python library for extracting table names from from clause in SQL Statetments,
Question:
i have a complex SQL like below. I’m looking for a python (3+) library that would extract the table names that are contained in the from clauses. I’m mapping a client’s database & views & reports, and have dozens of queries to map, so the need to automate the job.
Already looked at Python-sqlparse , sqlparse, but I’m not sure they are up to the task and I’m trying to avoid the learning curve.
SELECT --Locais Disponíveis para Abertura de Ordens de corte
COALESCE(a."Chave", b."Chave") AS "Chave",
COALESCE(a."Unidade", b."Unidade") AS "Unidade",
COALESCE(a."Fazenda", b."Fazenda") AS "Fazenda",
COALESCE(a."Talhao", b."Talhao") AS "Talhao",
COALESCE(a."Participacao", b."Participacao") AS "Participacao",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
'Disponível (Safra+Mudas)'
ELSE
COALESCE(a."Condicao", b."Condicao")
END AS "Condicao",
COALESCE(a."Estagio", b."Estagio") AS "Estagio",
COALESCE(a."Variedade", b."Variedade") AS "Variedade",
COALESCE(a."Ciclo Maturacao", b."Ciclo Maturacao") AS "Ciclo Maturacao",
COALESCE(a."Propriedade", b."Propriedade") AS "Propriedade",
COALESCE(a."Proprietario", b."Proprietario") AS "Proprietario",
COALESCE(a."No. Corte", b."No. Corte") AS "No. Corte",
(CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) AS "Area",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
((CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) * a."TCH")
ELSE
a."Toneladas"
END AS "Toneladas",
a."TCH",
COALESCE(a."Distancia", b."Distancia") AS "Distancia"
FROM (SELECT --Disponibilidade (Moagem)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Moagem)'
ELSE
'Disponível Parcial (Moagem)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST NOT IN ('E', 'S')
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST NOT IN ('E', 'S')
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE SAFRA FECHADA B
QD.CD_UPNIVEL1 AS "Fazenda",
QD.CD_UPNIVEL3 AS "Talhao",
SUM(QD.QT_AREA) AS "Area Fechada"
FROM PIMSCS.QUEIMA_HE QH, PIMSCS.QUEIMA_DE QD
WHERE QH.NO_QUEIMA = QD.NO_QUEIMA
AND QD.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
GROUP BY QD.CD_UPNIVEL1, QD.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST NOT IN ('E', 'S')
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST NOT IN ('E', 'S'))) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") A
FULL JOIN (SELECT --Disponibilidade (Mudas)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Mudas)'
ELSE
'Disponível Parcial (Mudas)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST = 'S'
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST = 'S'
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE MUDAS FECHADA B
A.CD_UPNIVEL1 AS "Fazenda",
A.CD_UPNIVEL3 AS "Talhao",
SUM(A.QT_AREA) AS "Area Fechada"
FROM PIMSCS.OCORTEMD_DE A
JOIN PIMSCS.OCORTEMD_HE B
ON A.NO_ORDEM = B.NO_ORDEM
WHERE A.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND B.FG_SITUACAO = 'F'
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST = 'S'
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST = 'S')) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") B
ON a."Chave" = b."Chave"
Answers:
You can use sqlparse with a recursive generator function:
import sqlparse, re
def get_tables(d):
f = False
for i in getattr(d, 'tokens', []):
if isinstance(i, sqlparse.sql.Token) and i.value.lower() == 'from':
f = True
elif isinstance(i, (sqlparse.sql.Identifier, sqlparse.sql.IdentifierList)) and f:
f = False
if not any(isinstance(x, sqlparse.sql.Parenthesis) or 'select' in x.value.lower() for x in getattr(i, 'tokens', [])):
fr = ''.join(str(j) for j in i if j.value not in {'as', 'n'})
for t in re.findall('(?:w+.w+|w+)s+w+|(?:w+.w+|w+)', fr):
yield {'table':(t1:=t.split())[0], 'alias':None if len(t1) < 2 else t1[-1]}
yield from get_tables(i)
print(list(get_tables(sqlparse.parse(s)[0])))
Output:
[{'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.QUEIMA_HE', 'alias': 'QH'}, {'table': 'PIMSCS.QUEIMA_DE', 'alias': 'QD'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.OCORTEMD_DE', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}]
I created Sqlglot which can parse your SQL.
import sqlglot
import sqlglot.expressions as exp
expression = sqlglot.parse_one(..., read=“oracle”)
list(expression.find_all(exp.Table))
i have a complex SQL like below. I’m looking for a python (3+) library that would extract the table names that are contained in the from clauses. I’m mapping a client’s database & views & reports, and have dozens of queries to map, so the need to automate the job.
Already looked at Python-sqlparse , sqlparse, but I’m not sure they are up to the task and I’m trying to avoid the learning curve.
SELECT --Locais Disponíveis para Abertura de Ordens de corte
COALESCE(a."Chave", b."Chave") AS "Chave",
COALESCE(a."Unidade", b."Unidade") AS "Unidade",
COALESCE(a."Fazenda", b."Fazenda") AS "Fazenda",
COALESCE(a."Talhao", b."Talhao") AS "Talhao",
COALESCE(a."Participacao", b."Participacao") AS "Participacao",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
'Disponível (Safra+Mudas)'
ELSE
COALESCE(a."Condicao", b."Condicao")
END AS "Condicao",
COALESCE(a."Estagio", b."Estagio") AS "Estagio",
COALESCE(a."Variedade", b."Variedade") AS "Variedade",
COALESCE(a."Ciclo Maturacao", b."Ciclo Maturacao") AS "Ciclo Maturacao",
COALESCE(a."Propriedade", b."Propriedade") AS "Propriedade",
COALESCE(a."Proprietario", b."Proprietario") AS "Proprietario",
COALESCE(a."No. Corte", b."No. Corte") AS "No. Corte",
(CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) AS "Area",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
((CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) * a."TCH")
ELSE
a."Toneladas"
END AS "Toneladas",
a."TCH",
COALESCE(a."Distancia", b."Distancia") AS "Distancia"
FROM (SELECT --Disponibilidade (Moagem)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Moagem)'
ELSE
'Disponível Parcial (Moagem)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST NOT IN ('E', 'S')
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST NOT IN ('E', 'S')
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE SAFRA FECHADA B
QD.CD_UPNIVEL1 AS "Fazenda",
QD.CD_UPNIVEL3 AS "Talhao",
SUM(QD.QT_AREA) AS "Area Fechada"
FROM PIMSCS.QUEIMA_HE QH, PIMSCS.QUEIMA_DE QD
WHERE QH.NO_QUEIMA = QD.NO_QUEIMA
AND QD.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
GROUP BY QD.CD_UPNIVEL1, QD.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST NOT IN ('E', 'S')
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST NOT IN ('E', 'S'))) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") A
FULL JOIN (SELECT --Disponibilidade (Mudas)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Mudas)'
ELSE
'Disponível Parcial (Mudas)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST = 'S'
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST = 'S'
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE MUDAS FECHADA B
A.CD_UPNIVEL1 AS "Fazenda",
A.CD_UPNIVEL3 AS "Talhao",
SUM(A.QT_AREA) AS "Area Fechada"
FROM PIMSCS.OCORTEMD_DE A
JOIN PIMSCS.OCORTEMD_HE B
ON A.NO_ORDEM = B.NO_ORDEM
WHERE A.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND B.FG_SITUACAO = 'F'
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST = 'S'
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST = 'S')) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") B
ON a."Chave" = b."Chave"
You can use sqlparse with a recursive generator function:
import sqlparse, re
def get_tables(d):
f = False
for i in getattr(d, 'tokens', []):
if isinstance(i, sqlparse.sql.Token) and i.value.lower() == 'from':
f = True
elif isinstance(i, (sqlparse.sql.Identifier, sqlparse.sql.IdentifierList)) and f:
f = False
if not any(isinstance(x, sqlparse.sql.Parenthesis) or 'select' in x.value.lower() for x in getattr(i, 'tokens', [])):
fr = ''.join(str(j) for j in i if j.value not in {'as', 'n'})
for t in re.findall('(?:w+.w+|w+)s+w+|(?:w+.w+|w+)', fr):
yield {'table':(t1:=t.split())[0], 'alias':None if len(t1) < 2 else t1[-1]}
yield from get_tables(i)
print(list(get_tables(sqlparse.parse(s)[0])))
Output:
[{'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.QUEIMA_HE', 'alias': 'QH'}, {'table': 'PIMSCS.QUEIMA_DE', 'alias': 'QD'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.OCORTEMD_DE', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}]
I created Sqlglot which can parse your SQL.
import sqlglot
import sqlglot.expressions as exp
expression = sqlglot.parse_one(..., read=“oracle”)
list(expression.find_all(exp.Table))