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show table row count for MySQL

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This commit is contained in:
Jan Prochazka
2022-02-10 16:07:44 +01:00
parent 0debe66dd0
commit 4e221ecd3a
9 changed files with 69 additions and 5 deletions
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56
packages/tools/src/DatabaseAnalyser.ts
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@@ -8,6 +8,26 @@ const STRUCTURE_FIELDS = ['tables', 'collections', 'views', 'matviews', 'functio
const fp_pick = arg => array => _pick(array, arg);
function mergeTableRowCounts(info: DatabaseInfo, rowCounts): DatabaseInfo {
return {
...info,
tables: (info.tables || []).map(table => ({
...table,
tableRowCount: rowCounts.find(x => x.objectId == table.objectId)?.tableRowCount ?? table.tableRowCount,
})),
};
}
function areDifferentRowCounts(db1: DatabaseInfo, db2: DatabaseInfo) {
for (const t1 of db1.tables || []) {
const t2 = (db2.tables || []).find(x => x.objectId == t1.objectId);
if (t1?.tableRowCount !== t2?.tableRowCount) {
return true;
}
}
return false;
}
export class DatabaseAnalyser {
structure: DatabaseInfo;
modifications: DatabaseModification[];
@@ -64,13 +84,29 @@ export class DatabaseAnalyser {
async incrementalAnalysis(structure) {
this.structure = structure;
this.modifications = await this.getModifications();
if (this.modifications == null) {
const modifications = await this.getModifications();
if (modifications == null) {
// modifications not implemented, perform full analysis
this.structure = null;
return this.addEngineField(await this._runAnalysis());
}
if (this.modifications.length == 0) return null;
const structureModifications = modifications.filter(x => x.action != 'setTableRowCounts');
const setTableRowCounts = modifications.find(x => x.action == 'setTableRowCounts');
let structureWithRowCounts = null;
if (setTableRowCounts) {
const newStructure = mergeTableRowCounts(structure, setTableRowCounts.rowCounts);
if (areDifferentRowCounts(structure, newStructure)) {
structureWithRowCounts = newStructure;
}
}
if (structureModifications.length == 0) {
return structureWithRowCounts ? this.addEngineField(structureWithRowCounts) : null;
}
this.modifications = structureModifications;
if (structureWithRowCounts) this.structure = structureWithRowCounts;
console.log('DB modifications detected:', this.modifications);
return this.addEngineField(this.mergeAnalyseResult(await this._runAnalysis()));
}
@@ -226,6 +262,20 @@ export class DatabaseAnalyser {
}
}
const rowCounts = (snapshot.tables || [])
.filter(x => x.tableRowCount != null)
.map(x => ({
objectId: x.objectId,
tableRowCount: x.tableRowCount,
}));
if (rowCounts.length > 0) {
res.push({
action: 'setTableRowCounts',
rowCounts,
});
}
return [..._compact(res), ...this.getDeletedObjects(snapshot)];
}