Hi, 

I found some "CREATE TABLE ... AS ... " syntaxes could not be used in ECPG. 

[PROBLEM]
First, ECPG command is failed when the source code (*.pgc) has "IF NOT EXISTS". 
-------------------------------------------------------------------
EXEC SQL CREATE TABLE IF NOT EXISTS test_cta AS SELECT * FROM test;
-------------------------------------------------------------------

Second, ECPG command is succeeded when the source code (*.pgc) has following 
embedded SQL. However, created c program has no "WITH NO DATA". 
------------------------------------------------------------------
EXEC SQL CREATE TABLE test_cta AS SELECT * FROM test WITH NO DATA;
------------------------------------------------------------------

[Investigation]
In my investigation, parse.pl ignore type CreateAsStmt of gram.y and 
CreateAsStmt is defined in ecpg.trailer. ECPG use ecpg.trailer's CreateAsStmt. 
However, ecpg.trailer lacks some syntaxes. 
I feel ignoring type CreateAsStmt of gram.y is strange. Seeing ecpg.trailer, it 
seems that ECPG wanted to output the message "CREATE TABLE AS cannot specify 
INTO" but is this needed now? In view of the maintenance, ECPG should use not 
ecpg.trailer's definition but gram.y's one. 

I attached the patch for this and I will register this for next CF. 

Regards, 
Daisuke Higuchi

Attachment: FIX_ECPG_CREATE_TABLE_AS_v1.patch
Description: FIX_ECPG_CREATE_TABLE_AS_v1.patch

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