improve SQL create table handling

[DenisCarriere]

• Improve SQL CREATE TABLE schema handling

Tests with

CREATE TABLE factory_pair_created (
    "evt_tx_hash" VARCHAR(64),
    "evt_index" INT,
    "evt_block_time" TIMESTAMP,
    "evt_block_number" DECIMAL,
    "pair" VARCHAR(40),
    "param3" DECIMAL,
    "token0" VARCHAR(40),
    "token1" VARCHAR(40),
    PRIMARY KEY(evt_tx_hash,evt_index)
)

CREATE TABLE block_meta
(
    id          TEXT NOT NULL CONSTRAINT block_meta_pk PRIMARY KEY,
    at          TIMESTAMP,
    number      BIGINT,
    hash        TEXT,
    parent_hash TEXT,
    timestamp   TIMESTAMP
);