumnsDS } from '../shared/data-structures/referenced-table-names-columns.ds.js';
import { TableSettingsDS } from '../shared/data-structures/table-settings.ds.js';
import { TableStructureDS } from '../shared/data-structures/table-structure.ds.js';
import { TestConnectionResultDS } from '../shared/data-structures/test-result-connection.ds.js';
import { ValidateTableSettingsDS } from '../shared/data-structures/validate-table-settings.ds.js';
import { FilterCriteriaEnum } from '../shared/enums/filter-criteria.enum.js';
import { IDataAccessObject } from '../shared/interfaces/data-access-object.interface.js';
import { BasicDataAccessObject } from './basic-data-access-object.js';
import { objectKeysToLowercase } from '../../helpers/object-kyes-to-lowercase.js';
import { Knex } from 'knex';
import { renameObjectKeyName } from '../../helpers/rename-object-keyname.js';
import { getNumbersFromString } from '../../helpers/get-numbers-from-string.js';
import { tableSettingsFieldValidator } from '../../helpers/validation/table-settings-validator.js';
import { TableDS } from '../shared/data-structures/table.ds.js';
import { ERROR_MESSAGES } from '../../helpers/errors/error-messages.js';
import { Stream, Readable } from 'node:stream';
import * as csv from 'csv';
import { isMySqlDateOrTimeType, isMySQLDateStringByRegexp } from '../../helpers/is-database-date.js';
import { nanoid } from 'nanoid';
export class DataAccessObjectMysql extends BasicDataAccessObject implements IDataAccessObject {
constructor(connection: ConnectionParams) {
super(connection);
}
public async addRowInTable(
tableName: string,
row: Record<string, unknown>,
): Promise<number | Record<string, unknown>> {
const [tableStructure, primaryColumns] = await Promise.all([
this.getTableStructure(tableName),
this.getTablePrimaryColumns(tableName),
]);
const jsonColumnNames = tableStructure.reduce((acc, structEl) => {
if (structEl.data_type.toLowerCase() === 'json') {
acc.add(structEl.column_name);
}
return acc;
}, new Set<string>());
for (const key in row) {
if (jsonColumnNames.has(key)) {
setPropertyValue(row, key, JSON.stringify(getPropertyValueByDescriptor(row, key)));
}
}
let autoIncrementPrimaryKey = null;
for (const el of primaryColumns) {
const primaryKeyInStructure = tableStructure.find((structureEl) => structureEl.column_name === el.column_name);
if (
primaryKeyInStructure &&
checkFieldAutoincrement(primaryKeyInStructure.column_default, primaryKeyInStructure.extra)
) {
autoIncrementPrimaryKey = primaryKeyInStructure;
break;
}
}
const knex = await this.configureKnex();
await knex.raw('SET SQL_SAFE_UPDATES = 1;');
if (primaryColumns?.length > 0) {
const primaryKeys = primaryColumns.map((column) => column.column_name);
try {
await knex(tableName).insert(row);
if (!autoIncrementPrimaryKey) {
const resultsArray = primaryKeys.map((key) => [key, row[key]]);
return Object.fromEntries(resultsArray);
} else {
const lastInsertId = await knex(tableName).select(knex.raw(`LAST_INSERT_ID()`));
const resultObj = primaryColumns.reduce((obj, el, index) => {
obj[el.column_name] = lastInsertId[index]['LAST_INSERT_ID()'];
return obj;
}, {});
return resultObj;
}
} catch (e) {
throw new Error(e);
}
} else {
try {
await knex(tableName).insert(row).returning(Object.keys(row));
} catch (error) {
throw new Error(error);
}
}
}
public async deleteRowInTable(
tableName: string,
primaryKey: Record<string, unknown>,
): Promise<Record<string, unknown>> {
const knex = await this.configureKnex();
await knex.raw('SET SQL_SAFE_UPDATES = 1;');
return await knex(tableName).returning(Object.keys(primaryKey)).where(primaryKey).del();
}
public async getIdentityColumns(
tableName: string,
referencedFieldName: string,
identityColumnName: string,
fieldValues: (string | number)[],
): Promise<Array<Record<string, unknown>>> {
const knex = await this.configureKnex();
const columnsToSelect = identityColumnName ? [referencedFieldName, identityColumnName] : [referencedFieldName];
return await knex(tableName).select(columnsToSelect).whereIn(referencedFieldName, fieldValues);
}
public async getRowByPrimaryKey(
tableName: string,
primaryKey: Record<string, unknown>,
tableSettings: TableSettingsDS,
): Promise<Record<string, unknown>> {
const knex: Knex<any, any[]> = await this.configureKnex();
let availableFields: string[] = [];
if (tableSettings) {
const tableStructure = await this.getTableStructure(tableName);
availableFields = this.findAvailableFields(tableSettings, tableStructure);
}
const result = await knex(tableName)
.select(availableFields.length ? availableFields : '*')
.where(primaryKey);
return result[0] as unknown as Record<string, unknown>;
}
public async bulkGetRowsFromTableByPrimaryKeys(
tableName: string,
primaryKeys: Array<Record<string, unknown>>,
settings: TableSettingsDS,
): Promise<Array<Record<string, unknown>>> {
const knex = await this.configureKnex();
let availableFields: string[] = [];
if (settings) {
const tableStructure = await this.getTableStructure(tableName);
availableFields = this.findAvailableFields(settings, tableStructure);
}
const query = knex(tableName).select(availableFields.length ? availableFields : '*');
primaryKeys.forEach((primaryKey) => {
query.orWhere((builder) => {
Object.entries(primaryKey).forEach(([column, value]) => {
builder.andWhere(column, value);
});
});
});
const results = await query;
return results as Array<Record<string, unknown>>;
}
public async getRowsFromTable(
tableName: string,
settings: TableSettingsDS,
page: number,
perPage: number,
searchedFieldValue: string,
filteringFields: FilteringFieldsDS[],
autocompleteFields: AutocompleteFieldsDS,
): Promise<FoundRowsDS> {
page = page > 0 ? page : DAO_CONSTANTS.DEFAULT_PAGINATION.page;
perPage =
perPage > 0
? perPage
: settings.list_per_page > 0
? settings.list_per_page
: DAO_CONSTANTS.DEFAULT_PAGINATION.perPage;
const knex = await this.configureKnex();
const tableStructure = await this.getTableStructure(tableName);
const availableFields = this.findAvailableFields(settings, tableStructure);
if (autocompleteFields?.value && autocompleteFields?.fields?.length > 0) {
const { fields, value } = autocompleteFields;
const rows = await knex(tableName)
.select(fields)
.modify((builder) => {
if (value !== '*') {
fields.forEach((field) => {
builder.orWhere(field, 'like', `${value}%`);
});
} else {
return builder;
}
})
.limit(DAO_CONSTANTS.AUTOCOMPLETE_ROW_LIMIT);
const { large_dataset } = await this.getRowsCount(knex, null, tableName, this.connection.database);
const rowsRO = {
data: rows,
pagination: {} as any,
large_dataset,
};
return rowsRO;
}
const fastRowsCount = await this.getFastRowsCount(knex, tableName, this.connection.database);
const countRowsQB = knex(tableName)
.modify((builder) => {
let { search_fields } = settings;
if (!search_fields?.length && searchedFieldValue) {
search_fields = availableFields;
}
if (search_fields?.length && searchedFieldValue) {
for (const field of search_fields) {
if (Buffer.isBuffer(searchedFieldValue)) {
builder.orWhere(field, '=', searchedFieldValue);
} else {
if (fastRowsCount <= 1000) {
builder.orWhereRaw(` CAST(?? AS CHAR) LIKE ?`, [field, `%${searchedFieldValue.toLowerCase()}%`]);
} else {
builder.orWhereRaw(` CAST(?? AS CHAR) LIKE ?`, [field, `${searchedFieldValue.toLowerCase()}%`]);
}
}
}
}
return builder;
})
.modify((builder) => {
if (filteringFields && filteringFields?.length) {
for (const filterObject of filteringFields) {
const { field, criteria, value } = filterObject;
const operators = {
[FilterCriteriaEnum.eq]: '=',
[FilterCriteriaEnum.startswith]: 'like',
[FilterCriteriaEnum.endswith]: 'like',
[FilterCriteriaEnum.gt]: '>',
[FilterCriteriaEnum.lt]: '<',
[FilterCriteriaEnum.lte]: '<=',
[FilterCriteriaEnum.gte]: '>=',
[FilterCriteriaEnum.contains]: 'like',
[FilterCriteriaEnum.icontains]: 'not like',
[FilterCriteriaEnum.empty]: 'is',
};
const values = {
[FilterCriteriaEnum.startswith]: `${value}%`,
[FilterCriteriaEnum.endswith]: `%${value}`,
[FilterCriteriaEnum.contains]: `%${value}%`,
[FilterCriteriaEnum.icontains]: `%${value}%`,
[FilterCriteriaEnum.empty]: null,
};
builder.where(field, operators[criteria], values[criteria] || value);
}
}
return builder;
});
const rowsResultQb = countRowsQB.clone();
const offset = (page - 1) * perPage;
const rows = await rowsResultQb
.select(availableFields)
.limit(perPage)
.offset(offset)
.modify((builder) => {
if (settings.ordering_field && settings.ordering) {
builder.orderBy(settings.ordering_field, settings.ordering);
}
return builder;
});
const { large_dataset, rowsCount } = await this.getRowsCount(
knex,
countRowsQB,
tableName,
this.connection.database,
);
const pagination = {
total: rowsCount,
lastPage: Math.ceil(rowsCount / perPage),
perPage,
currentPage: page,
};
const rowsRO = {
data: rows,
pagination,
large_dataset,
};
return rowsRO;
}
public async getTableForeignKeys(tableName: string): Promise<ForeignKeyDS[]> {
const cachedForeignKeys = LRUStorage.getTableForeignKeysCache(this.connection, tableName);
if (cachedForeignKeys) {
return cachedForeignKeys;
}
const { database } = this.connection;
const knex = await this.configureKnex();
const foreignKeys = await knex(tableName)
.select(
knex.raw(`COLUMN_NAME,CONSTRAINT_NAME,
REFERENCED_TABLE_NAME,
REFERENCED_COLUMN_NAME`),
)
.from(
knex.raw(
`INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE
TABLE_SCHEMA = ? AND
TABLE_NAME = ? AND REFERENCED_COLUMN_NAME IS NOT NULL;`,
[database, tableName],
),
);
const foreignKeysInLowercase = foreignKeys.map(objectKeysToLowercase) as ForeignKeyDS[];
LRUStorage.setTableForeignKeysCache(this.connection, tableName, foreignKeysInLowercase);
return foreignKeysInLowercase;
}
public async getTablePrimaryColumns(tableName: string): Promise<PrimaryKeyDS[]> {
const cachedPrimaryColumns = LRUStorage.getTablePrimaryKeysCache(this.connection, tableName);
if (cachedPrimaryColumns) {
return cachedPrimaryColumns;
}
const knex = await this.configureKnex();
const { database } = this.connection;
const primaryColumns = await knex(tableName)
.select('COLUMN_NAME', 'DATA_TYPE')
.from(knex.raw('information_schema.COLUMNS'))
.where(
knex.raw(
`TABLE_SCHEMA = ? AND
TABLE_NAME = ? AND
COLUMN_KEY = 'PRI'`,
[database, tableName],
),
);
const primaryColumnsInLowercase = primaryColumns.map(objectKeysToLowercase) as PrimaryKeyDS[];
LRUStorage.setTablePrimaryKeysCache(this.connection, tableName, primaryColumnsInLowercase);
return primaryColumnsInLowercase;
}
public async getTablesFromDB(): Promise<TableDS[]> {
const knex = await this.configureKnex();
const schema = this.connection.database;
const query = `
SELECT table_name, 'table' as type
FROM information_schema.tables
WHERE table_schema = ?
UNION
SELECT table_name, 'view' as type
FROM information_schema.views
WHERE table_schema = ?
`;
const [rows] = await knex.raw(query, [schema, schema]);
return rows.map(({ TABLE_NAME, table_name, type }: any) => ({
tableName: TABLE_NAME ?? table_name,
isView: type === 'view',
}));
}
public async getTableStructure(tableName: string): Promise<TableStructureDS[]> {
const cachedTableStructure = LRUStorage.getTableStructureCache(this.connection, tableName);
if (cachedTableStructure) {
return cachedTableStructure;
}
const knex = await this.configureKnex();
const { database } = this.connection;
const structureColumns = await knex('information_schema.columns')
.select(
'column_name',
'column_default',
'data_type',
'column_type',
'is_nullable',
'character_maximum_length',
'extra',
)
.orderBy('ordinal_position')
.where({
table_schema: database,
table_name: tableName,
});
const structureColumnsInLowercase = structureColumns.map(objectKeysToLowercase);
structureColumnsInLowercase.forEach((element) => {
element.is_nullable = element.is_nullable === 'YES';
renameObjectKeyName(element, 'is_nullable', 'allow_null');
switch (element.data_type) {
case 'enum':
element.data_type_params = element.column_type.slice(6, -2).split("','");
break;
case 'set':
element.data_type_params = element.column_type.slice(5, -2).split("','");
break;
}
element.character_maximum_length =
element.character_maximum_length ?? getNumbersFromString(element.column_type) ?? null;
});
LRUStorage.setTableStructureCache(this.connection, tableName, structureColumnsInLowercase as TableStructureDS[]);
return structureColumnsInLowercase as TableStructureDS[];
}
public async testConnect(): Promise<TestConnectionResultDS> {
if (!this.connection.id) {
this.connection.id = nanoid(6);
}
const knex = await this.configureKnex();
try {
await knex().select(1);
return {
result: true,
message: 'Successfully connected',
};
} catch (e) {
return {
result: false,
message: e.message || 'Connection failed',
};
} finally {
LRUStorage.delKnexCache(this.connection);
}
}
public async updateRowInTable(
tableName: string,
row: Record<string, unknown>,
primaryKey: Record<string, unknown>,
): Promise<Record<string, unknown>> {
const knex = await this.configureKnex();
await knex.raw('SET SQL_SAFE_UPDATES = 1;');
const tableStructure = await this.getTableStructure(tableName);
const jsonColumnNames = tableStructure
.filter(({ data_type }) => data_type.toLowerCase() === 'json')
.map(({ column_name }) => column_name);
Object.entries(row).forEach(([key, value]) => {
if (jsonColumnNames.includes(key)) {
row[key] = JSON.stringify(value);
}
});
return await knex(tableName).returning(Object.keys(primaryKey)).where(primaryKey).update(row);
}
public async bulkUpdateRowsInTable(
tableName: string,
newValues: Record<string, unknown>,
primaryKeys: Array<Record<string, unknown>>,
): Promise<Array<Record<string, unknown>>> {
const knex = await this.configureKnex();
await knex.raw('SET SQL_SAFE_UPDATES = 1;');
const tableStructure = await this.getTableStructure(tableName);
const jsonColumnNames = tableStructure
.filter(({ data_type }) => data_type.toLowerCase() === 'json')
.map(({ column_name }) => column_name);
Object.entries(newValues).forEach(([key, value]) => {
if (jsonColumnNames.includes(key)) {
newValues[key] = JSON.stringify(value);
}
});
return await knex.transaction(async (trx) => {
const results = [];
for (const primaryKey of primaryKeys) {
const result = await trx(tableName).returning(Object.keys(primaryKey)).where(primaryKey).update(newValues);
results.push(result[0]);
}
return results;
});
}
public async bulkDeleteRowsInTable(tableName: string, primaryKeys: Array<Record<string, unknown>>): Promise<number> {
const knex = await this.configureKnex();
if (primaryKeys.length === 0) {
return 0;
}
await knex.transaction(async (trx) => {
await trx(tableName)
.delete()
.modify((queryBuilder) => {
primaryKeys.forEach((key) => {
queryBuilder.orWhere((builder) => {
Object.entries(key).forEach(([column, value]) => {
builder.andWhere(column, value);
});
});
});
});
});
return primaryKeys.length;
}
public async validateSettings(settings: ValidateTableSettingsDS, tableName: string): Promise<string[]> {
const [tableStructure, primaryColumns] = await Promise.all([
this.getTableStructure(tableName),
this.getTablePrimaryColumns(tableName),
]);
return tableSettingsFieldValidator(tableStructure, primaryColumns, settings);
}
public async getReferencedTableNamesAndColumns(tableName: string): Promise<ReferencedTableNamesAndColumnsDS[]> {
const primaryColumns = await this.getTablePrimaryColumns(tableName);
const knex = await this.configureKnex();
const results: Array<ReferencedTableNamesAndColumnsDS> = [];
for (const primaryColumn of primaryColumns) {
const result = await knex.raw(
`
SELECT
TABLE_NAME as 'table_name',
COLUMN_NAME as 'column_name'
FROM
information_schema.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_NAME = ?
AND REFERENCED_COLUMN_NAME = ?
AND TABLE_SCHEMA = ?;
`,
[tableName, primaryColumn.column_name, this.connection.database],
);
let resultValue = result[0] || [];
resultValue = Array.isArray(resultValue) ? resultValue : [resultValue];
results.push({
referenced_on_column_name: primaryColumn.column_name,
referenced_by: resultValue,
});
}
return results;
}
public async isView(tableName: string): Promise<boolean> {
const knex = await this.configureKnex();
const result = await knex('information_schema.tables').select('table_type').where({
table_schema: this.connection.database,
table_name: tableName,
});
if (result.length === 0) {
throw new Error(ERROR_MESSAGES.TABLE_NOT_FOUND(tableName));
}
return result[0].table_type === 'VIEW';
}
public async getTableRowsStream(
tableName: string,
settings: TableSettingsDS,
page: number,
perPage: number,
searchedFieldValue: string,
filteringFields: Array<FilteringFieldsDS>,
): Promise<Stream & AsyncIterable<unknown>> {
page = page > 0 ? page : DAO_CONSTANTS.DEFAULT_PAGINATION.page;
perPage =
perPage > 0
? perPage
: settings.list_per_page > 0
? settings.list_per_page
: DAO_CONSTANTS.DEFAULT_PAGINATION.perPage;
const offset = (page - 1) * perPage;
const knex = await this.configureKnex();
// const [{ large_dataset }, tableStructure] = await Promise.all([
// this.getRowsCount(knex, null, tableName, this.connection.database),
// this.getTableStructure(tableName),
// ]);
const tableStructure = await this.getTableStructure(tableName);
// if (large_dataset) {
// throw new Error(ERROR_MESSAGES.DATA_IS_TO_LARGE);
// }
const availableFields = this.findAvailableFields(settings, tableStructure);
const rowsAsStream = knex(tableName)
.select(availableFields)
.modify((builder) => {
let { search_fields } = settings;
if ((!search_fields || search_fields?.length === 0) && searchedFieldValue) {
search_fields = availableFields;
}
if (search_fields && searchedFieldValue && search_fields.length > 0) {
for (const field of search_fields) {
if (Buffer.isBuffer(searchedFieldValue)) {
builder.orWhere(field, '=', searchedFieldValue);
} else {
builder.orWhereRaw(` CAST (?? AS CHAR (255))=?`, [field, searchedFieldValue]);
}
}
}
})
.modify((builder) => {
if (filteringFields && filteringFields.length > 0) {
for (const filterObject of filteringFields) {
const { field, criteria, value } = filterObject;
const operators = {
[FilterCriteriaEnum.eq]: '=',
[FilterCriteriaEnum.startswith]: 'like',
[FilterCriteriaEnum.endswith]: 'like',
[FilterCriteriaEnum.gt]: '>',
[FilterCriteriaEnum.lt]: '<',
[FilterCriteriaEnum.lte]: '<=',
[FilterCriteriaEnum.gte]: '>=',
[FilterCriteriaEnum.contains]: 'like',
[FilterCriteriaEnum.icontains]: 'not like',
[FilterCriteriaEnum.empty]: 'is',
};
const values = {
[FilterCriteriaEnum.startswith]: `${value}%`,
[FilterCriteriaEnum.endswith]: `%${value}`,
[FilterCriteriaEnum.contains]: `%${value}%`,
[FilterCriteriaEnum.icontains]: `%${value}%`,
[FilterCriteriaEnum.empty]: null,
};
builder.where(field, operators[criteria], values[criteria] || value);
}
}
})
.modify((builder) => {
if (settings.ordering_field && settings.ordering) {
builder.orderBy(settings.ordering_field, settings.ordering);
}
})
.limit(perPage)
.offset(offset)
.stream();
return rowsAsStream;
}
public async importCSVInTable(file: Express.Multer.File, tableName: string): Promise<void> {
const knex = await this.configureKnex();
const structure = await this.getTableStructure(tableName);
const timestampColumnNames = structure
.filter(({ data_type }) => isMySqlDateOrTimeType(data_type))
.map(({ column_name }) => column_name);
const stream = new Readable();
stream.push(file.buffer);
stream.push(null);
const parser = stream.pipe(csv.parse({ columns: true }));
const results: any[] = [];
for await (const record of parser) {
results.push(record);
}
try {
await knex.transaction(async (trx) => {
for (const row of results) {
for (const column of timestampColumnNames) {
if (row[column] && !isMySQLDateStringByRegexp(row[column])) {
const date = new Date(Number(row[column]));
const formattedDate = date.toISOString().slice(0, 19).replace('T', ' ');
row[column] = formattedDate;
}
}
await trx(tableName).insert(row);
}
});
} catch (error) {
throw error;
}
}
public async executeRawQuery(query: string): Promise<Array<Record<string, unknown>>> {
const knex = await this.configureKnex();
return await knex.raw(query);
}
private async getRowsCount(
knex: Knex<any, any[]>,
countRowsQB: Knex.QueryBuilder<any, any[]> | null,
tableName: string,
database: string,
): Promise<{ rowsCount: number; large_dataset: boolean }> {
if (countRowsQB) {
const slowRowsCount = await this.getRowsCountByQueryWithTimeOut(countRowsQB);
if (slowRowsCount) {
return {
rowsCount: slowRowsCount,
large_dataset: slowRowsCount >= DAO_CONSTANTS.LARGE_DATASET_ROW_LIMIT,
};
}
const fastRowsCount = await this.getFastRowsCount(knex, tableName, database);
return {
rowsCount: fastRowsCount,
large_dataset: fastRowsCount >= DAO_CONSTANTS.LARGE_DATASET_ROW_LIMIT,
};
}
const fastRowsCount = await this.getFastRowsCount(knex, tableName, database);
if (fastRowsCount >= DAO_CONSTANTS.LARGE_DATASET_ROW_LIMIT) {
return {
rowsCount: fastRowsCount,
large_dataset: true,
};
}
const slowRowsCount = await this.getSlowRowsCount(knex, tableName);
return {
rowsCount: slowRowsCount,
large_dataset: false,
};
}
private async getRowsCountByQueryWithTimeOut(countRowsQB: Knex.QueryBuilder<any, any[]>): Promise<number | null> {
return new Promise(async (resolve) => {
setTimeout(() => {
resolve(null);
}, DAO_CONSTANTS.COUNT_QUERY_TIMEOUT_MS);
try {
const slowCount = (await countRowsQB.count('*'))[0]['count(*)'] as number;
resolve(slowCount);
} catch (_error) {
resolve(null);
}
});
}
private async getSlowRowsCount(knex: Knex<any, any[]>, tableName: string): Promise<number | null> {
const slowCount = (await knex(tableName).count('*'))[0]['count(*)'] as number;
return slowCount;
}
private async getFastRowsCount(
knex: Knex<any, any[]>,
tableName: string,
databaseName: string,
): Promise<number | null> {
const fastCount = parseInt(
(await knex.raw(`SHOW TABLE STATUS IN ?? LIKE ?;`, [databaseName, tableName]))[0][0].Rows,
);
return fastCount;
}
}