diff --git a/src/sqlParser.jison b/src/sqlParser.jison
index 4a8efbc..a7abaef 100644
--- a/src/sqlParser.jison
+++ b/src/sqlParser.jison
@@ -587,6 +587,7 @@ index_hint
table_factor
: identifier partitionOpt aliasOpt index_hint_list_opt { $$ = { type: 'TableFactor', value: $1, partition: $2, alias: $3.alias, hasAs: $3.hasAs, indexHintOpt: $4 } }
| '(' selectClause ')' aliasOpt { $$ = { type: 'TableFactor', value: { type: 'SubQuery', value: $2 }, alias: $4.alias, hasAs: $4.hasAs} }
+ | '(' unionClauseNotParenthesized ')' aliasOpt { $$ = { type: 'TableFactor', value: { type: 'SubQuery', value: $2 }, alias: $4.alias, hasAs: $4.hasAs} }
| '(' table_references ')' { $$ = $2; $$.hasParentheses = true }
;
place_holder
diff --git a/test/main.test.js b/test/main.test.js
index 2ee9c1b..2029b83 100644
--- a/test/main.test.js
+++ b/test/main.test.js
@@ -436,4 +436,45 @@ describe('select grammar support', function () {
it('test IDENTIFIER', function () {
testParser('select `aa#sfs`(a) as \'A A\' from z');
});
+
+ it('test from with union select', function (){
+ testParser(`select
+ (select min(actividad)
+ from
+ ( select client_id,
+ (select code_description from m_code_value where code_id =61 and id=LActividadEconomica_cd_own_business_main_activity) actividad,
+ estimated_amount_income_employer monto
+ from m_clientDetalleNegocios
+ union all
+ select client_id,
+ (select code_description from m_code_value where code_id =47 and id=Ltipoingreso_cd_income_type) actividad , other_incomes_estimated_amount monto
+ from m_clientDetalleOtrosIngresos
+ union all
+ select client_id, case r.Lsector_cd_Sector when 154 then 755 else 754 end actividad,
+ r.estimated_incomes_amount monto
+ from m_clientDetalleRelLaboral r
+ ) actividades
+ where monto =
+ ( select max(monto)
+ from
+ (
+ select client_id,
+ (select code_description
+ from m_code_value where code_id =61 and id=LActividadEconomica_cd_own_business_main_activity) actividad, estimated_amount_income_employer monto
+ from m_clientDetalleNegocios
+ union all
+ select client_id,
+ (select code_description from m_code_value where code_id =47 and id=Ltipoingreso_cd_income_type) actividad , other_incomes_estimated_amount monto
+ from m_clientDetalleOtrosIngresos
+ union all
+ select client_id, case r.Lsector_cd_Sector when 154 then 755 else 754 end actividad, r.estimated_incomes_amount monto
+ from m_clientDetalleRelLaboral r
+ ) maxact
+ where client_id = actividades.client_id
+ )
+ and client_id =cli.id
+ ) as c55017
+ from m_client cli`)
+ })
+
});
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