add InspectDb and show_create_tables

poetry.lock

@@ -127,6 +127,17 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "ddlparse"
+version = "1.9.0"
+description = "DDL parase and Convert to BigQuery JSON schema"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pyparsing = "*"
+
 [[package]]
 name = "execnet"
 version = "1.7.1"
@@ -331,7 +342,7 @@ rsa = ["cryptography"]
 name = "pyparsing"
 version = "2.4.7"
 description = "Python parsing module"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
@@ -536,7 +547,7 @@ dbdrivers = ["aiomysql", "asyncpg"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "ff0825922451c3ebd311666956adc8987677dc66fe5321565213cd3568ebd9ae"
+content-hash = "9adf7beba99d615c71a9148391386c9016cbafc7c11c5fc3ad81c8ec61026236"
 
 [metadata.files]
 aiomysql = [
@@ -605,6 +616,10 @@ colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
+ddlparse = [
+    {file = "ddlparse-1.9.0-py3-none-any.whl", hash = "sha256:a7962615a9325be7d0f182cbe34011e6283996473fb98c784c6f675b9783bc18"},
+    {file = "ddlparse-1.9.0.tar.gz", hash = "sha256:cdffcf2f692f304a23c8e903b00afd7e83a920b79a2ff4e2f25c875b369d4f58"},
+]
 execnet = [
     {file = "execnet-1.7.1-py2.py3-none-any.whl", hash = "sha256:d4efd397930c46415f62f8a31388d6be4f27a91d7550eb79bc64a756e0056547"},
     {file = "execnet-1.7.1.tar.gz", hash = "sha256:cacb9df31c9680ec5f95553976c4da484d407e85e41c83cb812aa014f0eddc50"},