Update sql_alchemy.py 兼容postgresql&&greenplum#4284
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15527804152 wants to merge 1 commit intocloudera:masterfrom
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Update sql_alchemy.py 兼容postgresql&&greenplum#428415527804152 wants to merge 1 commit intocloudera:masterfrom
15527804152 wants to merge 1 commit intocloudera:masterfrom
