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sqlite index analysis

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Jan Prochazka 2021-08-25 19:57:11 +02:00
parent b9e2e51bd7
commit a5b5f36298
1 changed files with 25 additions and 0 deletions
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25
plugins/dbgate-plugin-sqlite/src/backend/Analyser.js
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@ -1,6 +1,19 @@
const _ = require('lodash');
const { DatabaseAnalyser } = require('dbgate-tools');
const indexcolsQuery = `
SELECT
m.name as tableName,
il.name as constraintName,
il."unique" as isUnique,
ii.name as columnName
FROM sqlite_schema AS m,
pragma_index_list(m.name) AS il,
pragma_index_info(il.name) AS ii
WHERE m.type='table' AND il.name NOT LIKE 'sqlite_autoindex_%'
ORDER BY ii.seqno
`;
class Analyser extends DatabaseAnalyser {
constructor(pool, driver) {
super(pool, driver);
@ -51,6 +64,8 @@ class Analyser extends DatabaseAnalyser {
createSql: x.sql,
}));
const indexcols = await this.driver.query(this.pool, indexcolsQuery);
for (const tableName of this.getRequestedObjectPureNames(
'tables',
tables.map((x) => x.name)
@ -67,6 +82,16 @@ class Analyser extends DatabaseAnalyser {
autoIncrement: tableSqls[tableName].toLowerCase().includes('autoincrement') && !!col.pk,
}));
const indexNames = _.uniq(indexcols.rows.filter((x) => x.tableName == tableName).map((x) => x.constraintName));
tableObj.indexes = indexNames.map((idx) => ({
constraintName: idx,
isUnique: !!indexcols.rows.find((x) => x.tableName == tableName && x.constraintName == idx).isUnique,
columns: indexcols.rows
.filter((x) => x.tableName == tableName && x.constraintName == idx)
.map(({ columnName }) => ({ columnName })),
}));
const pkColumns = info.rows
.filter((x) => x.pk)
.map((col) => ({